CN218494949U - Gas tail gas treatment and waste heat recovery system based on heat insulation afterburning waste heat boiler - Google Patents
Gas tail gas treatment and waste heat recovery system based on heat insulation afterburning waste heat boiler Download PDFInfo
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- CN218494949U CN218494949U CN202221626769.0U CN202221626769U CN218494949U CN 218494949 U CN218494949 U CN 218494949U CN 202221626769 U CN202221626769 U CN 202221626769U CN 218494949 U CN218494949 U CN 218494949U
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Abstract
The utility model relates to a gas tail gas treatment and waste heat recovery system based on heat insulation after-burning exhaust-heat boiler, including the gas generator set, the system includes heat insulation after-burning exhaust-heat furnace, heat insulation after-burning exhaust-heat furnace includes left combustion chamber, middle convection bank room and the economizer room on right side, the gas generator set passes through the gas tail gas collection pipeline and connects the first heat insulation after-burning exhaust-heat furnace entry of combustion chamber; an outlet of the heat-insulating after-burning waste heat furnace of the economizer chamber is connected with an induced draft fan through an induced draft fan pipeline, the induced draft fan is connected with a chimney through a pipeline, and the convection tube bank chamber is provided with a convection tube bank from top to bottom; the economizer is provided with the economizer in the economizer room, combustion chamber and convection bank room through the through-hole intercommunication that upper portion set up, through the through-hole intercommunication that the lower part set up, this technical scheme of passageway can be the source waste with in the gas tail gas harmful substance to the environmental pollution problem.
Description
Technical Field
The utility model belongs to the technical field of environmental engineering exhaust-gas treatment, concretely relates to gas tail gas handles and waste heat recovery system based on adiabatic afterburning exhaust-heat boiler.
Background
The residual gas generated in the dry distillation process of the oil shale is used for generating electricity, the method is a beneficial project integrating reasonable resource allocation and mine safety production, belongs to a gas comprehensive utilization project, and has good energy-saving effect, environmental, economic and social benefits, because the combustion of a unit is insufficient, only about 35 percent of energy of fuel is converted into electric energy when the unit generates electricity, about 25 percent of the energy is taken away by cooling water of a generator, the rest of the energy is discharged along with high-temperature smoke (about 450-500 ℃), not only energy waste is caused, but also the tail gas has great influence on the environment, and does not meet the national policy requirements of energy conservation and emission reduction.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that the energy is extravagant and harmful substance pair environmental pollution problem among the gas tail gas, for solving above-mentioned problem, provides a gas tail gas treatment and waste heat recovery system based on adiabatic afterburning waste heat stove.
The purpose of the utility model is realized with the following mode:
a gas tail gas treatment and waste heat recovery system based on an adiabatic afterburning waste heat boiler comprises a gas generator set 22, the system comprises an adiabatic afterburning waste heat furnace 4, the adiabatic afterburning waste heat furnace 4 comprises a left combustion chamber 45, a middle convection tube bundle chamber 46 and a right economizer chamber 47, and the gas generator set 22 is connected with a first adiabatic afterburning waste heat furnace inlet 41 of the combustion chamber 45 through a gas tail gas collection pipeline 1; an outlet 44 of the adiabatic afterburning waste heat furnace of the economizer chamber 47 is connected with an induced draft fan 6 through an induced draft fan pipeline 61, the induced draft fan 6 is connected with a chimney 7 through a pipeline, and the convection bank chamber 46 is provided with a convection bank 12 from top to bottom; the economizer 14 is arranged in the economizer chamber 47, the combustion chamber 45 is communicated with the convection bank chamber 46 through a through hole formed in the upper portion, and the convection bank chamber 46 is communicated with the economizer chamber 47 through a through hole formed in the lower portion.
Be equipped with the adiabatic afterburning waste heat stove of second entry 42 on the combustion chamber 45, the adiabatic afterburning waste heat stove of second entry 42 is located the first adiabatic afterburning waste heat stove and enters 41 lower parts, the adiabatic afterburning waste heat stove of second entry 42 pass through gas afterburning pipeline 81 and connect gas storage tank 8.
And a third heat-insulating afterburning waste heat furnace inlet 43 is formed in the combustion chamber 45, the third heat-insulating afterburning waste heat furnace inlet 43 is positioned at the lower part of the second heat-insulating afterburning waste heat furnace inlet 42, and the third heat-insulating afterburning waste heat furnace inlet 43 is connected with the air blower 5 through an air blower pipeline.
The convection bank chamber 46 is provided with a guide plate 17, one end of the guide plate 17 is fixed on the side wall of the convection bank chamber 46, and the height of the other end is lower than the fixed end of the guide plate 17.
The number of the guide plates 17 is at least two, and the guide plates 17 of the at least two are arranged in a left-right staggered mode.
The upper end of the economizer 14 is connected with a water feeding pump 10 through a pipeline, the water feeding pump 10 is connected with a deaerator 9 through a pipeline, and the lower end of the economizer 14 is connected with a convection bank 12.
The gas tail gas collecting pipeline 1 is provided with a gas tail gas inlet valve 16, a bypass pipeline 101 is arranged on a pipeline between the gas tail gas inlet valve 16 and the gas generator set 22, and a gas tail gas system bypass valve 15 is arranged on the bypass pipeline 101.
The gas after-burning pipeline 81 is provided with a gas inlet valve 19, a gas diffusion pipeline is arranged between the gas inlet valve 19 and the gas storage tank 8, and a gas diffusion valve 18 is arranged on the gas diffusion pipeline.
The gas tail gas inlet valve 16 is connected with the PLC, and the gas tail gas system bypass valve 15 is connected with the PLC.
The gas inlet valve 19 is connected with the PLC, and the gas discharge valve 18 is connected with the PLC.
Compared with the prior art, the utility model relates to a gas tail gas treatment and waste heat recovery system based on adiabatic afterburning exhaust-heat boiler, including gas generator set, this system includes adiabatic afterburning waste heat stove, and adiabatic afterburning waste heat stove includes left combustion chamber, middle convection bank room and right economizer room, and gas generator set passes through the first adiabatic afterburning waste heat stove entry of gas tail gas collecting pipe connection combustion chamber; an outlet of the heat-insulating after-burning waste heat furnace of the economizer chamber is connected with an induced draft fan through an induced draft fan pipeline, the induced draft fan is connected with a chimney through a pipeline, and the convection tube bundle chamber is provided with a convection tube bundle from top to bottom; the economizer is arranged in the economizer chamber, the combustion chamber is communicated with the convection bank chamber through a through hole formed in the upper part, the convection bank chamber is communicated with the economizer chamber through a through hole formed in the lower part, and the technical scheme of the channel can solve the problem of environmental pollution caused by harmful substances in waste source and gas tail gas.
Drawings
Fig. 1 is a schematic connection diagram of the present invention.
Wherein, 1-a gas tail gas collecting pipeline; 2-a gas generator set; 3-a gas tail gas discharge branch pipe; 4-adiabatic afterburning waste heat furnace; 5-a blower; 6-an induced draft fan; 7-a chimney; 8-a gas storage tank; 9-a deaerator; 10-a feed pump; 12 a convection bank; 14-a coal economizer; 15-a gas exhaust system bypass valve; 16-gas tail gas inlet valve; 17-a deflector; 18-a gas relief valve and 19-a gas inlet valve; 41-inlet of first heat insulation after-combustion furnace; 42-inlet of second adiabatic afterburning waste heat furnace; 43-inlet of the third adiabatic afterburning waste heat furnace; 44-an outlet of the heat-insulation after-burning waste heat boiler; 45-a combustion chamber; 46-convection bank chamber; 47-economizer chamber; 81-gas after-burning pipeline.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Therefore, the following detailed description of the embodiments of the present invention, which is provided in the accompanying drawings, is not intended to limit the scope of the invention, which is claimed, but is merely representative of selected embodiments of the invention, and all other embodiments that can be obtained by one of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the scope of the invention
As shown in fig. 1, a gas tail gas treatment and waste heat recovery system based on an adiabatic afterburning waste heat furnace comprises a gas generator set 22, the system comprises an adiabatic afterburning waste heat furnace 4, the adiabatic afterburning waste heat furnace 4 comprises a left combustion chamber 45, the combustion chamber comprises a bottom adiabatic combustion chamber and an upper afterburning chamber, a middle convection tube bundle chamber 46, a right economizer chamber 47, an upper drum 48 and a lower drum 49, the gas generator set 22 is connected with a gas tail gas collecting pipeline 1 through a gas tail gas discharge branch pipe 3, and the gas tail gas collecting pipeline 1 is connected with a first inlet 41 of the adiabatic afterburning waste heat furnace of the combustion chamber 45; an outlet 44 of the heat-insulating after-burning waste heat furnace of the economizer chamber 47 is connected with an induced draft fan 6 through an induced draft fan pipeline 61, the induced draft fan 6 is connected with a chimney 7 through a pipeline, and the convection bank chamber 46 is provided with a convection bank 12 from top to bottom; the economizer 14 is arranged in the economizer chamber 47, the combustion chamber 45 is communicated with the convection bank chamber 46 through a through hole arranged at the upper part, and the convection bank chamber 46 is communicated with the economizer chamber 47 through a through hole arranged at the lower part.
Be equipped with the adiabatic after-heat stove entry 42 of afterburning of second on the combustion chamber 45, the adiabatic after-heat stove entry 42 of afterburning of second is located the 41 lower parts of first adiabatic after-heat stove entry, the adiabatic after-heat stove entry 42 of afterburning of second connect gas storage tank 8 through gas after-heat pipeline 81, be provided with gas admission valve 19 on the gas after-combustion pipeline 81, be provided with gas blow-off pipe way between gas admission valve 19 and the gas storage tank 8, be provided with gas blow-off valve 18 on the gas blow-off pipe way, gas admission valve 19 can close during the gas gets into combustion chamber 45 in the gas storage tank, gas blow-off valve 18's effect is that exhaust-heat boiler stops burning in time to get rid of the surplus gas in the gas pipeline, guarantees system security.
The combustor 45 is provided with a third heat-insulating afterburning waste heat furnace inlet 43, the third heat-insulating afterburning waste heat furnace inlet 43 is positioned at the lower part of the second heat-insulating afterburning waste heat furnace inlet 42, the third heat-insulating afterburning waste heat furnace inlet 43 is connected with the blower 5 through a blower pipeline, and the blower is used for providing oxygen required by combustion of gas in the combustor.
Economizer 14 upper end pass through tube coupling feed pump 10, feed pump 10 passes through tube coupling oxygen-eliminating device 9, the effect of feed pump is the required water source in supplementing the boiler operation, the 9 upper ends of oxygen-eliminating device are connected with the container, have the demineralized water in the storage, the effect of oxygen-eliminating device 9 is the unnecessary oxygen of aquatic of detaching, avoids the system to produce oxygen and corrodes, oxygen-eliminating device, feed pump and pipeline arrange on the afterburning waste heat stove moisturizing device in the afterburning waste heat stove of burning absolutely.
The lower end of the economizer 14 is connected with a convection bank 12, the connection of the convection bank 12 is used for connecting an upper drum and a lower drum, water in the banks is continuously heated by the contact of high-temperature flue gas on the surface, and the heated water rises to the upper drum 48 from the lower drum 49, so that the convection of the water is realized between the upper drum and the lower drum.
The gas tail gas collecting pipeline 1 is provided with a gas tail gas inlet valve 16, a bypass pipeline 101 is arranged on a pipeline between the gas tail gas inlet valve 16 and the gas generator set 2, and a gas tail gas system bypass valve 15 is arranged on the bypass pipeline 101.
The gas tail gas inlet valve 16 is connected with the PLC, and the gas tail gas system bypass valve 15 is connected with the PLC. The gas inlet valve 19 is connected with the PLC, and the gas discharge valve 18 is connected with the PLC.
The utility model provides a gas tail gas handles and waste heat recovery system based on adiabatic afterburning waste heat stove uses the adiabatic afterburning waste heat stove of burning, through the adiabatic burning of premixed gas in order to supply heat energy, makes its temperature reach 850 ℃, burns the harmful component in the tail gas on the one hand, and on the other hand is the abundant recovery gas heat of combustion and tail gas sensible heat, retrieves the waste heat.
The utility model adopts a boiler with the structural design that a double-boiler barrel transversely arranged natural circulation water pipe boiler is adopted, and dust-containing flue gas is discharged out of the boiler after passing through a combustion chamber, a convection bank and a steel pipe economizer. The afterburning device is arranged at the bottom of the combustion chamber of the afterburning chamber, the bottom of the tail gas inlet is heated by the bottom afterburning device, and the inlet tail gas is heated to about 850 ℃ when reaching the top of the afterburning chamber; then the heated gas enters the heating surface of the convection evaporation tube bundle of the middle combustion chamber, and a flue gas guide plate is arranged in the convection evaporation heated tube bundle to strengthen the flow guide of the flue gas side and the heat exchange of the flue gas side; and finally enters a horizontal tube bundle water supply preheating part of the post combustion chamber.
The utility model discloses system's equipment is less, and the operation is simple, adopts full-automatic and manual control mode, adopts PLC control system.
The utility model discloses concrete system concrete control system as follows:
1) The operation of the gas generator set 22 and the operation of the heat insulation afterburning waste heat furnace do not influence each other. When the heat insulation after-combustion waste heat furnace stops running, the bypass valve 15 of the gas tail gas system is opened, the gas tail gas inlet valve 16 is closed, and tail gas of the gas generator set 2 is diffused through the bypass flue.
2) And starting the boiler.
2.1 The boiler is put into operation, at the beginning of starting, the gas tail gas inlet valve 16 is closed first, the gas tail gas system bypass valve 15 is kept in an open state, the induced draft fan 6 is started first (the flow of the induced draft fan is ensured to be more than 1/3 of the rated flow), and then the blower 5 is fully started.
2.2 After the above operation, the gas main valve is opened and then ignited.
2.3 The rotating speed of the induced draft fan is increased, and the air volume is increased.
2.4 When the temperature of the outlet of the combustion chamber (which is the interface of the upper part of the combustion chamber 45 into the convection bank chamber 46) exceeds 900 ℃, the gas tail gas inlet valve 16 is opened.
2.5 Synchronously increasing the gas and the combustion-supporting air quantity, monitoring the outlet temperature of the combustion chamber at the same time, ensuring the outlet temperature of the flue gas of the combustion chamber to be more than 800 ℃, then increasing the induced draft fan, and synchronously increasing the gas and the air quantity to rated values until the induced draft fan is fully opened to the rated values.
3) Normal operation monitoring item (constant amount of exhaust gas).
3.1 The monitoring item includes: combustion temperature, combustion chamber outlet temperature, exhaust gas temperature, tail gas inlet temperature; tail gas inlet pressure (pressure on a main pipe), combustion chamber pressure, front pressure of an induced draft fan and rear pressure of the induced draft fan (pressure of entering a chimney); tail gas inlet flow (entering a boiler), draught fan outlet flue gas flow, coal gas flow and air flow; boiler outlet steam parameters (temperature, pressure, flow), feedwater parameters (temperature, pressure, flow); a burner: gas inlet parameters, inlet air parameters.
3.2 The main monitoring item is the temperature of the smoke at the outlet of the combustion chamber, and the monitoring range is between 800 and 900 ℃.
3.3 The rotating speed of the induced draft fan 6 is adjusted according to the pressure of the tail gas inlet, and the outlet of the combustion chamber at the upper part of the combustion chamber is monitored (the temperature of the flue gas is above 800 ℃).
3.4 When the temperature of the flue gas at the outlet of the combustion chamber at the upper part of the combustion chamber is reduced to be below 800 ℃, the gas and air flow is automatically adjusted by the burner, the pressure of the afterburning chamber of the boiler is increased, the rotating speed of the induced draft fan is synchronously increased, and the pressure of the afterburning chamber is stabilized to be about-100 Pa.
3.5 By monitoring the exhaust gas temperature of the boiler, stabilizing the exhaust gas temperature within the range of 180 to 250 ℃; the temperature of the flue gas at the outlet of the combustion chamber of the afterburning chamber is higher than 850 ℃, the temperature of the discharged flue gas exceeds 250 ℃, and the gas and air quantity are reduced; the temperature of the flue gas at the outlet of the combustion chamber of the afterburning chamber is lower than 850 ℃, higher than 800 ℃, the temperature of the flue gas is lower than 180 ℃, and the supply of the gas air quantity is increased (the specific set monitoring value is determined according to the operation condition after the actual operation).
4) The amount of exhaust gas caused by the stop of the gas generator set 2 is reduced (direction adjustment).
4.1 Reduced amount of boiler feed gas, corresponding to reduced gas and air supply, while a small draught fan is turned on to ensure that the combustion chamber temperature is above 800 c.
4.2 To ensure the boiler exhaust gas temperature is reasonable, monitoring the exhaust gas temperature to be above 180 ℃; method step 3.5.
5) And controlling the steam quantity.
5.1 Too much steam quantity, properly reducing the gas air quantity, and simultaneously ensuring the temperature of the flue gas at the outlet of the combustion chamber to be more than 800 ℃; and under emergency, controlling the temperature of the boiler exhaust smoke to be not lower than 180 ℃.
5.2 Too little steam, increasing the supply of gas and air, controlling the outlet temperature of the combustion chamber within 900 ℃, and controlling the exhaust temperature of the boiler below 250 ℃.
6) And (5) stopping the boiler.
6.1 Gas and air supply is stopped first.
6.2 Open the exhaust gas bypass and close the boiler exhaust gas inlet.
6.3 Delay 15min to shut down the induced draft fan.
6.4 Adjusting the feed water to maintain the drum level.
The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations of the technical features should be considered as the range described in the present specification, and when there is a mutual contradiction or cannot be realized, the combinations of the technical features should be considered as not being present, and are not within the scope of the present invention. Also, it will be apparent to those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the spirit of the principles of the present invention.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.
Claims (10)
1. The utility model provides a gas tail gas handles and waste heat recovery system based on adiabatic afterburning exhaust-heat boiler, includes gas generating set (22), its characterized in that: the system comprises an adiabatic afterburning waste heat furnace (4), wherein the adiabatic afterburning waste heat furnace (4) comprises a left combustion chamber (45), a middle convection tube bundle chamber (46) and a right economizer chamber (47), and a gas generator set (22) is connected with a first adiabatic afterburning waste heat furnace inlet (41) of the combustion chamber (45) through a gas tail gas collecting pipeline (1); an outlet (44) of the adiabatic afterburning waste heat furnace of the economizer chamber (47) is connected with an induced draft fan (6) through an induced draft fan pipeline (61), the induced draft fan (6) is connected with a chimney (7) through a pipeline, and the convection bank chamber (46) is provided with a convection bank (12) from top to bottom; economizer (14) are arranged in economizer chamber (47), combustion chamber (45) and convection bank chamber (46) are communicated through the through hole arranged on the upper part, and convection bank chamber (46) and economizer chamber (47) are communicated through the through hole arranged on the lower part.
2. The gas tail gas treatment and waste heat recovery system based on the heat insulation after-combustion waste heat boiler as claimed in claim 1, characterized in that: be equipped with on combustion chamber (45) second adiabatic afterburning waste heat stove entry (42), second adiabatic afterburning waste heat stove entry (42) are located first adiabatic afterburning waste heat stove entry (41) lower part, second adiabatic afterburning waste heat stove entry (42) connect gas storage tank (8) through gas afterburning pipeline (81).
3. The gas tail gas treatment and waste heat recovery system based on the heat insulation afterburning waste heat boiler as claimed in claim 1, wherein: be equipped with third adiabatic afterburning waste heat stove entry (43) on combustion chamber (45), third adiabatic afterburning waste heat stove entry (43) are located second adiabatic afterburning waste heat stove entry (42) lower part, third adiabatic afterburning waste heat stove entry (43) pass through air-blower tube coupling air-blower (5).
4. The gas tail gas treatment and waste heat recovery system based on the heat insulation afterburning waste heat boiler as claimed in claim 1, wherein: convection bank room (46) be provided with guide plate (17), guide plate (17) one end fix on the lateral wall of convection bank room (46), the stiff end of guide plate (17) is less than in the height of the other end.
5. The gas tail gas treatment and waste heat recovery system based on the heat insulation afterburning waste heat boiler as claimed in claim 4, wherein: the number of the guide plates (17) is at least two, and the guide plates (17) of the at least two are arranged in a left-right staggered mode.
6. The gas tail gas treatment and waste heat recovery system based on the heat insulation after-combustion waste heat boiler as claimed in claim 1, characterized in that: the upper end of the economizer (14) is connected with a water feeding pump (10) through a pipeline, the water feeding pump (10) is connected with a deaerator (9) through a pipeline, and the lower end of the economizer (14) is connected with a convection bank (12).
7. The gas tail gas treatment and waste heat recovery system based on the heat insulation afterburning waste heat boiler as claimed in claim 1, wherein: the gas tail gas collecting pipeline (1) is provided with a gas tail gas inlet valve (16), a bypass pipeline (101) is arranged on a pipeline between the gas tail gas inlet valve (16) and the gas generator set (22), and a gas tail gas system bypass valve (15) is arranged on the bypass pipeline (101).
8. The gas tail gas treatment and waste heat recovery system based on the heat insulation afterburning waste heat boiler as claimed in claim 2, wherein: the gas after-burning pipeline (81) is provided with a gas inlet valve (19), a gas diffusion pipeline is arranged between the gas inlet valve (19) and the gas storage tank (8), and a gas diffusion valve (18) is arranged on the gas diffusion pipeline.
9. The gas tail gas treatment and waste heat recovery system based on the heat insulation after-combustion waste heat boiler as claimed in claim 7, wherein: the gas tail gas inlet valve (16) is connected with the PLC, and the gas tail gas system bypass valve (15) is connected with the PLC.
10. The gas tail gas treatment and waste heat recovery system based on the heat insulation afterburning waste heat boiler according to claim 8, wherein: the gas inlet valve (19) is connected with the PLC, and the gas emission valve (18) is connected with the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221626769.0U CN218494949U (en) | 2022-06-28 | 2022-06-28 | Gas tail gas treatment and waste heat recovery system based on heat insulation afterburning waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221626769.0U CN218494949U (en) | 2022-06-28 | 2022-06-28 | Gas tail gas treatment and waste heat recovery system based on heat insulation afterburning waste heat boiler |
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| Publication Number | Publication Date |
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| CN218494949U true CN218494949U (en) | 2023-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221626769.0U Active CN218494949U (en) | 2022-06-28 | 2022-06-28 | Gas tail gas treatment and waste heat recovery system based on heat insulation afterburning waste heat boiler |
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| CN (1) | CN218494949U (en) |
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2022
- 2022-06-28 CN CN202221626769.0U patent/CN218494949U/en active Active
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