CN205109379U - Sulfur trioxide's desorption system in coal fired power plant flue gas - Google Patents
Sulfur trioxide's desorption system in coal fired power plant flue gas Download PDFInfo
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- CN205109379U CN205109379U CN201520917345.3U CN201520917345U CN205109379U CN 205109379 U CN205109379 U CN 205109379U CN 201520917345 U CN201520917345 U CN 201520917345U CN 205109379 U CN205109379 U CN 205109379U
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- absorbent
- flue gas
- sulfur trioxide
- injection apparatus
- demineralized water
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Abstract
The utility model discloses a sulfur trioxide's desorption system in coal fired power plant flue gas, including the absorbent bin that is used for the preparation with store the absorbent, be used for storing the demineralized water the demineralized water bin, be used for with absorbent bin and demineralized water bin intercommunication preparing the absorbent solution dissolve the case, with dissolve the case intercommunication be used for to the flue in the atomizing spray the injection apparatus of absorbent solution, absorbent bin and demineralized water bin respectively through conveying line I with dissolve case entrance point intercommunication, it passes through conveying line II and injection apparatus intercommunication to dissolve the case exit end, injection apparatus is connected with the compressed air feeding mechanism through conveying line III. The utility model discloses the absorbent quantity can be effectively reduced, the running cost is reduced to the at utmost reduces sulfur trioxide's in the flue gas concentration, realize reduce that coal fired power plant SO2, NOx and particulate matter (PM) discharge with not producing new atmosphere pollution and equipment problem often.
Description
Technical field
The utility model relate to atmosphere pollution administer field, particularly in a kind of coal-fired plant flue gas sulfur trioxide remove system.
Background technology
At present, China's thermoelectricity installed capacity reaches 900,000,000 kilowatts, accounts for more than 60% of national generate output, and thermoelectricity remains the generating main force of China.Thermal power plant coal can produce NO in combustion
x, SO
2, SO
3deng pollutant, along with the increasingly stringent of national environmental standard, the pollutant that the concentration of emission in coal-fired plant flue gas is large, as NO
x, SO
2, flue dust etc. obtained effective control, but pollutants that in flue gas, some exist on a small quantity are as SO
3deng but being removed efficiently.
SO
3toxicity be about SO
210 times, be very easily combined with water and form H
2sO
4acid mist, this acid mist in an atmosphere diffusion can bring serious destruction to the respiratory tract of people, and also can form acid rain, damage capability is very big simultaneously.Because of SO in flue gas
3existence, can improve on the one hand the acid dew point of flue gas, condense in walling of flue and causing boiler flue corrosion, need improve boiler emission temperature for avoiding sour gas, cause boiler exhaust gas loss to increase, boiler efficiency declines; On the other hand, when flue gas is by wet-type absorption tower, flue-gas temperature reduces rapidly, SO in flue gas
3be combined with water and form H
2sO
4mist droplet, and absorption tower is to H
2sO
4droplet to remove ability low, phenomenon that chimney breast often occurs " Lan Yu ".
Along with popularizing of coal-burning power plant's SCR denitration system, under the effect of denitrating catalyst, about there is the SO of 0.4% ~ 1.6%
2be converted into SO
3, add SO in flue gas
3concentration.SO
3with steam, NH
3reaction generates NH
4hSO
4and H
2sO
4be deposited on hydrogen-catalyst reactor and the air preheater surfaces of SCR denitration system, cause catalyst failure and air preheater blocking, thus make coal unit occur that underload compels series of problems such as moving back, air preheater burn into catalyst life is short after installation SCR denitration device, have a strong impact on coal-burning power plant's denitration efficiency and unit normally runs.
The patent No. be 201310044506.8 Chinese patent disclose one and utilize trona effectively to remove flue gas SO
3device and technique, but needed for this device, absorbent consumption is high, to SO
3removal efficiency only have 87%, cost is higher, and extrusion rate is lower, and removal effect is poor.
Therefore, being badly in need of exploitation one can effectively reduce absorbent consumption, reduces operating cost, at utmost to reduce the concentration of sulfur trioxide in flue gas, realizes at minimizing coal-burning power plant SO
2, NO
xwhat do not produce sulfur trioxide in the coal-fired plant flue gas of new atmosphere pollution and plant issue while discharging with particle (PM) removes system.
Summary of the invention
In view of this, what the purpose of this utility model was to provide sulfur trioxide in a kind of coal-fired plant flue gas removes system, can effectively reduce absorbent consumption, reduce operating cost, at utmost to reduce the concentration of sulfur trioxide in flue gas, realize at minimizing coal-burning power plant SO
2, NO
xnew atmosphere pollution and plant issue is not produced while discharging with particle (PM).
In coal-fired plant flue gas of the present utility model, sulfur trioxide removes system, comprise for the preparation of the absorbent storage bin with storage absorbent, for storing the demineralized water storage bin of demineralized water, the dissolving case for preparing absorbent solution is communicated with demineralized water storage bin with absorbent storage bin, the injection apparatus be used for the atomization injection absorbent solution of flue is communicated with dissolving case, described absorbent storage bin is communicated with dissolving case entrance point respectively by transfer pipeline I with demineralized water storage bin, the described dissolving case port of export is communicated with injection apparatus by transfer pipeline II, described injection apparatus is connected with compressed air supply system by transfer pipeline III.
Further, be provided with heating and heat-insulating device in described dissolving case, the operating temperature of this heating and heat-insulating device is 30 DEG C ~ 50 DEG C.
Further, the eject position of described injection apparatus is SCR denitration system gas approach or SCR denitration system exhaust pass or air preheater exhaust pass or wet desulphurization absorption tower gas approach.
Further, described injection apparatus is the blender for carrying out atomized spray to absorbent solution, described blender entrance point is provided with atomizer, described atomizer entrance point is communicated with compressed air supply system with dissolving case with transfer pipeline III respectively by transfer pipeline II, and mixer outlet end is connected with injection grid by transfer pipeline IV.
Further, described injection apparatus is spray gun, and described spray gun entrance point is communicated with compressed air supply system with dissolving case with transfer pipeline III respectively by transfer pipeline II, and lance outlet end is provided with pressure atomized fog jet.
Further, described spray gun is connected with the cooling-air protective device for preventing absorbent solution from solidifying before not spraying.
The beneficial effects of the utility model: in coal-fired plant flue gas of the present utility model, sulfur trioxide removes system, by arranging absorbent storage bin, demineralized water storage bin, dissolve case, injection apparatus and compressed air supply system, demineralized water in absorbent in absorbent storage bin and demineralized water storage bin is passed in dissolving case carry out being mixed to form absorbent solution, under the effect of compressed air supply system, absorbent solution is made to enter in injection apparatus, by injection apparatus to the atomization injection of flue, to be contacted with sulfur trioxide by absorbent solution and chemical reaction occurs, thus realize removing sulfur trioxide in flue gas.The utility model adopts atomized spray absorbent solution to remove sulfur trioxide in flue gas, can effectively reduce absorbent consumption, reduce operating cost, at utmost to reduce the concentration of sulfur trioxide in flue gas, the removal efficiency testing sulfur trioxide through applicant can reach 90% ~ 99%, realizes at minimizing coal-burning power plant SO
2, NO
xnew atmosphere pollution and plant issue is not produced while discharging with particle (PM).
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the first embodiment of the utility model injection apparatus;
Fig. 3 is the second embodiment of the utility model injection apparatus;
Fig. 4 is the third embodiment of the utility model injection apparatus.
Detailed description of the invention
Embodiment one
Fig. 1 is structural representation of the present utility model, Fig. 2 is the first embodiment of the utility model injection apparatus, as shown in the figure: in the coal-fired plant flue gas of the present embodiment, sulfur trioxide removes system, comprise for the preparation of the absorbent storage bin 1 with storage absorbent, for storing the demineralized water storage bin 2 of demineralized water, the dissolving case 3 for preparing absorbent solution is communicated with demineralized water storage bin 2 with absorbent storage bin 1, the injection apparatus 4 be used for the atomization injection absorbent solution of flue 5 is communicated with dissolving case 3, described absorbent storage bin 1 is communicated with dissolving case 3 entrance point respectively by transfer pipeline I6 with demineralized water storage bin 2, described dissolving case 3 port of export is communicated with injection apparatus 4 by transfer pipeline II7, described injection apparatus 4 is connected with compressed air supply system 9 by transfer pipeline III8, compressed air supply system 9 is air pressure pump, for carrying out pressurized delivered to absorbent solution, by arranging absorbent storage bin 1, demineralized water storage bin 2, dissolve case 3, injection apparatus 4 and compressed air supply system 9, demineralized water in absorbent in absorbent storage bin 1 and demineralized water storage bin 2 is passed in dissolving case 3 carry out being mixed to form absorbent solution, under the effect of compressed air supply system, absorbent solution is made to enter in injection apparatus 4, by injection apparatus 4 to the atomization injection of flue 5, to be contacted with sulfur trioxide by absorbent solution and chemical reaction occurs, thus realize removing sulfur trioxide in flue gas.The absorbent of the present embodiment can adopt sodium carbonate or sodium hydrogensulfite or sodium acid carbonate or calcium oxide particle.
In the present embodiment, heating and heat-insulating device (not shown) is provided with in described dissolving case 3, the operating temperature of this heating and heat-insulating device is 30 DEG C ~ 50 DEG C, for controlling the temperature of dissolving case 3 inner absorbent solution, absorbent solution temperature is made to remain at 30 DEG C ~ 50 DEG C, to ensure the amount of solute in absorbent solution, prevent Yin Wendu from reducing and causing the problems such as crystallization.
In the present embodiment, the eject position of described injection apparatus 4 is SCR denitration system gas approach or SCR denitration system exhaust pass or air preheater exhaust pass or wet desulphurization absorption tower gas approach, and applicability is strong.
In the present embodiment, described injection apparatus 4 is the blender 41 for carrying out atomized spray to absorbent solution, described blender 41 entrance point is provided with atomizer 411, described atomizer 411 entrance point is communicated with compressed air supply system 9 with dissolving case 3 with transfer pipeline III8 respectively by transfer pipeline II7, blender 41 port of export is connected with by transfer pipeline IV10 and sprays grid 412, the absorbent solution that dissolving case 3 is passed into first enters in blender 41 again after atomizer 411 is atomized, absorbent solution after blender 41 is atomization is sprayed in flue 5 by spraying grid 412 under the effect of compressed air supply system 9, the absorbent solution of atomized spray contacts with sulfur trioxide and chemical reaction occurs, to realize removing sulfur trioxide in flue gas.
Embodiment two
Fig. 3 is the second embodiment of the utility model injection apparatus, in the present embodiment, described injection apparatus 4 is spray gun 42, described spray gun 42 entrance point is communicated with compressed air supply system 9 with dissolving case 3 with transfer pipeline III8 respectively by transfer pipeline II7, spray gun 42 port of export is provided with pressure atomized fog jet 421, the compressed air that absorbent solution in dissolving case 3 and compressed air supply system 9 are provided enters in spray gun 42 simultaneously, enter absorbent solution in spray gun 42 under the effect of compressed air supply system 9 by pressure atomized fog jet 421 to the atomization injection of flue 5, the absorbent solution of atomized spray contacts with sulfur trioxide and chemical reaction occurs, to realize removing sulfur trioxide in flue gas.The other technologies feature of the present embodiment is identical with embodiment one, does not repeat them here.
Embodiment three
Fig. 4 is the third embodiment of the utility model injection apparatus, in the present embodiment, described spray gun 42 is connected with the cooling-air protective device 11 for preventing absorbent solution from solidifying before not spraying, when the eject position of spray gun 42 is SCR denitration system gas approach, cooling-air protective device 11 need be set, cooling-air protective device 11 is for providing cooling-air to spray gun 42, cooling-air is passed into spray gun 42 by cooling-air protective device 11, front solidification is not being sprayed to prevent absorbent solution, ensure atomised jet effect, the cooling-air protective device 11 of the present embodiment is communicated with spray gun 42 by transfer pipeline V12.The other technologies feature of the present embodiment is identical with embodiment two, does not repeat them here.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described 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 departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (6)
1. in a coal-fired plant flue gas sulfur trioxide remove system, it is characterized in that: comprise for the preparation of the absorbent storage bin with storage absorbent, for storing the demineralized water storage bin of demineralized water, the dissolving case for preparing absorbent solution is communicated with demineralized water storage bin with absorbent storage bin, the injection apparatus be used for the atomization injection absorbent solution of flue is communicated with dissolving case, described absorbent storage bin is communicated with dissolving case entrance point respectively by transfer pipeline I with demineralized water storage bin, the described dissolving case port of export is communicated with injection apparatus by transfer pipeline II, described injection apparatus is connected with compressed air supply system by transfer pipeline III.
2. in coal-fired plant flue gas according to claim 1 sulfur trioxide remove system, it is characterized in that: be provided with heating and heat-insulating device in described dissolving case, the operating temperature of this heating and heat-insulating device is 30 DEG C ~ 50 DEG C.
3. in coal-fired plant flue gas according to claim 1 sulfur trioxide remove system, it is characterized in that: the eject position of described injection apparatus is SCR denitration system gas approach or SCR denitration system exhaust pass or air preheater exhaust pass or wet desulphurization absorption tower gas approach.
4. in coal-fired plant flue gas according to claim 3 sulfur trioxide remove system, it is characterized in that: described injection apparatus is the blender for carrying out atomized spray to absorbent solution, described blender entrance point is provided with atomizer, described atomizer entrance point is communicated with compressed air supply system with dissolving case with transfer pipeline III respectively by transfer pipeline II, and mixer outlet end is connected with injection grid by transfer pipeline IV.
5. in coal-fired plant flue gas according to claim 3 sulfur trioxide remove system, it is characterized in that: described injection apparatus is spray gun, described spray gun entrance point is communicated with compressed air supply system with dissolving case with transfer pipeline III respectively by transfer pipeline II, and lance outlet end is provided with pressure atomized fog jet.
6. in coal-fired plant flue gas according to claim 5 sulfur trioxide remove system, it is characterized in that: described spray gun is connected with the cooling-air protective device for preventing absorbent solution from solidifying before not spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520917345.3U CN205109379U (en) | 2015-11-17 | 2015-11-17 | Sulfur trioxide's desorption system in coal fired power plant flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520917345.3U CN205109379U (en) | 2015-11-17 | 2015-11-17 | Sulfur trioxide's desorption system in coal fired power plant flue gas |
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| CN205109379U true CN205109379U (en) | 2016-03-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090967A (en) * | 2016-05-30 | 2016-11-09 | 杨天宇 | A kind of boiler energy-saving environment protection method and device |
| CN106179739A (en) * | 2016-08-02 | 2016-12-07 | 中国华电科工集团有限公司 | Dust arrester and flue gas ash removal method |
| CN106861375A (en) * | 2017-04-25 | 2017-06-20 | 广州冉升环保工程有限公司 | The device and method that a kind of sulfur trioxide in flue gas is administered |
| CN111318142A (en) * | 2020-02-20 | 2020-06-23 | 中国神华能源股份有限公司国华电力分公司 | Sulfur trioxide removing device for coal combustion system |
| CN113813779A (en) * | 2021-09-03 | 2021-12-21 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Sulfur trioxide removal equipment and method for flue gas purification facility comprising SCR denitration system |
-
2015
- 2015-11-17 CN CN201520917345.3U patent/CN205109379U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090967A (en) * | 2016-05-30 | 2016-11-09 | 杨天宇 | A kind of boiler energy-saving environment protection method and device |
| CN106179739A (en) * | 2016-08-02 | 2016-12-07 | 中国华电科工集团有限公司 | Dust arrester and flue gas ash removal method |
| CN106861375A (en) * | 2017-04-25 | 2017-06-20 | 广州冉升环保工程有限公司 | The device and method that a kind of sulfur trioxide in flue gas is administered |
| CN111318142A (en) * | 2020-02-20 | 2020-06-23 | 中国神华能源股份有限公司国华电力分公司 | Sulfur trioxide removing device for coal combustion system |
| CN113813779A (en) * | 2021-09-03 | 2021-12-21 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Sulfur trioxide removal equipment and method for flue gas purification facility comprising SCR denitration system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |