CN214106408U - Lime slurry preparation system of waste incineration plant - Google Patents
Lime slurry preparation system of waste incineration plant Download PDFInfo
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- CN214106408U CN214106408U CN202022554821.3U CN202022554821U CN214106408U CN 214106408 U CN214106408 U CN 214106408U CN 202022554821 U CN202022554821 U CN 202022554821U CN 214106408 U CN214106408 U CN 214106408U
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- lime
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- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 93
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 93
- 239000004571 lime Substances 0.000 title claims abstract description 93
- 239000002002 slurry Substances 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000004056 waste incineration Methods 0.000 title claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 33
- 230000029087 digestion Effects 0.000 claims abstract description 29
- 238000010790 dilution Methods 0.000 claims abstract description 29
- 239000012895 dilution Substances 0.000 claims abstract description 29
- 239000000428 dust Substances 0.000 claims abstract description 11
- 238000007865 diluting Methods 0.000 claims description 16
- 239000008399 tap water Substances 0.000 claims description 12
- 235000020679 tap water Nutrition 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 17
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model provides a lime slurry preparation system of a waste incineration plant, which comprises a digestion device, a dilution device and a lime slurry conveying device; still include venturi dust collector, still set up first lime thick liquid return line, lime thick liquid return line one end with go out the pump line connection and the other end with venturi negative pressure suction washing device's first entry is connected. A steam collecting pipeline is further arranged at the top of the digestion tank, one end of the steam collecting pipeline is connected with the digestion tank, and the other end of the steam collecting pipeline is connected with a second inlet of the venturi negative pressure suction washing device; the outlet of the venturi negative pressure suction washing device is connected to the dilution tank. By adding a lime slurry backflow pipeline, a small part of output slurry of the lime slurry conveying device is conveyed to the atomizer, and the large part of output slurry flows into the Venturi negative pressure suction washing device through the first inlet, in the Venturi tube, wet and hot steam and backflow slurry are mixed and condensed and finally flow back to the dilution tank, and the wet and hot steam is effectively eliminated.
Description
Technical Field
The utility model relates to a lime slurry preparation system of waste incineration plant.
Background
With the rapid development of waste incineration power generation, the design and management of a flue gas treatment system of the waste incineration power generation system are increasingly mature and standard, in the aspect of flue gas deacidification process, a semi-dry deacidification system is generally adopted as a main deacidification process at present, and a dry deacidification system or a wet deacidification system is supplemented as an auxiliary deacidification process according to local emission standards. At present, a mainstream semidry deacidification system adopts a mode of spraying lime slurry by a high-speed rotary atomizer, and in order to ensure the high efficiency of neutralization reaction and take treatment cost into consideration, a lime slurry preparation system needs to be constructed in a matching manner, and the lime slurry is prepared on site by adopting quicklime.
The lime slurry preparation system mainly comprises a lime storage bin, a digestion tank, a dilution tank, a lime slurry conveying pump, a slurry conveying pipeline and the like. According to the lime slurry preparation and adding use process, when the dilution tank sends a low liquid level signal, lime in the lime bin is conveyed to the digestion tank through the lime discharge valve and the screw conveyor, meanwhile, tap water in a certain proportion enters the digestion tank to digest the lime, along with the rise of the liquid level of the digestion tank, the digested lime slurry overflows to the dilution tank through the overflow pipeline of the digestion tank, meanwhile, the tap water inlet valve of the dilution tank is opened to dilute the lime slurry to a proper preset concentration, and when the liquid level of the dilution tank reaches a high liquid level, the lime slurry preparation is stopped. Lime slurry in the dilution tank is conveyed to the atomizer through a lime slurry conveying pump and a lime slurry circulating pipeline for deacidification of flue gas, and the residual lime slurry flows back to the dilution tank. The flow of the lime slurry delivery pump is far greater than the actual lime slurry demand of the atomizer, and the delivery capacity of the lime slurry pump is usually 5-7 times of the actual demand of the atomizer, so that the flow rate of a pipeline is increased, the blockage of the delivery pipeline is avoided, and the residual lime slurry flows back to the dilution tank. Since the digestion process is exothermic, a certain amount of damp and hot steam carrying lime powder is generated in the digestion tank. At present, the part of steam is treated in a centralized spraying and washing mode after being sucked by a centrifugal fan, but the steam is easy to cause scaling and blockage of a spraying and washing system comprising a fan due to the fact that lime powder is carried in the steam, the spraying and washing system is difficult to stably run for a long time, and the system maintenance workload is large.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of unstable operation and large maintenance workload of a digestion tank hot steam washing system when the lime slurry is prepared by a waste incineration plant, the utility model provides a lime slurry preparation system of the waste incineration plant, which comprises a digestion device, a diluting device and a lime slurry conveying device; still include venturi dust collector, still set up first lime thick liquid return line, lime thick liquid return line one end with go out the pump line connection and the other end with venturi negative pressure suction washing device's first entry is connected. A steam collecting pipeline is further arranged at the top of the digestion tank, one end of the steam collecting pipeline is connected with the digestion tank, and the other end of the steam collecting pipeline is connected with a second inlet of the venturi negative pressure suction washing device; the outlet of the venturi negative pressure suction washing device is connected to the dilution tank. By adding a lime slurry backflow pipeline, a small part of output slurry of the lime slurry conveying device is conveyed to the atomizer, and the large part of output slurry flows into the Venturi negative pressure suction washing device through the first inlet, in the Venturi tube, wet and hot steam and backflow slurry are mixed and condensed and finally flow back to the dilution tank, and the wet and hot steam is effectively eliminated.
The utility model provides a technical scheme that its technical problem adopted is: a lime slurry preparation system of a waste incineration plant comprises a digestion device, a dilution device and a lime slurry conveying device, wherein a solution prepared by the digestion device flows into the dilution device and is conveyed to an atomizer through the lime slurry conveying device;
the slaking device comprises a lime bin, an ash discharge valve, a screw conveyor and a slaking tank in sequence according to the flowing direction of lime slurry, and further comprises a first tap water branch pipeline flowing into the slaking tank;
the diluting device comprises a diluting tank, an overflow pipeline flowing into the diluting tank from the digestion tank, and a second tap water branch pipeline connected into the diluting tank;
the lime slurry conveying device comprises a conveying pump, a pump inlet pipeline flowing into the conveying pump from the dilution tank, and a slurry output pipeline conveyed to an atomizer by the conveying pump;
the system is characterized by further comprising a Venturi dust removal device, wherein the Venturi dust removal device comprises a Venturi negative-pressure suction washing device and a first lime slurry backflow pipeline, one end of the first lime slurry backflow pipeline is connected with the slurry output pipeline, and the other end of the first lime slurry backflow pipeline is connected with a first inlet of the Venturi negative-pressure suction washing device;
a steam collecting pipeline is further arranged at the top of the digestion tank, one end of the steam collecting pipeline is connected with the digestion tank, and the other end of the steam collecting pipeline is connected with a second inlet of the venturi negative pressure suction washing device; the outlet of the venturi negative pressure suction washing device is connected to the dilution tank.
Preferably, a second lime slurry backflow pipeline is further arranged, one end of the second lime slurry backflow pipeline is connected with the first lime slurry backflow pipeline, and the other end of the second lime slurry backflow pipeline is directly connected into the dilution tank.
Preferably, still set up venturi flushing pipe way, venturi flushing pipe way one end with the second running water lateral conduit be connected and the other end through the tee bend with first lime thick liquid return line inserts together venturi negative pressure suction washing device's first entry sets up the valve on the pipeline, switches through the valve and right venturi negative pressure suction washing device washes.
Preferably, the steam collecting pipeline adopts a corrugated hose, and two ends of the steam collecting pipeline are connected by adopting a quick-connection flange.
The utility model has the advantages that: the utility model provides a msw incineration factory lime thick liquid preparation system owing to set up venturi dust collector, venturi dust collector includes venturi negative pressure suction washing device, through increasing lime thick liquid backflow pipeline, utilizes among the lime thick liquid conveyor some thick liquids of thick liquid output pipeline to flow through venturi negative pressure suction washing device, and in venturi, wet and hot steam mixes with the backward flow thick liquid and condenses, finally flows back to the dilution tank, eliminates wet and hot steam effectively.
Drawings
Fig. 1 is a schematic diagram of the arrangement of the apparatus according to the first embodiment of the present invention.
Fig. 2 is a schematic diagram of an apparatus arrangement according to a second embodiment of the present invention.
Fig. 3 is a schematic diagram of an apparatus arrangement according to a third embodiment of the present invention.
Fig. 4 is a schematic view of an apparatus layout according to a fourth embodiment of the present invention.
In the figure:
1, 1.1 lime bin, 1.2 ash discharge valve, 1.3 screw conveyer, 1.4 digestion tank and 1.5 first tap water branch pipeline;
2, a diluting device, 2.1 a diluting tank, 2.2 an overflow pipeline, 2.3A second tap water branch pipeline and 2.3A Venturi flushing pipeline;
3, a lime slurry conveying device, 3.1 conveying pumps, 3.2A pump inlet pipelines and 3.2B slurry outlet pipelines;
4 venturi dust collector, 4.1 venturi negative pressure suction washing device, 4.1A1 venturi first entry, 4.1A2 venturi second entry, 4.1B venturi second export, 4.2 first lime thick liquid return line, 4.2A second lime thick liquid return line, 4.21 tee bend, 4.3 steam collecting tube.
Detailed Description
Fig. 1 is a schematic diagram of the arrangement of the apparatus according to the first embodiment of the present invention. The figure shows that in the embodiment, the lime slurry preparation system of the waste incineration plant comprises a digestion device 1, a diluting device 2 and a lime slurry conveying device 3; the solution prepared in the digestion unit 1 flows into the dilution unit 2 and is then transported to the atomizer via the lime slurry transport unit 3.
The slaking device 1 sequentially comprises a lime bin 1.1, an ash discharge valve 1.2, a screw conveyor 1.3 and a slaking tank 1.4 according to the flowing direction of lime slurry, and also comprises a first tap water branch pipeline 1.5 flowing into the slaking tank;
the diluting device 2 comprises a diluting tank 2.1, an overflow pipeline 2.2 flowing from the digesting tank 1.4 to the diluting tank 2.1, and a second tap water branch pipeline 2.3 connected to the diluting tank 2.1;
the lime slurry conveying device 3 comprises a conveying pump 3.1, a pump inlet pipeline 3.2A flowing into the conveying pump 3.1 from the dilution tank 2.1, and a slurry output pipeline 3.2B conveyed to an atomizer by the conveying pump 3.1;
in the figure, the device also comprises a Venturi dust removal device 4, the Venturi dust removal device comprises a Venturi negative pressure suction washing device 4.1, a first lime slurry return pipeline 4.2 is also arranged, one end of the first lime slurry return pipeline 4.2 is connected with the slurry output pipeline 3.2B, and the other end of the first lime slurry return pipeline is connected with a first inlet 4.1A1 of the Venturi negative pressure suction washing device 4.1;
a steam collecting pipeline 4.3 is further arranged at the top of the digestion tank 1.4, one end of the steam collecting pipeline 4.3 is connected with the digestion tank 1.5, and the other end is connected with a second inlet 4.1A2 of the Venturi negative pressure suction washing device 4.1; the outlet 4.1B of the venturi negative pressure suction washing device 4.1 is connected to the dilution tank 2.1.
It is shown that in this example, by adding a first lime mud return line 4.2, a part of the mud in the mud outlet line 3.2B of the lime mud delivery device is made to flow through the venturi suction scrubber, where the moist heat steam is mixed with the returned mud and condensed, and finally returned to the dilution tank, thus effectively eliminating the moist heat steam.
Fig. 2 is a schematic diagram of an apparatus arrangement according to a second embodiment of the present invention. In the figure it is shown that, in contrast to the first embodiment, a second lime mud return line 4.2A is also provided, which second lime mud return line 4.2A is connected at one end to the first lime mud return line 4.2 and at the other end directly into the dilution tank 2.1.
Fig. 3 is a schematic diagram of an apparatus arrangement according to a third embodiment of the present invention. In the figure, it is shown that, unlike the first embodiment, in this example, a venturi flushing pipe 2.3A is further provided, one end of the venturi flushing pipe 2.3A is connected to the second tap water branch pipe 2.3, and the other end is connected to the first inlet 4.1a1 of the venturi negative pressure suction washing device 4.1 together with the first lime slurry return pipe 4.2 through a tee joint 4.21, and a valve is provided on the pipe to flush the venturi negative pressure suction washing device 4.1 through valve switching.
Fig. 4 is a schematic view of an apparatus layout according to a fourth embodiment of the present invention. In the figure, it is shown that, in contrast to the first embodiment, the steam collection line 4.3 is in this case a bellows line and is connected at both ends by quick-connect flanges.
Claims (4)
1. A lime slurry preparation system of a waste incineration plant comprises a digestion device, a dilution device and a lime slurry conveying device, wherein a solution prepared by the digestion device flows into the dilution device and is conveyed to an atomizer through the lime slurry conveying device;
the slaking device comprises a lime bin, an ash discharge valve, a screw conveyor and a slaking tank in sequence according to the flowing direction of lime slurry, and further comprises a first tap water branch pipeline flowing into the slaking tank;
the diluting device comprises a diluting tank, an overflow pipeline flowing into the diluting tank from the digestion tank, and a second tap water branch pipeline connected into the diluting tank;
the lime slurry conveying device comprises a conveying pump, a pump inlet pipeline flowing into the conveying pump from the dilution tank, and a slurry output pipeline conveyed to an atomizer by the conveying pump;
the system is characterized by further comprising a Venturi dust removal device, wherein the Venturi dust removal device comprises a Venturi negative-pressure suction washing device and a first lime slurry backflow pipeline, one end of the first lime slurry backflow pipeline is connected with the slurry output pipeline, and the other end of the first lime slurry backflow pipeline is connected with a first inlet of the Venturi negative-pressure suction washing device;
a steam collecting pipeline is further arranged at the top of the digestion tank, one end of the steam collecting pipeline is connected with the digestion tank, and the other end of the steam collecting pipeline is connected with a second inlet of the venturi negative pressure suction washing device; the outlet of the venturi negative pressure suction washing device is connected to the dilution tank.
2. The lime mud preparation system of claim 1, wherein a second lime mud recirculation line is further provided, one end of the second lime mud recirculation line is connected to the first lime mud recirculation line, and the other end of the second lime mud recirculation line is directly connected to the dilution tank.
3. The lime mud preparation system of claim 1, wherein a venturi flushing pipe is further provided, one end of the venturi flushing pipe is connected to the second tap water branch pipe, the other end of the venturi flushing pipe is connected to the first inlet of the venturi negative pressure suction washing device together with the first lime mud return pipe through a tee joint, a valve is arranged on the pipe, and the venturi negative pressure suction washing device is flushed by switching the valve.
4. The lime mud preparation system of claim 1, wherein the steam collection pipe is a corrugated hose and is connected at both ends by a quick-connect flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022554821.3U CN214106408U (en) | 2020-11-06 | 2020-11-06 | Lime slurry preparation system of waste incineration plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022554821.3U CN214106408U (en) | 2020-11-06 | 2020-11-06 | Lime slurry preparation system of waste incineration plant |
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| Publication Number | Publication Date |
|---|---|
| CN214106408U true CN214106408U (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022554821.3U Active CN214106408U (en) | 2020-11-06 | 2020-11-06 | Lime slurry preparation system of waste incineration plant |
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| CN (1) | CN214106408U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843947A (en) * | 2020-12-31 | 2021-05-28 | 深圳市能源环保有限公司 | Dust removal method for lime slurry preparation system of waste incineration plant |
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2020
- 2020-11-06 CN CN202022554821.3U patent/CN214106408U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843947A (en) * | 2020-12-31 | 2021-05-28 | 深圳市能源环保有限公司 | Dust removal method for lime slurry preparation system of waste incineration plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 541000 Shankou domestic waste sanitary landfill, Shuikou village, Lingui Town, Lingui District, Guilin City, Guangxi Zhuang Autonomous Region Patentee after: Guilin Shenneng environmental protection Co.,Ltd. Patentee after: Chaozhou Shenneng environmental protection Co.,Ltd. Patentee after: Shenzhen Energy and environmental protection Co.,Ltd. Patentee after: Shenzhen Shenneng environmental protection East Co.,Ltd. Patentee after: Shenzhen Shenneng Environmental Protection City Environmental Service Co.,Ltd. Patentee after: WUHAN SHENNENG ENVIRONMENTAL PROTECTION NEW DITCH WASTE POWER GENERATION Co.,Ltd. Patentee after: Shanxian Shenneng environmental protection Co.,Ltd. Address before: 541000 Shankou domestic waste sanitary landfill, Shuikou village, Lingui Town, Lingui District, Guilin City, Guangxi Zhuang Autonomous Region Patentee before: Guilin Shenneng environmental protection Co.,Ltd. Patentee before: Chaozhou Shenneng environmental protection Co.,Ltd. Patentee before: SHENZHEN ENERGY ENVIRONMENTAL ENGINEERING Co.,Ltd. Patentee before: Shenzhen Shenneng environmental protection East Co.,Ltd. Patentee before: Shenzhen Shenneng Environmental Protection City Environmental Service Co.,Ltd. Patentee before: WUHAN SHENNENG ENVIRONMENTAL PROTECTION NEW DITCH WASTE POWER GENERATION Co.,Ltd. Patentee before: Shanxian Shenneng environmental protection Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |