CN209797884U - High-temperature gas heat recycling system - Google Patents
High-temperature gas heat recycling system Download PDFInfo
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- CN209797884U CN209797884U CN201822119730.XU CN201822119730U CN209797884U CN 209797884 U CN209797884 U CN 209797884U CN 201822119730 U CN201822119730 U CN 201822119730U CN 209797884 U CN209797884 U CN 209797884U
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- 238000004064 recycling Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 116
- 230000005855 radiation Effects 0.000 claims abstract description 68
- 239000002699 waste material Substances 0.000 claims abstract description 65
- 239000011229 interlayer Substances 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000010791 quenching Methods 0.000 claims abstract description 10
- 230000000171 quenching effect Effects 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 64
- 230000001105 regulatory effect Effects 0.000 claims description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 239000012495 reaction gas Substances 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 239000006227 byproduct Substances 0.000 abstract description 2
- 238000002309 gasification Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model provides a high-temperature gas heat recycling system, which comprises a gas generator and a steam pocket, wherein the gas generator comprises a reaction section, a waste boiler section and a quenching section, the waste boiler section comprises a shell and a radiation waste boiler, the radiation waste boiler is positioned in the shell, and an interlayer is arranged between the radiation waste boiler and the shell; the waste radiation boiler comprises a water-cooled wall, a radiation screen is arranged on the inner wall of the water-cooled wall, and the inlet ends of the water-cooled wall and the radiation screen are respectively connected with the steam drum through a water-cooled wall pipeline and a radiation screen pipeline; the inlet ends of the upper coil and the lower coil are respectively connected with an upper coil removing pipeline and a lower coil removing pipeline from a boiler water pipe network, and the outlet ends of the water-cooled wall and the radiation screen are respectively connected with the steam drum through a water-cooled wall outlet pipeline and a radiation screen outlet pipeline. The utility model discloses a radiation waste boiler utilizes the sensible heat that the high-temperature gas was retrieved to water-cooling wall radiation heat transfer mode, byproduct saturated steam to improve energy utilization efficiency.
Description
Technical Field
The utility model relates to a high temperature sensible heat recovery device of high temperature gas, specifically speaking are high temperature gas heat recovery and utilization system.
background
Coal gasification technologies are generally classified into chilling process entrained flow bed gasification technologies and waste boiler process entrained flow bed gasification technologies according to processes. The main differences between the waste-pot type and the chilling type gasification devices are as follows: the sensible heat contained in the high-temperature raw gas is recycled in different modes. In a quench gasifier, crude gas at a temperature of up to 1370 ℃ is directly quenched with water in a quench chamber to 220-260 ℃. Obviously, much of the sensible heat carried by the raw gas is lost by the quench chamber, which loses a portion of the physical sensible heat during the quench, which is approximately equal to 10% of the lower calorific value. The gasification furnace with waste boiler flow is also called as full heat energy recovery type gasification furnace, it can reduce the temperature of crude gas from 1370 deg.C to about 800 deg.C by radiation cooler and convection cooler to heat boiler feed water to produce a considerable amount of high pressure saturated steam, which is used by steam turbine after being overheated, thus, the efficiency of hot gas can be improved. According to the introduction of relevant information, the gasification device adopting the waste boiler process has the comprehensive energy consumption lower by about 10 percent compared with the gasification device adopting the chilling process.
However, when the waste boiler type gasification device is used for recovering heat, the working efficiency is reduced because the design scheme is not reasonable and the auxiliary system is not coordinated, and although a certain amount of steam can be recovered and the crude gas combusted in the gasification furnace is subjected to heat exchange and temperature reduction to a certain degree, the effect of recovering heat by the waste boiler type gasification device cannot be exerted to the maximum.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the deficiencies of the prior art and providing a high-temperature gas heat recycling system.
The utility model provides a technical scheme that its technical problem adopted is:
A high-temperature gas heat recycling system comprises a gas generator and a steam pocket, wherein the gas generator comprises a reaction section, a waste boiler section and a quenching section, the waste boiler section comprises a shell and a radiation waste boiler, the radiation waste boiler is positioned in the shell, and an interlayer is arranged between the radiation waste boiler and the shell; the radiant waste boiler comprises a water-cooled wall, an upper conical section water-cooled wall, a middle straight-barrel section water-cooled wall and a lower conical section water-cooled wall are sequentially communicated with the water-cooled wall from top to bottom, an upper inlet section and a lower outlet section are respectively arranged at the upper end of the upper conical section water-cooled wall and the lower end of the lower conical section water-cooled wall, and an upper coil pipe and a lower coil pipe are respectively arranged on the outer sides of the upper inlet section and the lower outlet section; the inner wall of the water-cooled wall of the middle straight-tube section is provided with a radiation screen, which is characterized in that: the inlet ends of the water-cooled wall and the radiation screen are respectively connected with a first lower water supply collecting tank and a second lower water supply collecting tank, and the first lower water supply collecting tank and the second lower water supply collecting tank are respectively connected with the steam drum through a water-cooled wall pipeline and a radiation screen pipeline; the inlet ends of the upper coil pipe and the lower coil pipe are respectively connected with an upper coil pipe removing pipeline and a lower coil pipe removing pipeline from a boiler water pipe network, the outlet ends of the water-cooled wall and the radiation screen are respectively connected with a first upper return water collecting tank and a second upper return water collecting tank, the first upper return water collecting tank and the second upper return water collecting tank are respectively connected with the steam drum through a water-cooled wall outlet pipeline and a radiation screen outlet pipeline, and the outlet ends of the upper coil pipe and the lower coil pipe are respectively connected with the steam drum through an upper coil pipe outlet pipeline and a lower coil pipe outlet pipeline.
Preferably, the first upper return water collecting tank and the second upper return water collecting tank are positioned at the upper end of the water-cooled wall of the middle straight-tube section, and the first lower water supply collecting tank and the second lower water supply collecting tank are positioned at the lower end of the water-cooled wall of the middle straight-tube section; the first upper return water collecting tank and the second upper return water collecting tank are communicated with the outside through a discharge pipe; and the first lower water supply and collection tank and the second lower water supply and collection tank discharge sewage through a drain pipe.
Further, the waste boiler section is communicated with high-pressure nitrogen and CO through a first connecting pipeline2A pipeline is connected with a reaction gas pipeline, and the first connecting pipeline is communicated with the interlayer between the shell and the water wall; the chilling section is connected with a reaction gas outlet pipeline; the above-mentionedThe water removal wall pipeline and the radiation removal screen pipeline are connected with a medium-pressure steam pipeline.
Further, a protective gas pressure regulating valve is arranged on the first connecting pipeline, a water-cooled wall pressure difference meter is connected to the outside of the waste boiler section and used for detecting the pressure difference between the inside of the waste boiler section and an interlayer between the shell and the water-cooled wall, and the water-cooled wall pressure difference meter is electrically connected with the protective gas pressure regulating valve and forms a control loop; the waste boiler section is also connected with an upper inlet pressure difference meter and a lower outlet pressure difference meter outside, the upper inlet pressure difference meter is used for detecting the pressure difference between the waste boiler section and the reaction section, the lower outlet pressure difference meter is used for detecting the pressure difference between the waste boiler section and the high-temperature gas outlet, and a gas generator pressure regulating valve is arranged on the reaction gas outlet pipe.
Preferably, the steam drum is connected with a steam drum removing pipeline from a boiler water pipe network, the steam drum removing pipeline is provided with a steam drum liquid level regulating valve and a boiler water supply flow meter, the steam drum is provided with at least 3 steam drum liquid level meters, and a multiple redundancy mode is adopted; the steam pocket passes through the steam pocket discharge pipeline and the steam line connection of second connecting line and intercommunication, be equipped with steam pocket discharge pipeline pressure regulating valve on the steam pocket discharge pipeline, be equipped with steam pipeline pressure regulating valve and steam flowmeter on the steam pipeline, steam pocket level gauge, steam flowmeter, boiler are given the water flowmeter and are respectively with steam pocket level regulating valve electric connection to form control loop, carry out three momentum and adjust, control steam pocket liquid level and steam output.
Furthermore, a pressure gauge is arranged on the second connecting pipeline and is electrically connected with the steam drum discharge pipeline pressure regulating valve and the steam pipeline pressure regulating valve respectively.
Preferably, a plurality of first thermocouples are inserted into an interlayer between the shell and the radiation waste boiler, and a plurality of second thermocouples are arranged on the surface of the shell; and the second thermocouple is positioned on the surface of the shell corresponding to the water-cooled wall of the upper conical section and the water-cooled wall of the middle straight-tube section.
The utility model discloses a radiation waste boiler utilizes the water-cooling wall radiation heat transfer mode to retrieve the sensible heat that high temperature closed gas, and the byproduct steam to improve energy utilization efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a connection diagram of the high-temperature gas heat recycling system of the present invention.
Fig. 2 is an enlarged view of the internal structure of the waste pot section of the present invention.
In the figure: 1. a reaction section; 2. a waste boiler section; 201. an upper cone section water-cooled wall; 202. a water-cooled wall of the middle straight-tube section; 203. a lower cone section water-cooled wall; 204. a radiation screen; 205. an upper inlet section; 206. a lower outlet section; 207. feeding a coil pipe; 208. a coil pipe is arranged; 209. a first lower water supply header tank; 210. a second lower feed water header tank; 211. a first upper return water header; 212. a second upper return water header tank; 3. a quenching section; 4. a de-waterwall pipeline; 5. a de-radiative screen line; 6. removing the coil pipe pipeline; 7. removing a coil pipeline; 8. a water cooled wall outlet pipeline; 9. a radiation screen outlet line; 10. an upper disc pipe outlet pipeline; 11. discharging a coil pipeline; 12. a header discharge pipe on the water wall; 13. a header drain on the radiant screen; 14. an exhaust gas blow-down pipe; 15. a drain pipe of a water wall lower header; 16. a drain pipe of a lower collection box of the radiation screen; 17. high pressure nitrogen, CO2A pipeline; 18. a reactant gas line; 19. a medium pressure steam line; 20. a reaction gas outlet pipe; 21. a first thermocouple; 22. a second thermocouple; 23. a water wall pressure difference meter; 24. an upper inlet differential pressure gauge; 25. a lower outlet differential pressure gauge; 26. a drum discharge line; 27. a drum discharge line pressure regulating valve; 28. a steam line; 29. a steam line pressure regulating valve; 30. a drum removal line; 31. a drum liquid level regulating valve; 32. a gas generator pressure regulating valve; 33. a protective gas pressure regulating valve; 34. a steam flow meter; 35. a boiler feed water flow meter; 36. a drum level gauge; 37. and (4) a steam drum.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and 2, a high-temperature gas heat recycling system comprises a gas generator and a steam drum 37, wherein the gas generator comprises a reaction section 1, a waste boiler section 2 and a chilling section 3, the waste boiler section 2 comprises a shell and a radiation waste boiler, and the radiation waste boiler is positioned in the shell and provided with an interlayer with the shell; the radiation waste boiler comprises a water-cooled wall, an upper conical section water-cooled wall 201, a middle straight-barrel section water-cooled wall 202 and a lower conical section water-cooled wall 203, wherein the water-cooled wall is sequentially communicated from top to bottom, the upper end of the upper conical section water-cooled wall 201 and the lower end of the lower conical section water-cooled wall 203 are respectively provided with an upper inlet section 205 and a lower outlet section 206, and the outer sides of the upper inlet section 205 and the lower outlet section 206 are respectively provided with an upper coil 207 and a lower coil 208; the inner wall of the water-cooled wall 202 of the middle straight cylinder section is provided with a radiation screen 204, the inlet ends of the water-cooled wall and the radiation screen 204 are respectively connected with a first lower feed water collecting tank 209 and a second lower feed water collecting tank 210, and the first lower feed water collecting tank 209 and the second lower feed water collecting tank 210 are respectively connected with the steam drum 37 through a water-cooled wall removing pipeline 4 and a radiation screen removing pipeline 5; the inlet ends of the upper coil 207 and the lower coil 208 are respectively connected with an upper coil pipe removing pipeline 6 and a lower coil pipe removing pipeline 7 from a boiler water pipe network, the outlet ends of the water-cooled wall and the radiation screen 204 are respectively connected with a first upper return water collecting tank 211 and a second upper return water collecting tank 212, the first upper return water collecting tank 211 and the second upper return water collecting tank 212 are respectively connected with the steam drum through a water outlet wall pipeline 8 and a radiation screen outlet pipeline 9, and the outlet ends of the upper coil 207 and the lower coil 208 are respectively connected with the steam drum 37 through an upper coil pipe outlet pipeline 10 and a lower coil pipe outlet pipeline 11.
The first upper backwater collecting tank 211 and the second upper backwater collecting tank 212 are positioned at the upper end of the middle straight cylinder section water-cooled wall 202, and the first lower feed water collecting tank 209 and the second lower feed water collecting tank 210 are positioned at the lower end of the middle straight cylinder section water-cooled wall 202; the first upper return water collecting tank 211 and the second upper return water collecting tank 212 are communicated with the outside through a discharge pipe; the first and second lower feed water header tanks 209 and 210 are drained through drain pipes.
boiler water supplies water to the upper conical section water-cooled wall 201, the lower conical section water-cooled wall 203 and the middle straight-tube section water-cooled wall 202 through a water-removing cold wall pipeline 4 through a steam drum 37, high-pressure boiler water with the temperature lower than the saturation temperature is directly introduced into the upper coil 207 and the lower coil 208 through an upper coil removing pipeline 6 and a lower coil removing pipeline 7 respectively, the upper part and the lower part are controlled respectively, high-temperature gas heat is recovered through radiation heat exchange, a steam-water mixture heated in the upper conical section water-cooled wall 201, the lower conical section water-cooled wall 203, the middle straight-tube section water-cooled wall 202, the upper coil 207 and the lower coil 208 returns to the steam drum 37, after heat exchange is carried out on the upper conical section water-cooled wall 201, the lower conical section water-cooled wall 203, the middle straight-tube section water-cooled wall 202, the upper coil 207. The working medium of the radiation waste boiler adopts natural circulation.
The discharge pipe comprises a water-cooled wall upper header discharge pipe 12 and a radiation screen upper header discharge pipe 13, the water-cooled wall upper header discharge pipe 12 and the radiation screen upper header discharge pipe 13 are connected with a discharge gas blow-down pipe 14, when water is injected or started, a valve of the discharge gas blow-down pipe 14 is opened, air and non-condensable gas in the radiation waste boiler are discharged, and after the system normally operates, the valve of the discharge gas blow-down pipe 14 is in a closed state. The drain pipe comprises a drain pipe 15 of a lower header of a water wall and a drain pipe 16 of a lower header of a radiation screen, and can drain liquid through a drain opening when parking and overhauling are carried out.
The waste boiler section 2 is communicated with high-pressure nitrogen and CO through a first connecting pipeline2A line 17 is connected with a reaction gas line 18, and the first connecting line is communicated with the interlayer between the shell and the water wall; the quenching section 3 is connected with a reaction gas outlet pipe 20; the water-cooling wall pipeline 4 and the radiation screen pipeline 5 are connected with a medium-pressure steam pipeline 19, and medium-pressure steam is introduced into the water supply pipeline to provide kinetic energy for heating the water supply.
The interlayer between the water-cooled wall and the shell is filled with protective gas which is treated by high-pressure nitrogen and CO2Line 17 is fed with high pressure nitrogen or CO2Or the reaction gas or other non-flammable explosive gas can be introduced through the reaction gas line 18 to serve as the gas for protecting the interlayer. The control scheme is that the pressure difference between the inside of the waste boiler section and the interlayer is measured at the upper part of the waste boiler section, and the measurement and the protective gas pressure regulating valve 33 form a control loop, so that the pressure in the interlayer is always slightly higher than the pressure in the waste boiler, and high-temperature gas is prevented from leaking into the interlayer.
The first connecting pipeline is provided with a protective gas pressure regulating valve 33, the outside of the waste boiler section 2 is connected with a water-cooled wall pressure difference meter 23 for detecting the pressure difference between the inside of the waste boiler section 2 and the interlayer between the shell and the water-cooled wall, the water-cooled wall pressure difference meter 23 is electrically connected with the protective gas pressure regulating valve 33 to form a control loop, and the pressure of the interlayer is higher than the pressure in the waste boiler. The outside of the waste boiler section 2 is also connected with an upper inlet pressure difference meter 24 and a lower outlet pressure difference meter 25, the upper inlet pressure difference meter 24 is used for detecting the pressure difference between the waste boiler section 2 and the reaction section 1, the lower outlet pressure difference meter 25 is used for detecting the pressure difference between the waste boiler section 2 and a high-temperature gas outlet, and a gas generator pressure regulating valve 32 is arranged on the reaction gas outlet pipe 20.
The steam drum 37 is connected with a steam drum removing pipeline 30 from a boiler water pipe network, the steam drum removing pipeline 30 is provided with a steam drum liquid level regulating valve 31 and a boiler water supply flow meter 35, the steam drum 37 is provided with at least 3 steam drum liquid level meters 36, and a multiple redundancy mode is adopted; the steam pocket 37 is connected with a steam pocket discharge pipeline 26 and a steam pipeline 28 which are communicated through a second connecting pipeline, the steam pocket discharge pipeline 26 is provided with a steam pocket discharge pipeline pressure regulating valve 27, the steam pipeline 28 is provided with a steam pipeline pressure regulating valve 29 and a steam flow meter 34, and steam separated from the steam pocket 37 can be selectively sent to a low-pressure steam pipe network, a medium-pressure steam pipe network or a high-pressure steam pipe network according to requirements in production; the steam drum liquid level meter 36, the steam flow meter 34 and the boiler water supply flow meter 35 are respectively electrically connected with the steam drum liquid level regulating valve 31, a control loop is formed, three-impulse regulation is carried out, and the liquid level and the steam yield of the steam drum 37 are controlled.
And a pressure gauge is arranged on the second connecting pipeline and is electrically connected with the steam drum discharge pipeline pressure regulating valve 27 and the steam pipeline pressure regulating valve 29 respectively.
A plurality of first thermocouples 21 are inserted into an interlayer between the shell and the radiation waste boiler, and whether the water-cooled wall is damaged or not and leaks gas is monitored through the first thermocouples 21; a plurality of second thermocouples 22 are arranged on the surface of the shell; the second thermocouple 22 is positioned on the shell surface corresponding to the upper conical section water-cooled wall 201 and the middle straight-tube section water-cooled wall 202 to monitor the surface temperature, the temperature under normal conditions is below 200 ℃, once the temperature is abnormal, the problem of the water-cooled wall can be judged, and if necessary, the parking treatment can be carried out.
The method for recycling the heat of the high-temperature synthesis gas comprises the following steps:
a. Boiler water with the temperature lower than 120 ℃ from a boiler water pipe network enters a steam drum 37 through a steam drum removing pipeline 30, the boiler water flows out of the steam drum 37 and enters a first lower part feed water collecting tank 209 and a second lower part feed water collecting tank 210 through a water wall removing pipeline 4 and a radiation screen removing pipeline 5 respectively, then enters a water wall and a radiation screen 204, and after the boiler water in the water wall and the radiation screen 204 is filled, the boiler water in the steam drum 37 is kept at the liquid level of 30-60%;
b. boiler water below 120 ℃ from a boiler water pipe network enters an upper coil 207 and a lower coil 208 through an upper coil-removing pipeline 6 and a lower coil-removing pipeline 7 respectively;
c. Opening a medium-pressure steam regulating valve, allowing medium-pressure steam to enter a water wall removing pipeline 4 and a radiation screen removing pipeline 5 through a medium-pressure steam pipeline 19 to heat a water supply loop, allowing boiler water in a water wall and a radiation screen 204 to rise in temperature and then respectively enter a first upper return water collecting tank 211 and a second upper return water collecting tank 212, allowing the boiler water to enter a steam drum 37 through a water wall outlet pipeline 8 and a radiation screen outlet pipeline 9, forming a boiler water circulation loop between the steam drum 37 and the water wall and the radiation screen 204, and controlling the pressure of the steam drum to be below 0.3MPa by using a steam drum discharge pipeline pressure regulating valve 27;
d. When the temperature of the boiler water in the steam drum 37 rises to 125-135 ℃, the reaction section 1 of the gas generator starts to preheat, and after the temperature of the reaction section 1 rises to be consistent with the temperature of the boiler water, the medium-pressure steam regulating valve is closed, and the preheating heat of the reaction section 1 is utilized to continuously heat the boiler water; the pressure of the steam pocket 37 can be slowly increased in the temperature rising process, and when the pressure is increased to 0.5MPa, the steam pocket 37 is slowly opened to a low-pressure steam pipe network valve;
e. High-pressure nitrogen and CO are input into the interlayer of the water-cooled wall and the shell2Or other reaction gases as shielding gases; feeding the reaction section 1 of the gas generator, enabling high-temperature gas generated in the reaction section 1 to enter the quenching section 3 through a radiation waste boiler, exchanging heat between the radiation waste boiler and a radiation screen 204 through a water-cooled wall, absorbing heat of the high-temperature gas, heating boiler water in the radiation waste boiler, and continuously increasing the temperature, wherein a steam-water mixture formed after the boiler water is heated enters a steam pocket 37 through a water-cooled wall outlet pipeline 8, a radiation screen outlet pipeline 9, an upper coil outlet pipeline 10 and a lower coil outlet pipeline 11;
f. The pressure in the gas generator is adjusted to 1.5-9.0MPa by the gas generator pressure adjusting valve 32, the pressure of the steam drum 37 is adjusted by the steam drum discharge pipeline pressure adjusting valve 27, and steam generated by the steam drum 37 is sent to steam pipe networks of different grades by the steam pipeline pressure adjusting valve according to requirements.
the gasifier pressure, steam pressure and output are regulated by the gasifier pressure regulating valve 32 and the drum exhaust line pressure regulating valve 27.
The main function of the radiation waste boiler is to recover the sensible heat of the high-temperature gas by using a water-cooled wall radiation heat exchange mode and by-produce saturated steam so as to improve the energy utilization efficiency. The radiant waste boiler is one of key equipment for sensible heat recovery and important equipment of a gasification furnace, and the operational condition of the radiant waste boiler directly influences the availability and the overall efficiency of the system. Through the utility model discloses a design, it is efficient to carry out heat recovery, the saturated steam that recovery heat transfer that can furthest generated, and stability is high, forms a return circuit that lasts the circulation, and automated control liberates the manpower.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A high-temperature gas heat recycling system comprises a gas generator and a steam drum (37), wherein the gas generator comprises a reaction section (1), a waste boiler section (2) and a chilling section (3), the waste boiler section (2) comprises a shell and a radiation waste boiler, the radiation waste boiler is positioned in the shell, and an interlayer is arranged between the radiation waste boiler and the shell; the radiation waste boiler comprises a water-cooled wall, an upper conical section water-cooled wall (201), a middle straight-tube section water-cooled wall (202) and a lower conical section water-cooled wall (203) are sequentially communicated with the water-cooled wall from top to bottom, an upper inlet section (205) and a lower outlet section (206) are respectively arranged at the upper end of the upper conical section water-cooled wall (201) and the lower end of the lower conical section water-cooled wall (203), and an upper coil (207) and a lower coil (208) are respectively arranged on the outer sides of the upper inlet section (205) and the lower outlet section (206); the inner wall of the middle straight-tube section water-cooled wall (202) is provided with a radiation screen (204), and the device is characterized in that: the inlet ends of the water wall and the radiation screen (204) are respectively connected with a first lower water supply and water collection tank (209) and a second lower water supply and water collection tank (210), and the first lower water supply and water collection tank (209) and the second lower water supply and water collection tank (210) are respectively connected with the steam pocket (37) through a water wall removal pipeline (4) and a radiation screen removal pipeline (5); the inlet ends of the upper coil (207) and the lower coil (208) are respectively connected with an upper coil removing pipeline (6) and a lower coil removing pipeline (7) from a boiler water pipe network, the outlet ends of the water-cooled wall and the radiation screen (204) are respectively connected with a first upper return water collecting tank (211) and a second upper return water collecting tank (212), the first upper return water collecting tank (211) and the second upper return water collecting tank (212) are respectively connected with the steam drum through a water outlet wall pipeline (8) and a radiation screen outlet pipeline (9), and the outlet ends of the upper coil (207) and the lower coil (208) are respectively connected with the steam drum (37) through an upper coil outlet pipeline (10) and a lower coil outlet pipeline (11).
2. The high-temperature gas heat recovery and utilization system according to claim 1, wherein: the first upper backwater collecting tank (211) and the second upper backwater collecting tank (212) are positioned at the upper end of the middle straight-tube section water-cooled wall (202), and the first lower water supply collecting tank (209) and the second lower water supply collecting tank (210) are positioned at the lower end of the middle straight-tube section water-cooled wall (202); the first upper return water collecting tank (211) and the second upper return water collecting tank (212) are communicated with the outside through a discharge pipe; and the first lower water supply and collection tank (209) and the second lower water supply and collection tank (210) carry out sewage discharge through a drain pipe.
3. The high-temperature gas heat recovery and utilization system according to claim 2, wherein: the waste boiler section (2) is communicated with high-pressure nitrogen and CO through a first connecting pipeline2A pipeline (17) is connected with a reaction gas pipeline (18), and the first connecting pipeline is communicated with the interlayer between the shell and the water wall; the quenching section (3) is connected with a reaction gas outlet pipe (20); the water removal wall pipeline (4) and the radiation removal screen pipeline (5) are connected with a medium-pressure steam pipeline (19).
4. a high temperature gas heat recovery and utilization system according to claim 3, wherein: a protective gas pressure regulating valve (33) is arranged on the first connecting pipeline, the outside of the waste boiler section (2) is connected with a water-cooled wall pressure difference meter (23) for detecting the pressure difference between the inside of the waste boiler section (2) and an interlayer between the shell and the water-cooled wall, and the water-cooled wall pressure difference meter (23) is electrically connected with the protective gas pressure regulating valve (33) and forms a control loop; the waste boiler section (2) is externally connected with an upper inlet pressure difference meter (24) and a lower outlet pressure difference meter (25), the upper inlet pressure difference meter (24) is used for detecting the pressure difference between the reaction section (1) and the waste boiler section (2), the lower outlet pressure difference meter (25) is used for detecting the pressure difference between the waste boiler section (2) and a high-temperature gas outlet, and a gas generator pressure regulating valve (32) is arranged on the reaction gas outlet pipe (20).
5. the high-temperature gas heat recovery and utilization system according to claim 1, wherein: the steam drum (37) is connected with a steam drum removing pipeline (30) from a boiler water pipe network, a steam drum liquid level regulating valve (31) and a boiler water supply flow meter (35) are arranged on the steam drum removing pipeline (30), and at least 3 steam drum liquid level meters (36) are arranged on the steam drum (37); the steam pocket (37) is connected with steam pocket discharge pipeline (26) and steam pipeline (28) of intercommunication through second connecting line, be equipped with steam pocket discharge pipeline pressure regulating valve (27) on steam pocket discharge pipeline (26), be equipped with steam pipeline pressure regulating valve (29) and steam flow meter (34) on steam pipeline (28), steam pocket level gauge (36), steam flow meter (34), boiler give water flowmeter (35) respectively with steam pocket level regulating valve (31) electric connection to form the control loop, carry out three momentum and adjust, control steam pocket (37) liquid level and steam output.
6. The high-temperature gas heat recovery and utilization system according to claim 5, wherein: and a pressure gauge is arranged on the second connecting pipeline and is electrically connected with a steam drum discharge pipeline pressure regulating valve (27) and a steam pipeline pressure regulating valve (29) respectively.
7. The high-temperature gas heat recovery and utilization system according to claim 1, wherein: a plurality of first thermocouples (21) are inserted into an interlayer between the shell and the radiation waste pan, and a plurality of second thermocouples (22) are arranged on the surface of the shell; and the second thermocouple (21) is positioned on the shell surface corresponding to the upper conical section water-cooled wall (201) and the middle straight-tube section water-cooled wall (202).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822119730.XU CN209797884U (en) | 2018-12-18 | 2018-12-18 | High-temperature gas heat recycling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822119730.XU CN209797884U (en) | 2018-12-18 | 2018-12-18 | High-temperature gas heat recycling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109401799A (en) * | 2018-12-18 | 2019-03-01 | 山东兖矿国拓科技工程股份有限公司 | A kind of high-temperature gas heat recycling system and method |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109401799A (en) * | 2018-12-18 | 2019-03-01 | 山东兖矿国拓科技工程股份有限公司 | A kind of high-temperature gas heat recycling system and method |
| CN109401799B (en) * | 2018-12-18 | 2023-12-22 | 山东兖矿国拓科技工程股份有限公司 | High-temperature gas heat recycling system and method |
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