CN212215125U - Gas monitoring device for thermal power generation boiler - Google Patents
Gas monitoring device for thermal power generation boiler Download PDFInfo
- Publication number
- CN212215125U CN212215125U CN202020203310.4U CN202020203310U CN212215125U CN 212215125 U CN212215125 U CN 212215125U CN 202020203310 U CN202020203310 U CN 202020203310U CN 212215125 U CN212215125 U CN 212215125U
- Authority
- CN
- China
- Prior art keywords
- gas
- monitoring device
- flue gas
- thermal power
- power generation
- 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
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model provides a gas monitoring device for a thermal power generation boiler, belonging to the technical field of thermal power generation; the gas monitoring device is arranged in front of the denitration and desulfurization equipment and is connected with the main flue gas discharge pipeline; the gas monitoring device comprises a flue gas pipeline, and a water circulation cooling box, a temperature sensor, a one-way air suction pump and a gas sensor are sequentially arranged between the air inlet end and the air outlet end of the flue gas pipeline. Above-mentioned scheme, gas monitoring devices can be according to the nitrogen oxide and the sulfur dioxide concentration that detect, and the supplementary regulation and control boiler inputs parameters such as fuel speed, wind speed, temperature, pressure to carry out accurate SOx/NOx control, reduce the excessive degree of ammonia and catalyst, reach nitrogen oxide, sulfur dioxide, the environmental protection requirement that the ammonia discharged when saving the cost, reduce among the combustion process SO3 and excessive ammonia and generate NH4HSO4, improve the life of afterbody flue equipment, accord with actual demand.
Description
Technical Field
The utility model relates to a thermal power technical field especially indicates a gas monitoring devices for thermal power boiler.
Background
At present, thermal power generation is still the main way to ensure electricity utilization of society, residents, industry and the like, and a circulating fluidized bed boiler is the most widely used facility of a thermal power plant. Since coal generates a large amount of harmful gases (mainly nitrogen oxides and sulfur dioxide) when it is burned in the circulating fluidized bed boiler, desulfurization and denitrification of the discharged gases are required. The desulfurization process mainly comprises the steps that high-temperature flue gas is mixed with lime slurry in a turbulent bed, and sulfur dioxide in the flue gas is absorbed to generate solid particles; the denitration process mainly uses a catalyst (such as TiO2) and ammonia (NH3) to react with nitrogen oxides.
In order to guarantee that harmful gas discharged into the air can reach the environmental protection requirement, normally monitor nitrogen oxide and sulfur dioxide concentration after SOx/NOx control, if not up to standard, will increase SOx/NOx control's intensity. However, this approach has the following problems: (1) the timeliness is poor, a certain time delay exists between the monitoring that the harmful gas does not meet the emission standard and the increasing of the desulfurization and denitrification intensity, and a large amount of harmful gas is emitted into the air in the period; (2) the ammonia water and the catalyst are excessive, the ammonia water is excessive due to the fact that the strength of desulfurization and denitrification is increased, the ammonia gas is also a harmful gas, the monitoring of the ammonia gas is not considered in the emission of the harmful gas, the ammonia gas is also polluted when being emitted into the air, and in addition, the catalyst poisoning phenomenon cannot be ignored; (3) the flue equipment is easy to damage, a certain amount of SO3 and excessive ammonia gas are generated in the combustion process to generate NH4HSO4, and NH4HSO4 is corrosive and sticky and can cause damage to the tail flue equipment.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a gas monitoring device for thermal power boiler carries out the problem of monitoring the method ageing relatively poor, aqueous ammonia and catalyst are excessive and damage flue equipment easily with solving again nitrogen oxide and sulfur dioxide concentration after present SOx/NOx control.
In order to solve the technical problem, the utility model provides a following technical scheme:
a gas monitoring device for a thermal power generation boiler is arranged in front of denitration and desulfurization equipment and is connected with a main flue gas discharge pipeline; the gas monitoring device comprises a flue gas pipeline, and a water circulation cooling box, a temperature sensor, a one-way air suction pump and a gas sensor are sequentially arranged between the air inlet end and the air outlet end of the flue gas pipeline.
Wherein the gas sensor comprises a nitrogen oxide sensor and a sulfur dioxide sensor.
Wherein, the inlet end and the exhaust end of the flue gas pipeline are both connected with the main flue gas discharge pipeline.
Wherein, the inlet end and the exhaust end of flue gas pipeline all are provided with the ball valve.
Preferably, the flue gas pipeline is bent in a snake-shaped reciprocating manner in the water circulation cooling box.
Furthermore, the water circulation cooling box is provided with a water inlet and a water outlet, wherein the water inlet is arranged at a corner part close to the air inlet end of the flue gas pipeline, and the water outlet and the water inlet are arranged diagonally.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
in the above-mentioned scheme, gas monitoring devices can be based on the nitrogen oxide and the sulfur dioxide concentration that detect, and the supplementary regulation and control input fuel speed, wind speed, temperature, pressure isoparametric in the boiler to carry out accurate SOx/NOx control, reduce the excessive degree of ammonia water and catalyst, reach nitrogen oxide, sulfur dioxide, the environmental protection requirement that the ammonia discharged when saving the cost, reduce among the combustion process SO3 and excessive ammonia and generate NH4HSO4, improve the life of afterbody flue equipment, accord with actual demand.
Drawings
Fig. 1 is a schematic position diagram of a gas monitoring device according to the present invention;
fig. 2 is a schematic structural diagram of the gas monitoring device of the present invention.
[ reference numerals ]
1. A water circulation cooling tank;
2. a flue gas duct;
3. a water inlet;
4. a ball valve;
5. a main flue gas discharge pipeline;
6. a water outlet;
7. a temperature sensor;
8. a one-way air pump;
9. a gas sensor.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the embodiment of the utility model provides a gas monitoring device for thermal power boiler sets up before denitration storehouse and desulfurization storehouse, is connected with main pipe 5 of flue gas emission. The gas monitoring device comprises a high-temperature-resistant flue gas pipeline 2, and the gas inlet end and the gas outlet end of the flue gas pipeline 2 are welded with a flue gas discharge main pipeline 5. And a water circulation cooling box 1, a temperature sensor 7, a one-way air pump 8 and a gas sensor 9 are sequentially arranged between the air inlet end and the air outlet end of the flue gas pipeline 2.
Wherein, water circulative cooling case 1 cools off high temperature flue gas, temperature sensor 7 is used for detecting the temperature of flue gas, avoids the high temperature, damages gas sensor 9. The one-way air pump 8 is used for realizing the circulation of the flue gas in the flue gas pipeline 2 and meeting the requirement of controlling the air pumping speed at multiple gears so as to control the temperature of the flue gas in the flue gas pipeline 2. The gas sensor 9 comprises a nitrogen oxide sensor and a sulfur dioxide sensor, and is used for detecting the concentration of nitrogen oxide and sulfur dioxide and providing a basis for subsequent quantitative treatment of desulfurization and denitrification.
Specifically, the temperature sensor 7 is a 300 ℃ high-temperature type temperature sensor of Beijing Huaxia Rinsheng science and technology Limited, and has the product characteristics that: importing a Japanese/Germany platinum resistance element chip with high precision; the product performance meets the related standards of IEC and JIS; the appearance design conforms to all regulations of the temperature measurement platinum resistor; the temperature measuring range is-50 ℃ to 450 ℃; the use temperature is as follows: -50 ℃ to 350 ℃; long-term working temperature: at 300 ℃.
The one-way air pump 8 adopts a TWYX Xinxin industrial high-temperature-resistant air pump, and has the product characteristics that: the aluminum shell is slightly worn; regulating and controlling wind speed in multiple gears; working temperature range: -20 ℃ to 350 ℃.
The nitrogen oxide sensor adopts JSA5-NOX fixed nitrogen oxide detector of Shenzhen Shenshun's science and technology Limited company, and the product characteristics are as follows: the early warning device is used for detecting the gas concentration of the nitrogen oxide and carrying out overproof concentration early warning; the method has the advantages of stable signal, high sensitivity and high accuracy; the explosion-proof wiring mode is suitable for various dangerous places.
The sulfur dioxide sensor adopts British alphasense high-resolution sulfur dioxide sensor-sulfur dioxide-B4, and has the product characteristics that: resolving up to 5 ppb; the precision is high; the linearity is good.
Wherein, the equal screw thread in inlet end and the exhaust end department of flue gas pipeline 2 is provided with ball valve 4, is convenient for control flue gas pipeline 2 closes.
As shown in fig. 2, the flue gas duct 2 is bent in a serpentine reciprocating manner in the water circulation cooling tank 1 to increase the contact area and enhance the cooling effect. And the joint of the flue gas pipeline 2 and the box body of the water circulation cooling box 1 is sealed.
Wherein, the water circulation cooling tank 1 is provided with a water inlet 3 and a water outlet 6 to realize the water circulation function. As shown in fig. 2, the water inlet 3 is arranged at a corner close to the air inlet end of the flue gas pipeline 2, in particular, transversely arranged at the lower left side of the water circulation cooling tank 1; the water outlet 6 and the water inlet are arranged diagonally, and specifically, the right side of the top of the water circulation cooling tank 1 is vertically arranged.
The utility model provides a gas monitoring device working process as follows:
1. before the device began to operate, close ball valve 4 with flue gas pipeline 2 inlet end and exhaust end, the leakproofness of inspection water circulative cooling case 1, timing temperature sensor 7, one-way aspiration pump 8, nitrogen oxide sensor and sulfur dioxide sensor.
2. After the inspection is qualified and the adjustment is finished, the water circulation cooling box 1 is continuously injected with water through the water inlet 3 until the water flows out from the water outlet 6, and water circulation is formed.
3. The ball valve 4 at the air inlet end of the flue gas pipeline 2 is opened, then the low speed gear of the one-way air pump 8 is started, the flue gas is pumped to the right end, the water circulation cooling box 1 cools the flue gas, and then the ball valve 4 at the exhaust end of the flue gas pipeline 2 is opened.
4. The flue gas passes through temperature sensor 7 after the cooling, compares the temperature value that temperature sensor 7 measured with the temperature resistant value of nitrogen oxide sensor and sulfur dioxide sensor, if the measured temperature value is lower, suitably improves the speed shelves of one-way aspiration pump 8, still guarantees that the measured temperature value is less than the temperature resistant value of nitrogen oxide sensor and sulfur dioxide sensor.
5. After the device operates stably, the nitrogen oxide concentration and the sulfur dioxide concentration measured by the nitrogen oxide sensor and the sulfur dioxide sensor are utilized to provide a basis for the subsequent quantitative treatment of desulfurization and denitrification.
The utility model provides a gas monitoring device is when needs are maintained, at first closes one-way aspiration pump 8, then closes the ball valve 4 of 2 inlet ends of flue gas pipeline and exhaust end, stops at last to 3 water injections of water inlet, can carry out the maintenance, and is simple and understandable, convenient operation accords with actual need.
In the above-mentioned scheme, gas monitoring devices can be based on the nitrogen oxide and the sulfur dioxide concentration that detect, and the supplementary regulation and control input fuel speed, wind speed, temperature, pressure isoparametric in the boiler to carry out accurate SOx/NOx control, reduce the excessive degree of ammonia water and catalyst, reach nitrogen oxide, sulfur dioxide, the environmental protection requirement that the ammonia discharged when saving the cost, reduce among the combustion process SO3 and excessive ammonia and generate NH4HSO4, improve the life of afterbody flue equipment, accord with actual demand.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A gas monitoring device for a thermal power generation boiler is characterized in that the gas monitoring device is arranged in front of denitration and desulfurization equipment and is connected with a main flue gas discharge pipeline; the gas monitoring device comprises a flue gas pipeline, and a water circulation cooling box, a temperature sensor, a one-way air suction pump and a gas sensor are sequentially arranged between the air inlet end and the air outlet end of the flue gas pipeline.
2. The gas monitoring apparatus for a thermal power generation boiler according to claim 1, wherein the gas sensor includes a nitrogen oxide sensor and a sulfur dioxide sensor.
3. The gas monitoring device for a thermal power generation boiler according to claim 1, wherein both the gas inlet end and the gas outlet end of the flue gas duct are connected to the main flue gas discharge duct.
4. The gas monitoring device for a thermal power generation boiler according to claim 3, wherein ball valves are provided at both the inlet end and the outlet end of the flue gas duct.
5. The gas monitoring device for a thermal power generation boiler according to claim 1, wherein the flue gas duct is bent in a serpentine shape to and fro in the water-circulating cooling tank.
6. The gas monitoring device for a thermal power generation boiler according to claim 1, wherein the water circulation cooling tank is provided with a water inlet and a water outlet, wherein the water inlet is provided at a corner portion near the gas inlet end of the flue gas duct, and the water outlet is provided diagonally to the water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020203310.4U CN212215125U (en) | 2020-02-24 | 2020-02-24 | Gas monitoring device for thermal power generation boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020203310.4U CN212215125U (en) | 2020-02-24 | 2020-02-24 | Gas monitoring device for thermal power generation boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212215125U true CN212215125U (en) | 2020-12-25 |
Family
ID=73913934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020203310.4U Active CN212215125U (en) | 2020-02-24 | 2020-02-24 | Gas monitoring device for thermal power generation boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212215125U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341080A (en) * | 2021-08-06 | 2021-09-03 | 国网浙江省电力有限公司营销服务中心 | Carbon emission monitoring and alarming system for power production |
-
2020
- 2020-02-24 CN CN202020203310.4U patent/CN212215125U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341080A (en) * | 2021-08-06 | 2021-09-03 | 国网浙江省电力有限公司营销服务中心 | Carbon emission monitoring and alarming system for power production |
| CN113341080B (en) * | 2021-08-06 | 2021-10-26 | 国网浙江省电力有限公司营销服务中心 | Carbon emission monitoring and alarming system for power production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205392185U (en) | Gas boiler catalytic denitrification system | |
| CN104785105A (en) | Small-scale SCR (selective catalytic reduction) flue gas denitration ammonia injection control system and method | |
| CN104296543A (en) | Denitration and waste heat recovery integrated furnace | |
| CN212215125U (en) | Gas monitoring device for thermal power generation boiler | |
| CN103885337B (en) | A kind of low nitrogen burning optimal N Ox discharge capacity control method based on cost calculation | |
| CN113740090A (en) | Air preheater anti-blocking method and system for thermal power plant | |
| CN206740607U (en) | The monitor control system of high-temperature corrosion of power station boiler | |
| CN107703875A (en) | One kind eliminates white cigarette control system and method | |
| CN204891590U (en) | Energy -efficient deNOx systems of domestic waste power plant | |
| CN211098339U (en) | Flue gas deep denitration device for coal-fired boiler | |
| CN205246422U (en) | Sulfur trioxide's preprocessing device in flue gas | |
| CN203316011U (en) | Structure for improving coal-fired boiler tail smoke denitration input rate | |
| CN213314325U (en) | SCR denitration system of coal-fired boiler | |
| CN204987054U (en) | A hierarchical heat transfer device for wet flue gas desulfurization system | |
| CN201269539Y (en) | Intelligent control system of biomass fuel boiler | |
| CN211978686U (en) | Low-concentration sulfur trioxide gas on-line measuring device | |
| CN208122979U (en) | A kind of device handling organic exhaust gas | |
| CN210079221U (en) | Blowing gas flue gas denitration device | |
| CN112360599A (en) | SCR injection control system for power generation internal combustion engine based on air inflow | |
| CN208212901U (en) | A kind of flue gas ammonia flow-disturbing mixed structure | |
| CN207778478U (en) | A kind of classification economizer feed water by-pass temperature-raising device | |
| CN106556028A (en) | A kind of coal unit boiler combustion runs comprehensive optimization system with denitration | |
| CN112212704A (en) | Flue gas recirculation combustion control device of carbon roasting furnace | |
| CN104699941A (en) | Unit economy based analysis method for evaluation index of boiler NOX emission | |
| CN212927979U (en) | Test bench for testing catalytic activity of SCR catalyst |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |