CN204193774U - A kind of denitrating flue gas metering module - Google Patents
A kind of denitrating flue gas metering module Download PDFInfo
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- CN204193774U CN204193774U CN201420498480.4U CN201420498480U CN204193774U CN 204193774 U CN204193774 U CN 204193774U CN 201420498480 U CN201420498480 U CN 201420498480U CN 204193774 U CN204193774 U CN 204193774U
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- Prior art keywords
- dilution water
- urea liquid
- pipeline
- pipe line
- flue gas
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Abstract
The utility model relates to a kind of denitrating flue gas metering module, comprise a urea liquid pipeline, a dilution water pipeline and for by urea and the mixed uniformly solution mixed pipe line of dilution water, the entrance of described urea liquid pipeline and dilution water pipeline docks with urea liquid high flow capacity loop module and dilution water module respectively; Described urea liquid pipeline is connected with the entrance of solution mixed pipe line after merging with the outlet of dilution water pipeline, and the outlet of this solution mixed pipe line is docked with distribution jet module; Described urea liquid pipeline is connected in series a manual ball valve A, a motor-driven valve A, a filter A, a Pressure gauge A, a manual ball valve B, a motor-driven valve B, a manual ball valve C and flow meters A with dilution water pipeline all successively along transmission direction.The utility model has the advantage of: this reducing agent mixing weighing modular structure is compact, function intensity is high, can accurate measurement and the control and participate in SNCR concentration of reductant solution of reacting and flow.
Description
Technical field
The utility model relates to a kind of denitrating flue gas reducing agent mixing weighing module, particularly a kind of denitrating flue gas metering module.
Background technology
Antipollution importance, have been carried out shrilly as worldwide problem.The development of producing along with modern industry and growth in the living standard, atmosphere pollution has become the problem that people extremely pay close attention to.
Sulfur dioxide is one of important pollution sources of air, its contamination hazard is very large, therefore in the seventies, research flue gas desulfurization technique is classified as the emphasis of Air Pollution prevention and control by many countries, in succession build up the treating apparatus of some plant-scale practicalities, meanwhile, to the large problem of another in atmosphere pollution, the i.e. pollution problem of nitrogen oxide NOX, people also start the research and development of Prevention Technique.NOX can cause photochemical reaction under the effect of sunlight, forms photochemical fog, thus causes serious atmosphere pollution.Since the seventies, the atmosphere polluting problem of NOX is by pay attention to day by day, it is found that: the injury of health, high-load nitric acid rain, photochemical fog, ozone reduction and some other problem all have relation with low concentration of NO X, and its harmfulness imagination more original than people is much bigger.
Denitrating flue gas, refers to that the NOX having generated is reduced to N2, thus removes the NOX in flue gas, can be divided into wet denitration and Dry denitration by Processing tecchnics.Mainly comprise: sour absorption process, alkali absorb method, selective catalytic reduction (SCR), SNCR method (SNCR), absorption method, gas ions activation method etc.Some scientific research personnel also developed the method processing NOX waste gas with microorganism both at home and abroad.
The out of stock technology of SNCR reaction principle: SNCR, also referred to as technology out of stock in stove, namely at a suitable temperature, utilizes the NH that urea pyrolysis produces
3gas or the ammoniacal liquor after directly using dilution, as reducing agent, are taken the circumstances into consideration to spray in flue gas according to real-time combustion conditions, are produced nitrogen and water after carrying out abundant reduction reaction with nitrogen oxides in effluent.SNCR technology popular at present mainly adopts two class reducing agents: urea and ammoniacal liquor urea CO (NH
2)
2suitable reaction temperature be: 900-1050 DEG C, ammoniacal liquor NH
3.H
2the suitable reaction temperature of 0 is: 800-1000 DEG C of main reduction reaction formula:
Ammoniacal liquor: 4NH
3+ 4NO+O
2=4N
2+ 6H
2o
Urea: CO (NH
2)
2+ 2NO+1/2 O
2=2N
2+ CO
2+ H
2o;
Ammoniacal liquor SNCR technology relatively preferably as seen from the above, because ammoniacal liquor reaction is more direct, chemical reaction efficiency is higher, NO
xclearance is higher, and amount of ammonia slip is lower.And the relative ammoniacal liquor of urea, react more complicated, in reaction, easily generate harmful substance laughing gas N
2o (strong greenhouse gas) and CO, simultaneously NO
xclearance is lower, and amount of ammonia slip is then higher.The advantage of urea is to store very safe, and market purchasing is easy, and buying expenses is slightly low, but runtime system needs companion's heat and insulation, and both actual motion costs of comparing are very nearly the same.
SNCR flue gas denitrification system mainly comprises dilution water module, urea liquid high flow capacity loop module, urea liquid counterbalance valve group module, solution reduction agent mixing weighing module and distributes jet module.
Solution reduction agent mixing weighing module is one of core apparatus of denitration control, and its effect is concentration and the flow of the reductant solution that accurate measurement and control and participate in SNCR react.
Current reducing agent mixing weighing module, complex structure, dilution water mixes uneven with urea liquid, make injection concentration, the emitted dose that accurately can not control urea liquid, makes the controlling of denitrating system to denitration efficiency, the escaping of ammonia lower.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of good mixing effect, can accurate measurement and the denitrating flue gas metering module controlling reductant solution concentration.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of denitrating flue gas metering module, its innovative point is: comprise a casing, an integrated urea liquid pipeline in this casing, a dilution water pipeline and are for by urea and the mixed uniformly solution mixed pipe line of dilution water, and the entrance of described urea liquid pipeline and dilution water pipeline docks with urea liquid high flow capacity loop module and dilution water module respectively; Described urea liquid pipeline is connected with the entrance of solution mixed pipe line after merging with the outlet of dilution water pipeline, and the outlet of this solution mixed pipe line is docked with distribution jet module.
Further, described urea liquid pipeline is connected in series a manual ball valve A, a motor-driven valve A, a filter A, a Pressure gauge A, a manual ball valve B, a motor-driven valve B, a manual ball valve C and flow meters A with dilution water pipeline all successively along transmission direction, between Pressure gauge A with flowmeter A, an also bypass in parallel, this bypass is provided with manual ball valve D.
Further, described solution mixed pipe line is connected in series a Pressure gauge B, a pressure display transformer, a blender and a motor-driven valve C successively along transmission direction.
Further, described blender is the body of a 450*110.
The utility model has the advantage of:
1. this reducing agent mixing weighing modular structure is compact, urea liquid pipeline, dilution water pipeline and solution mixed pipe line are integrated into unified reducing agent mixing weighing module, function intensity is high, Row control is more clear, facilitate engineer applied, can accurate measurement and the control and participate in SNCR concentration of reductant solution of reacting and flow;
2. urea liquid pipeline and dilution water pipeline are provided with Pressure gauge and flowmeter, the pressure on urea liquid pipeline and dilution water pipeline and flow can be monitored in real time, as the foundation that SNCR entire system controls, feed back to system corresponding module, carry out adjustment in time and control; Urea liquid pipeline and dilution water manage and are provided with bypass, can switch to bypass in time when breaking down or overhaul, and improve system run all right, ensure security of system reliability service;
3. mixed solution pipeline arranges blender, make the dilution water that transmits and urea form turbulent flow, mixed effect is better, make reductant solution concentration evenly, thus be conducive to accurate measurement and control concentration and the flow of reductant solution; On mixed solution pipeline, be also provided with Pressure gauge and pressure display transformer simultaneously, the pressure on mixed solution pipeline can be monitored in real time, as the foundation that SNCR entire system controls, feed back to system corresponding module, carry out adjustment in time and control;
4. blender is a body, and its structure is simple, while ensureing mixed effect, reduces production cost.
Accompanying drawing explanation
Fig. 1 is the spreading principle figure of a kind of denitrating flue gas metering module of the utility model.
Fig. 2 is the structural representation of a kind of denitrating flue gas metering module of the utility model.
Fig. 3 is the enlarged drawing in A portion in Fig. 2.
Fig. 4 is the front view of a kind of NCR flue gas denitrification system of the utility model reducing agent mixing weighing module.
Fig. 5 is the side view of a kind of NCR flue gas denitrification system of the utility model reducing agent mixing weighing module.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, Figure 2 and Figure 3, a kind of denitrating flue gas metering module of the utility model, comprise a casing 5, in this casing, integrated urea liquid pipeline 1, dilution water pipeline 2 and is for by urea and the mixed uniformly solution mixed pipe line 3 of dilution water, and urea liquid line entry 11 and dilution water line entry 21 dock with urea liquid high flow capacity loop module and dilution water module respectively; Urea liquid tube outlet 12 is connected with solution mixed pipe line entrance 31 after merging with dilution water tube outlet 22, and this solution mixed pipe line outlet 32 is docked with distribution jet module;
In the present embodiment,
Above-mentioned urea liquid pipeline 1 is connected in series a manual ball valve A13, a motor-driven valve A14, a filter A15, a Pressure gauge A16, a manual ball valve B17, a motor-driven valve B18, a manual ball valve C19 and flow meters A101 with dilution water pipeline 2 all successively along transmission direction; Wherein the referring to of Pressure gauge A16 and flowmeter A101, is convenient to monitor urea liquid pipeline 1 and the pressure on dilution water pipeline 2 and flow in real time, as the foundation that SNCR entire system controls, feeds back to system corresponding module, carry out adjustment in time and control;
In order to improve system run all right, ensure security of system reliability service, between Pressure gauge A16 with flowmeter A101, an also bypass 102 in parallel, this bypass 102 being provided with manual ball valve D103, can switching to this bypass 102 in time when breaking down or overhaul;
Above-mentioned solution mixed pipe line 3 is connected in series a Pressure gauge B31, pressure display transformer 32, blender 33 and a motor-driven valve C34 successively along transmission direction; Wherein the dilution water transmitted and urea are formed turbulent flow by blender 33, improve mixed effect, make reductant solution concentration evenly, thus be conducive to accurate measurement and control the concentration of reductant solution and flow; On mixed solution pipeline, be also provided with Pressure gauge and pressure display transformer simultaneously, the pressure on mixed solution pipeline can be monitored in real time, as the foundation that SNCR entire system controls, feed back to system corresponding module, carry out adjustment in time and control;
In order to ensure the mixed effect of blender, blender 33 is the body of a 450*110;
In order to realize controlling, said electric valve A14, filter A15, motor-driven valve B18, flow meters A101, pressure display transformer 32, blender 33 and a motor-driven valve C34 control by electric control cabinet 4.
During installation, as shown in Figure 4 and Figure 5, urea liquid line entry and dilution water line entry are docked with urea liquid high flow capacity loop module and dilution water module respectively, the outlet of solution mixed pipe line is docked can complete installment work with distribution jet module;
During work, bypass is in closed condition, urea liquid line entry and dilution water line entry pass into urea and dilution water respectively, transfer to solution mixed pipe line, during blender, urea and dilution water form turbulent flow, and make urea and dilution water Homogeneous phase mixing, obtain the reductant solution of even concentration, realize the concentration of reductant solution and flow accurate measurement and control;
During maintenance, open manual ball valve D, then close manual ball valve B, a motor-driven valve B and a manual ball valve C in parallel with bypass successively, bypass can normally work, and can ensure security of system stable operation.
Claims (4)
1. a denitrating flue gas metering module, it is characterized in that: comprise a casing, an integrated urea liquid pipeline in this casing, a dilution water pipeline and are for by urea and the mixed uniformly solution mixed pipe line of dilution water, and the entrance of described urea liquid pipeline and dilution water pipeline docks with urea liquid high flow capacity loop module and dilution water module respectively; Described urea liquid pipeline is connected with the entrance of solution mixed pipe line after merging with the outlet of dilution water pipeline, and the outlet of this solution mixed pipe line is docked with distribution jet module.
2. denitrating flue gas metering module according to claim 1, it is characterized in that: described urea liquid pipeline is connected in series a manual ball valve A, a motor-driven valve A, a filter A, a Pressure gauge A, a manual ball valve B, a motor-driven valve B, a manual ball valve C and flow meters A with dilution water pipeline all successively along transmission direction, between Pressure gauge A with flowmeter A, an also bypass in parallel, this bypass is provided with manual ball valve D.
3. denitrating flue gas metering module according to claim 1, is characterized in that: described solution mixed pipe line is connected in series a Pressure gauge B, a pressure display transformer, a blender and a motor-driven valve C successively along transmission direction.
4. denitrating flue gas metering module according to claim 3, is characterized in that: described blender is the body of a 450*110.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420498480.4U CN204193774U (en) | 2014-09-01 | 2014-09-01 | A kind of denitrating flue gas metering module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420498480.4U CN204193774U (en) | 2014-09-01 | 2014-09-01 | A kind of denitrating flue gas metering module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204193774U true CN204193774U (en) | 2015-03-11 |
Family
ID=52651775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420498480.4U Expired - Fee Related CN204193774U (en) | 2014-09-01 | 2014-09-01 | A kind of denitrating flue gas metering module |
Country Status (1)
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|---|---|
| CN (1) | CN204193774U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113368681A (en) * | 2021-06-17 | 2021-09-10 | 华能太原东山燃机热电有限责任公司 | Flue gas nitrogen oxide control method for combined cycle unit waste heat boiler |
-
2014
- 2014-09-01 CN CN201420498480.4U patent/CN204193774U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113368681A (en) * | 2021-06-17 | 2021-09-10 | 华能太原东山燃机热电有限责任公司 | Flue gas nitrogen oxide control method for combined cycle unit waste heat boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20190901 |