CN214499565U - Centrifugal air compressor step waste heat recovery system - Google Patents
Centrifugal air compressor step waste heat recovery system Download PDFInfo
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- CN214499565U CN214499565U CN202120604015.4U CN202120604015U CN214499565U CN 214499565 U CN214499565 U CN 214499565U CN 202120604015 U CN202120604015 U CN 202120604015U CN 214499565 U CN214499565 U CN 214499565U
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Abstract
The utility model discloses a centrifugal air compressor step waste heat recovery system is to change the intercooler after the preceding two-stage compression of centrifugal air compressor machine for high-efficient gas-water heat exchanger, through gas-water heat transfer, absorbs the heat in the high temperature compressed air, prepares high temperature hot water about 80 ℃. High-temperature hot water at about 80 ℃ can be used as a primary heat source and is used for preparing shower hot water or heating air conditioner backwater and the like through a water-water plate type heat exchanger; meanwhile, a post cooler after the third stage of compression of the centrifugal air compressor is eliminated, a compression heat regeneration dryer is configured, the high-temperature compressed air at the last stage of the air compressor is used for desorbing moisture in the drying agent, and the energy consumption of the dryer in the heating regeneration process is reduced, so that the step waste heat recycling of the centrifugal air compressor is realized.
Description
Technical Field
The utility model relates to a centrifugal air compressor machine step waste heat recovery system adopts different recovery plant or device promptly, and the step retrieves the waste heat of each grade production of centrifugal air compressor machine, furthest retrieves the heat to found complete centrifugal air compressor machine step waste heat recovery and utilization system.
Background
In the operation process of the air compressor, about 85 percent of electric energy is converted into heat energy, and if the redundant heat energy is not discharged, the high temperature of the motor and the exhaust temperature are increased, so that the normal operation and the service life of the air compressor are influenced, and the operation effect and the air supply quality of the post-treatment equipment are also influenced; meanwhile, heat is directly discharged through cooling systems such as air cooling or water cooling, energy is wasted, and environmental thermal pollution is caused.
For enterprises, the waste heat recovery technology of the air compressor is reasonably utilized, and the compression heat generated in the running process of the air compressor is recycled, so that the method is an important measure for saving energy, reducing consumption and generating economic benefit; meanwhile, the waste heat recovery of the air compressor can reduce the consumption of fossil fuel and CO2And the discharge amount of harmful gases protects the environment for our survival.
The utility model discloses, aim at establishing a centrifugal air compressor machine step waste heat recovery system, the compression heat that each level of centrifugal air compressor machine produced is retrieved to furthest, namely "waste heat".
SUMMERY OF THE UTILITY MODEL
The centrifugal air compressor mainly comprises two stages of compression and three stages of compression, the exhaust temperature of each stage of compression is close to 120-140 ℃, and the exhaust air can enter the next stage for recompression after being cooled by a cooler.
The utility model aims to construct a centrifugal air compressor step waste heat recovery system, which can recover the waste heat generated by each stage of the air compressor to the maximum extent and improve the total waste heat recovery amount; the air compressor has the advantages that the air compressor has positive effects on the service life of the air compressor and the quality of compressed air, enterprises can obtain heat as much as possible, the energy consumption is reduced, the operation cost is saved, and the economic benefit is improved.
For realizing the purpose of the utility model, the technical scheme of adoption is:
the utility model provides a centrifugal air compressor machine step waste heat recovery system, including centrifugal air compressor machine to and through high temperature compressed air entry with the compression heat regeneration desiccator that centrifugal air compressor machine's terminal high temperature compressed air export is connected, the cooling water wet return and the cooling water delivery pipe of compression heat regeneration desiccator are connected with recirculated cooling water system's return water mouth and water supply mouth, recirculated cooling water system's return water mouth and water supply mouth still connect centrifugal air compressor machine's oil cooler's cooling water wet return and cooling water delivery pipe: the water return port and the water supply port of the circulating cooling water system are further connected with the water supply port and the water return port of one side of the air compressor waste heat recovery skid block, the water return port of the other side of the air compressor waste heat recovery skid block is connected with the water supply port and the water supply port of one side of the bath water-water plate type heat exchanger, the water supply port of the intercooler of the centrifugal air compressor is connected with the water return port of one side of the bath water-water plate type heat exchanger, and the water supply port of the intercooler of the centrifugal air compressor is connected with the water return port of one side of the bath water-water plate type heat exchanger.
Preferably, the centrifugal air compressor is provided with a first-stage compressor, a first-stage intercooler, a second compressor, a second-stage intercooler and a third-stage compressor which are sequentially connected from the inlet side to the outlet side.
Preferably, the front end of the first-stage press is provided with an air inlet regulating valve, and the front end of the air inlet regulating valve is provided with an air inlet filter.
Preferably, the water supply pipelines of the first-stage intercooler and the second-stage intercooler are provided with self-operated temperature control valves.
Preferably, a protection plate replacing and high-level expansion water tank is arranged in the air compressor waste heat recovery skid block, and the high-level expansion water tank is installed on a water supply opening loop on one side of the protection plate replacing and is connected with a water replenishing pipeline of a water replenishing pump through a softening water tank for supplying water.
Preferably, the water supply port and the water return port on the changed side of the protection plate are correspondingly connected with the water supply port on one side of the bath water-water plate type heat exchanger and the water return port of the intercooler, and a variable frequency circulating water pump is arranged on a pipeline connected with the water return port of the intercooler.
The utility model discloses change the intercooler after the preceding two-stage compression of centrifugal air compressor machine for high-efficient gas-water heat exchanger, through the air water heat transfer, absorb the heat in the high temperature compressed air, prepare about 80 ℃ high temperature hot water, can regard as a heat source for preparation shower hot water or heating air conditioner return water etc..
Meanwhile, a post cooler after the third-stage compression of the centrifugal air compressor is eliminated, a compression heat regeneration dryer is configured, the high-temperature compressed air at the last stage of the air compressor is used for desorbing moisture in the drying agent, the energy consumption of the dryer in the heating regeneration process is reduced, and the waste heat of the centrifugal air compressor is utilized in a gradient manner.
Drawings
FIG. 1 is a process flow diagram of an air compression station that does not utilize waste heat as in the prior art;
FIG. 2 is a process flow diagram of an air compression station utilizing only final stage waste heat in the prior art;
FIG. 3 is a flow chart of the step waste heat recovery centrifuge body modification;
FIG. 4 is a process flow diagram of an air compression station with cascade waste heat recovery.
Detailed Description
And (3) a compression flow of a three-stage compression centrifuge: air is filtered by an air filter, enters a primary host machine, is compressed to 0.123MPa at the temperature of 128 ℃ for primary compression, and then enters a primary intercooler to exchange heat with cooling water. The compressed air is discharged from the first-stage intercooler, enters the second-stage main machine to be subjected to second compression, is compressed to 0.3483MPa, and enters the second-stage intercooler after the temperature reaches 125 ℃ to perform heat exchange with cooling water. The compressed air is discharged from the second-stage intercooler, enters the third-stage main machine, is compressed to 0.8MPa, reaches 124.5 ℃, and then enters the aftercooler to exchange heat with cooling water. The temperature of the compressed air after leaving the cooler is about the inlet water temperature of cooling water plus 10 ℃.
Before the centrifugal air compressor is not subjected to heat recovery transformation, the circulating water inlet and outlet temperatures of the three-stage cooler are both 32 ℃/40 ℃, and the circulating water inlet and outlet temperatures are directly connected with the cooling tower. The process flow is detailed in the process flow chart of the air compression station which does not utilize waste heat in the attached figure 1.
As mentioned above, the electric energy consumed for increasing the air potential energy only accounts for about 15% of the operating power, and 85% of the electric energy is converted into heat energy before the centrifugal machine is not subjected to heat recovery transformation and needs to be discharged into the atmosphere through the air compressor casing and the cooler. Theoretically, through the heat recovery technology, about 80% of electric energy consumed by the operation of the air compressor is converted into heat energy, and the heat energy can be recycled, namely about 60% of electric energy consumed by the operation of the air compressor can be used for waste heat utilization.
In general, in the centrifuge waste heat utilization in the prior art, a post cooler after the third-stage compression is omitted, a compression heat regeneration dryer is configured, and the moisture in the desiccant is desorbed by using the high-temperature gas at the last stage of an air compressor, so that the energy consumption in the heating regeneration process of the dryer is reduced. The process flow is detailed in a process flow chart of an air compression station only using final-stage waste heat utilization in the attached figure 2.
Because the compression heat regeneration dryer only utilizes the compression heat generated after the third-stage compression of the centrifuge, that is, only 1/3 maximum compression heat is utilized by waste heat in the operation process of the centrifuge, only about 60% × (1/3) ═ 20% of the electric energy consumed by the operation of the air compressor is recycled by waste heat, and the proportion is small.
Based on above reason, the utility model discloses aim at establishing a centrifugal air compressor step waste heat recovery system, all recycle in addition the compression heat that every grade of production of centrifugal air compressor machine, furthest provides waste heat recovery utilization. For a centrifugal air compressor, the waste heat of hot air after the preceding stage compression can be used for preparing shower hot water, and the waste heat of hot air after the final stage compression is used for compressing a heat regeneration dryer, so that the aim of utilizing the waste heat in a gradient manner is fulfilled.
The utility model discloses a centrifugal air compressor step waste heat recovery system is first order intercooler and second grade intercooler after the compression of preceding two-stage are changed into efficient gas-water heat exchanger, through gas-water heat transfer, absorbs the heat in the high temperature compressed air, prepares high temperature hot water about 80 ℃. Self-operated temperature control valves are arranged on circulating cooling water outlet pipelines of the first-stage cooler and the second-stage cooler of the centrifugal machine, the opening degree of the valves is automatically adjusted according to the outlet temperature of the coolers, and the outlet temperature of the circulating cooling water is guaranteed to be about 80 ℃ so as to be convenient for recycling; meanwhile, a variable-frequency circulating water pump is mounted on the circulating cooling water return header pipe, and the variable-frequency circulating water pump operates in a variable-frequency mode according to the opening degree of a self-operated temperature control valve and the change of water pressure and water temperature, so that the phenomenon that the safe operation of the air compressor is influenced because the temperature of a circulating water outlet is too high due to too small flow of circulating cooling water is avoided; and the problem that the circulating cooling water flow is too large to cause that the temperature of a circulating water outlet is too low and the circulating cooling water cannot be used as a heating medium to recycle waste heat is also avoided.
Further, set up air compressor machine waste heat recovery sled piece, in air compressor machine waste heat recovery sled piece, set up the protection shield and trade (plate heat exchanger), one side circulating water utilizes cooling tower fully to cool down, ensures that the opposite side carries out waste heat recovery's recirculated cooling water's return water temperature and does not exceed the water temperature value that the air compressor machine allowed to influence air compressor machine safe operation.
The heat recovery systems of all levels of the centrifugal air compressor run in parallel, and single-level or multi-level heat recovery can be flexibly selected in the running process. The high-temperature hot water with the temperature of about 80 ℃ prepared by waste heat recovery can be used as a primary heat source and used for preparing shower hot water or heating air conditioner backwater and the like through a water-water plate type heat exchanger.
Meanwhile, an after cooler after the original third-stage compression can be omitted, a compression heat regeneration dryer is configured, the high-temperature gas at the last stage of the air compressor is used for desorbing moisture in the drying agent, and the energy consumption of the dryer in the heating regeneration process is reduced.
The internal modification process of the centrifuge is shown in detail in the step waste heat recovery and utilization centrifuge body modification flow chart of figure 3; the details of the process flow of the air compression station refer to the process flow chart of the air compression station for recycling the cascade waste heat in the attached figure 4.
The utility model aims to ensure the stable operation of the air compressor and construct a centrifugal air compressor step waste heat recovery system on the premise of ensuring the quality of the compressed air, and recover the waste heat generated by each stage of the centrifugal air compressor in a grading way; about 60% of the electric energy consumed by the operation of the air compressor can be recycled by waste heat, and the ratio is large.
The centrifugal air compressor step waste heat recovery system can recover compression heat generated in the operation process of the air compressor to the maximum extent, reduce energy consumption, save operation cost and improve economic benefit.
Claims (6)
1. The utility model provides a centrifugal air compressor machine step waste heat recovery system, its characterized in that, including centrifugal air compressor machine to and through high temperature compressed air entry with the compression heat regeneration desiccator that centrifugal air compressor machine's terminal high temperature compressed air outlet is connected, the cooling water wet return and the cooling water delivery pipe of compression heat regeneration desiccator are connected with recirculated cooling water system's return water mouth and water supply mouth, recirculated cooling water system's return water mouth and water supply mouth still connect centrifugal air compressor machine's oil cooler's cooling water wet return and cooling water delivery pipe: the water return port and the water supply port of the circulating cooling water system are further connected with the water supply port and the water return port of one side of the air compressor waste heat recovery skid block, the water return port of the other side of the air compressor waste heat recovery skid block is connected with the water supply port and the water supply port of one side of the bath water-water plate type heat exchanger, the water supply port of the intercooler of the centrifugal air compressor is connected with the water return port of one side of the bath water-water plate type heat exchanger, and the water supply port of the intercooler of the centrifugal air compressor is connected with the water return port of one side of the bath water-water plate type heat exchanger.
2. The centrifugal air compressor step waste heat recovery system according to claim 1, wherein a first-stage compressor, a first-stage intercooler, a second compressor, a second-stage intercooler, and a third-stage compressor, which are connected in sequence, are sequentially disposed from an inlet side to an outlet side of the centrifugal air compressor.
3. The centrifugal air compressor step waste heat recovery system as claimed in claim 2, wherein an air inlet adjusting valve is arranged at the front end of the first-stage compressor, and an air inlet filter is arranged at the front end of the air inlet adjusting valve.
4. The centrifugal air compressor step waste heat recovery system as claimed in claim 2, wherein self-operated temperature control valves are provided on water supply lines of the first-stage intercooler and the second-stage intercooler.
5. The centrifugal air compressor step waste heat recovery system as claimed in claim 1, wherein a protection plate exchanger and a high expansion water tank are arranged in the air compressor waste heat recovery skid block, and the high expansion water tank is installed on a water supply port loop on one side of the protection plate exchanger and is connected with a softened water tank for supplying water through a water supply pipeline with a water supply pump.
6. The centrifugal air compressor step waste heat recovery system as claimed in claim 5, wherein a water supply port and a water return port on one side of the protection plate are connected with a water supply port on one side of the bath water-water plate heat exchanger and a water return port of the intercooler, respectively, and a variable frequency circulating water pump is provided on a pipeline connected with the water return port of the intercooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120604015.4U CN214499565U (en) | 2021-03-24 | 2021-03-24 | Centrifugal air compressor step waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120604015.4U CN214499565U (en) | 2021-03-24 | 2021-03-24 | Centrifugal air compressor step waste heat recovery system |
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| Publication Number | Publication Date |
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| CN214499565U true CN214499565U (en) | 2021-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120604015.4U Active CN214499565U (en) | 2021-03-24 | 2021-03-24 | Centrifugal air compressor step waste heat recovery system |
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2021
- 2021-03-24 CN CN202120604015.4U patent/CN214499565U/en active Active
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