CN210009803U - Three-cycle desulfurization and white-removing integrated device - Google Patents
Three-cycle desulfurization and white-removing integrated device Download PDFInfo
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- CN210009803U CN210009803U CN201822110179.2U CN201822110179U CN210009803U CN 210009803 U CN210009803 U CN 210009803U CN 201822110179 U CN201822110179 U CN 201822110179U CN 210009803 U CN210009803 U CN 210009803U
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Abstract
The utility model relates to a three-cycle desulfurization and white elimination integrated device, which comprises a desulfurization and white elimination tower, supply thick liquid module and confession condensate water module, the flue gas entry of desulfurization white tower is equipped with the two-way spraying desulphurization unit of one-level, the two-way spraying desulphurization unit of one-level with supply thick liquid module to link to each other through outer circulation pipeline and outer circulation pump, the inner loop thick liquid pond is linked together through the pipeline with supplying thick liquid module, the tower body middle part is equipped with the inner loop desulfurization and sprays the layer, the inner loop desulfurization sprays the layer and links to each other through inner circulation pump and inner circulation pipeline, second grade centrifugal tube bank defroster lower part is equipped with disappears and clearly sprays the layer, disappear and clearly spray the layer and pass through condensate water circulating pump and condensation circulation pipeline with supplying the condensate water module and link to each other, air distribution plate lower part is equipped with the ring that catchments, catchments the ring and is equipped with the hole that leaks, catch. The utility model discloses desulfurization efficiency is high, can reduce desulphurization unit's energy consumption, reduction equipment wearing and tearing, can realize that the flue gas disappears white, desulfurization integration and handles.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection is handled, concretely relates to three circulation desulfurization white integrated device that disappears.
Background
Most domestic flue gas desulfurization facilities adopt wet flue gas desulfurization (limestone-gypsum method or ammonia method or double-alkali method), and the common wet flue gas desulfurization technical route is the traditional single-cycle wet flue gas desulfurization. The traditional single-cycle desulfurization is that the number of spraying layers is increased on the basis of the former empty tower spraying, the problems of unstable desulfurization efficiency, high energy consumption and serious equipment abrasion generally exist, and particularly for high-sulfur coal, the single cycle is difficult to meet the emission requirement.
The temperature of clean flue gas at the outlet of a normal wet desulphurization tower is 48-60 ℃, the humidity of the flue gas is saturated, the flue gas is condensed when meeting cold air, so that 'white smoke' appears in a chimney, a long tail is carried, and the 'white smoke' contains a large amount of water mist, smoke dust and dissolved salts; although the common wet electrostatic dust collector can remove the smoke dust in the flue gas, water mist and dissolved salt cannot be removed; although the purpose of cooling the flue gas can be achieved by adding the heat exchanger, the flue gas after desulfurization has strong corrosivity, the material requirement of the heat exchanger is high, the cost is greatly increased, and the occupied area is large.
In summary, it is desirable to provide a three-cycle desulfurization and whitening integrated device with high desulfurization efficiency, which can reduce the energy consumption of the desulfurization device, reduce the equipment wear, and simultaneously realize whitening.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a three-cycle desulfurization and white elimination integrated device which has high desulfurization efficiency, can reduce the energy consumption of a desulfurization device and reduce the abrasion of equipment and can realize white elimination at the same time.
The above purpose is realized by the following technical scheme: a three-cycle desulfurization and whitening integrated device comprises a desulfurization and whitening tower, a slurry supply module and a condensate supply module, wherein the desulfurization and whitening tower comprises a tower body, the bottom and the top of the tower body are respectively provided with an internal circulation slurry pool and a flue gas outlet, the desulfurization and whitening tower is provided with a one-level two-way spray desulfurization device at a flue gas inlet, the one-level two-way spray desulfurization device is connected with the slurry supply module through an external circulation pipeline and an external circulation pump, the slurry sprayed by the one-level two-way spray desulfurization device is stored in the internal circulation slurry pool, the internal circulation slurry pool is communicated with the slurry supply module through a pipeline, the middle part of the tower body is provided with an internal circulation desulfurization spray layer, the upper part of the internal circulation slurry pool is provided with a primary oxidation device, the internal circulation desulfurization spray layer is connected with the internal circulation slurry pool through an internal circulation pump and an internal circulation pipeline, the tower body is provided with a one-level demister at the upper part of, flue gas exit is equipped with second grade centrifugal tube bank defroster in the tower body, second grade centrifugal tube bank defroster lower part is equipped with disappears and sprays the layer, disappear white spray the layer with supply the condensate water module to pass through the condensate water circulating pump and the condensation circulating pipe links to each other, it is equipped with the air current equipartition board to disappear white spray the layer lower part, air current equipartition board lower part is equipped with the ring that catchments, it is equipped with the hole that leaks to catchment the ring, catchment the ring week portion with tower body inner wall fixed connection, catchment the ring with be equipped with the collecting hopper between the one-level defroster, the collecting hopper with supply the condensate water module to.
The utility model discloses a supply the thick liquid module to provide the lime stone thick liquid for the desulfurization, supply the thick liquid module, an oxidation unit, the two-way spray desulfurization device of one-level and desulfurization disappear white tower and pass through outer circulating pump and outer circulating line and constitute outer circulating system, high PH value outer circulating slurry is by outer circulating pump sending to the two-way spray desulfurization device of one-level of desulfurization white tower flue gas entrance department, in the two-way spray desulfurization device of one-level, the flue gas passes through flue gas pipeline and gets into the tower body, the velocity of flow when the device passes through is higher because of the flue gas, thereby high PH value outer circulating slurry forms strong torrent with hot flue gas, strong broken thick liquid drips, greatly increased the mass transfer between the gas-liquid phase, the heat transfer surface, to improving desulfurization efficiency, reduce the circulating liquid volume, it has obvious effect to reduce the operation power consumption, flue gas entry one-level two-way spray desulfurization device accomplishes desulfurization efficiency more than 80%, low PH value thick liquid after the desulfurization device after the desulfurization deposits in the inner circulating slurry Circulating after treatment; the internal circulation desulfurization spraying layer, the internal circulation slurry pool, the primary oxidation device, the internal circulation pump and the internal circulation pipeline form a desulfurization internal circulation system, the flue gas enters the desulfurization and whitening tower after passing through the primary two-way spray desulfurization device at the flue gas inlet, the internal circulation slurry is conveyed to the internal circulation spray desulfurization device by the internal circulation pump, the slurry is dispersed into fine fog drops by a plurality of nozzles, the fog drops are fully contacted with sulfur dioxide in the flue gas to remove the sulfur dioxide, and the desulfurized slurry is oxidized by the primary oxidation device, falls into the internal circulation box and is circularly conveyed by the internal circulation pump; the desulfurization efficiency of the internal circulation desulfurization and the external circulation desulfurization reaches over 99.5 percent, the temperature of the flue gas at the desulfurization inlet is 110-160 ℃, and the temperature of the flue gas after desulfurization is about 45-60 ℃.
The condensation and white elimination system comprises a liquid collecting hopper, a liquid collecting ring, a gas-liquid distribution plate, a white elimination spraying layer, a condensate water supply module, a condensate water circulating pump and a condensation circulating pipeline, condensate water (with the water temperature of 35-45 ℃) is sent to a plate heat exchanger from a condensate water tank and is cooled to 25-35 ℃, the cooled condensate water is sent to the white elimination spraying layer, the condensate water is atomized into fine fog drops by a plurality of nozzles, desulfurized saturated wet flue gas and the condensate water fog drops are in full contact heat exchange, the flue gas is cooled to 40-48 ℃ from 45-60 ℃, the condensate water is heated to 35-45 ℃ from 25-35 ℃, the water fog and dissolved salt in the flue gas are condensed, white smoke is eliminated, the requirement of national environmental protection on the temperature of the flue gas is met, the desulfurized saturated wet flue gas is condensed and cooled to generate condensate water, and the condensate water flows back to the condensate water supply module.
The utility model discloses a white integrated device that disappears of three circulation desulfurization can improve desulfurization efficiency greatly, reduce desulphurization unit's energy consumption, reduce equipment wear, extrinsic cycle desulfurization efficiency reaches more than 80%, the inner loop desulfurization combines extrinsic cycle desulfurization efficiency to reach more than 99.5%, disappear white and spray the layer with desulfurization back flue gas temperature by 45 ~ 60 ℃ cooling to 40 ~ 48 ℃, get off the water smoke in the flue gas with the salt condensation that dissolves, subduct white cigarette, reach the requirement of national environmental protection to flue gas temperature.
The further technical scheme is that the internal circulation desulfurization spraying layer comprises a plurality of spraying devices which are arranged in parallel from top to bottom, and the plurality of spraying devices are respectively communicated with the internal circulation slurry tank through an internal circulation pump and an internal circulation pipeline. Therefore, the secondary flue gas desulfurization process still comprises a plurality of desulfurization processes, the desulfurization efficiency can be improved, and the environmental pollution is reduced.
A further technical scheme is, supply the thick liquids module to include extrinsic cycle thick liquids case and limestone powder warehouse, lime petrochemical industry thick liquids case and the limestone thick liquids case that communicates in proper order, the limestone thick liquids case with the two-way spray desulfurization device of one-level passes through pipeline and outer circulating pump intercommunication, the inner loop thick liquids pond with the extrinsic cycle thick liquids case is linked together through the pipeline, the extrinsic cycle thick liquids case be equipped with secondary oxidation device and with limestone thick liquids case intercommunication.
Thus, limestone powder falls to the limestone-petrochemical slurry tank from the storage bin, the prepared limestone slurry automatically flows to the limestone-slurry tank, the limestone slurry in the limestone-slurry tank is conveyed to the primary two-way spray desulfurization device through the pipeline and the external circulation pump, the desulfurized slurry overflows to the external circulation slurry tank from the slurry (pH4.8-5.8) of the internal circulation slurry pool, secondary oxidation is carried out in the external circulation tank under the action of the secondary oxidation device, and the slurry after secondary oxidation flows into the limestone-slurry tank (pH5.8-6.5) from the external circulation tank for recycling.
The technical scheme is that the condensate supplying module comprises a condensate tank, a plate heat exchanger and a cooling tower, the cooling tower is used for storing cooling water and is in circulating connection with the plate heat exchanger through a pump and a pipeline, the condensate tank is used for storing condensate water and is connected with the white eliminating spraying layer through a condensate water circulating pump and a condensate circulating pipeline, the condensate circulating pipeline passes through the plate heat exchanger, the collecting hopper is communicated with the condensate tank, and the collecting hopper, the collecting ring, the gas-liquid distributing plate, the white eliminating spraying layer, the condensate tank, the plate heat exchanger, the cooling tower, the condensate water circulating pump and the condensate circulating pipeline form a condensate white eliminating circulating system.
Condensed water (with the water temperature of 35-45 ℃) is sent to a plate heat exchanger from a condensed water tank by a condensed water circulating pump to be cooled to 25-35 ℃, the cooled condensed water is sent to a white elimination spraying layer, the condensed water is atomized into fine fog drops by a plurality of nozzles, desulfurized saturated wet flue gas and the condensed water fog drops are in full contact heat exchange, the temperature of the flue gas is reduced to 40-48 ℃ from 45-60 ℃, the temperature of the condensed water is increased to 35-45 ℃ from 25-35 ℃, the cooling medium of the plate heat exchanger is circulating cooling water (with the water temperature of 20-30 ℃), the heated circulating cooling water (with the water temperature of 30-40 ℃) returns to a cooling tower to be cooled to 20-30 ℃, and the condensed water.
The further technical scheme is that the condensate water tank is provided with an overflow hole, the overflow hole is provided with an overflow pipe, the overflow pipe is connected with a condensate water collecting box, and the condensate water collecting box is communicated with the lime petrochemical slurry tank through a recovery pump and a recovery pipeline. The desulfurized saturated wet flue gas is condensed and cooled to generate condensed water, and the condensed water in the condensed water tank can be gradually increased, flows to the condensed water collecting tank from the overflow hole, and is conveyed to the limestone slurry tank for water supplement through the recovery pump.
Further technical scheme is, desulfurization white integrated device that disappears still includes dewatering system, dewatering system includes gypsum discharge pump, swirler and hydroextractor, extrinsic cycle thick liquid bottom of the case portion is passed through gypsum discharge pump and pipeline with in proper order swirler and hydroextractor link to each other, the liquid outlet of swirler and hydroextractor respectively through the pipeline with the lime petrochemical industry thick liquid case is linked together. If the part of the slurry in the circulating slurry box is conveyed to the cyclone by the gypsum discharge pump for primary dehydration, the underflow high-concentration slurry of the cyclone is conveyed to the dehydrator for secondary dehydration, and the overflow low-concentration slurry of the cyclone is conveyed to the limestone slurry box for water supplement.
The further technical scheme is that a gas-liquid separation tank is arranged between the dehydrator and the lime and petrochemical slurry tank. The gas-liquid separation tank is provided with a prefabricated vacuum pump used in a matched manner.
The further technical scheme is that the primary oxidation device and the secondary oxidation device are respectively provided with an oxidation fan which is matched with the primary oxidation device and the secondary oxidation device for use.
The further technical scheme is that demister washers are arranged on the upper portions of the first-stage demister and the second-stage centrifugal tube bundle demister. The demister washer is connected with the washing water pipe.
The further technical scheme is that a flue gas outlet of the tower body is communicated with a chimney.
The utility model discloses with the desulfurization, with the condensation disappear white efficient integrated device that becomes, the comdenstion water can reuse through plate heat exchanger and recirculated cooling water heat transfer, can not only improve desulfurization efficiency greatly, reduce desulphurization unit's energy consumption, the reduction equipment wearing and tearing, outer loop desulfurization efficiency reaches more than 80%, the inner loop desulfurization combines outer loop desulfurization efficiency to reach more than 99.5%, disappear white layer and spray the layer and lower to 40 ~ 48 ℃ by 45 ~ 60 ℃ of flue gas temperature behind the desulfurization, with the water smoke in the flue gas with dissolve the salt condensation get off, subduct white cigarette, reach the requirement of national environmental protection to flue gas temperature.
The three-circulation is the combination of external circulation, internal circulation and condensation circulation.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.
Fig. 1 is a schematic layout view of a desulfurization and whitening integrated device according to an embodiment of the present invention.
In the figure:
1 tower body 2 internal circulation slurry pool 3 stirrer 4 smoke outlet
5 chimney 6 one-stage bidirectional spray desulfurization device 7 external circulation pump 8 external circulation pipeline
9 water collecting ring 10 two-stage centrifugal tube bundle demister 11 primary oxidation device 12 internal circulation pump
13 a liquid collecting bucket 14 internal circulation desulfurization spraying layer 15 internal circulation pipeline 16 white-removing spraying layer
17 18 air current equipartition boards of cooling tower 19 one-level defroster 20 defroster purgers
21 overflow pipe 22 cleaning water pipe 23 flue gas pipeline 24 condensation circulating pipeline
25 vacuum pump 26 external circulation slurry box 27 limestone powder storage 28 limestone petrochemical slurry box
29 recovery pump 30 limestone slurry tank 31 condensed water collecting box 32 plate heat exchanger
33 cyclone 34 secondary oxidation device 35 gypsum discharge pump 36 condensed water circulating pump
37 dehydrator 38 condensate water tank 39 oxidation fan 40 gas-liquid separation jar
41 recovery pipeline
Detailed Description
The present invention will be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
The embodiment of the utility model provides a as follows, refer to fig. 1, a white integrated device of three circulation desulfurization disappears, disappear white tower, supply thick liquid module and supply condensate water module including the desulfurization, the desulfurization disappears white tower and includes tower body 1, 1 bottom of tower body and top are equipped with inner loop thick liquid pond 2 and exhanst gas outlet 4 respectively, the desulfurization disappears white tower and is equipped with one-level two-way spray desulphurization unit 6 at flue gas inlet, one-level two-way spray desulphurization unit 6 with it links to each other through extrinsic cycle pipeline 8 and extrinsic cycle pump 7 to supply the thick liquid module, 6 spun thick liquids of one-level two-way spray desulphurization unit store in inner loop thick liquid pond 2, inner loop thick liquid pond 2 with it is linked together through the pipeline to supply the thick liquid module, tower body 1 middle part is equipped with inner loop desulfurization spray layer 14, 2 upper portions in inner loop thick liquid pond are equipped with primary oxidation device 11, inner loop desulfurization spray layer 14 links to each other with inner loop thick liquid pond 2 through inner loop thick liquid 12 and inner loop pipeline 15 The utility model discloses a desulfurization spray layer 14, including tower body 1, 4 departments of exhanst gas outlet are equipped with second grade centrifugal tube bank defroster 10 in the tower body 1, second grade centrifugal tube bank defroster 10 lower part is equipped with disappears and clearly sprays layer 16, disappear and clearly spray layer 16 with supply the condensate water module to pass through condensate circulating pump 36 and condensation circulating line 24 and link to each other, it clearly sprays 16 lower parts on layer and is equipped with air current equipartition board 18 to disappear, air current equipartition board 18 lower part is equipped with the ring 9 that catchments, it is equipped with the hole that leaks to catchment the ring 9, catchment ring 9 week portion with 1 inner wall fixed connection of tower body, catchment ring 9 with be equipped with collecting hopper 13 between the first grade defroster 19, collecting hopper 13 with supply the condensate water module to be linked together.
The utility model discloses a supply the thick liquid module to provide the lime stone thick liquid for the desulfurization, supply the thick liquid module, primary oxidation device 11, one-level two-way spray desulphurization device 6 and desulfurization white tower constitute sulphur outer circulating system through outer circulating pump 7 and outer circulating pipeline 8, high PH value outer circulating thick liquid is sent to the one-level two-way spray desulphurization device 6 of desulfurization white tower flue gas entrance by outer circulating pump 7, in one-level two-way spray desulphurization device 6, the flue gas passes through flue gas pipeline 23 and gets into tower body 1, because the velocity of flow of flue gas when the device passes through is higher, thereby high PH value outer circulating thick liquid forms strong torrent with hot flue gas, the broken thick liquid drips of strong, greatly increased the mass transfer between the gas-liquid phase, the heat transfer surface, to improving desulfurization efficiency, reduce circulation liquid measure, reduce the operation power consumption and have obvious effect, flue gas entrance one-level two-way spray desulphurization device 6 accomplishes the desulfurization efficiency more than 80, the desulfurized low-pH value slurry is oxidized by the primary oxidation device 11, stored in the internal circulation slurry pool 2 and can overflow to the slurry supply module for circulation after being treated; the internal circulation desulfurization spraying layer 14, the internal circulation slurry pool 2, the primary oxidation device 11, the internal circulation pump 12 and the internal circulation pipeline 15 form a desulfurization internal circulation system, the flue gas enters the desulfurization and whitening tower after passing through the primary two-way spray desulfurization device 6 at the flue gas inlet, the internal circulation slurry is conveyed to the internal circulation spray desulfurization device by the internal circulation pump 12, the slurry is dispersed into fine fog drops by a plurality of nozzles, the fog drops are fully contacted with sulfur dioxide in the flue gas to remove the sulfur dioxide, the desulfurized slurry is oxidized by the primary oxidation device 11 and then falls into the internal circulation slurry pool 2, a stirrer 3 is arranged in the pool and is circularly conveyed by the internal circulation pump 12; the desulfurization efficiency of the internal circulation desulfurization and the external circulation desulfurization reaches over 99.5 percent, the temperature of the flue gas at the desulfurization inlet is 110-160 ℃, and the temperature of the flue gas after desulfurization is about 45-60 ℃.
The liquid collecting hopper 13, the liquid collecting ring, the gas-liquid distribution plate, the white eliminating spraying layer 16, the condensate water supplying module, the condensate water circulating pump 36 and the condensation circulating pipeline 24 form a condensation white eliminating circulating system, condensate water (water temperature is 35-45 ℃) is sent to the plate heat exchanger 32 from the condensate water tank 38 to be cooled to 25-35 ℃, the cooled condensate water is sent to the white eliminating spraying layer 16, the condensate water is atomized into fine fog drops by a plurality of nozzles, the desulfurized saturated wet flue gas and the condensate water fog drops are in full contact heat exchange, the temperature of the flue gas is reduced to 40-48 ℃ from 45-60 ℃, the temperature of the condensate water is increased to 35-45 ℃ from 25-35 ℃, the water fog and dissolved salt in the flue gas are condensed, white smoke is eliminated, the requirement of national environmental protection on the temperature of the flue gas is met, the desulfurized saturated wet flue gas is condensed and cooled to generate condensate water, and the condensate water flows back to the.
The utility model discloses a white integrated device that disappears of three circulation desulfurization can improve desulfurization efficiency greatly, reduce desulphurization unit's energy consumption, reduce equipment wear, extrinsic cycle desulfurization efficiency reaches more than 80%, the inner loop desulfurization combines extrinsic cycle desulfurization efficiency to reach more than 99.5%, disappear white and spray layer 16 with desulfurization back flue gas temperature by 45 ~ 60 ℃ cooling to 40 ~ 48 ℃, get off the water smoke in the flue gas with the salt condensation that dissolves, subduct white cigarette, reach the requirement of national environmental protection to flue gas temperature.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the internal circulation desulfurization spraying layer 14 includes a plurality of spraying devices arranged in parallel from top to bottom, and the plurality of spraying devices are respectively communicated with the internal circulation slurry tank 2 through an internal circulation pump 12 and an internal circulation pipeline 15. Therefore, the secondary flue gas desulfurization process still comprises a plurality of desulfurization processes, the desulfurization efficiency can be improved, and the environmental pollution is reduced.
On the basis of the above-mentioned embodiment, in the utility model discloses in another embodiment, as fig. 1, supply the thick liquid module to include extrinsic cycle thick liquid case 26 and limestone powder warehouse 27, limestone-petrochemical industry thick liquid case 28 and limestone-slurry case 30 that communicate in proper order, limestone-slurry case 30 with one-level two-way spray desulphurization unit 6 passes through pipeline and external circulation pump 7 intercommunication, inner loop thick liquid pond 2 with extrinsic cycle thick liquid case 26 is linked together through the pipeline, extrinsic cycle thick liquid case 26 be equipped with secondary oxidation device 34 and with limestone-slurry case 30 intercommunication.
Thus, limestone powder falls from the storage bin to the limestone-petrochemical slurry tank 28, the prepared limestone slurry automatically flows to the limestone-slurry tank 30, the limestone slurry in the limestone-slurry tank 30 is conveyed to the primary two-way spray desulfurization device 6 through the pipeline and the external circulating pump 7, the desulfurized slurry overflows to the external circulating slurry tank 26 from the slurry (pH4.8-5.8) in the internal circulating slurry pool 2, secondary oxidation is carried out in the external circulating tank under the action of the secondary oxidation device 34, and the slurry after secondary oxidation flows into the limestone-slurry tank 30(pH5.8-6.5) from the external circulating tank for recycling.
On the basis of the above-mentioned embodiment, the utility model discloses in another embodiment, as fig. 1, supply the condensate water module to include condensate water tank 38, plate heat exchanger 32 and cooling tower 17, cooling tower 17 be used for storing cooling water and with plate heat exchanger 32 passes through pump and pipeline circulation connection, condensate water tank 38 be used for storing the comdenstion water and through comdenstion water circulating pump 36 and condensation circulating line 24 with it disappears white and sprays layer 16 and link to each other, condensation circulating line 24 passes through plate heat exchanger 32, collecting hopper 13 with condensate water tank 38 is linked together, collecting hopper 13, liquid collecting ring, gas-liquid distribution board, disappear white and spray layer 16, condensate water tank 38, plate heat exchanger 32, cooling tower 17, comdenstion water circulating pump 36 and condensation circulating line 24 and constitute condensation and disappear white circulation system.
Condensed water (with the water temperature of 35-45 ℃) is sent to the plate heat exchanger 32 from a condensed water tank 38 by a condensed water circulating pump 36 to be cooled to 25-35 ℃, the cooled condensed water is sent to the white elimination spraying layer 16, the condensed water is atomized into fine fog drops by a plurality of nozzles, desulfurized saturated wet flue gas and the condensed water fog drops are in full contact heat exchange, the temperature of the flue gas is reduced to 40-48 ℃ from 45-60 ℃, the temperature of the condensed water is increased to 35-45 ℃ from 25-35 ℃, the cooling medium of the plate heat exchanger 32 is circulating cooling water (with the water temperature of 20-30 ℃), the heated circulating cooling water (with the water temperature of 30-40 ℃) returns to the cooling tower 17 to be cooled to 20-30 ℃, and the condensed water is recycled.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the condensed water tank 38 is provided with an overflow hole, the overflow hole is provided with an overflow pipe 21, the overflow pipe 21 is connected to the condensed water collection box 31, and the condensed water collection box 31 is communicated with the lime-petrochemical slurry tank 28 through a recovery pump 29 and a recovery pipeline 41. The desulfurized saturated wet flue gas is condensed and cooled to generate condensed water, and the condensed water in the condensed water tank 38 is gradually increased, flows to the condensed water collecting tank 31 from the overflow hole, and is conveyed to the limestone slurry tank 28 for water supplement through the recovery pump 29.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the desulfurization and de-whitening integrated device further includes a dewatering system, the dewatering system includes a gypsum discharge pump 35, a cyclone 33 and a dewatering machine 37, the bottom of the external circulation slurry tank 26 is passed through the gypsum discharge pump 35 and a pipeline, and the cyclone 33 and the dewatering machine 37 are connected in turn, and the liquid outlets of the cyclone 33 and the dewatering machine 37 are respectively communicated with the lime and petrochemical slurry tank 28 through pipelines. If the part of the slurry in the circulating slurry tank 26 is conveyed to the cyclone 33 by the gypsum discharge pump 35 for primary dewatering, the underflow high-concentration slurry in the cyclone 33 is secondarily dewatered by the dewatering machine 37, and the overflow low-concentration slurry in the cyclone 33 is replenished with water in the lime-petrochemical slurry tank 28.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, a gas-liquid separation tank 40 is disposed between the dewatering machine 37 and the lime-petrochemical slurry tank 28. The gas-liquid separation tank 40 is provided with a prefabricated vacuum pump 25 which is used in a matched manner.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the primary oxidation device 11 and the secondary oxidation device 34 are respectively provided with an oxidation fan 39 used in cooperation therewith.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the upper portions of the first-stage demister 19 and the second-stage centrifugal tube bundle demister 10 are both provided with demister washers 20. The demister washer 20 is connected to the wash water pipe 22.
On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the flue gas outlet 4 of the tower body 1 is communicated with the chimney 5.
The utility model discloses with the desulfurization, with the condensation disappear white efficient integrated device that becomes, the comdenstion water can reuse through plate heat exchanger 32 and recirculated cooling water heat transfer, can not only improve desulfurization efficiency greatly, reduce desulphurization unit's energy consumption, reduce equipment wear, extrinsic cycle desulfurization efficiency reaches more than 80%, the inner loop desulfurization combines extrinsic cycle desulfurization efficiency to reach more than 99.5%, disappear white layer 16 and spray the flue gas temperature after with the desulfurization by 45 ~ 60 ℃ of cooling down to 40 ~ 48 ℃, get off the water smoke in the flue gas with the salt condensation that dissolves, subduct white cigarette, reach the requirement of national environmental protection to flue gas temperature.
For those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides a white integrated device of three circulation desulfurization disappears, its characterized in that, including desulfurization disappear white tower, supply thick liquid module and supply the condensate water module, desulfurization disappear white tower and include the tower body, tower body bottom and top are equipped with inner loop thick liquid pond and exhanst gas outlet respectively, desulfurization disappear white tower and be equipped with one-level two-way spray desulfurization device at the flue gas entry, one-level two-way spray desulfurization device with supply thick liquid module to pass through outer circulation pipeline and outer circulation pump and link to each other, the thick liquid of one-level two-way spray desulfurization device spun is stored in inner loop thick liquid pond, inner loop thick liquid pond with supply thick liquid module to pass through the pipeline and be linked together, the tower body middle part is equipped with inner loop desulfurization spray layer, inner loop thick liquid pond upper portion is equipped with primary oxidation device, inner loop desulfurization spray layer links to each other with inner loop thick liquid pond through inner loop circulating pump and inner loop pipeline, the upper portion that the layer was sprayed in the inner loop desulfurization of tower body is equipped with the one-level defroster, flue gas exit is equipped with second grade centrifugal tube bank defroster in the tower body, second grade centrifugal tube bank defroster lower part is equipped with disappears and whitely sprays the layer, disappear whitely spray the layer with supply the condensate water module to pass through the comdenstion water circulating pump and the condensation circulating line links to each other, it is equipped with the air current equipartition board to disappear whitely to spray the layer lower part, air current equipartition board lower part is equipped with the ring that catchments, it is equipped with the hole that leaks to catchment the ring, catchment the ring week portion with tower body inner wall fixed connection, catchment the ring with be equipped with the collecting hopper.
2. The integrated device of claim 1, wherein the internal circulation desulfurization and de-whitening layer comprises a plurality of spray devices arranged in parallel up and down, and the spray devices are respectively communicated with the internal circulation slurry tank through an internal circulation pump and an internal circulation pipeline.
3. The integrated three-cycle desulfurization and whitening device according to claim 1, wherein the slurry supply module comprises an external circulation slurry tank, and a limestone powder storage bin, a limestone-petrochemical slurry tank and a limestone slurry tank which are sequentially communicated, the limestone slurry tank is communicated with the primary two-way spray desulfurization device through a pipeline and an external circulation pump, the internal circulation slurry tank is communicated with the external circulation slurry tank through a pipeline, and the external circulation slurry tank is provided with a secondary oxidation device and is communicated with the limestone slurry tank.
4. The three-cycle desulfurization and whitening integrated device according to claim 3, wherein the condensate water supply module comprises a condensate water tank, a plate heat exchanger and a cooling tower, the cooling tower is used for storing cooling water and is circularly connected with the plate heat exchanger through a pump and a pipeline, the condensate water tank is used for storing condensate water and is connected with the whitening spraying layer through a condensate water circulating pump and a condensate circulating pipeline, the condensate circulating pipeline passes through the plate heat exchanger, the liquid collecting hopper is communicated with the condensate water tank, and the liquid collecting hopper, the liquid collecting ring, the gas-liquid distribution plate, the whitening spraying layer, the condensate water tank, the plate heat exchanger, the cooling tower, the condensate water circulating pump and the condensate circulating pipeline form a condensation whitening circulating system.
5. The integrated three-cycle desulfurization and whitening device according to claim 4, wherein the condensate tank is provided with an overflow hole, the overflow hole is provided with an overflow pipe, the overflow pipe is connected with a condensate collecting box, and the condensate collecting box is communicated with the limestone slurry tank through a recovery pump and a recovery pipeline.
6. The integrated three-cycle desulfurization and whitening device according to any one of claims 3 to 5, further comprising a dewatering system, wherein the dewatering system comprises a gypsum discharge pump, a cyclone and a dehydrator, the bottom of the external circulation slurry tank is connected with the cyclone and the dehydrator in sequence through the gypsum discharge pump and a pipeline, and the liquid outlets of the cyclone and the dehydrator are respectively communicated with the limestone slurry tank through pipelines.
7. The integrated three-cycle desulfurization and whitening apparatus according to claim 6, wherein a gas-liquid separation tank is disposed between the dehydrator and the limestone-chemical slurry tank.
8. The integrated three-cycle desulfurization and whitening device according to claim 7, wherein the primary oxidation device and the secondary oxidation device are respectively provided with an oxidation fan used in cooperation therewith.
9. The integrated three-cycle desulfurization and whitening device according to claim 7, wherein demister washers are arranged at the upper parts of the primary demister and the secondary centrifugal tube bundle demister.
10. The integrated three-cycle desulfurization and whitening apparatus according to claim 9, wherein the flue gas outlet of the tower body is communicated with a chimney.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109432969A (en) * | 2018-12-14 | 2019-03-08 | 湖南正明科技发展有限公司 | A kind of three-circulation desulphurization disappears white integrated apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109432969A (en) * | 2018-12-14 | 2019-03-08 | 湖南正明科技发展有限公司 | A kind of three-circulation desulphurization disappears white integrated apparatus |
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