CN212701118U

CN212701118U - Dry tail gas dust collector of potassium salt

Info

Publication number: CN212701118U
Application number: CN202020854840.5U
Authority: CN
Inventors: 卢志斌; 卜俊芬; 于海; 谭勤俭; 刘宏印; 侯伟
Original assignee: China Bluestar Chonfar Engineering and Technology Co Ltd
Current assignee: China Bluestar Chonfar Engineering and Technology Co Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-03-16
Anticipated expiration: 2030-05-20

Abstract

The utility model provides a dry tail gas dust collector of sylvite, is including installing the cyclone at drying equipment tail fan housing top, cyclone connects gradually sack cleaner and wet dust collector through the tuber pipe, its characterized in that: the wet dust collector comprises a washing tower and a water circulating device, wherein turbulent contact type materials are filled in the middle of the washing tower, a demisting device is arranged in an upper cavity, and the water circulating device is connected with the upper cavity and a lower cavity of the washing tower and recycles washing liquid in the washing tower. Utilize the utility model discloses collect the dust removal to the dry tail gas of potassium salt, not only can retrieve the dust that smugglies secretly in the tail gas and improve the productivity, eliminate the negative effects of dust to the environment, still can improve fresh water resource utilization ratio, reduce the production sewage and discharge to obtain better comprehensive benefits.

Description

Dry tail gas dust collector of potassium salt

Technical Field

The utility model relates to a tail gas clean-up handles the field, concretely relates to dry tail gas dust collector of sylvite.

Background

The washing tower is widely applied to the aspects of industrial waste gas purification treatment, industrial waste gas purification, dust removal and the like at present. In the field of drying of potassium salts, a great deal of practice is available for dry dust removal, wet dust removal or a combination of the dry dust removal and the wet dust removal, and then due to the fact that the particularity of a potassium salt drying system and the particularity of the properties of potassium salt materials are not fully considered, good effects are not obtained in industrial practice, and with the improvement of the national requirements for environmental protection, a dust removal process scheme with better effects needs to be explored. At present, the common washing tower adopts two-layer spraying design, and most of the spraying nozzles adopt spiral nozzles, so that sprayed water is in a water curtain shape, waste gas cannot be effectively adsorbed, and the purifying effect is not ideal.

The technical scheme disclosed in CN 104984627 a is that waste gas is contacted with a tiled splitter plate inside the scrubber tower, and is staggered with a water film generated by the tiled splitter plate and a nozzle, so that the water film adsorbs the waste gas. The technical scheme does not consider the characteristic that the potassium salt is easy to salt, and is not suitable for drying the potassium salt.

The technical scheme disclosed by CN 209900968U is that a high-efficiency cyclone water film washing tower is adopted, a high-efficiency filter is fixedly arranged at the outlet end of the upper part of a washing tower body, and a cyclone funnel is arranged at the inner side of the washing tower body corresponding to the inner end position of an inlet pipeline. The dust removal mode cannot effectively collect potassium salt products entering a system along with dust, and the characteristic that the potassium salt is easy to salt can also cause the blockage of a high-efficiency filter.

The technical method disclosed in CN 110056350B is similar to a bag-type dust removal process.

In the prior art, a dust removal device for recovering solid particles in tail gas after the potassium salt drying tail gas is treated is not provided, so that the solid content of the tail gas discharged after the potassium salt drying tail gas is treated exceeds the standard, and the environment is polluted.

Disclosure of Invention

The utility model aims to solve the technical problem that, overcome the dry tail gas processing of current potassium salt and go up tail gas emission and contain the solid standard more than standard, a large amount of dust of wet process dust removal get into the liquid and equal problem, provide a dry tail gas dust collector of potassium salt that fresh water utilization is few, dust removal effect is showing.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a dry tail gas dust collector of sylvite, is including installing the cyclone at drying equipment tail fan housing top, cyclone connects gradually sack cleaner and wet dust collector through the tuber pipe, wet dust collector includes scrubbing tower and water circle device, the torrent contact material is filled at the scrubbing tower middle part, is equipped with defogging device in the upper portion cavity, water circle device connects the upper portion cavity and the lower part cavity of scrubbing tower, with the washing liquid cyclic utilization in the scrubbing tower.

Further, the water circulation device comprises a circulation pump and pipelines connected with two ends of the circulation pump, the pipelines comprise an ascending pipeline and a descending pipeline, the ascending pipeline comprises a first branch and a second branch, the first branch extends to the upper cavity of the washing tower, a nozzle is arranged at the tail end of the first branch and is used for spraying turbulence contact type materials, the second branch is connected to an external process, a liquid conductivity detector is arranged at the second branch, when the liquid conductivity reaches a set threshold value, a valve of the second branch is opened, and the washing liquid is conveyed to the drainage pool; the descending pipeline is provided with two outlets in a cavity at the lower part of the washing tower, a first outlet is arranged at the upper end of the cavity at the lower part of the washing tower and is an overflow port, a liquid level sensor is arranged at the height of the overflow port to control the opening and closing of a valve of the first outlet, and washing liquid overflowing from the first outlet is conveyed to the ascending pipeline through a circulating pump to form water circulation; the bottom of scrubbing tower lower part cavity is located to the second export, and this export is for arranging the mouth to the greatest extent for arrange the washing liquid in the scrubbing tower to the greatest extent, just open when needing to get into in the scrubbing tower manual overhaul, the washing liquid that the second export was got rid of at this moment is outer arranging, no longer carries to upper and lower pipeline through the circulating pump.

Furthermore, the defogging device comprises a defogger, a plurality of spray heads for cleaning the defogger, and water pipes for connecting the defogger and the spray heads, wherein the spray heads are arranged on the upper side and the lower side of the defogger, and the water pipes are also connected to the lower cavity of the washing tower in a shunting manner and used for conveying clean water to the lower cavity of the washing tower when the equipment is started initially or the liquid level height of the washing liquid is lower than a set value so as to maintain the liquid level height of the washing.

And further, an induced draft fan is further arranged on an air pipe connecting the bag-type dust collector and the wet dust collector and is controlled by a frequency converter.

Furthermore, the draught fan is a unilateral suction coupling driving centrifugal fan.

Furthermore, the cyclone dust collector is provided with two parallel cyclone dust collectors, and the top and the bottom of the cyclone dust collector are both provided with dust cleaning ports.

Furthermore, the turbulent contact material is made of PP.

The utility model discloses a set up planetary valve and screw conveyer below cyclone and sack cleaner, return to product conveyor belt with the solid granule that contains in the tail gas, be favorable to improving drying system productivity.

The utility model discloses a and through installation wet dust collector behind the sack dust removal, fully moist and dissolve the solid phase in the tail gas, promoted the dust removal effect, compare and can improve fresh water resource utilization ratio with traditional wet dust removal, reduce the production sewage discharge by a wide margin, apparent improvement economic benefits.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: 1. the device comprises a cyclone dust collector, 2. a bag-type dust collector, 3. a wet dust collector, 4. an air pipe, 5. a washing tower, 5-1. the middle part of the washing tower, 5-2. an upper cavity of the washing tower, 5-3. a lower cavity of the washing tower, 6. a water circulating device, 6-1. a circulating pump, 6-2. a pipeline, 6-21. an ascending pipeline, 6-211. a first branch, 6-2111. a nozzle, 6-212. a second branch, 6-22. a descending pipeline, 6-221. a first outlet, 6-222. a second outlet, 7. a turbulent contact material, 8. a demisting device, 8-1. a demister, 8-2. a spray head, 8-3. a water pipe, 8-31. a water pipe shunt, 9. a washing liquid, 10. a stainless steel grating and 11. a draught fan.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Referring to the attached drawing 1, the cyclone dust collector 1 is installed at the top of a tail air cover of a drying device, the cyclone dust collector 1 is sequentially connected with a bag-type dust collector 2 and a wet dust collector 3 through an air pipe 4, the wet dust collector 3 comprises a washing tower 5 and a water circulation device 6, a turbulent flow contact material 7 is filled in the middle 5-1 of the washing tower, a demisting device 8 is arranged in an upper cavity 5-2, and the water circulation device 6 is connected with the upper cavity 5-2 and a lower cavity 5-3 of the washing tower to recycle a washing liquid 9 in the washing tower 5.

The demisting device 8 comprises a demister 8-1, a plurality of spray heads 8-2 for cleaning the demister, and a water pipe 8-3 for connecting the demister 8-1 and the spray heads 8-2, wherein the spray heads 8-2 are arranged on the upper side and the lower side of the demister 8-1, 3 groups of spray heads 8-1 are arranged on each side, 6 groups of spray heads 8-1 are connected in parallel and supply fresh process water through the water pipe 8-3, the spray heads 8-1 are washed once every 15 minutes to avoid salt deposition on the demister 8-1, pressure difference meters are arranged on the upper side and the lower side of the demister 8-1, and the blocking condition of the demister 8-1 can be judged according to the pressure difference. The water pipe 8-3 is also connected to a cavity 5-3 at the lower part of the washing tower in a shunting manner and is used for conveying clean water washing liquid 9 to the cavity 5-3 at the lower part of the washing tower when the equipment is started initially or the liquid level height of the washing liquid 9 is lower than a set value, and maintaining the liquid level height of the washing liquid 9. And a liquid level sensor is arranged at the liquid level height of the set value and can feed back to a valve for controlling the water pipe to split 8-31 in real time. The nozzle material of the spray head 8-2 is 316 stainless steel.

The turbulence contact type material 7 filled in the middle part 5-1 of the washing tower is fixed by stainless steel grids 10 arranged at the upper side and the lower side, the distance between the stainless steel grids is 30cm, and the thickness of the turbulence contact type material is 25 cm.

An induced draft fan 11 is further arranged on an air pipe 4 connecting the bag-type dust collector 2 and the wet dust collector 3, the induced draft fan 11 is a single-side suction coupling driving centrifugal fan, the installed power is 160kW, and the installed power is 316 Ti. The processing capacity is 45000-49500 kg/h, and the air supply temperature is 70-80 ℃. The air inlet of the draught fan 11 is phi 1000mmm, and the air outlet is 2500 multiplied by 1200. The draught fan 11 is provided with an observation port, a water outlet, a support frame, a soft connection of an inlet and an outlet, and a rubber cushion pad. The induced draft fan 11 is controlled by a frequency converter.

The cyclone dust collector 1 is provided with two parallel-connected cyclone dust collectors, and the top and the bottom of the cyclone dust collector are both provided with dust cleaning ports. The cyclone dust collector 1 is a cone with the diameter phi of 1400mmm and the height of 5600 m and is made of 316 Ti.

The water circulation device 6 comprises a circulation pump 6-1 and a pipeline 6-2 connected with two ends of the circulation pump 6-1, the pipeline 6-2 comprises an ascending pipeline 6-21 and a descending pipeline 6-22, the ascending pipeline 6-21 comprises a first branch 6-211 and a second branch 6-212, the first branch 6-211 extends to an upper cavity 5-2 of the washing tower, the tail end of the first branch is provided with a nozzle 6-2111 for spraying the turbulent contact type material 7, the second branch 6-212 is connected to an external drainage pool, a liquid conductivity detector is arranged at the second branch 6-212, when the conductivity of the washing liquid 9 reaches a set threshold value, a valve of the second branch 6-212 is opened, and the washing liquid 9 is conveyed to the drainage pool; the descending pipeline 6-2-ii2 is provided with two outlets in the cavity 5-3 at the lower part of the washing tower, the first outlet 6-221 is arranged at the upper end of the cavity 5-3 at the lower part of the washing tower and is an overflow port, a liquid level sensor is arranged at the height of the overflow port to control the opening and closing of a valve of the first outlet 6-221, and the washing liquid 9 overflowing from the first outlet 6-221 is conveyed to the ascending pipeline 6-21 through a circulating pump 6-1 to form water circulation; the second outlet 6-222 is arranged at the bottom end of the cavity 5-4 at the lower part of the washing tower, and is a draining port for draining the washing liquid 9 in the washing tower, and is opened when needing to enter the washing tower 5 for manual maintenance, and the washing liquid discharged from the second outlet 6-222 is discharged outside and is not conveyed to the ascending pipeline 6-21 through the circulating pump 6-1. Two circulating pumps 6-1 are arranged, one is used, and the other is standby.

The washing tower 5 is a cylindrical structure with the diameter of 3250mm and the height of 9600mm, and is made of glass fiber reinforced plastic GRP. The turbulent contact type material 7 in the washing tower 5 is made of PP, and the turbulent washing tower 5 has many advantages compared with a static washing tower, thereby not only improving the washing efficiency, but also having large treatment capacity on tail gas. Between the packing, the turbulent effect of the liquid greatly reduces the resistance to the transfer of material between the gas and the liquid.

The utility model discloses a concrete working process does: firstly, starting a valve of a water pipe shunt 8-31 in a wet dust collector 3, adjusting the liquid level height of a washing liquid 9 in a cavity 5-3 at the lower part of a washing tower in the wet dust collector 3 to a set value, then enabling dry tail gas to sequentially pass through a cyclone dust collector 1 and a bag-type dust collector 2, separating thicker particles in the dry tail gas, enabling the dry tail gas containing smaller particles with sylvite to enter the cavity 5-3 at the lower part of the washing tower under the action of an induced draft fan 11, enabling a nozzle of a first branch 6-211 of an ascending pipeline in a water circulation device 6 to spray the washing liquid 9, enabling the washing liquid 9 to flow into the cavity 5-3 at the lower part of the washing tower through a turbulence contact type material 7 and to be contacted with the entering sylvite-containing tail gas, wetting and dissolving sylvite particles in the sylvite-containing tail gas with the washing liquid 9, settling solid particles under gravity, enabling the tail, is discharged to the atmosphere through an opening at the top of the scrubber 5.

The washing liquid 9 circulates in the washing tower 5 through the circulating pump 6-1, when the conductivity of the washing liquid 9 reaches a set value, the washing liquid 9 is discharged outside, the water pipe shunt 8-31 and the spray head 8-2 supplement water for the washing tower, the washing liquid is discharged outside a dust removal system through the pipe 6-221 when the liquid level of the cavity 5-3 at the lower part of the washing tower is higher, and the internal liquid is emptied through the pipe 6-222 when the washing tower is cleaned.

The utility model discloses can fully moisten and dissolve the potassium salt granule in the potassium salt tail gas, promote dust removal effect, compare in traditional wet dedusting can effectively reduce the fresh water and use by a wide margin, the improvement that is showing benefit. Adopt the utility model discloses a dust collector removes dust to potassium salt dry tail gas and handles, and it is 30mg/Nm to discharge tail gas, and traditional exhaust emissions is 120 mg/Nm.

Various modifications and variations of the present invention may be made by those skilled in the art, and they are still within the scope of the present invention, provided they are within the scope of the claims and their equivalents.

What is not described in detail in the specification is prior art that is well known to those skilled in the art.

Claims

1. The utility model provides a dry tail gas dust collector of sylvite, is including installing the cyclone at drying equipment tail fan housing top, cyclone connects gradually sack cleaner and wet dust collector through the tuber pipe, its characterized in that: the wet dust collector comprises a washing tower and a water circulating device, wherein turbulent contact type materials are filled in the middle of the washing tower, a demisting device is arranged in an upper cavity, and the water circulating device is connected with the upper cavity and a lower cavity of the washing tower and recycles washing liquid in the washing tower.

2. The potassium salt drying tail gas dust removal device of claim 1, which is characterized in that: the water circulation device comprises a circulation pump and pipelines connected with two ends of the circulation pump, each pipeline comprises an ascending pipeline and a descending pipeline, each ascending pipeline comprises a first branch and a second branch, each first branch extends to the upper cavity of the washing tower, a nozzle is arranged at the tail end of each first branch and is used for spraying turbulence contact type materials, each second branch is connected to a drainage pool, a liquid conductivity detector is arranged at each second branch, when the liquid conductivity reaches a set threshold value, a valve of each second branch is opened, and washing liquid is conveyed to the drainage pool; the lower pipeline is provided with two outlets in a cavity at the lower part of the washing tower, the first outlet is arranged at the upper end of the cavity at the lower part of the washing tower and is an overflow port, and washing liquid overflowing from the first outlet is conveyed to the upper pipeline through a circulating pump to form water circulation; the second outlet is arranged at the bottom end of the cavity at the lower part of the washing tower, and the outlet is a draining port for draining the washing liquid in the washing tower.

3. The potassium salt drying tail gas dust removal device of claim 1 or 2, characterized in that: the demisting device comprises a demister, a plurality of spray heads for cleaning the demister, and water pipes for connecting the demister and the spray heads, wherein the spray heads are arranged on the upper side and the lower side of the demister, and the water pipes are connected to a cavity at the lower part of the washing tower in a shunting manner and used for conveying clean water to the cavity at the lower part of the washing tower when the equipment is started initially or the liquid level height of the washing liquid is lower than a set value so as to maintain the liquid level height of.

4. The potassium salt drying tail gas dust removal device of claim 1 or 2, characterized in that: and an induced draft fan is further arranged on an air pipe connecting the bag-type dust collector and the wet dust collector and is controlled by a frequency converter.

5. The potassium salt drying tail gas dust removal device of claim 4, which is characterized in that: the induced draft fan is a high-pressure centrifugal fan.

6. The potassium salt drying tail gas dust removal device of claim 1 or 2, characterized in that: the cyclone dust collector is provided with two parallel cyclone dust collectors, and the top and the bottom of the cyclone dust collector are both provided with dust cleaning ports.

7. The potassium salt drying tail gas dust removal device of claim 1 or 2, characterized in that: the turbulent contact material is made of PP.