CN205095626U - Flue gas purification device - Google Patents
Flue gas purification device Download PDFInfo
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- CN205095626U CN205095626U CN201520780293.XU CN201520780293U CN205095626U CN 205095626 U CN205095626 U CN 205095626U CN 201520780293 U CN201520780293 U CN 201520780293U CN 205095626 U CN205095626 U CN 205095626U
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- flue gas
- tower
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- denitrating
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Abstract
The utility model relates to a flue gas purification device for gas cleaning. The utility model discloses a flue gas purification device includes the denitrating tower and locates the outside oxidizing agent storage tank of denitrating tower, the bottom of denitrating tower is equipped with the tower cauldron, in the denitrating tower, be located the top of tower cauldron by down supreme be equipped with in proper order be used for spraying the oxidant a layer A spray, be used for spraying the desulfurization accessory substance spray layer B and defogging layer, the tower cauldron with it is equipped with flue gas inlet to spray between layer A, flue gas inlet is located on the tower wall of denitrating tower, the top of denitrating tower is equipped with the exhanst gas outlet, spray a layer A pass through the pipeline with the oxidizing agent storage tank intercommunication, spray layer B through external circulating pump with tower cauldron intercommunication. Adopt the utility model discloses a when flue gas purification device purified the flue gas, denitration efficiency was higher.
Description
Technical field
The utility model relates to a kind of smoke eliminator, is specifically related to a kind of smoke eliminator adopting wet denitration.
Background technology
Gas denitrifying technology mainly contains three kinds: SCR, SNCR and catalytic oxidation/reducing process, the former two belongs to dry method, and the latter belongs to wet method.At present, applying maximum is SCR method.But SCR method exists following problem: engineering cost is extremely expensive, operating cost is also very high, and floor space is large; Liquefied ammonia used is national secondary threat product, and management maintenance requires strict; The solid catalyst refuse difficult treatment produced; Ammonium sulfate, ammonium bisulfite etc. that side reaction produces easily adhere at air preheater surfaces, affect the heat-transfer effect of air preheater; After flue gas flows through SCR catalyst, the sulfur trioxide concentration in flue gas increases, and follow-up wet desulphurisation system is to its removal ability very low (as spray column is almost nil), causes the sulphur total amount of discharging in flue gas to increase; During to old boiler improvement, need transform flue, air preheater, difficulty is large, costly; For China's high-sulfur, ash coal, the wearing and tearing of catalyst, the problem such as poisoning also increase greatly, have a strong impact on the service life of catalyst and the security of operation of boiler.
Utility model content
The purpose of this utility model is overcome above-mentioned the deficiencies in the prior art part and provide the smoke eliminator that a kind of denitration efficiency is higher.
For achieving the above object, the technical scheme that the utility model is taked is: a kind of smoke eliminator, it oxidant storage tank comprising denitrating tower and be located at described denitrating tower outside, the bottom of described denitrating tower is provided with tower reactor, in described denitrating tower, the top that is positioned at described tower reactor is provided with spraying layer A for spraying oxidant, from the bottom to top successively for spraying spraying layer B and the demist layer of desulfurizing byproduct, gas approach is provided with between described tower reactor and described spraying layer A, described gas approach is positioned on the tower wall of described denitrating tower, and the top of described denitrating tower is provided with exhanst gas outlet; Described spraying layer A is communicated with described oxidant storage tank by pipeline; Described spraying layer B is communicated with described tower reactor by external circulating pump.
Smoke eliminator of the present utility model also can comprise desulfurizing tower, and desulfurizing tower is connected by flue between tower with denitrating tower.During smoke eliminator of the present utility model work, the flue gas through pre-desulfurization process is entered by gas approach, when rising to spraying layer A, by spraying layer A spray oxidizing, the NO in flue gas is oxidized to NO
2, complete flue gas pre-oxidation; After oxidized flue gas continues to rise to spraying layer B, the NO in flue gas
2the desulfurizing byproduct sodium sulfite sprayed with spraying layer B reacts, and produces nitrogen and sodium sulphate, realizes denitration; Flue gas after denitration rises to demist layer, then discharges through exhanst gas outlet.
Wherein, described oxidant is placed in oxidant storage tank, arrives spraying layer A (region at spraying layer A place is zoneofoxidation) through pipeline; Described desulfurizing byproduct is placed in the tower reactor of denitrating tower, arrives spraying layer B (region at spraying layer B place is denitration region) by tower reactor through circulating pump.
As the preferred embodiment of smoke eliminator described in the utility model, described pipeline is provided with oxidation pump.
As the preferred embodiment of smoke eliminator described in the utility model, described pipeline is provided with measuring pump and flowmeter.The adjustable flue gas quantity delivered of measuring pump, flowmeter is for recording flue gas quantity delivered.
As the preferred embodiment of smoke eliminator described in the utility model, described spraying layer A and described spraying layer B includes shower and is located at the nozzle on described shower.More preferably, described nozzle is streamlined.Streamline Nozzles is conducive to the spray area increasing shower.
As the preferred embodiment of smoke eliminator described in the utility model, described spraying layer A and described spraying layer B is 2 ~ 6 layers.
As the preferred embodiment of smoke eliminator described in the utility model, the tower body of described denitrating tower is cylindrical shape.
The method adopting above-mentioned smoke eliminator to carry out gas cleaning is:
(1) flue gas pre-desulfurization process: adopt desulfurizing agent to carry out pre-desulfurization process to flue gas, make the concentration of sulfur dioxide in flue gas be down to 300mg/Nm
3below;
(2) pre-oxidation treatment: will, through the flue gas of the pre-desulfurization process of step (1) and oxidant haptoreaction at 450 ~ 800 DEG C of temperature, make the oxidation of nitric oxide in flue gas be nitrogen dioxide;
(3) denitration process: through the flue gas of step (2) pre-oxidation treatment and desulfurizing byproduct haptoreaction, the nitrogen dioxide in flue gas will be absorbed.
In said method, desulfurizing byproduct is gained after the middle pre-desulfurization process of flue gas of step (1).The utility model adopts oxidant, is nitrogen dioxide by the oxidation of nitric oxide in the flue gas of desulfurization process; Flue gas, after oxidation processes, contacts with desulfurizing byproduct, and the sodium sulfite that nitrogen dioxide is desulfurized in accessory substance is reduced into nitrogen, and the sodium sulfite in desulfurizing byproduct can enter waste water system after being oxidized to sodium sulphate processes.Adopt above-mentioned flue gas purifying method, denitration process can be carried out to flue gas, meanwhile, also can reduce the sulfur content in flue gas.
As the preferred embodiment of flue gas purifying method described in the utility model, in described step (2), oxidant is sodium chlorite or clorox; In described step (3), containing sodium sulfite in desulfurizing byproduct.
As the preferred embodiment of flue gas purifying method described in the utility model, in described step (2), flue gas and oxidant haptoreaction at 650 DEG C of temperature.Temperature affects the reaction efficiency of flue gas and oxidant, if temperature is too low, oxidant reaction is incomplete, and oxidant may be caused to leak; And temperature is too high, NO is then easily oxidized to NOx, counteracts the removal efficiency of oxidant.Too high or too low for temperaturely all can cause the loss of reducing agent and the decline of NOx removal efficiency.Research shows, 650 DEG C is the optimum temperature of flue gas and oxidant reaction.
The beneficial effects of the utility model are:
1. smoke eliminator of the present utility model comprises the spraying layer A for spraying oxidant and the spraying layer B for spraying desulfurizing byproduct, and at spraying layer A, the NO in flue gas is oxidized to NO
2, at spraying layer B, the NO in flue gas
2can react with desulfurizing byproduct, so not only with the object reaching denitration, can also reduce the sulfur content in desulfurizing byproduct further.After treatment, flue gas reaches more than 95% desulfuration efficiency, more than 95% denitration effect;
2. the pipeline between the utility model oxidant storage tank and spraying layer A is provided with measuring pump and flowmeter, can record more easily like this and regulate flue gas quantity delivered;
3. the utility model equipment resistance reduces greatly, is low to moderate below 1800Pa;
4. the utility model is highly suitable for process boilers, and cost is extremely low, and desulfurization and dedusting, denitration operating cost are less than 8 yuan/m
3steam.
Accompanying drawing explanation
Fig. 1 is the structural representation of smoke eliminator described in the utility model.
Wherein, 1 is tower reactor, and 2 is gas approach, and 3 is spraying layer A, and 4 is spraying layer B, and 5 is demist layer, and 6 is exhanst gas outlet, and 7 is circulating pump, and 8 is oxidant storage tank, and 9 is measuring pump, and 10 is flowmeter.
Detailed description of the invention
For the purpose of this utility model, technical scheme and advantage are described better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment 1
As shown in Figure 1, a kind of smoke eliminator of the utility model embodiment, it oxidant storage tank 8 comprising denitrating tower and be located at denitrating tower outside, the bottom of denitrating tower is provided with tower reactor 1, in denitrating tower, the top that is positioned at tower reactor 1 is provided with spraying layer A3 for spraying oxidant, from the bottom to top successively for spraying spraying layer B4 and the demist layer 5 of desulfurizing byproduct, gas approach 2 is provided with between tower reactor 1 and spraying layer A3, gas approach 2 is positioned on the tower wall of denitrating tower, and the top of denitrating tower is provided with exhanst gas outlet 6; Spraying layer A3 is communicated with oxidant storage tank 8 by pipeline; Spraying layer B4 is communicated with tower reactor 1 by external circulating pump 7.Wherein, oxidant is placed in oxidant storage tank 8, and arrive spraying layer A3 through pipeline, desulfurizing byproduct is placed in the tower reactor 1 of denitrating tower, arrives spraying layer B4 by tower reactor 1 through circulating pump 7.
During the work of above-mentioned smoke eliminator, flue gas is entered by gas approach 2, when rising to spraying layer A3, by spraying layer A3 spray oxidizing, the NO in flue gas is oxidized to NO
2, complete flue gas pre-oxidation; After oxidized flue gas continues to rise to spraying layer B4, the NO in flue gas
2the desulfurizing byproduct sodium sulfite sprayed with spraying layer B reacts, and produces nitrogen and sodium sulphate, realizes denitration; Flue gas after denitration rises to demist layer 5, then discharges through exhanst gas outlet 6.Thus, not only can with realize denitration, the sulfur content in desulfurizing byproduct can also be reduced further.
For the ease of record and adjustment flue gas quantity delivered, the pipeline between spraying layer A3 and oxidant storage tank 8 is provided with measuring pump 9 and flowmeter 10.
Further, spraying layer A3 and spraying layer B4 includes shower and is located at the nozzle (structure of shower and nozzle is prior art, figure does not draw the structure of shower and nozzle) on shower.Further, in order to increase the spray area of shower, nozzle is preferably streamlined.
It is noted that spraying layer A and spraying layer B all can be multilayer, consider effect and the Cost Problems of spray, spraying layer A and spraying layer B is all preferably 2 ~ 6 layers, and namely spraying layer A and spraying layer B can be 2,3,4,5 or 6 layers.In the present embodiment, spraying layer A3 is 3 layers, and spraying layer B4 is 2 layers.
Preferably, the tower body of denitrating tower is cylindrical shape.
The method adopting said apparatus to carry out gas cleaning is:
(1) flue gas pre-desulfurization process: adopt desulfurizing agent to carry out pre-desulfurization process to flue gas, make the concentration of sulfur dioxide in flue gas be down to 300mg/Nm
3below;
(2) pre-oxidation treatment: will, through the flue gas of the pre-desulfurization process of step (1) and sodium chlorite haptoreaction at 450 DEG C of temperature, make the oxidation of nitric oxide in flue gas be nitrogen dioxide;
(3) denitration process: through the flue gas of step (2) pre-oxidation treatment and desulfurizing byproduct haptoreaction, the nitrogen dioxide in flue gas will be absorbed; Wherein, sodium sulfite is contained in desulfurizing byproduct.
Embodiment 2
The smoke eliminator of the present embodiment is with embodiment 1, and the method for gas cleaning in the present embodiment is:
(1) flue gas pre-desulfurization process: adopt desulfurizing agent to carry out pre-desulfurization process to flue gas, make the concentration of sulfur dioxide in flue gas be down to 300mg/Nm
3below;
(2) pre-oxidation treatment: will, through the flue gas of the pre-desulfurization process of step (1) and clorox haptoreaction at 800 DEG C of temperature, make the oxidation of nitric oxide in flue gas be nitrogen dioxide;
(3) denitration process: through the flue gas of step (2) pre-oxidation treatment and desulfurizing byproduct haptoreaction, the nitrogen dioxide in flue gas will be absorbed; Wherein, sodium sulfite is contained in desulfurizing byproduct.
Embodiment 3
The smoke eliminator of the present embodiment is with embodiment 1, and the method for gas cleaning in the present embodiment is:
(1) flue gas pre-desulfurization process: adopt desulfurizing agent to carry out pre-desulfurization process to flue gas, make the concentration of sulfur dioxide in flue gas be down to 300mg/Nm
3below;
(2) pre-oxidation treatment: will, through the flue gas of the pre-desulfurization process of step (1) and clorox haptoreaction at 650 DEG C of temperature, make the oxidation of nitric oxide in flue gas be nitrogen dioxide;
(3) denitration process: through the flue gas of step (2) pre-oxidation treatment and desulfurizing byproduct haptoreaction, the nitrogen dioxide in flue gas will be absorbed; Wherein, sodium sulfite is contained in desulfurizing byproduct.
Embodiment 4
The smoke eliminator of the present embodiment is with embodiment 1, and the method for gas cleaning in the present embodiment is:
(1) flue gas pre-desulfurization process: adopt desulfurizing agent to carry out pre-desulfurization process to flue gas, make the concentration of sulfur dioxide in flue gas be down to 300mg/Nm
3below;
(2) pre-oxidation treatment: will, through the flue gas of the pre-desulfurization process of step (1) and clorox haptoreaction at 450 DEG C of temperature, make the oxidation of nitric oxide in flue gas be nitrogen dioxide;
(3) denitration process: through the flue gas of step (2) pre-oxidation treatment and desulfurizing byproduct haptoreaction, the nitrogen dioxide in flue gas will be absorbed; Wherein, sodium sulfite is contained in desulfurizing byproduct.
Finally to should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model but not restriction to the utility model protection domain; although be explained in detail the utility model with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical solution of the utility model or equivalent replacement, and not depart from essence and the scope of technical solutions of the utility model.
Claims (7)
1. a smoke eliminator, it is characterized in that: comprise denitrating tower and the oxidant storage tank being located at described denitrating tower outside, the bottom of described denitrating tower is provided with tower reactor, in described denitrating tower, the top that is positioned at described tower reactor is provided with spraying layer A for spraying oxidant, from the bottom to top successively for spraying spraying layer B and the demist layer of desulfurizing byproduct, gas approach is provided with between described tower reactor and described spraying layer A, described gas approach is positioned on the tower wall of described denitrating tower, and the top of described denitrating tower is provided with exhanst gas outlet;
Described spraying layer A is communicated with described oxidant storage tank by pipeline; Described spraying layer B is communicated with described tower reactor by external circulating pump.
2. smoke eliminator as claimed in claim 1, is characterized in that: described pipeline is provided with oxidation pump.
3. smoke eliminator as claimed in claim 1, is characterized in that: described pipeline is provided with measuring pump and flowmeter.
4. smoke eliminator as claimed in claim 1, is characterized in that: described spraying layer A and described spraying layer B includes shower and is located at the nozzle on described shower.
5. smoke eliminator as claimed in claim 4, is characterized in that: described nozzle is streamlined.
6. smoke eliminator as claimed in claim 1, is characterized in that: described spraying layer A and described spraying layer B is 2 ~ 6 layers.
7. smoke eliminator as claimed in claim 1, is characterized in that: the tower body of described denitrating tower is cylindrical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520780293.XU CN205095626U (en) | 2015-10-09 | 2015-10-09 | Flue gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520780293.XU CN205095626U (en) | 2015-10-09 | 2015-10-09 | Flue gas purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205095626U true CN205095626U (en) | 2016-03-23 |
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ID=55511438
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520780293.XU Active CN205095626U (en) | 2015-10-09 | 2015-10-09 | Flue gas purification device |
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| CN (1) | CN205095626U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195000A (en) * | 2015-10-09 | 2015-12-30 | 广州研华环境科技有限公司 | Flue gas cleaning device and method |
-
2015
- 2015-10-09 CN CN201520780293.XU patent/CN205095626U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105195000A (en) * | 2015-10-09 | 2015-12-30 | 广州研华环境科技有限公司 | Flue gas cleaning device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |