CN219431903U - Ultralow concentration gas emission reduction and utilization system - Google Patents
Ultralow concentration gas emission reduction and utilization system Download PDFInfo
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- CN219431903U CN219431903U CN202320987124.8U CN202320987124U CN219431903U CN 219431903 U CN219431903 U CN 219431903U CN 202320987124 U CN202320987124 U CN 202320987124U CN 219431903 U CN219431903 U CN 219431903U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses an ultralow-concentration gas emission reduction and utilization system, and relates to the technical field of high-temperature flue gas heat utilization. The ultralow concentration gas emission reduction and utilization system comprises a regenerative oxidation device, a waste heat boiler, a chimney, a power generation subsystem, a heat exchange subsystem and a high-temperature water utilization subsystem; the backheating oxidation device is connected with a waste heat boiler, the waste heat boiler is respectively communicated with a chimney, a power generation subsystem and a heat exchange subsystem, and the heat exchange subsystem is in bidirectional communication with the high-temperature water utilization subsystem. The system organically combines common utilization ways of coal mine gas such as power generation, driving, heat supply, refrigeration and the like, can reasonably match energy supply and demand balance, realizes energy cascade utilization and can be utilized all the year round, and opens up a new method for utilizing the coal mine gas.
Description
Technical Field
The utility model relates to the technical field of high-temperature flue gas heat utilization, in particular to an ultralow-concentration gas emission reduction utilization system.
Background
The coal mine gas with ultralow concentration is subjected to emission reduction and utilization by adopting a regenerative oxidation technology, the coal mine gas with concentration below 3% is oxidized and decomposed into carbon dioxide and water, and heat is recovered for coal mine power and heat supply. In the emission reduction and utilization process, the heat source of the regenerative oxidation device is stable, and the power and heat load of the coal mine are greatly changed, so that the energy supply and the energy demand are not matched. The existing method for solving the problem of mismatching of energy supply and demand is to reduce the load of the regenerative oxidation device and even stop part of equipment, but the treatment mode has the problems that greenhouse gases cannot be treated and are discharged in a large amount, the regenerative oxidation device is frequently started and stopped, the equipment is frequently regulated, and the like, so that the method is very unfavorable for normal production and work of a coal mine.
Chinese patent publication No. CN1065000082a discloses a gas power generation system based on optimal utilization of saturated steam in a steel mill, which primarily heats condensation water by using low-temperature flue gas waste heat at the tail of a gas boiler, and the low-pressure steam-condensation water heat exchanger and the medium-pressure steam-condensation water heat exchanger respectively utilize the low-pressure saturated steam and the medium-pressure saturated steam in the steel mill to reheat the condensation water. However, the system does not have the problem of supply and demand mismatch, so that the system cannot be directly applied to the coal mine gas treatment technology.
Disclosure of Invention
In order to solve the technical problems, the utility model provides an ultralow-concentration gas emission reduction and utilization system, which recycles the oxidation heat of gas, meets the power requirements of coal mines and the heat supply requirements of production and living, and ensures the balance of supply and demand.
In order to achieve the technical purpose, the utility model adopts the following scheme:
the ultralow concentration gas emission reduction and utilization system comprises a regenerative oxidation device, a waste heat boiler, a chimney, a power generation subsystem, a heat exchange subsystem and a high-temperature water utilization subsystem; the backheating oxidation device is connected with a waste heat boiler, the waste heat boiler is respectively communicated with a chimney, a power generation subsystem and a heat exchange subsystem, and the heat exchange subsystem is in bidirectional communication with the high-temperature water utilization subsystem.
Compared with the prior art, the utility model has the beneficial effects that:
(1) Expanding the utilization path of the gas. The method organically combines common utilization ways of coal mine gas such as power generation, driving, heat supply, refrigeration and the like, can reasonably match energy supply and demand balance, realizes energy cascade utilization and can be utilized all the year round, and opens up a new method for utilizing the coal mine gas.
(2) The utilization rate of the ultralow-concentration gas emission reduction utilization system is improved. When the compressed air demand is reduced and the energy is surplus, the generator can be driven to generate power, the regenerative oxidation device still keeps working normally, and the ultralow-concentration gas of the coal mine can be continuously and stably utilized, so that the emission reduction target is realized.
(3) The reliability of the ultra-low concentration gas emission reduction utilization system is improved. In the ultralow-concentration gas emission reduction utilization system, the same equipment or different equipment has standby or alternative measures, and the system can not stop running due to the failure of one equipment. In addition, the requirements of heat supply, refrigeration, compressed air supply and the like can be fully ensured.
The preferable scheme of the utility model is as follows:
the power generation subsystem comprises a steam turbine, a coupler, an air compressor and a power generation electric integrated machine, wherein an inlet of the steam turbine is communicated with a hot steam outlet of the waste heat boiler, an outlet of the steam turbine is connected with the air compressor through the coupler, and the air compressor is connected with the power generation electric integrated machine through another coupler.
The heat exchange subsystem comprises a temperature and pressure reducing device, a condenser, a condensing water tank and a water supplementing pump, wherein a hot steam outlet of the waste heat boiler is communicated with the temperature and pressure reducing device, the temperature and pressure reducing device is communicated with an inlet of the condenser, an outlet of the condenser is communicated with the condensing water tank, the condensing water tank is communicated with the water supplementing pump, and the water supplementing pump is connected with the waste heat boiler.
The high-temperature water utilizing subsystem comprises a water separator, heat utilization equipment and a water collector, wherein the water separator is communicated with the heat utilization equipment, the heat utilization equipment is connected with the water collector, and the water collector is communicated with the condenser.
The heat utilization equipment comprises a bath water heat exchanger, a heat supply heat exchanger, a lithium bromide refrigerator and a cooling tower, wherein the water separator is respectively communicated with the bath water heat exchanger, the heat supply heat exchanger, the refrigerator and the cooling tower, and the bath water heat exchanger, the heat supply heat exchanger, the refrigerator and the cooling tower are all connected with the water collector.
The water heater also comprises a bath water supply pipe and a bath finished product water tank, wherein an inlet of the bath water heat exchanger is communicated with the bath water supply pipe, and an outlet of the bath water heat exchanger is communicated with the bath finished product water tank.
Drawings
FIG. 1 is a schematic diagram of a system for emission reduction and utilization of ultra-low concentration gas according to an embodiment of the present utility model;
marked in the figure as: 1. a regenerative oxidation device; 2. a waste heat boiler; 3. a chimney; 4. a condensate tank; 5. a water supplementing pump; 6. a steam turbine; 7. a condenser; 8. a temperature and pressure reducer; 9. a coupling; 10. an air compressor; 11. the power generation and electric integrated machine; 12. a water separator; 13. a bath water heat exchanger; 14. a water collector; 15. a circulating water pump; 16. a bath water regulating valve; 17. a bath finished product water tank; 18. a heat supply heat exchanger; 19. a refrigerating machine; 20. and (5) a cooling tower.
Detailed Description
The present utility model will be described in detail with reference to the following embodiments for a full understanding of the objects, features and effects of the present utility model, but the present utility model is not limited thereto.
As shown in fig. 1, the ultralow concentration gas emission reduction and utilization system provided by the utility model consists of a regenerative oxidation device 1, a waste heat boiler 2, a chimney 3, a power generation subsystem, a heat exchange subsystem, a high-temperature water utilization subsystem and the like, wherein the regenerative oxidation device 1 is connected with the waste heat boiler 2, the waste heat boiler 2 is respectively communicated with the chimney 3, the power generation subsystem and the heat exchange subsystem, and the heat exchange subsystem is in bidirectional communication with the high-temperature water utilization subsystem.
The power generation subsystem is composed of a steam turbine 6, a coupler 9, an air compressor 10, a power generation electric integrated machine 11 and the like, a high-temperature overheat outlet of the waste heat boiler 2 is communicated with the steam turbine 6 through a pipeline, an outlet of the steam turbine 6 is connected with the air compressor 10 through the coupler 9, and the air compressor 10 is connected with the power generation electric integrated machine 11 through another coupler. The generator (motor) is connected to a common shaft with the steam turbine 6 and the air compressor 10, and rotates at the same speed. The rotation speed of the common rotation shaft is determined by the output power of the air compressor 10, and the higher the output power of the air compressor 10 is, the faster the rotation speed is. The output of the turbine 6 is determined by the energy generated by the oxidation of the gas, and the more the energy generated by the oxidation of the gas is, the greater the output of the turbine 6 is.
The heat exchange subsystem is composed of a temperature and pressure reducing device 8, a condenser 7, a condensing water tank 4, a water supplementing pump 5 and the like, a high-temperature superheated steam outlet of the waste heat boiler 2 is further connected with the temperature and pressure reducing device 8, the temperature and pressure reducing device 8 is connected with a gas inlet of the condenser 7 through a pipeline, the gas inlet of the condenser 7 is further connected with the steam turbine 6, a low-temperature liquid outlet of the condenser 7 is communicated with the condensing water tank 4 through a pipeline, and the condensing water tank 4 is connected with a softened water inlet of the waste heat boiler 2 through the water supplementing pump 5.
The high-temperature water utilizing subsystem consists of a water separator 12, a water collector 14, a circulating water pump 15, heat utilization equipment and the like, wherein a high-temperature liquid outlet of the condenser 7 is connected with the water separator 12 through a pipeline, a plurality of different heat utilization equipment are connected in parallel on the water separator 12, low-temperature water return ports of the heat utilization equipment are connected with the water collector 14, and the water collector 14 is connected with a liquid inlet of the condenser 7 through the circulating water pump 15.
The heat utilization equipment is divided into four types of a bath water heat exchanger 13, a heat supply heat exchanger 18, a refrigerator 19 and a cooling tower 20, wherein the bath water heat exchanger 13 is a liquid-liquid heat exchanger, a low-temperature liquid inlet of the bath water heat exchanger 13 is connected with a bath water supply pipe, a bath water regulating valve 16 is arranged on the bath water supply pipe, a bath water outlet heated by the bath water heat exchanger 13 is connected with a bath finished product water tank 17, and the bath finished product water tank 17 supplies water for a bathhouse. The heat-supply heat exchanger 18 is also a liquid-liquid heat exchanger, and the pipeline to be heated of the heat-supply heat exchanger 18 is a heating water pipe.
The working process comprises the following steps:
the coal mine gas with ultralow concentration is fully oxidized in the regenerative oxidation device 1 and releases heat, high-temperature smoke with 800-850 ℃ is generated, and the high-temperature smoke enters the waste heat boiler 2. The high temperature flue gas exchanges heat with the softened water in the waste heat boiler 2, the temperature of the flue gas is reduced to below 150 ℃, and then the flue gas is discharged into the atmosphere through the chimney 3.
The ultra-low concentration gas emission reduction utilization system is provided with a plurality of sets of thermal oxidation devices 1, and similar devices are all in parallel connection and can be controlled by a control valve. The multiple sets of heat recovery oxidation devices 1 are mutually standby, so that stable operation of the ultralow-concentration gas emission reduction utilization system can be ensured.
The low-temperature condensed water is stored in a condensed water tank 4, is pressurized by a water supplementing pump 5 and enters the waste heat boiler 2, and absorbs heat contained in high-temperature flue gas to become high-temperature superheated steam. The high-temperature superheated steam enters the steam turbine 6 to push the steam turbine 6 to do work to become low-temperature exhaust steam, and the low-temperature exhaust steam is cooled by the condenser 7 and then becomes condensed water, and the condensed water returns to the condensing water tank 4.
When the output power of the steam turbine is equal to the power of the air compressor, the rotating speed of the common rotating shaft is unchanged, and the motor controller controls the power generation and electric integrated machine to do no work. When the output power of the steam turbine is larger than the power of the air compressor, the rotating speed of the common rotating shaft tends to rise, and the motor controller controls the power generation and electric integrated machine to serve as a generator to generate power by using the redundant power, so that the rotating speed of the common rotating shaft is kept unchanged. When the output power of the steam turbine is smaller than the power of the air compressor, the rotating speed of the common rotating shaft is about to be reduced, and the motor controller controls the power generation and electric integrated machine to work as a motor to supplement insufficient power, so that the rotating speed of the common rotating shaft is kept unchanged.
When the steam turbine 6 does not work, the high-temperature superheated steam generated by the waste heat boiler 2 enters the temperature and pressure reducer 8 and becomes low-temperature steam, and the low-temperature steam is cooled by the condenser 7 and becomes condensed water and returns to the condensed water tank 4. The arrangement of the temperature and pressure reducer 8 improves the stability of the ultralow concentration gas emission reduction and utilization system.
The low-temperature softened water from the water collector 14 is pressurized by the circulating water pump 15, enters the condenser 7 to absorb heat, becomes high-temperature softened water, and enters the water separator 12 for heating, refrigerating and other purposes.
When used for preparing the bathing hot water, the high temperature softened water from the water separator 12 enters the bathing water heat exchanger 13, and returns to the water collector 14 after releasing heat. Tap water enters the bath water heat exchanger 13 through the bath water regulating valve 16 to absorb heat and become bath water with moderate temperature, and the bath water is stored in the bath finished product water tank 17 for bath of bathhouses.
When used for heating, the high temperature softened water from the water separator 12 enters the heat supply heat exchanger 18, and after releasing heat, returns to the water collector 14. The heating backwater from the heating end enters the heat-supply heat exchanger 18 to absorb heat to become heating water supply with moderate temperature, and is sent to the heating end for heating.
When used for refrigeration, the high temperature softened water from the water separator 12 enters the refrigerator 19, and after heat release, returns to the water collector 14. The back water from the refrigerating end enters the refrigerator 19 to release heat into a moderate temperature refrigerating water supply, and is sent to the refrigerating end for air conditioning refrigeration.
When the hot water for bathing is prepared, heating, refrigerating is stopped or the heat is rich, the high-temperature softened water from the water separator 12 enters the cooling tower 20, and returns to the water collector 14 after heat release. The cooling tower 20 dissipates heat to the atmosphere to ensure that the low temperature softened water returning to the water trap 14 is at a moderate temperature. The arrangement of the cooling tower 20 improves the stability of the ultra-low concentration gas emission reduction and utilization system.
Finally, it should be noted that: the above list is only a preferred embodiment of the present utility model, and it is understood that those skilled in the art can make modifications and variations thereto, and it is intended that the present utility model be construed as the scope of the appended claims and their equivalents.
Claims (6)
1. An ultralow-concentration gas emission reduction and utilization system comprises a regenerative oxidation device, a waste heat boiler, a chimney, a power generation subsystem, a heat exchange subsystem and a high-temperature water utilization subsystem; the device is characterized in that the regenerative oxidation device is connected with a waste heat boiler, the waste heat boiler is respectively communicated with a chimney, a power generation subsystem and a heat exchange subsystem, and the heat exchange subsystem is in bidirectional communication with a high-temperature water utilization subsystem.
2. The ultra-low concentration gas emission reduction and utilization system according to claim 1, wherein the power generation subsystem comprises a steam turbine, a coupling, an air compressor and a power generation and electric integrated machine, an inlet of the steam turbine is communicated with a hot steam outlet of the waste heat boiler, an outlet of the steam turbine is connected with the air compressor through the coupling, and the air compressor is further connected with the power generation and electric integrated machine through another coupling.
3. The ultra-low concentration gas emission reduction and utilization system according to claim 2, wherein the heat exchange subsystem comprises a temperature and pressure reduction device, a condenser, a condensate tank and a water supplementing pump, a hot steam outlet of the waste heat boiler is communicated with the temperature and pressure reduction device, the temperature and pressure reduction device is communicated with an inlet of the condenser, and the inlet of the condenser is also connected with a steam turbine; an outlet of the condenser is communicated with a condensate water tank, the condensate water tank is communicated with a water supplementing pump, and the water supplementing pump is connected with the waste heat boiler.
4. The ultra-low concentration gas emission abatement and utilization system according to any one of claims 1-3, wherein the high temperature water utilization subsystem comprises a water separator, a heat utilization device and a water collector, the water separator is communicated with the heat utilization device, the heat utilization device is connected with the water collector, and the water collector is communicated with the condenser.
5. The ultra-low concentration gas emission reduction and utilization system according to claim 4, wherein the heat utilization device comprises a bath water heat exchanger, a heat supply heat exchanger, a refrigerator and a cooling tower, the water separator is respectively communicated with the bath water heat exchanger, the heat supply heat exchanger, the refrigerator and the cooling tower, and the bath water heat exchanger, the heat supply heat exchanger, the refrigerator and the cooling tower are respectively connected with the water collector.
6. The ultra-low concentration gas emission reduction and utilization system according to claim 5, further comprising a bath water supply pipe and a bath product water tank, wherein an inlet of the bath water heat exchanger is communicated with the bath water supply pipe, and an outlet of the bath water heat exchanger is communicated with the bath product water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320987124.8U CN219431903U (en) | 2023-04-27 | 2023-04-27 | Ultralow concentration gas emission reduction and utilization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320987124.8U CN219431903U (en) | 2023-04-27 | 2023-04-27 | Ultralow concentration gas emission reduction and utilization system |
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| CN219431903U true CN219431903U (en) | 2023-07-28 |
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| CN202320987124.8U Active CN219431903U (en) | 2023-04-27 | 2023-04-27 | Ultralow concentration gas emission reduction and utilization system |
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- 2023-04-27 CN CN202320987124.8U patent/CN219431903U/en active Active
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