CN211411447U - Electrostatic dust collection and cloth bag dust collection coupling operation system - Google Patents
Electrostatic dust collection and cloth bag dust collection coupling operation system Download PDFInfo
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- CN211411447U CN211411447U CN201921033879.4U CN201921033879U CN211411447U CN 211411447 U CN211411447 U CN 211411447U CN 201921033879 U CN201921033879 U CN 201921033879U CN 211411447 U CN211411447 U CN 211411447U
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- dust collector
- boiler
- electrostatic
- tail gas
- dust collection
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- 239000000428 dust Substances 0.000 title claims abstract description 129
- 239000004744 fabric Substances 0.000 title abstract description 8
- 230000008878 coupling Effects 0.000 title abstract description 6
- 238000010168 coupling process Methods 0.000 title abstract description 6
- 238000005859 coupling reaction Methods 0.000 title abstract description 6
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 48
- 239000007789 gas Substances 0.000 claims abstract description 40
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000292 calcium oxide Substances 0.000 claims abstract description 29
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002912 waste gas Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000012717 electrostatic precipitator Substances 0.000 claims description 18
- 238000006477 desulfuration reaction Methods 0.000 claims description 14
- 230000023556 desulfurization Effects 0.000 claims description 14
- 230000005684 electric field Effects 0.000 claims description 11
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 9
- 239000000920 calcium hydroxide Substances 0.000 claims description 9
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 13
- 239000003546 flue gas Substances 0.000 description 13
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
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Abstract
The utility model discloses an electrostatic dust collection and cloth bag dust collection coupled operation system, which comprises an electrostatic dust collector (2), a desulfurizing tower (4) and a cloth bag dust collector (5); the electrostatic dust collector (2) is connected with the boiler (10) and is used for receiving boiler waste gas containing calcium oxide and carrying out primary dust collection on the boiler waste gas to obtain first tail gas, and the dust collection capacity of the electrostatic dust collector (2) is smaller than the waste gas output of the boiler (10) and is used for enabling the first tail gas to contain a part of calcium oxide which is not removed; the desulfurizing tower (4) is connected with the electrostatic dust collector (2), calcium oxide is separated from the first tail gas, and the separated calcium oxide is used as a desulfurizing agent to desulfurize the first tail gas to obtain second tail gas; the bag-type dust collector (5) is connected with the desulfurizing tower (4) and is used for carrying out secondary dust collection on the second tail gas to obtain discharged tail gas, and coupling operation between the electrostatic dust collector and the bag-type dust collector is realized, so that an energy-saving and economic operation mode is achieved.
Description
Technical Field
The utility model relates to an energy-conserving and environmental protection technology field especially relates to an electrostatic precipitator and sack dust removal coupling operating system.
Background
The primary energy of China is coal as the main energy, pulverized coal is combusted in a fluidized state in a hearth of a boiler, most of combustible substances are combusted in the boiler, high-temperature flue gas containing sulfur-containing gas such as sulfur dioxide is generated, part of non-combustible substances form fly ash after being cooled at the tail of the boiler, and the fly ash is main solid waste discharged by a coal-fired boiler system and also exists in the high-temperature flue gas after combustion. The average content of calcium oxide in the fly ash which is the product of pulverized coal combustion of an industrial boiler system is 16-25%.
Because sulfur dioxide and other sulfur-containing gases can cause serious harm to the aspects of natural ecological environment, human health, industrial and agricultural production, buildings, materials and the like, high-temperature flue gas containing sulfur dioxide and other sulfur-containing gases has to be subjected to desulfurization treatment and can be discharged only when meeting the national emission standard due to the national requirements on energy conservation and emission reduction.
The dust removing equipment matched with the combustion power plant boiler in China mainly comprises an electrostatic dust remover, and is generally 2-4 electric fields. Up to now, the boiler capacity of the electric power industry using electrostatic precipitators accounts for more than 95% of the total capacity.
The dust removal efficiency of the electrostatic dust collector is influenced by various factors such as the design level, the operation condition of the boiler and the like. Due to the fact that coal types of coal-fired power plants in China are variable and operation maintenance and the like are added, most of active electrostatic dust collectors are difficult to achieve design efficiency. According to the new thermal power plant pollutant emission standard (GB13223-2011), the dust content is less than or equal to 30mg/m 3; sulfur dioxide is less than or equal to 200mg/m 3; nitrogen oxides is less than or equal to 200mg/m3), at present, the following three transformation schemes are generally adopted: firstly, an electric field of the electrostatic dust collector is increased to increase the dust collecting area of the dust collector, so that the dust collecting efficiency is improved. However, the method is limited by the dust removal principle of the electrostatic dust collector, so that the dust removal efficiency is difficult to break through, and the increase of the number of electric fields is limited by the original space planning of the power plant; secondly, the bag-type dust collector is modified, the modified parts are too many, and the operation is carried out on the basis of not changing the civil engineering part and the concrete frame of the original electrostatic dust collector, part of components of the original electrostatic dust collector are removed, and then the construction of a gas purifying chamber and the modification of a smoke box flue are carried out according to the requirements, so that the investment is too large; and thirdly, the electrostatic cloth bag composite dust collector is transformed, the operation condition is stable, the desulfurization and dust removal effects are good, but the daily use cost is high, namely, in order to improve the electrostatic dust removal capability, the dust removal capability of the electrostatic dust collector is inevitably increased, but the dust removal capability of the electrostatic dust collector is inevitably increased, too much electric energy is inevitably consumed, and the dust removal cost is increased. In addition, when the desulfurization is carried out in the desulfurizing tower, a desulfurizing agent needs to be continuously added, and the dedusting cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a, can reduce the electrostatic precipitator and the sack coupling operation system that removes dust of dust cost.
The utility model provides an electrostatic dust collection and cloth bag dust collection coupled operation system, which comprises an electrostatic dust collector 2, a desulfurizing tower 4 and a cloth bag dust collector 5;
the electrostatic dust collector 2 is connected with the boiler 10 and is used for receiving boiler waste gas containing calcium oxide and carrying out primary dust collection on the boiler waste gas to obtain first tail gas, and the dust collection capacity of the electrostatic dust collector 2 is set to be smaller than the output of the boiler waste gas, so that the first tail gas contains a part of calcium oxide which is not removed;
the desulfurizing tower 4 is connected with the electrostatic dust collector 2, calcium oxide is separated from the first tail gas, and the separated calcium oxide is used as a desulfurizing agent to desulfurize the first tail gas to obtain a second tail gas;
and the bag-type dust collector 5 is connected with the desulfurizing tower 4 and is used for carrying out secondary dust removal on the second tail gas to obtain discharged tail gas.
Further, still include desulfurization draught fan 6, desulfurization draught fan 6 is established on the flue between sack cleaner 5 and chimney 7 for overcome the pressure loss that the flue brought, the boiler waste gas that makes boiler 10 produce, process outwards discharge behind electrostatic precipitator 2, desulfurizing tower 4, the sack cleaner 5.
Further, still include boiler induced draft fan 3, boiler induced draft fan sets up in the branch flue 1b with electrostatic precipitator 2 exit linkage.
Furthermore, there are a plurality of boilers 10, each boiler 10 is provided with the electrostatic precipitator 2, each electrostatic precipitator 2 is connected to the main flue 1a through the branch flue 1b, and the main flue 1a is connected to the desulfurizing tower 4.
Further, the electrostatic precipitator 2 has a plurality of electric fields, each of which may be activated simultaneously or individually.
Further, the desulfurizing tower 4 also contains a desulfurizing agent other than the calcium oxide.
Further, the desulfurizer is calcium hydroxide carbide slag.
The utility model has the advantages that: when the electrostatic precipitator is used for carrying out electrostatic precipitation (primary dust removal) on the waste gas generated by boiler combustion, the dust removal capacity of the electrostatic precipitator is set to be smaller than the output of the boiler waste gas, so that the first tail gas contains a part of unremoved calcium oxide, namely, the calcium oxide serving as a desulfurizing agent reacts with the process water in the desulfurizing tower to generate calcium hydroxide which reacts with the sulfur component in the waste gas, and the desulfurization is carried out. Because the dust removal capacity of the electrostatic dust collector can be set to be smaller, the energy consumption is reduced, the consumption of the desulfurizer is saved, and the cost is saved.
Drawings
FIG. 1 is a drawing of the utility model;
fig. 2 is a schematic structural diagram of an electrostatic dust collection and bag-type dust collection coupled operation system.
Description of the reference symbols
2, electrostatic dust collector
4, desulfurizing tower
5, bag-type dust collector
10, boiler
1a, main flue
1b, branch flue
3, boiler induced draft fan
6, desulfurization draught fan
7, chimney
Detailed Description
The present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific examples described in the following embodiments of the present invention are merely illustrative of specific embodiments of the present invention and do not constitute limitations on the scope of the invention.
Industrial background of the examples: for a better understanding of the examples and embodiments of the present invention, the industrial context in which they are used is described. The embodiment is applied to a thermal power plant, on one hand, the pollutant emission of the thermal power plant needs to meet the thermal power plant pollutant emission standard (GB13223-2011) that dust is less than or equal to 30mg/m 3; sulfur dioxide is less than or equal to 200mg/m 3; the nitrogen oxide is less than or equal to 200mg/m 3.
The present invention will be described with reference to the accompanying drawings and specific embodiments.
Fig. 2 is a schematic structural diagram of an electrostatic dust collection and bag-type dust collection coupled operation system as a specific embodiment.
The electrostatic dust collection and cloth bag dust collection coupled operation system comprises: the device comprises a boiler 10, a branch flue 1a, a main flue 1b, an electrostatic dust collector 2, a boiler induced draft fan 3, a desulfurizing tower 4, a bag-type dust collector 5, a desulfurizing induced draft fan 6 and a chimney 7;
the electrostatic dust collector 2 is connected with the boiler 10 and is used for receiving boiler waste gas containing calcium oxide and carrying out primary dust collection on the boiler waste gas to obtain first tail gas, and the dust collection capacity of the electrostatic dust collector 2 is set to be smaller than the output of the boiler waste gas, so that the first tail gas contains a part of calcium oxide which is not removed;
the desulfurizing tower 4 is connected with the electrostatic dust collector 2, calcium oxide is separated from the first tail gas, and the separated calcium oxide is used as a desulfurizing agent to desulfurize the first tail gas to obtain a second tail gas;
and the bag-type dust collector 5 is connected with the desulfurizing tower 4 and is used for carrying out secondary dust removal on the second tail gas to obtain discharged tail gas.
Further, still include desulfurization draught fan 6, desulfurization draught fan 6 is established on the flue between sack cleaner 5 and chimney 7 for overcome the pressure loss that the flue brought, the boiler waste gas that makes boiler 10 produce, process outwards discharge behind electrostatic precipitator 2, desulfurizing tower 4, the sack cleaner 5.
Further, still include boiler induced draft fan 3, boiler induced draft fan sets up in the branch flue 1b with electrostatic precipitator 2 exit linkage.
Furthermore, there are a plurality of boilers 10, each boiler 10 is provided with the electrostatic precipitator 2, each electrostatic precipitator 2 is connected to the main flue 1a through the branch flue 1b, and the main flue 1a is connected to the desulfurizing tower 4.
Further, the electrostatic precipitator 2 has a plurality of electric fields, each of which may be activated simultaneously or individually.
Further, the desulfurizing tower 4 also contains a desulfurizing agent other than the calcium oxide.
Further, the desulfurizer is calcium hydroxide carbide slag.
In this embodiment, the electrostatic precipitator is a dual chamber 4 electric field, and the 4 electric fields can be activated simultaneously or individually.
High-temperature flue gas discharged by the boiler 10 flows into an air inlet of the electrostatic dust collector 2 through the branch flue 1a under the drive of the boiler induced draft fan 3, the electrostatic dust collector 2 ionizes the flue gas by utilizing a high-voltage electric field, the charged dust in the air flow is separated from the air flow under the action of the electric field, and the charged dust falls into an ash bucket. Compared with other dust removal equipment, the electrostatic dust remover has the advantages of low energy consumption and high dust removal efficiency, is suitable for removing dust of 0.01-50 mu m in flue gas, and can be used in occasions with high flue gas temperature and high pressure. Because the dust removing capacity of the electrostatic dust remover 2 is set to be smaller than the output of the boiler exhaust gas and the capture capacity of the electrostatic dust remover to ultrafine particles is limited, the boiler exhaust gas is subjected to primary dust removal under the action of the first electric field to obtain a first exhaust gas, and about 80% of smoke dust is removed, wherein the first exhaust gas contains a part of unremoved calcium oxide;
when the high-temperature flue gas is discharged from the electrostatic dust collector 2, other small particles are remitted into the air flow again, and the air flow enters the desulfurizing tower 4 through the main flue 1b by the boiler induced draft fan 3.
The desulfurizing tower 4 is connected with the electrostatic dust collector 2, calcium oxide is separated from the first tail gas, sulfur-containing high-temperature flue gas and a desulfurizing agent enter from the bottom to move upwards in the desulfurizing tower 4, and are fully and uniformly mixed in the moving process, in the embodiment, a spraying device for providing process water is arranged in the desulfurizing tower 4, and the calcium oxide separated from the residual about 20 percent of the first tail gas discharged from the electrostatic dust collector 2 reacts with the process water in the desulfurizing tower to generate calcium hydroxide; meanwhile, the desulfurizing tower 4 also contains a desulfurizing agent other than the calcium oxide. In this example, calcium hydroxide or carbide slag (calcium hydroxide content is 50%) produced by this company is used as the desulfurizing agent in the desulfurizing tower to chemically absorb sulfur dioxide and nitrogen oxide in the flue gas.
The calcium hydroxide generated by the reaction of the calcium oxide in the flue gas and the process water is used for replacing the desulfurizer, so that the input amount of the desulfurizer can be saved, the cost of the desulfurizer can be reduced, and the energy conservation and consumption reduction of the whole system can be realized.
The bag-type dust collector 5 is used for secondary dust collection of the desulfurized high-temperature flue gas. The bag-type dust remover 5 is generally used for dynamically removing dust by low-pressure pulses, is suitable for the conditions of flue gas and dust during desulfurization operation, has high efficiency of removing dust of ultrafine dust, and is high in efficiency of removing dust by the bag-type dust remover 5, and the residual dust is filtered by a bag-type dust removing unit, is purified and then is discharged into the atmosphere from a chimney 7 by the driving of a desulfurization induced draft fan 6.
Therefore, when the electrostatic dust collector is used for carrying out primary dust removal on the fly ash generated by boiler combustion in the electrostatic dust collector, the dust removal capacity of the electrostatic dust collector is set to be smaller than the output of the boiler waste gas, so that the first tail gas contains a part of unremoved calcium oxide, a small amount of smoke dust is allowed to enter the desulfurizing tower, and calcium hydroxide generated by the reaction of the calcium oxide in the small amount of smoke dust and process water in the desulfurizing tower is used as a desulfurizing agent in the desulfurizing tower, so that the consumption of the desulfurizing agent is saved, the cost is saved, and the energy is saved and the consumption is reduced; the coupling operation of electrostatic dust collection and bag dust collection is realized, and the effect of the bag dust collector is better exerted.
The above description is specific to the present invention, and other specific implementations related to the claims that are not explicitly described also fall within the scope of the claims.
Claims (7)
1. An electrostatic dust collection and bag-type dust collection coupled operation system is characterized by comprising an electrostatic dust collector (2), a desulfurizing tower (4) and a bag-type dust collector (5);
the electrostatic dust collector (2) is connected with the boiler (10) and is used for receiving boiler waste gas containing calcium oxide and carrying out primary dust collection on the boiler waste gas to obtain first tail gas, and the dust collection capacity of the electrostatic dust collector (2) is smaller than the waste gas output of the boiler (10) and is used for enabling the first tail gas to contain a part of calcium oxide which is not removed;
the desulfurizing tower (4) is connected with the electrostatic dust collector (2), calcium oxide is separated from the first tail gas, and the separated calcium oxide is used as a desulfurizing agent to desulfurize the first tail gas to obtain a second tail gas;
and the bag-type dust collector (5) is connected with the desulfurizing tower (4) and is used for carrying out secondary dust removal on the second tail gas to obtain discharged tail gas.
2. The system of claim 1, wherein: also comprises a desulfurization induced draft fan (6),
and the desulfurization induced draft fan (6) is arranged on a flue between the bag-type dust collector (5) and the chimney (7) and used for overcoming pressure loss caused by the flue and discharging boiler waste gas generated by the boiler (10) outwards after the electrostatic dust collector (2), the desulfurization tower (4) and the bag-type dust collector (5).
3. The system of claim 1, wherein: still include boiler draught fan (3), the boiler draught fan sets up in branch flue (1b) with electrostatic precipitator (2) exit linkage.
4. The system of claim 3, wherein: the number of the boilers (10) is multiple, the electrostatic dust collectors (2) are correspondingly arranged on each boiler (10), each electrostatic dust collector (2) is connected with the main flue (1a) through the branch flue (1b), and the main flue (1a) is connected with the desulfurizing tower (4).
5. The system of claim 1, wherein: the electrostatic precipitator (2) has a plurality of electric fields, each of which may be activated simultaneously or individually.
6. The system of claim 1, wherein: the desulfurizing tower (4) is also provided with a desulfurizing agent except the calcium oxide.
7. The system of claim 6, wherein: the desulfurizer is calcium hydroxide carbide slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921033879.4U CN211411447U (en) | 2019-07-04 | 2019-07-04 | Electrostatic dust collection and cloth bag dust collection coupling operation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921033879.4U CN211411447U (en) | 2019-07-04 | 2019-07-04 | Electrostatic dust collection and cloth bag dust collection coupling operation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211411447U true CN211411447U (en) | 2020-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921033879.4U Active CN211411447U (en) | 2019-07-04 | 2019-07-04 | Electrostatic dust collection and cloth bag dust collection coupling operation system |
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| Country | Link |
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| CN (1) | CN211411447U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114225667A (en) * | 2021-11-26 | 2022-03-25 | 国家能源集团国源电力有限公司 | Desulfurization equipment and method |
-
2019
- 2019-07-04 CN CN201921033879.4U patent/CN211411447U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114225667A (en) * | 2021-11-26 | 2022-03-25 | 国家能源集团国源电力有限公司 | Desulfurization equipment and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Qinghai Salt Lake yuanpin Chemical Co.,Ltd. Assignor: QINGHAI SALT LAKE INDUSTRY Co.,Ltd. Contract record no.: X2023990000998 Denomination of utility model: A Coupled Operation System of Electrostatic Dust Removal and Bag Dust Removal Granted publication date: 20200904 License type: Exclusive License Record date: 20240102 |
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| EE01 | Entry into force of recordation of patent licensing contract |