CN211246051U - Foam collecting and crushing device of wet flue gas desulfurization system of coal-fired power plant - Google Patents
Foam collecting and crushing device of wet flue gas desulfurization system of coal-fired power plant Download PDFInfo
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- CN211246051U CN211246051U CN201920773052.0U CN201920773052U CN211246051U CN 211246051 U CN211246051 U CN 211246051U CN 201920773052 U CN201920773052 U CN 201920773052U CN 211246051 U CN211246051 U CN 211246051U
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- fired power
- flue gas
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- 239000006260 foam Substances 0.000 title claims abstract description 111
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 35
- 230000023556 desulfurization Effects 0.000 title claims abstract description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000003546 flue gas Substances 0.000 title claims abstract description 33
- 238000010521 absorption reaction Methods 0.000 claims abstract description 22
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 7
- 238000011010 flushing procedure Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 11
- 239000010440 gypsum Substances 0.000 abstract description 4
- 229910052602 gypsum Inorganic materials 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000006227 byproduct Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000053 physical method Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 16
- 239000003245 coal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000008258 liquid foam Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a coal-fired power plant wet flue gas desulfurization system's foam collection breaker, including overflow pipe, the broken cover of foam, exhaust cap, level sensor and nozzle, overflow pipe and coal-fired power plant's desulfurization absorption tower UNICOM, the broken cover of foam and the upper end discharge gate UNICOM of overflow pipe, the nozzle sets up on the same high circumference of the inner wall of the broken cover of foam uniformly, radially, the top of the broken cover of foam is located to the exhaust cap, level sensor locates the bottom of the broken cover of foam. Has the advantages that: foam formed by a wet desulphurization system is effectively eliminated, the problem of foam of an absorption tower is solved by a physical method, the quality of slurry is not changed, and the quality of byproduct gypsum is not reduced; the device has simple structure and is convenient to manufacture, install and overhaul.
Description
Technical Field
The invention belongs to the technical field of environmental protection of thermal power plants, and particularly relates to a foam collecting and crushing device of a wet flue gas desulfurization system of a coal-fired power plant.
Background
Coal as primary energy, SO produced in combustion process2Is one of important air pollutants, and a large amount of limestone-gypsum wet flue gas desulfurization facilities are built for the purpose.
The flue gas treated by the wet desulphurization device contains complex substances such as acid insoluble substances, and in the process of fully contacting the flue gas with the slurry, a gas-liquid interface formed by the flue gas and the slurry forms spherical bubbles under the action of huge surface tension; a large number of bubbles rise to the surface of the slurry pool rapidly under the action of the gas-liquid density difference to form a layer of foam.
Statistics shows, the foam is more, the enrichment phenomenon of the material of reinforcing surface tension will be more obvious in the absorption tower, bubble surface tension is just bigger, surface tension increases, it is difficult for breakage to lead to the bubble, and then arouse thick liquid pond surface foam layer bodiness, serious false liquid level appears, be unfavorable for wet flue gas desulfurization device system's operation control, also influenced sulfur dioxide's absorption to a certain extent, be unfavorable for the make full use of lime stone, some power plants are because false liquid level is compelled to adopt low liquid level operation, cause the unable standard reaching of circulating slurry pump output pressure, the nozzle sprays the effect and worsens, desulfurization efficiency reduces, cause environmental protection hidden danger.
The elimination of the foam of the desulfurization slurry is a long-standing problem in a wet desulfurization system, and the existing method adopts a chemical method, namely, a defoaming agent is added into the slurry of an absorption tower, but the quality of the slurry is changed, and the quality of the byproduct gypsum is influenced to a certain extent.
Disclosure of Invention
The invention aims to overcome the problems in the background art and provides a foam collecting and crushing device of a wet flue gas desulfurization system of a coal-fired power plant, when foam of an absorption tower exceeds a certain height in wet desulfurization, the foam is discharged to a pit of the absorption tower through a trench by using a siphonage phenomenon through an overflow pipe and is supplemented to the absorption tower through a pit pump, and the foam collecting and crushing device is specifically realized by the following technical scheme:
coal fired power plant wet flue gas desulfurization system's foam collection breaker includes: overflow pipe, broken cover of foam, exhaust cap, level sensor and nozzle, overflow pipe and coal fired power plant's absorption tower UNICOM, the broken cover of foam and the upper end export UNICOM of overflow pipe, the nozzle sets up on the inner wall of the broken cover of foam uniformly, the top of the broken cover of foam is located to the exhaust cap, the bottom of the broken cover of foam is located to level sensor.
The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant is further designed in that the nozzle is connected with the flushing pipe sequentially through the nozzle connecting pipe and the connecting flange, and the flushing water is deionized water.
The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant is further designed in that an included angle between the axial direction of the nozzle and the radial direction of the foam crushing cover is 10-20 degrees.
The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant is further designed in a way that the overflow pipe is communicated with a vertically arranged discharge pipe through a U-shaped pipe, the inlet position of the U-shaped pipe close to one side of the absorption tower is higher than the outlet of the other side, and the upper end and the lower end of the discharge pipe are respectively corresponding to the upper end discharge port and the lower end discharge port of the overflow pipe.
The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant is further designed in that the number of the nozzles is 3-4, and the coverage rate of the nozzles in the foam crushing cover is 100-200%.
The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant is further designed in that the foam crushing cover is of an inverted frustum structure, and the included angle between the inner wall of the foam crushing cover and the central line of the foam crushing cover is 10-20 degrees.
The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant is further designed in that the foam crushing cover is made of stainless steel DIN 1.4529 or 904L.
The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant is further designed in that prickles used for crushing foam during spraying are arranged on the inner wall of the foam crushing cover, and the length of the prickles is 1-5 cm.
The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant is further designed in that the burs are made of DIN 1.4529 or 904L stainless steel.
The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant is further designed in that the nozzle is a porous nozzle, and the pressure is 1.5-2kg/cm2The nozzle is provided with a plurality of nozzles, and the diameter of each nozzle is 0.5-3 mm.
The invention has the following advantages:
according to the foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant, when rising foam reaches the bottom end of the foam crushing cover, the liquid level sensor automatically senses the foam, and the spraying and flushing device is instantly started, so that the foam is effectively eliminated.
The foam crushing cover adopts a circular truncated cone shape design, so that the storage capacity for collecting foam is effectively increased; the nozzles are tangentially arranged and matched with the design of the camber angle of the foam crushing cover to generate a rotational flow effect during spraying, so that the flow in the downcomer is smoother, and the foam can be punctured by matching with the prickle structure arranged inside, so that the removal effect of the foam is effectively enhanced.
The device has simple structure, and is convenient to manufacture, install and overhaul; effectively eliminates foam formed by wet desulphurization, solves the problem of foam of the absorption tower by a physical method, does not change the quality of slurry, and does not reduce the quality of byproduct gypsum.
Drawings
FIG. 1 is a schematic structural diagram of a foam collecting and crushing device of a wet flue gas desulfurization system of a coal-fired power plant.
Fig. 2 is a schematic view of the nozzle arrangement.
Fig. 3 is an enlarged schematic view at a of the structural schematic view of the nozzle arrangement of fig. 2.
FIG. 4 is a schematic top view of a foam breaker cover.
FIG. 5 is a schematic front view of a foam breaker cover.
Fig. 6 is a schematic diagram of the structure of the bur.
Wherein, 1-overflow pipe; 2-a foam breaking cover; 3-an exhaust cap; 4-a liquid level sensor; 5-a connecting flange; 6-nozzle connecting pipe; 7-nozzle.
Detailed Description
The invention is described in detail below with reference to the drawings and two specific embodiments.
The first embodiment is as follows:
referring to fig. 1, the wet flue gas desulfurization foam collecting and spraying device for a coal-fired power plant provided by the invention comprises an overflow pipe 1, a foam crushing cover 2, an exhaust cap 3, a liquid level sensor 4, a connecting flange 5, a nozzle connecting pipe 6 and a nozzle 7. Overflow pipe 1 and coal fired power plant's absorption tower UNICOM, foam broken cover 2 and overflow pipe 1's upper end export UNICOM, and nozzle 7 sets up uniformly on foam broken cover 2's inner wall, and the top of foam broken cover 2 is located to exhaust cap 3, and foam broken cover 2's bottom is located to level sensor 4.
The nozzle 7 of this embodiment is connected to a flush pipe (not shown) via a nozzle connection pipe 6 and a connection flange 5 in this order.
The axial direction of the nozzle 7 forms an angle of 13 degrees with the radial direction of the foam breaking cover.
The overflow pipe 1 of this embodiment comprises the discharge tube UNICOM of U-shaped pipe and vertical setting. The U-shaped pipe is higher than the outlet of the other side near the inlet of one side of the absorption tower, and the upper end and the lower end of the discharge pipe are respectively corresponding to the upper end discharge port and the lower end discharge port of the overflow pipe.
The number of nozzles was 3, and the coverage of the nozzles in the foam breaker cap was 120%.
The foam crushing cover 2 is of an inverted frustum structure, the top surface is in a phi 600 circular shape, and the bottom surface is in a phi 300 circular shape. The included angle between the inner wall of the foam crushing cover and the central line of the foam crushing cover is 15 degrees.
The foam-breaking cover 2 is made of stainless steel with the material DIN 1.4529.
As shown in figure 6, the inner wall of the foam breaking cover is provided with barbs for breaking foam when spraying, and the length of the main branch of the barbs is 3.5cm, and the length of the small branch is 1 cm. The burs are made of DIN 1.4529 stainless steel.
The nozzle is a porous nozzle with a pressure of 2kg/cm2The nozzle is provided with a plurality of nozzles, and the diameter of each nozzle is 0.5 mm.
The embodiment is applied to a 300MW unit wet desulphurization device of a certain coal-fired power plant, and the specific working parameters are as follows:
example two:
in this embodiment, the wet desulphurization device of a 600MW unit of a certain coal-fired power plant is applied, and the specific working parameters are as follows (the setting modes of the other parts and devices are the same as those in embodiment 1):
the number of nozzles in this example was 4, and the coverage of the nozzles in the foam breaker cap was 200%.
The foam crushing cover is of an inverted frustum structure, the top surface of the foam crushing cover is in a phi 800 circular shape, and the bottom surface of the foam crushing cover is in a phi 400 circular shape. The included angle between the inner wall of the foam crushing cover and the central line of the foam crushing cover is 15 degrees.
The foam breaking cover is made of 904L stainless steel.
The inner wall of the foam crushing cover of the embodiment is provided with the prickles for crushing foam during spraying, the length of the main branch of the prickles is 5cm, and the length of the small branch is 1 cm. The adopted material of the burs is 904L stainless steel.
The nozzle is a multi-hole nozzle with a pressure of 2.5kg/cm2The nozzle is provided with a plurality of nozzles, and the diameter of each nozzle is 1.5 mm.
As shown in FIG. 1, when the liquid level in the absorption tower exceeds a predetermined level, the slurry overflows from the direction a through an overflow pipe 1 in the absorption tower. Because the density of absorption tower thick liquid bubble is lower, a large amount of thick liquid foam gets into foam breaker 2 according to the direction of b in the overflow pipe, when the foam reaches foam breaker 2 bottom, level sensor 4 senses the position of foam, the instantaneous start rinse-system, the liquid that comes from rinse-system passes through flange 5, nozzle connecting pipe 6, the tangential blowout is from nozzle 7, form certain vortex in foam breaker 2, utilize the prickle structure in the cracker, eliminate effectively from the foam that rises in overflow pipe 1, the mixed liquid that forms and the liquid of overflow are together according to the direction of c under the action of gravity, get into the trench through overflow pipe 1, owing to the siphonage that the decline liquid produced simultaneously, also inhale the downcomer with partial thick liquid in the absorption tower in the lump, finally join the absorption tower pit.
The two embodiments have the following implementation effects: effectively eliminating foam overflowing from the absorption tower and reducing the using amount of the defoaming agent; the environment of the slurry tank of the absorption tower is optimized, the utilization rate of the absorbent is improved, the use amount of the absorbent is reduced, and meanwhile, the operation of 1 circulating pump can be reduced by running and allocating under the same working condition, so that good economic benefit is generated; the phenomenon of leakage is avoided, and the civilized production environment is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a coal-fired power plant wet flue gas desulfurization system's foam collection breaker, its characterized in that includes overflow pipe, broken cover of foam, exhaust cap, level sensor and nozzle, overflow pipe and coal-fired power plant's absorption tower UNICOM, the broken cover of foam and the upper end discharge gate UNICOM of overflow pipe, the nozzle evenly, along the broken cover of foam radially set up on the inner wall of broken cover of foam, the top of broken cover of foam is located to the exhaust cap, level sensor locates the bottom of broken cover of foam.
2. The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant as recited in claim 1, wherein the nozzle is connected with the flushing pipe sequentially through a nozzle connecting pipe and a connecting flange, and the flushing water is deionized water.
3. The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant as recited in claim 1, wherein an angle between an axial direction of the nozzle and a radial direction of the foam crushing cover is 10 ° to 20 °.
4. The foam collecting and crushing device for the wet flue gas desulfurization system of the coal-fired power plant as recited in claim 1, wherein the overflow pipe is formed by communicating a U-shaped pipe with a vertically arranged discharge pipe, an inlet position of the U-shaped pipe on one side close to the absorption tower is higher than an outlet on the other side, and upper and lower ends of the discharge pipe respectively correspond to an upper end discharge port and a lower end discharge port of the overflow pipe.
5. The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant as recited in claim 1, wherein the number of the nozzles is 3-4, and the coverage rate of the nozzles in the foam crushing hood is 100-200%.
6. The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant as recited in claim 1, wherein the foam crushing hood is of an inverted frustum structure, and an included angle between an inner wall of the foam crushing hood and a center line of the foam crushing hood is 10 ° to 20 °.
7. The foam collecting and crushing device for the wet flue gas desulfurization system of the coal-fired power plant as recited in claim 1, wherein the foam crushing hood is made of DIN 1.4529 stainless steel or 904L stainless steel.
8. The foam collecting and crushing device of the wet flue gas desulfurization system of the coal-fired power plant as recited in claim 1, wherein the inner wall of the foam crushing hood is provided with barbs for crushing foam when spraying, and the barbs have a length of 1-5 cm.
9. The foam collecting and crushing device for the wet flue gas desulfurization system of the coal-fired power plant as recited in claim 8, wherein the adopted material of the barbs is DIN 1.4529 stainless steel or 904L stainless steel.
10. The foam collecting and crushing device for the wet flue gas desulfurization system of the coal-fired power plant as recited in claim 1, wherein the nozzle is a multi-hole nozzle and the pressure is 1.5-2kg/cm2The nozzle is provided with a plurality of nozzles, and the diameter of each nozzle is 0.5-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920773052.0U CN211246051U (en) | 2019-05-27 | 2019-05-27 | Foam collecting and crushing device of wet flue gas desulfurization system of coal-fired power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920773052.0U CN211246051U (en) | 2019-05-27 | 2019-05-27 | Foam collecting and crushing device of wet flue gas desulfurization system of coal-fired power plant |
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| CN211246051U true CN211246051U (en) | 2020-08-14 |
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| CN201920773052.0U Active CN211246051U (en) | 2019-05-27 | 2019-05-27 | Foam collecting and crushing device of wet flue gas desulfurization system of coal-fired power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110075676A (en) * | 2019-05-27 | 2019-08-02 | 国电科学技术研究院有限公司 | A kind of foam collection crushing device of coal fired power plant wet method fume desulfurizing system |
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2019
- 2019-05-27 CN CN201920773052.0U patent/CN211246051U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110075676A (en) * | 2019-05-27 | 2019-08-02 | 国电科学技术研究院有限公司 | A kind of foam collection crushing device of coal fired power plant wet method fume desulfurizing system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee after: National Energy Group Science and Technology Research Institute Co.,Ltd. Patentee after: GUODIAN ENVIRONMENTAL PROTECTION RESEARCH INSTITUTE Co.,Ltd. Address before: 210046 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee before: GUODIAN SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Patentee before: GUODIAN ENVIRONMENTAL PROTECTION RESEARCH INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |