CN210057905U - Denitration system of waste heat boiler of gas turbine - Google Patents
Denitration system of waste heat boiler of gas turbine Download PDFInfo
- Publication number
- CN210057905U CN210057905U CN201920551582.0U CN201920551582U CN210057905U CN 210057905 U CN210057905 U CN 210057905U CN 201920551582 U CN201920551582 U CN 201920551582U CN 210057905 U CN210057905 U CN 210057905U
- Authority
- CN
- China
- Prior art keywords
- urea solution
- unit
- heat boiler
- flue gas
- urea
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model relates to a gas turbine exhaust-heat boiler deNOx systems belongs to boiler denitration technical field. The utility model provides a current gas turbine arranges the technical problem that the flue gas can't realize stabilizing ultralow emission outward. The technical scheme of the utility model is that: a gas turbine exhaust-heat boiler deNOx systems, wherein: the device comprises a compressed air storage tank, a urea solution delivery pump, an adjusting and metering unit, a urea pyrolysis furnace, an injection unit, a cold air adjusting valve, a hot flue gas adjusting valve, a fan, a waste heat boiler, an ammonia injection grid and a catalyst unit. The utility model has the advantages of comprehensive utilization rate is high, work efficiency is high, can guarantee that the outer flue gas of gas turbine is arranged and realize stable ultralow emission.
Description
Technical Field
The utility model belongs to the technical field of the boiler denitration, especially, relate to a gas turbine exhaust-heat boiler deNOx systems.
Background
Since eighteen years, the ecological civilization construction has risen to the height of national strategy, twelve and five key works in China clearly propose to control the emission of nitrogen oxides in thermal power plants, and SCR denitration technology is mainly adopted for denitration of gas turbine units. At present, the power plant boiler mainly obtains ammonia-air mixed gas through a pyrolysis method or a hydrolysis method, and most of heat sources adopt steam, high-temperature air or flue gas. However, the boiler flue gas temperature is high, and the fan and the like are easily damaged, so that stable ultralow emission cannot be realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the technical problem of current gas turbine outer row flue gas can't realize stabilizing ultralow emission is solved, the utility model provides a gas turbine exhaust-heat boiler deNOx systems.
The utility model discloses a realize through following technical scheme:
a gas turbine exhaust-heat boiler deNOx systems, wherein: the device comprises a compressed air storage tank, a urea solution delivery pump, an adjusting and metering unit, a urea pyrolysis furnace, an injection unit, a cold air adjusting valve, a hot flue gas adjusting valve, a fan, a waste heat boiler, an ammonia injection grid and a catalyst unit;
the ammonia injection grid and the catalyst unit are sequentially arranged in the waste heat boiler along the flowing direction of the flue gas; the flue gas temperature at the position of the waste heat boiler arranged on the catalyst unit is 250-350 ℃; the side wall of the waste heat boiler flaring is provided with a hot flue gas outlet, and the connecting position of the side wall of the waste heat boiler and the ammonia injection grid is provided with an ammonia injection grid inlet;
the spraying unit is horizontally arranged on one side of the upper part of the urea pyrolysis furnace, one end of the spraying unit is provided with a spraying port, the other end of the spraying unit is provided with a spraying unit compressed air inlet and a spraying unit urea solution inlet, and one end of the spraying port of the spraying unit extends into the furnace cavity of the urea pyrolysis furnace;
the outlet of the compressed air storage tank is connected with the compressed air inlet of the regulating and metering unit; an outlet of the urea solution storage tank is connected with an inlet of a urea solution delivery pump, and an outlet of the urea solution delivery pump is respectively connected with a urea solution inlet of the regulating and metering unit and a urea solution circulating inlet of the urea solution storage tank; the adjusting and metering unit compressed air outlet is connected with the spraying unit compressed air inlet, and the adjusting and metering unit urea solution outlet is connected with the spraying unit urea solution inlet; the urea pyrolysis furnace flue gas inlet is respectively connected with a cold air regulating valve outlet and a hot flue gas regulating valve outlet, the hot flue gas regulating valve inlet is connected with a boiler hot flue gas leading-out opening, the cold air regulating valve inlet is communicated with the external atmosphere, the urea pyrolysis furnace flue gas outlet is connected with a fan inlet, and the fan outlet is connected with an ammonia spraying grid inlet.
Further, the concentration of ammonia gas discharged from the urea pyrolysis furnace is lower than 5%; the mass concentration of the urea solution in the urea solution storage tank is 35-50%.
Further, the injection unit comprises 1-6 double-fluid spray guns.
Further, adjust the measurement unit and include urea solution governing valve, urea solution flowmeter, compressed air governing valve and air flowmeter, urea solution flowmeter is electromagnetic flowmeter, ultrasonic flowmeter or rotameter, the air flowmeter is rotameter.
Further, the catalyst of the catalyst unit is in a plate type or a honeycomb type.
The utility model adopts pyrolysis method for urea ammonia production, the heat source is led from high temperature flue gas, compared with the hydrolysis method, the utility model has the advantages of no steam consumption, fast pyrolysis speed, and good response to the change of the reducing agent consumption caused by the load change of the boiler; the arrangement of the cold air regulating valve and the hot flue gas regulating valve can effectively control the working temperature of the fan, reduce energy consumption and prolong the service life of the fan; the urea solution is conveyed to a circulation pipeline arranged before the regulation metering unit, and large-flow circulation is adopted, so that the urea solution conveying pump can normally work in a wide flow range, and the urea is prevented from crystallizing due to the reduction of the environmental temperature.
The utility model has the advantages of comprehensive utilization rate is high, work efficiency is high, can guarantee that the outer flue gas of gas turbine is arranged and realize stable ultralow emission.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, a denitration system of a gas turbine exhaust-heat boiler, wherein: the device comprises a compressed air storage tank 1, a urea solution storage tank 2, a urea solution delivery pump 3, an adjusting and metering unit 4, a urea pyrolysis furnace 8, an injection unit 7, a cold air adjusting valve 5, a hot flue gas adjusting valve 6, a fan 12, a waste heat boiler 9, an ammonia spraying grid 10 and a catalyst unit 11;
the ammonia injection grid 10 and the catalyst unit 11 are sequentially arranged in the waste heat boiler 9 along the flow direction of the flue gas; the flue gas temperature at the position of the waste heat boiler, where the catalyst unit 11 is arranged, is 250-350 ℃; a hot flue gas outlet is formed in the side wall of the flaring of the waste heat boiler 9, and an inlet of an ammonia injection grid 10 is formed in the connecting position of the side wall of the waste heat boiler 9 and the ammonia injection grid 10;
the spraying unit 7 is horizontally arranged on one side of the upper part of the urea pyrolysis furnace 8, one end of the spraying unit 7 is provided with a spraying port, the other end of the spraying unit 7 is provided with a spraying unit compressed air inlet and a spraying unit urea solution inlet, and one end of the spraying port of the spraying unit 7 extends into the furnace cavity of the urea pyrolysis furnace 8;
the outlet of the compressed air storage tank 1 is connected with the compressed air inlet of the adjusting and metering unit 4; an outlet of the urea solution storage tank 2 is connected with an inlet of a urea solution delivery pump 3, and an outlet of the urea solution delivery pump 3 is respectively connected with a urea solution inlet of the regulating and metering unit 4 and a urea solution circulating inlet of the urea solution storage tank 2; the compressed air outlet of the adjusting and metering unit 4 is connected with the compressed air inlet of the injection unit, and the urea solution outlet of the adjusting and metering unit 4 is connected with the urea solution inlet of the injection unit; 8 flue gas inlets of the urea pyrolysis furnace are respectively connected with 5 outlets of the cold air regulating valve and 6 outlets of the hot flue gas regulating valve, 6 inlets of the hot flue gas regulating valve are connected with a hot flue gas leading-out opening of the boiler, 5 inlets of the cold air regulating valve are communicated with the outside atmosphere, 8 flue gas outlets of the urea pyrolysis furnace are connected with 12 inlets of the fan, and 12 outlets of the fan are connected with 10 inlets of the ammonia spraying grids.
Further, the concentration of ammonia gas discharged from the urea pyrolysis furnace 8 is lower than 5%; the mass concentration of the urea solution in the urea solution storage tank 2 is 35-50%.
Further, the injection unit 7 comprises 1-6 double-fluid spray guns.
Further, the adjusting and metering unit 4 comprises a urea solution adjusting valve, a urea solution flowmeter, a compressed air adjusting valve and an air flowmeter, the urea solution flowmeter is an electromagnetic flowmeter, an ultrasonic flowmeter or a rotor flowmeter, and the air flowmeter is a rotor flowmeter.
Further, the catalyst of the catalyst unit 11 is distributed in a plate type or a honeycomb type.
The working process of the waste heat boiler denitration system of the gas turbine comprises the following steps:
1) compressed air enters the regulating and metering unit 4 from the compressed air storage tank 1, is subjected to metering and pressure reduction, then enters the injection unit 7, and urea solution flows out of the urea solution storage tank 2, passes through the urea solution delivery pump 3, enters the regulating and metering unit 4, and enters the injection unit 7 after being regulated and metered;
2) opening a cold air regulating valve 5, starting a fan 12, allowing cold air to enter a pyrolysis furnace through a flue gas inlet of the pyrolysis furnace, then slowly opening a hot flue gas regulating valve 6, meanwhile, slowly closing the cold air regulating valve 5, starting an injection unit 7 when the temperature of flue gas at an inlet of the fan 12 reaches 300 ℃, continuously reducing the opening degree of the cold air regulating valve 5, increasing the opening degree of a hot air regulating valve to enable the temperature of the flue gas at the inlet of the fan 12 to be stable below 350 ℃, finally closing the cold air regulating valve 5 under a normal operation condition, and realizing the control of the temperature of the flue gas at the inlet of the fan 12 by regulating the amounts of the hot flue gas regulating;
3) the ammonia gas discharged from the urea pyrolysis furnace 8 flows through the fan 12, enters the ammonia injection grid 10 from the inlet of the ammonia injection grid 10 to be uniformly distributed with the reducing agent, and then reaches the catalyst unit 11 to be subjected to denitration reaction.
As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (5)
1. The utility model provides a gas turbine exhaust-heat boiler deNOx systems which characterized in that: the device comprises a compressed air storage tank (1), a urea solution storage tank (2), a urea solution delivery pump (3), an adjusting and metering unit (4), a urea pyrolysis furnace (8), an injection unit (7), a cold air adjusting valve (5), a hot flue gas adjusting valve (6), a fan (12), a waste heat boiler (9), an ammonia spraying grid (10) and a catalyst unit (11);
the ammonia injection grid (10) and the catalyst unit (11) are sequentially arranged in the waste heat boiler (9) along the flow direction of flue gas; the flue gas temperature at the position of the waste heat boiler, where the catalyst unit (11) is arranged, is 250-350 ℃; a hot flue gas outlet is formed in the side wall of the flaring of the waste heat boiler (9), and an ammonia spraying grid (10) inlet is formed in the connecting position of the side wall of the waste heat boiler (9) and the ammonia spraying grid (10);
the spraying unit (7) is horizontally arranged on one side of the upper part of the urea pyrolysis furnace (8), one end of the spraying unit (7) is provided with a spraying port, the other end of the spraying unit (7) is provided with a spraying unit compressed air inlet and a spraying unit urea solution inlet, and one end of the spraying port of the spraying unit (7) extends into the furnace cavity of the urea pyrolysis furnace (8);
the outlet of the compressed air storage tank (1) is connected with the compressed air inlet of the adjusting and metering unit (4); an outlet of the urea solution storage tank (2) is connected with an inlet of a urea solution delivery pump (3), and an outlet of the urea solution delivery pump (3) is respectively connected with a urea solution inlet of the regulating and metering unit (4) and a urea solution circulating inlet of the urea solution storage tank (2); the compressed air outlet of the adjusting and metering unit (4) is connected with the compressed air inlet of the injection unit, and the urea solution outlet of the adjusting and metering unit (4) is connected with the urea solution inlet of the injection unit; urea pyrolysis furnace (8) flue gas import exports and hot flue gas governing valve (6) exit linkage with cold wind governing valve (5) respectively, hot flue gas governing valve (6) import is drawn forth the mouth with the hot flue gas of boiler and is connected, cold wind governing valve (5) import and external atmosphere intercommunication, urea pyrolysis furnace (8) flue gas export is connected with fan (12) entry, and fan (12) export is connected with ammonia injection grid (10) import.
2. The gas turbine exhaust-heat boiler denitration system of claim 1, characterized in that: the concentration of ammonia gas discharged from the urea pyrolysis furnace (8) is lower than 5%; the mass concentration of the urea solution in the urea solution storage tank (2) is 35-50%.
3. The gas turbine exhaust-heat boiler denitration system of claim 1, characterized in that: the injection unit (7) comprises 1-6 double-fluid spray guns.
4. The gas turbine exhaust-heat boiler denitration system of claim 1, characterized in that: the adjusting and metering unit (4) comprises a urea solution adjusting valve, a urea solution flowmeter, a compressed air adjusting valve and an air flowmeter, the urea solution flowmeter is an electromagnetic flowmeter, an ultrasonic flowmeter or a rotor flowmeter, and the air flowmeter is a rotor flowmeter.
5. The gas turbine exhaust-heat boiler denitration system of claim 1, characterized in that: the catalyst of the catalyst unit (11) adopts a plate type or a honeycomb type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920551582.0U CN210057905U (en) | 2019-04-22 | 2019-04-22 | Denitration system of waste heat boiler of gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920551582.0U CN210057905U (en) | 2019-04-22 | 2019-04-22 | Denitration system of waste heat boiler of gas turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210057905U true CN210057905U (en) | 2020-02-14 |
Family
ID=69438364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920551582.0U Active CN210057905U (en) | 2019-04-22 | 2019-04-22 | Denitration system of waste heat boiler of gas turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210057905U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999661A (en) * | 2019-04-22 | 2019-07-12 | 山西华仁通电力科技有限公司 | A kind of gas-turbine waste heat boiler denitrating system and its course of work |
| CN111370735A (en) * | 2020-03-19 | 2020-07-03 | 浙江锋源氢能科技有限公司 | Fuel cell humidifying system |
-
2019
- 2019-04-22 CN CN201920551582.0U patent/CN210057905U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999661A (en) * | 2019-04-22 | 2019-07-12 | 山西华仁通电力科技有限公司 | A kind of gas-turbine waste heat boiler denitrating system and its course of work |
| CN111370735A (en) * | 2020-03-19 | 2020-07-03 | 浙江锋源氢能科技有限公司 | Fuel cell humidifying system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021184786A1 (en) | Urea direct-injection pyrolysis denitrification device arranged inside outlet flue duct of gas turbine | |
| CN113426296A (en) | Energy-saving urea hydrolysis ammonia preparation denitrification facility based on combustion engine SCR denitration | |
| CN210057905U (en) | Denitration system of waste heat boiler of gas turbine | |
| CN111637442B (en) | Configuration self-adaptive efficient flexible clean coal-fired power generation system and operation method | |
| CN209451639U (en) | A kind of denitrating flue gas ammonia gas supply system | |
| CN109404958B (en) | Energy-saving synergistic anti-blocking method and system based on bypass flue of air preheater | |
| CN113669748A (en) | Full-load denitration system and method adopting dividing wall type heat exchange coupling coal-fired boiler | |
| CN106823792B (en) | Full-load SCR flue gas denitration system | |
| CN210473607U (en) | Full-load SCR denitration system of coal-fired boiler | |
| CN216395900U (en) | Energy-saving urea hydrolysis ammonia preparation denitrification facility based on combustion engine SCR denitration | |
| CN114733341A (en) | System and method for preventing crystallization blockage of denitration urea pyrolysis furnace of gas turbine | |
| CN214106467U (en) | Ammonia gas flow regulating device and denitration system | |
| CN211837273U (en) | Arrange inside urea of combustion engine export flue and directly spout pyrolysis denitrification facility | |
| CN109999661A (en) | A kind of gas-turbine waste heat boiler denitrating system and its course of work | |
| CN212202148U (en) | Cold source energy-saving utilization device of thermal power plant | |
| CN111238039B (en) | Device for preventing boiler low-temperature corrosion by heat conduction oil heat storage and working method | |
| CN213032227U (en) | SCR flue gas denitration system for preparing ammonia by urea pyrolysis | |
| CN211988034U (en) | Denitration device of gas-steam combined cycle unit with ammonia water as reducing agent | |
| CN220159657U (en) | Flue gas denitration system of waste heat boiler of gas turbine | |
| CN203075835U (en) | Accident spraying system for preventing SCR (Selective Catalytic Reduction) denitration catalyst from overheating | |
| CN218774596U (en) | SCR denitration ammonia injection system | |
| CN112546864A (en) | SCR denitration system | |
| CN219691622U (en) | Ammonia supply pipeline heating system of combustion engine denitration urea hydrolyzer | |
| CN220677350U (en) | SCR denitration device for acid flue gas produced by pyrolysis of waste sulfuric acid | |
| CN220818604U (en) | Urea pyrolysis device and urea pyrolysis system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 208, Building 1, No. 118, Wuluo Street, Tanghuai Industrial Park, Transformation and Comprehensive Reform Demonstration Zone, Taiyuan City, Shanxi Province, 030000 Patentee after: Shanxi Huarentong Electric Power Technology Co.,Ltd. Address before: 030000 Room 210, Chuangye Building, Wuluo Street, Economic and Technological Development Zone, Taiyuan City, Shanxi Province Patentee before: SHANXI HUARENTONG ELECTRICAL TECHNOLOGY CO.,LTD. |