A dry slag cleaning chain system

Abstract

The present invention provides a dry slag cleaning chain system, which relates to the technical field of boiler slag removal, comprising a cleaning chain, wherein the cleaning chain and a steel belt conveyor are arranged in a conveying bin, the steel belt conveyor is arranged above the cleaning chain for operation, one end of the conveying bin is arranged at the bottom of a furnace bottom ash hopper at the bottom of the boiler, a slag crusher is arranged at the other end of the conveying bin, the slag crusher is connected with a fine slag bin, a collecting ash hopper is arranged at the bottom of the conveying bin, a gas transport component is arranged at the bottom of the collecting ash hopper, the gas transport component is connected with the fine slag bin, a bag dust collector is arranged on the fine slag bin, slag generated by combustion of a coal-fired boiler contains slag blocks and fine ash, the slag blocks and fine ash enter the furnace bottom ash hopper, and a transportation mode combining the cleaning chain, the steel belt conveyor and the gas transport component reduces the weight of mechanical parts used in the process of transporting the slag to the fine slag bin, reduces the wear of the cleaning chain, and prevents the cleaning chain from being overloaded, tripped, decoupled or even broken due to excessive weight, and unable to operate.

Description

Technical Field

[0001] The invention relates to the technical field of boiler slagging, and in particular to a dry slagging cleaning chain system. Background Art

[0002] The boiler dry slag discharge system has the advantages of no water resource consumption, no wastewater discharge, high comprehensive utilization value of dry slag, and is beneficial to environmental protection, and is widely used in coal-fired power station boilers. The boiler dry slag discharge system is mainly composed of bottom ash hopper, steel belt conveyor, cleaning chain, slag crusher, intermediate slag bin, bucket elevator, slag bin and other equipment.

[0003] The cleaning chain is an important equipment in the dry slag removal system. It is installed at the bottom of the steel belt conveyor and is used to transport the fine ash that falls from the steel belt conveyor. Under normal circumstances, the cleaning chain can transport the fine ash that falls from the steel belt in time, but when burning high-ash economically applicable coal, the amount of slag increases, and the amount of fine ash that falls to the bottom of the steel belt conveyor and needs to be transported by the cleaning chain also increases greatly. Due to the limited conveying capacity of the cleaning chain, a large amount of fine ash transported from the horizontal section is easy to accumulate in the transition section and the lower part of the inclined section of the cleaning chain, causing the cleaning chain to wear more severely. In severe cases, it may cause the cleaning chain to overload and trip, decouple, or even break, and it cannot operate.

[0004] Therefore, in view of the above situation, it is urgent to develop a dry slag cleaning chain system to overcome the shortcomings in current practical applications. Summary of the invention

[0005] The invention provides a dry slag removal and cleaning chain system to solve the defects in the prior art.

[0006] The present invention provides a dry slag cleaning chain system, comprising: a cleaning chain, wherein the cleaning chain and a steel belt conveyor are arranged in a conveying bin, the steel belt conveyor is arranged above the cleaning chain for operation, one end of the conveying bin is arranged at the bottom of a furnace bottom ash hopper at the bottom of a boiler, a slag crusher is arranged at the other end of the conveying bin, the slag crusher is connected to the fine slag bin, a collection ash hopper is arranged at the bottom of the conveying bin, a gas transport conveying assembly is arranged at the bottom of the collection ash hopper, the gas transport conveying assembly is connected to the fine slag bin, and a bag dust collector is arranged on the fine slag bin.

[0007] Preferably, the steel belt conveyor and the cleaning chain are driven by a motor, and the cleaning chain and the steel belt conveyor are divided into a horizontal section and an inclined section. A discharge port 1 is provided in the conveying bin below the horizontal section of the cleaning chain, and a discharge port 2 is provided in the conveying bin below the end of the inclined section of the cleaning chain. The discharge port 2 is connected with the feed port of the slag crusher. An intermediate slag bin is provided at the bottom of the slag crusher, and the intermediate slag bin is connected with the fine slag bin through a bucket elevator. A manual valve is provided between the intermediate slag bin and the bucket elevator. A sieve plate is provided on the discharge port 1, and the feed port of the aggregate ash hopper is connected with the discharge port 1.

[0008] Preferably, a silo pump is provided below the aggregate ash hopper, a manual valve and a pneumatic valve are provided between the aggregate ash hopper and the silo pump, the bottom of the silo pump is connected to the air transport component, and a material level meter is provided on the silo pump.

[0009] Preferably, the gas transport component includes an ash conveying pipeline, one end of which is connected to an air intake source, the ash conveying pipeline is connected to a discharge port at the bottom of the silo pump, the bottom of the ash conveying pipeline between the silo pump and the air intake source is connected to an air distribution pipe, a plurality of air supply pipes are arranged on the air distribution pipe, the plurality of air supply pipes are connected to the ash conveying pipeline, a one-way air supply valve is arranged on the air supply pipe, and a pressure gauge is arranged on the ash conveying pipeline between the air distribution pipe and the air intake source.

[0010] Preferably, the air intake source is an air compressor, and the dry slag cleaning chain system further comprises:

[0011] Time detection module, used to measure the operation time cycle of ash conveying;

[0012] Pressure detection module, used to measure the local real-time atmospheric pressure;

[0013] Pressure detection module, used to measure the exhaust pressure of the air compressor;

[0014] Temperature detection module, used to measure the suction temperature of the air compressor;

[0015] Power detection module, used to measure the real-time power value of the air compressor;

[0016] A calculation module 1 is used to calculate the rated power value of the air compressor based on the operation time cycle of the ash conveying;

[0017] An alarm module, used for issuing an alarm;

[0018] A processing module, used for comparing the rated power value of the air compressor obtained by the calculation module 1 with the real-time power value of the air compressor;

[0019] Control module, when the real-time power value of the air compressor is greater than the rated power value of the air compressor, the control alarm module will sound an alarm and control the dry slag cleaning chain system to stop working for maintenance and adjustment. When the real-time power value of the air compressor is less than or equal to the rated power value of the air compressor, the dry slag cleaning chain system will work normally.

[0020] Preferably, the calculation module 1 calculates based on the following formula 1:

[0021]

[0022] S is the rated power value of the air compressor, K is the surplus coefficient of the motor in the air compressor, V is the effective volume of the silo pump, ρ1 is the density of fine ash, ρ2 is the density of high-speed gas in the ash conveying pipeline, τ is the ash-gas ratio, t is the operating time cycle of ash conveying, P1 is the local standard atmospheric pressure, P2 is the local real-time atmospheric pressure, ω is the air specific gravity at 0°C under standard conditions, T1 is the local annual average temperature, T2 is the suction temperature of the air compressor, n is the variable index of the gas compression process, E is other influencing constants of air, P3 is the exhaust pressure of the air compressor, δ1 is the mechanical efficiency of the air compressor, and δ2 is the efficiency of the motor in the air compressor.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The transportation method that combines the cleaning chain, steel belt conveyor and pneumatic conveying components reduces the weight of the mechanical parts used in the process of transporting ash to the fine slag bin, reduces the wear of the cleaning chain, and prevents the cleaning chain from being overloaded, tripped, decoupled or even broken due to excessive weight, making it unable to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention.

[0027] Reference numerals:

[0028] 1. Boiler; 2. Ash hopper at the bottom of the furnace; 3. Steel belt conveyor; 4. Cleaning chain; 5. Slag crusher; 6. Intermediate slag bin; 7. Bucket elevator; 8. Fine slag bin; 9. Bag filter; 10. Bin pump; 11. Ash conveying pipeline; 12. Air supply pipeline; 13. One-way air supply valve; 14. Aggregate ash hopper; 15. Manual valve; 16. Pneumatic valve; 17. Level meter; 18. Pressure gauge; 19. Conveying bin; 20. Discharge port 1; 21. Discharge port 2; 22. Air intake source; 23. Air distribution pipe. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides the following embodiments

[0032] Example 1

[0033] The embodiment of the present invention provides a dry slag cleaning chain system, such as Figure 1 As shown, it includes: a cleaning chain 4, the cleaning chain 4 and the steel belt conveyor 3 are arranged in a conveying bin 19, the steel belt conveyor 3 is arranged above the cleaning chain 4 and runs, one end of the conveying bin 19 is arranged at the bottom of the furnace bottom ash hopper 2 at the bottom of the boiler 1, and the other end of the conveying bin 19 is provided with a slag crusher 5, and the slag crusher 5 is connected to the fine slag bin 8, and the bottom of the conveying bin 19 is provided with an aggregate ash hopper 14, and the bottom of the aggregate ash hopper 14 is provided with an air transport component, and the air transport component is connected to the fine slag bin 8, and a bag dust collector 9 is provided on the fine slag bin 8.

[0034] The working principle and beneficial effects of the above technical solution are as follows: the conveying bin 19 limits the cleaning chain 4 and the steel belt conveyor 3, the ash generated by the combustion of the coal-fired boiler 1 contains slag blocks and fine ash, the slag blocks and fine ash enter the ash hopper 2 at the bottom of the furnace, and fall from the bottom ash hopper to the steel belt conveyor 3 in the conveying bin 19 to be transported away, the large slag blocks are transferred to the slag crusher 5 to be crushed into fine ash, and then transferred to the fine slag bin 8 to be stored, the fine ash in the transported ash leaks out from the gaps on the steel belt conveyor 3, and a part of the fine ash is transferred to the slag crusher 5 by the cleaning chain 4 and further crushed into fine ash, and then transferred to the fine slag bin 8 to be stored, and the leaked Another part of the fine ash is transferred by the cleaning chain 4 to the aggregate ash hopper 14 and is transferred to the fine slag bin 8 for storage through the air transport component, ensuring that the ash in the fine slag bin 8 is all small-volume fine ash. The fine ash transferred to the fine slag bin 8 is dust-removed and purified by the bag dust collector 9 to prevent excessive ash from polluting the environment. The transportation method combining the cleaning chain 4, the steel belt conveyor 3 and the air transport component has a weight-reducing effect on the mechanical parts used in the process of transporting the ash to the fine slag bin 8, reduces the wear of the cleaning chain 4, and prevents the cleaning chain 4 from being overloaded, tripped, decoupled or even broken due to excessive weight, making it unable to operate.

[0035] Example 2

[0036] On the basis of Example 1, Figure 1 As shown, the steel belt conveyor 3 and the cleaning chain 4 are driven by a motor, and the cleaning chain 4 and the steel belt conveyor 3 are divided into a horizontal section and an inclined section. A discharge port 20 is provided in the conveying bin 19 below the horizontal section of the cleaning chain 4, and a discharge port 21 is provided in the conveying bin 19 below the end of the inclined section of the cleaning chain 4. The discharge port 21 is connected with the feed port of the slag crusher 5. An intermediate slag bin 6 is provided at the bottom of the slag crusher 5. The intermediate slag bin 6 is connected with the fine slag bin 8 through a bucket elevator 7. A manual valve 15 is provided between the intermediate slag bin 6 and the bucket elevator 7. A sieve plate is provided on the discharge port 20, and the feed port of the aggregate ash hopper 14 is connected with the discharge port 20.

[0037] The working principle and beneficial effects of the above technical solution are as follows: the motor drives the operation of the steel belt conveyor 3 and the cleaning chain 4, and the ash transportation of the steel belt conveyor 3 and the cleaning chain 4 can be controlled by controlling the motor. The fine ash falling from the ash hopper 2 at the bottom of the furnace passes through the steel belt conveyor 3 and falls to the bottom surface of the conveying bin 19, and is swept by the cleaning chain 4 to the discharge port 20 for screening by the sieve plate. The fine ash screened by the sieve plate falls into the aggregate hopper 14 below. The steel belt conveyor 3 and the cleaning chain 4 respectively transport the large slag blocks and a part of the fine ash to the high part of the conveying bin 19 through the horizontal section and the inclined section, and then fall from the discharge port 21 of the conveying bin 19 to the slag crusher 5 for further crushing into fine ash and then fall into the intermediate slag bin 6 for temporary storage. The bucket elevator 7 then transports the fine ash in the intermediate slag bin 6 to the fine slag bin 8 for storage. The manual valve 15 controls whether the fine ash needs to be transported from the intermediate slag bin 6 to the fine slag bin 8, which facilitates the control of the ash transportation process.

[0038] Example 3

[0039] On the basis of Example 2, Figure 1 As shown, a silo pump 10 is arranged below the aggregate ash hopper 14, a manual valve 15 and a pneumatic valve 16 are arranged between the aggregate ash hopper 14 and the silo pump 10, the bottom of the silo pump 10 is connected to the air transport component, and a material level meter 17 is arranged on the silo pump 10.

[0040] The working principle and beneficial effects of the above technical solution are as follows: the sieved fine ash in the aggregate ash hopper 14 is transported to the silo pump 10, which prevents the slag particles in the fine ash from clogging the silo pump 10. The dual design of the manual valve 15 and the pneumatic valve 16 performs dual control on the transportation of the fine ash in the aggregate ash hopper 14 to the silo pump 10, which greatly ensures the safety and controllability of the equipment. The level meter 17 arranged on the silo pump 10 detects the amount of fine ash in the silo pump 10, and the amount of fine ash in the silo pump 10 is detected at all times to detect the occurrence of blockages and faults in time.

[0041] Example 4

[0042] On the basis of Example 3, Figure 1 As shown, the gas transport component includes an ash conveying pipeline 11, one end of which is connected to an air intake source 22, and the ash conveying pipeline 11 is connected to a discharge port at the bottom of the silo pump 10, and the bottom of the ash conveying pipeline 11 between the silo pump 10 and the air intake source 22 is connected to an air distribution pipe 23, and a plurality of air supply pipelines 12 are arranged on the air distribution pipe 23, and a plurality of air supply pipelines 12 are connected to the ash conveying pipeline 11, a one-way air supply valve 13 is arranged on the air supply pipeline 12, and a pressure gauge 18 is arranged on the ash conveying pipeline 11 between the air distribution pipe 23 and the air intake source 22.

[0043] The working principle and beneficial effects of the above technical scheme are as follows: the fine ash falling from the silo pump 10 enters the ash conveying pipe 11, and the air intake source 22 provides high-speed gas for the ash conveying pipe 11 and the air distribution pipe 23. The air distribution pipe 23 introduces the gas into multiple air supply pipes 12, and the high-speed gas carries the entering fine ash in the ash conveying pipe 11 to the fine slag bin 8. In order to prevent blockage in the ash conveying pipe 11, an air supply pipe 12 for air supply is installed every one meter. When blockage occurs, the one-way air supply valve 13 on the previous air supply pipe 12 at the blocked position is opened to increase the gas volume at the blocked position in a targeted manner, thereby unblocking the blocked position and ensuring that the fine ash is smoothly transported to the fine slag bin 8. The pressure gauge 18 arranged on the ash conveying pipe 11 displays the pressure in the ash conveying pipe 11 in real time. When blockage occurs in the ash conveying pipe 11, the air pressure display changes, and the one-way air supply valve 13 can be opened in time to unblock the ash conveying pipe 11.

[0044] Example 5

[0045] On the basis of Example 4, the air intake source 22 is an air compressor, and the dry slag cleaning chain 4 system further includes:

[0046] Time detection module, used to measure the operation time cycle of ash conveying;

[0047] Pressure detection module, used to measure the local real-time atmospheric pressure;

[0048] Pressure detection module, used to measure the exhaust pressure of the air compressor;

[0049] Temperature detection module, used to measure the suction temperature of the air compressor;

[0050] Power detection module, used to measure the real-time power value of the air compressor;

[0051] A calculation module 1 is used to calculate the rated power value of the air compressor based on the operation time cycle of the ash conveying;

[0052] An alarm module, used for issuing an alarm;

[0053] A processing module, used for comparing the rated power value of the air compressor obtained by the calculation module 1 with the real-time power value of the air compressor;

[0054] Control module, when the real-time power value of the air compressor is greater than the rated power value of the air compressor, the control alarm module will sound an alarm and control the dry slag cleaning chain 4 system to stop working for maintenance and adjustment. When the real-time power value of the air compressor is less than or equal to the rated power value of the air compressor, the dry slag cleaning chain 4 system will work normally.

[0055] The working principle and beneficial effects of the above technical scheme are as follows: in this embodiment, the air intake source 22 is an air compressor, which provides high-pressure air for the ash conveying pipeline 11. The time detection module in the dry slag cleaning chain 4 system measures the operating time period of ash conveying, the pressure detection module measures the local real-time atmospheric pressure, the pressure detection module measures the exhaust pressure of the air compressor, the temperature detection module measures the suction temperature of the air compressor, the power detection module measures the real-time power value of the air compressor, the calculation module 1 calculates the rated power value of the air compressor based on the operating time period of ash conveying, the alarm module is used to issue an alarm, and the processing module compares and processes the rated power value of the air compressor obtained by the calculation module 1 with the real-time power value of the air compressor. When the real-time power value of the air compressor is greater than the rated power value of the air compressor, the control module controls the alarm module to issue an alarm and at the same time controls the dry slag cleaning chain 4 system to stop working for maintenance and adjustment. When the real-time power value of the air compressor is less than or equal to the rated power value of the air compressor, the dry slag cleaning chain 4 system works normally.

[0056] Example 6

[0057] Based on Example 5, the calculation module 1 calculates based on the following formula 1:

[0058]

[0059] S is the rated power value of the air compressor, K is the surplus coefficient of the motor in the air compressor, V is the effective volume of the silo pump 10, ρ1 is the density of fine ash, ρ2 is the density of the high-speed gas in the ash conveying pipeline 11, τ is the ash-gas ratio, t is the operating time cycle of the ash conveying, P1 is the local standard atmospheric pressure, P2 is the local real-time atmospheric pressure, ω is the air specific gravity at 0°C under standard conditions, T1 is the local annual average temperature, T2 is the suction temperature of the air compressor, n is the variable index of the gas compression process, E is other influencing constants of air, P3 is the exhaust pressure of the air compressor, δ1 is the mechanical efficiency of the air compressor, and δ2 is the efficiency of the motor in the air compressor.

[0060] The working principle and beneficial effects of the above technical solution are: Calculate the gas consumption of the silo pump by Calculate the rated steam consumption of the air compressor conveying system by Calculate the rated power value of the air compressor. When the real-time power value of the air compressor is greater than the rated power value of the air compressor, the control module controls the alarm module to sound an alarm and at the same time controls the dry slag cleaning chain system to stop working for maintenance and adjustment. When the real-time power value of the air compressor is less than or equal to the rated power value of the air compressor, the dry slag cleaning chain system works normally.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dry slag cleaning chain system, characterized in that: include: A cleaning chain (4), the cleaning chain (4) and the steel belt conveyor (3) are arranged in a conveying bin (19), the steel belt conveyor (3) is arranged above the cleaning chain (4) and runs, one end of the conveying bin (19) is arranged at the bottom of the furnace bottom ash hopper (2) at the bottom of the boiler (1), the other end of the conveying bin (19) is provided with a slag crusher (5), the slag crusher (5) is connected to the fine slag bin (8), the bottom of the conveying bin (19) is provided with an aggregate ash hopper (14), the bottom of the aggregate ash hopper (14) is provided with an air transport assembly, the air transport assembly is connected to the fine slag bin (8), and a bag dust collector (9) is provided on the fine slag bin (8).

2. A dry slag cleaning chain system according to claim 1, characterized in that: The steel belt conveyor (3) and the cleaning chain (4) are driven by a motor. The cleaning chain (4) and the steel belt conveyor (3) are divided into a horizontal section and an inclined section. A discharge port 1 (20) is provided in the conveying bin (19) below the horizontal section of the cleaning chain (4). A discharge port 2 (21) is provided in the conveying bin (19) below the end of the inclined section of the cleaning chain (4). The discharge port 2 (21) is connected to the feed port of the slag crusher (5). An intermediate slag bin (6) is provided at the bottom of the slag crusher (5). The intermediate slag bin (6) is connected to the fine slag bin (8) through a bucket elevator (7). A manual valve (15) is provided between the intermediate slag bin (6) and the bucket elevator (7). A sieve plate is provided on the discharge port 1 (20). The feed port of the aggregate ash hopper (14) is connected to the discharge port 1 (20).

3. A dry slag cleaning chain system according to claim 2, characterized in that: A silo pump (10) is arranged below the aggregate ash hopper (14), a manual valve (15) and a pneumatic valve (16) are arranged between the aggregate ash hopper (14) and the silo pump (10), the bottom of the silo pump (10) is connected to the air transport component, and a material level meter (17) is arranged on the silo pump (10).

4. A dry slag cleaning chain system according to claim 3, characterized in that: The gas transport component comprises an ash conveying pipeline (11), one end of which is connected to an air intake source (22), the ash conveying pipeline (11) is connected to a discharge port at the bottom of the silo pump (10), the bottom of the ash conveying pipeline (11) between the silo pump (10) and the air intake source (22) is connected to an air distribution pipe (23), a plurality of air supply pipelines (12) are arranged on the air distribution pipe (23), the plurality of air supply pipelines (12) are connected to the ash conveying pipeline (11), a one-way air supply valve (13) is arranged on the air supply pipeline (12), and a pressure gauge (18) is arranged on the ash conveying pipeline (11) between the air distribution pipe (23) and the air intake source (22).

5. A dry slag cleaning chain system according to claim 4, characterized in that: The air intake source (22) is an air compressor, and the dry slag cleaning chain system further comprises: Time detection module, used to measure the operation time cycle of ash conveying; Pressure detection module, used to measure the local real-time atmospheric pressure; Pressure detection module, used to measure the exhaust pressure of the air compressor; Temperature detection module, used to measure the suction temperature of the air compressor; Power detection module, used to measure the real-time power value of the air compressor; A calculation module 1 is used to calculate the rated power value of the air compressor based on the operation time cycle of the ash conveying; An alarm module, used for issuing an alarm; A processing module, used for comparing the rated power value of the air compressor obtained by the calculation module 1 with the real-time power value of the air compressor; The control module, when the real-time power value of the air compressor is greater than the rated power value of the air compressor, the control alarm module sends out an alarm and controls the dry slag cleaning chain (4) system to stop working for inspection and adjustment; when the real-time power value of the air compressor is less than or equal to the rated power value of the air compressor, the dry slag cleaning chain (4) system works normally.

6. A dry slag cleaning chain system according to claim 5, characterized in that: The calculation module 1 calculates based on the following formula 1: S is the rated power value of the air compressor, K is the surplus coefficient of the motor in the air compressor, V is the effective volume of the silo pump (10), ρ1 is the density of fine ash, ρ2 is the density of the high-speed gas in the ash conveying pipeline (11), τ is the ash-gas ratio, t is the operating time cycle of the ash conveying, P1 is the local standard atmospheric pressure, P2 is the local real-time atmospheric pressure, ω is the air specific gravity at 0°C under standard conditions, T1 is the local annual average temperature, T2 is the suction temperature of the air compressor, n is the variable index of the gas compression process, E is other influencing constants of air, P3 is the exhaust pressure of the air compressor, δ1 is the mechanical efficiency of the air compressor, and δ2 is the efficiency of the motor in the air compressor.

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