Skip to main content

Gas Generator, E.T.P, Air compressor, Scouring Bleaching machine, Singing and Desizing Machine



                                           Air compressor

Air compressor: Air compressor is a machine which produces dry air from atmosphere. It is necessary to run various types of machine.
                     
          

                        Figure: Air compressor


                                      Main parts:

                                    1. Separator
                                    2. Pump
                                    3. Motor
                                   4. Air cooler
                                   5. Filter
                                   6. Oil tank
                                   7. Reservoir
                                   8. Air dryer
                                   9. Exhaust fan



1. Separator: Separators separates air and oil. Then the separated air is reserved in reservoir by output line.


2. Pump: Pump is a device which pumps air from motor and oil from oil tank. Oil reduces the friction in screw and increases air pressure. Then air is supplied to the filter.


3. Filter: Filter is a device which purifies the air and reduces unwanted substance from air. The filter air is supplied in the separator.


4. Motor: Motor helps to collect the air from the atmosphere by the help of blower.


5. Air cooler: Air cooler is used to cool the atmospheric air. It places on the motor.


6. Reservoir tank: There are two reservoirs which reserve separated purifies air from oil.


7. Air dryer: Air dryer collects air from reservoir tank and dries the air by the help  of compressor. After drying the air, it is supplied for machine use.


8.Exhaust fan: It is used to cool the machine removing heated air.

Description: The electric motor produces air with the help of blower from the atmospheric air. The motor is cooled by air cooler. The air passes through the screw. In the screw oil is supplied from oil tank to reduce friction so that the Screw rotates freely. Then the air and small amount of oil through the pump the pump increases the pressure of air and pass into the filter to reduce the impurities from air. After filtering the air enters into the oil tank. In oil tank, there is a separator which separates the oil and air. Then the air passes through the pipe line and enters into the reservoirs to reserve the air and pass through the dryer. In dryer the air is dried and passes through the pipe to the use of various machines.

Application: To produce dry air.


                            Gas Generator


Gas Generator: Generator is a device that converts mechanical energy to electrical energy. The source of mechanical energy may be reciprocating, water filling through a water wheel. The reverse conversation of electrical into mechanical energy is done by electric motor.
                                                   
          

                                   Figure:  Gas generator


 Main parts:

a. Electrical part


b. Mechanical part


a. Electrical part:

 
1. Stator
2. Rotor
3. Spinder
4. Slots
5. Rings
6. Brushes
7. Case bars
8. End rings
9. Cage winding
10. Stator core
11. Stator frame
b. Mechanical parts:
1. Throttle valve
2. Intake manifold
3. Push rod
4. Engine cooling water return line
5. Rocker arm(exhaust)
6. Ignition coil
7. Crank case ventilator
8. Piston
9. Exhaust gas manifold
10. Piston pin
11. Cylinder line

12. Main engine oil ducts
13. Tappets
14. Cam shaft
15. Piston cooling nozzle
16. Crank shaft with counter weight
17. Crank case
18. Engine oil pump
19. Engine oil pan.



Main operation in mechanical parts:


a) Water cooling system:


1. Cooling tower
2. Feed pump
3. Heat exchanger
4. Return water line
5. Jacket water line


1) Cooling tower: The main purpose of cooling tower is to cool the water. In cooling tower a large fan is always rotated by motor to reduce the heat of water.


2) Feed pump: It helps to transmit the water in cooling tower. The feed pump line is connected between cooling tower and heat exchanger.


3) Heat exchanger: It is a device which is used to reduce the temperature of return water.


4) Return water line: After cooling water it passes through the generator body to reduce its heat. Generally the return water temperature is kept in 57-58°C.


5) Jacket water line:
The heated water which cooled the engine body it comes out from the body by jacket water line. It is connected with heat exchanger to return the water in cooling tower. Generally the jacket water temperature is 60-70°C.


b) Circulation of fuel:
 
1. Engine oil supply line
2. Gas mixture cylinder
3. Heat exchanger
4. Engine oil filter
5. Engine oil return line


1) Engine oil supply line
: It is connected with oil tank and supply oil into the engine by supply line.


2) Gas mixture cylinder:
In gas mixture cylinder, the ratio of air and gas is 11:1. The carburetor mixes the air and gas by help of oil.


3) Heat exchanger: Heat exchanger decreases the temperature of oil.


4) Engine oil filter: It reduces the impurities from oil.


5) Engine oil return line: Filtered oil is gone through the exhaust gas
turbocharge by the engine oil return line. The oil circulates the engine body continuously.


c) Ignition system: Gas engines are are equipped with a microprocessor controlled capacitor discharge ignition system.. The ignition system is run with a supply voltage of 2 ᶲ V DC.


1. Firing sequence
2. Ignition pulse
3. Ignition point


1) Firing sequence: The firing sequence is adjusted by adapting the ignition box.


2) Ignition pulse: The ignition box supplies the ignition energy to the ignition coils, which then generates the high tension voltage for the spark plug.


3) Ignition point: The firing point is optimized by the engine management system depending on operating conditions and type of fuel gas used.


              


                                      Figure: Cross section parts of gas generator

Function and operation of various parts:


1. Intake air collector: It collects air from the blower which connected by a motor in the body of generator.


2. Gas mixture: In gas mixer cylinder it mixed gas and air.


3. Actuator: Actuator maintains pressure of gas mixer.


4. Engine cooling water pump: Engine cooling water pump cool the water to prevent over heated the engine body.


5. Engine cooling water return line: After surrounding the water in the body the water go through the return line.


6. Temperature control valve: Temperature control valve control the water temperature of the engine body.


7. Ignition coil: Ignition coil help to create firing sequence by DC voltage system.


8. Cylinder: In cylinder the combustion process is done.


9. Cylinder head: Cylinder head is connected with cylinder and the firing of ignition is occurring in the place.


10. Cylinder head cover: Cylinder cover protected the cylinder head and cylinder.


11. Exhaust gas manifold: After combustion the exhaust gas came out by exhaust gas manifold.


12. Starter: It helps to start engine.


13. Engine oil pan: Mainly oil reserve in oil pan which circulated the engine.


14. Toothed flywheel: And by the rotating of flywheel electrical part produce power.


Application:
It produces power which is used to run the mills.



                                                                 E.T.P

E.T.P: Effluent treatment plant (E.T.P) is one kind of biochemical water treatment plant. E.T.P seeks to manage four main problem areas: scaling, corrosion, microbiological activity and disposal of residual waste. It reduces the toxicity and acidity of used and chemicalized water. Generally the pH of water and the ratio of oxygen and hydrogen are controlled to protect environment in this plant.
           
                                                 
                                                             Figure: Process of E.T.P



                                                 Major parts of E.T.P


         1. Equalization tank: Equalization tank reserves the waste and chemicalized water. In this tank diffuser pipe line is connected to increase the oxygen of chemicalized water.

                            


         2. Air diffuser: There are four diffusers used to supply air in the tank to increase the amount of oxygen of chemicalized water.

         3. Submersible pump: Submersible pump is used to transfer the residual waste water in Flocculation tank from Equalization tank.

         4. Flocculation tank: In Flocculation tank, the residual waste water is mixed with FeSO₄, CaO and polyelectrolyte to neutralize the quality of water.

                                        
  
                                       Figure: E.T.P parts    

5. Chemical tank: There are five chemical tank to mix the chemical and by feed pump the chemical is supplied to the Flocculation tank.

6. Filter: After neutralized the water is supplied in the filter to separate liquid and other substance.


7. Conditioning tank: After filtering heavy substance of the liquid is collected in conditioning tank.


8. Filter press: In filter press the heavy substance of the liquid is converted in solid form.


9. S.B.R: After filter the liquid substance of water stored in S.B.R-1 and S.B.R-2 tank. In this tank HCl is supplied to control pH. After 4 hours the water is supplied in outlet tank.


10. Outlet tank: By outlet tank the purified water is supplied for other purpose.


                                                   

                





        Refining process of E.T.P:

 
The effluent water and waste from the mills enter into the equalization tank. In equalization tank, there are many blowers to supply air for increasing the amount of oxygen of the tank effluent water. From equalization tank the water is pumped into the flocculation tank, there is a flow meter to measure the pumped water. The chemical mixture from the chemical tank and acid from the acid drum pass through pipe and enter the flocculation tank. In the flocculation tank, there are two pipe lines to pass the water. One pipe line is to pass into the conditioning tank and other is filter tank. In filter tank, the water is filtered. After filtering the water enters into the S.B.R -1 and S.B.R-2 tank. In S.B.R-1 1 and S.B.R-2 tank the water stays for four hours. In this tank, pH of water is maintained between 7 to 7.5 In conditioning tank, the mud water is pumped through the water tank and filter tank. In filter tank, the water is filtered by the filter machine and the filtering water gain enters into theconditioning tank.


Application:
The toxic waste water is harmful for the environment. SO the E.T.P process is applied to reduce the toxicity of the waste water and protect the environment.




                      Singing and Desizing Machine


Singeing: Singeing is a process to burn off the surface fibers from the fabric to produce smoothness. The fabric passes over brushes to raise the fibers, and then passes over a plate heated by gas flames.

Desizing: Desizing is a process to remove sizing chemical and other impurities.

           Parts of machine:
                1. Burner chamber
                2. Chemical reaction chamber


                                                    


                                         
                                           

                                      Figure Singing and Desizing Machine


                              Scouring Bleaching machine


Scouring: Scouring is the process to reduce the residue of cloth by using high strength NaOH.

Bleaching: Bleaching is the process to improve whiteness by removing natural coloration and remaining trace impurities from the cotton.

        Section of machine:
          1. Scouring
          2. Bleaching
          3. Drying


         
                            
                      Figure:   Scouring Bleaching machine

Comments

Post a Comment

Popular posts from this blog

How to Calculate Heat Rate of Generator Engine?

Types of Power Plant (Technology) Natural Gas Based power plant technology Diesel power plant technology Heat Rate of Engine= Fuel Flow or Fuel burned * Fuel Heating Value / Power Output 1 Liter Diesel = 0.85 Kg Example: Heat Rate of Diesel Generator at 100% Load Engine Model- 2506A-E15TAG2 Engine Capacity=400 eKW Fuel Consumption=84 L = 71.4 Kg Electrical Energy Output = 400 KW Heating Value of Diesel = 42.5 MJ/Kg Heat Rate of Engine= Fuel Flow or Fuel burned * Fuel Heating Value / Power          Output Heat Rate of Engine = 71.4 Kg * 42.5 MJ/Kg /400KW   Heat Rate of Engine =7.58 MJ/KWH Heat Rate of Gas Generator at 100% Load Engine Model- VHP5904LTD Engine Capacity= 900 eKW Fuel Consumption= 271 Nm 3 Electrical Energy Output= 900 KW Fuel Consumption= 0.28 Nm3/KWH Heating Value of Natural Gas= 35.22 MJ/ Nm 3 Heat Rate of Engine= Fuel Flow or Fuel burned * Fuel Heating Value / Power          Output   

Packing, Seals and Gaskets

Packing, seal and gasket resists the flow of fluid from machinery face, head, joint and machinery gap or clearance. Packing materials: Fiber, asbestos, cotton, synthetic materials, plastic, Teflon, graphite etc. Packing structure: Twisted, Braided and Consolidated. Gasket:             A gasket is a mechanical seal that fills the space between two mating surfaces, generally to prevent leakage from or into the joined objects while under compression. Gaskets allow " less-than-perfect " mating surfaces on machine parts where they can fill irregularities. Gaskets are commonly produced by cutting from sheet materials, such as gasket paper, rubber, silicone, metal, cork, felt, neoprene, nitrile rubber, fiberglass, or a plastic polymer (such as polychlorotrifluoroethylene)                                                                                                Figure : Gaskets Name of the gasket                       uses

Why a dc generator fails to build up voltage?

How can the problem be remedied : No residual magnetism, reversed field connection and high resistance of field circuit are responsible for the failure of build up process of a dc generator. The factors are explained below: No residual magnetism:    For the starting build up process requires some residual magnetism in the magnetic circuit then no voltage will be generated that can produce current flow through field circuit. Reversed field connection:    The voltage induced inside the coil of field circuit due to residual magnetism that can permit the flow of current. For the following direction of this flux will be created and the direction of this flux will be same direction as the residual flux. If the field connections are reversed the lines of flux produced by current flow will oppose the residual flux, as a result generate voltage will decrease rather than increase. So voltage build up process failed. Field circuit resistance too high:   A field

what is the difference between long shunt and short shunt dc generator?

How do they differ from normal generator?    Draw their V-I characteristics and explain them? In short shunt connection the shunt field is connected directly across the armature terminals and the armature connection equals the sum of the shunt field current plus the load current . In this instance the load current flow s through the series field winding so that the load current and series field current are one and same.              In long shunt connection the voltage across the shunt field is the same as the terminal voltage of the generator and current in the armature will be the current in the series field. The armature current equals the shunt field current plus the load current.   A shunt generator has the field circuit connected directly across the armature. As more devices connected in parallel the load on the generator increases that the generator current increases which results decrease in terminal voltage of the generator.  

Therbligs and Basic 17 motion name of therblig

Therbligs : A graphical representation of the co-ordinated activities of an operators body members. These activities ar described in terms of basic or fundamental motions known as therbligs.                                         At the time Frank Gilbreth was doing his work in the field of motion study, he also concluded that any manual activity could be described in terms of 17 fundamental motions. This comparable to our being able to describe every word in the English language in terms of some of the 26 letters of the alphabet. Each of these fundamental motions is called a Therblig. Basic 17 motion name of Therblig : Name of Therblig Letter abbreviation Search Select Grasp Transport empty Transport loaded Hold Release Load Position Pre-position Inspect Assemble Disassemble Use Unavoidable    Delay Avoidable Delay Plan Rest Sh ST G

Various Methods of Drawing Flow Nets

  1.       Hydraulic models: a.        Streamlines can be traced by injecting a dye in a seepage model or Heleshaw apparatus. b.       They by drawing equipotential lines the flow net is completed. 2.       Analytical Method: a.        It is only applied to problems with simple and ideal boundaries conditions. b.       The equation corresponding curve Ç¿ and Ñ° are first obtained and the same are plotted to give the flow net pattern for the flow of fluid between the given boundary shape. 3.       Electrical Analogy Method: This method based on the fact that the flow of fluids and flow of electricity through a conductor are analogus. These two systems are similar in the respect that electric potential is analogus to the velocity potential. The electric current is analogus to the velocity of flow and the homogeneous conductor is analogus to the homogeneous fluid. This method only for a practical method of drawing a flow net for a particular set of boundaries.

Which type of Battery connection Series or Parallel Connection is used for Diesel Generator?

Diesel Generator Battery Connection Batteries can emit explosive gases.     To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To remove the possibility of arching, remove the negative battery cable is first and attach the negative battery last. When using jumper cables to start the engine make sure to connect the cables in parallel Positive to positive and negative to negative. When using external electrical source to start the engine, turn the disconnect switch to the OFF position. Remove the key before attaching the jumper cables. To avoid damage to engine parts do not connect jumper starting or battery charging cable to any fuel system or electronic component. Battery Parallel Connection: The accompanying illustration shows a typical parallel battery connection. This arrangement doubles the cranking amperage. Battery Series Connection: This illustration shows a typical

what is PIV drive? Why is PIV drive more effective than any other system of drive?

PIV Drive: A stepless drive where the transmission of torque takes place infinitly variable without   slip is called PIV drive. There are some advantages of PIV drive: there is no slip in the transmission of power. Maximum transmission of power. Speed can be changed at running condition Any range of slip can be obtain It give constant cutting speed for the above reason PIV drive is more effective than any other system   of drive

What are the main components of Automobile?

  There have five basic parts for Automobile and they are given bellow: 1.      Engine: Engine which is known to all as a power plant. Engine is the source of power which makes the car wheels rotate and the car move where it supply power to lubricating, fuel, electric and cooling systems. 2.      Frame:   Frame support the engine, body and wheels. 3.      Power train: Power train transmit the power engine to the car wheels where its contain clutch, transmission, propeller shaft, axles and differential.  4.      Car Body 5.      Car body accessories: A car body accessory contains the heater, lights, radio, windshield wiper and convertible top raiser.

“Equalizer connection is needed in lap winding armature but not in wave winding “ why ?

 The equivalent circuit of a four point – pole dynamo with a simplex winding. The voltage induced in each path is assumed to both to be same and should be if the reluctance of each magnetic path is the same, so that the lines of flux cut by each inductor of each path are the same. However wear of the bearings or deflection of the armature shaft may cause the armature to be closer to some poles and farther from others, thus changing the length of the air gap, and therefore the reluctance of the magnetic circuits of the poles is not identical. This factors cause the voltage in the materials making up the magnetic circuit. These factors cause the voltage in each parallel path differ, and the unequal voltages in turn cause flow of a circulating   current through the windings and brushes , undue heating of the armature and waste the power. To reduce the circulating current, points on the winding which should be at the same potentials are brought to the same potentials by connecting