CN212292887U - Salt water evaporation and flue gas sedimentation system - Google Patents
Salt water evaporation and flue gas sedimentation system Download PDFInfo
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- CN212292887U CN212292887U CN202020234858.5U CN202020234858U CN212292887U CN 212292887 U CN212292887 U CN 212292887U CN 202020234858 U CN202020234858 U CN 202020234858U CN 212292887 U CN212292887 U CN 212292887U
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Abstract
The utility model discloses a salt solution evaporation and flue gas sedimentation system, subside the machine including salt solution evaporation and flue gas, salt solution evaporation and flue gas subside machine top-down and include high temperature flue gas chamber, salt solution evaporation chamber and flue gas settling chamber. The upper part of the high-temperature flue gas chamber is provided with a flue gas outlet, a first steam outlet and a flue gas inlet, and the flue gas outlet is connected with an exhaust fan. The brine evaporation chamber comprises a high-temperature flue gas pipeline and a brine bin, and the high-temperature flue gas pipeline is positioned in the brine bin; the upper part of the side wall of the brine bin is provided with a brine inlet, and the bottom of the side wall of the brine bin is provided with a concentrated brine outlet. The flue gas settling chamber comprises a settling separation chamber, an ash collecting hopper and an ash outlet from top to bottom. The utility model discloses cooling to the high temperature flue gas is handled and is designed a salt solution evaporation and flue gas settlement machine, utilizes the waste heat of high temperature flue gas to make the industry salt solution evaporation, has both reached and has reduced the flue gas temperature, gets rid of the purpose of dust in the flue gas, can also evaporate the industry salt to the while and obtain the industry salt crystallization.
Description
Technical Field
The utility model belongs to the technical field of chemical industry danger is useless, concretely relates to salt water evaporation and flue gas sedimentation system.
Background
The steel industry is used as an energy and resource intensive industry, the usage amount of the steel industry is particularly huge, the dust collection ash waste amount of a steel plant accounts for about 3% -5% of the steel yield, at present, the recycling of the dust collection ash of the steel plant mainly utilizes a pyrogenic process, the pyrogenic process treatment of the dust collection ash can generate a large amount of high-temperature dust-containing flue gas in the high-temperature reduction process, for example, after the dust collection ash is treated by a mesh belt type suspension combined reduction furnace and a chain plate type high-temperature reduction furnace, the temperature of the discharged high-temperature dust-containing flue gas can reach about 1000 ℃, and the direct discharge of the high-temperature dust-containing flue gas can not only pollute the environment, but also cause the waste.
At present, the industrial brine is generally treated by natural evaporation in an evaporation pond or crystallization in an evaporation and crystallization system in production, wherein the evaporation pond can pollute the environment, the evaporation and crystallization system usually needs large-scale evaporation equipment, certain energy is wasted, and meanwhile, certain requirements on the equipment are met.
The invention patent CN 105664514B discloses a horizontal MVC evaporator, which comprises a cylinder, a condenser and a raw water inlet, wherein a primary evaporation chamber, a secondary evaporation chamber and a tertiary evaporation chamber are arranged in the cylinder, and the system is operated by adopting an electrically-driven vapor compressor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem among the prior art, the utility model provides a salt solution evaporation and flue gas sedimentation system utilizes the steel plant to deal with the high temperature dusty flue gas of collecting dust ash in-process discharge and evaporates as the heat source to industrial salt solution to realize harmless, resourceful processing high temperature dusty flue gas, eliminate the secondary pollution risk.
In order to achieve the above object, the utility model discloses a following technical scheme realizes:
a brine evaporation and flue gas sedimentation system comprises a brine evaporation and flue gas sedimentation machine, wherein the brine evaporation and flue gas sedimentation machine comprises a high-temperature flue gas chamber, a brine evaporation chamber and a flue gas sedimentation chamber from top to bottom; the upper part of the high-temperature flue gas chamber is provided with a flue gas outlet, a first steam outlet and a flue gas inlet, and the flue gas outlet is connected with an exhaust fan; the brine evaporation chamber comprises a high-temperature flue gas pipeline and a brine bin, and the high-temperature flue gas pipeline is positioned in the brine bin; the upper part of the side wall of the brine bin is provided with a brine inlet, and the bottom of the side wall of the brine bin is provided with a concentrated brine outlet; the flue gas settling chamber comprises a settling separation chamber, an ash collecting hopper and an ash outlet from top to bottom.
Further, still include the crystallizer, crystallizer upper portion is equipped with concentrated salt solution import and vapor inlet, and the middle part is equipped with the overflow mouth, and the lower part is equipped with the crystallization export, concentrated salt solution import links to each other with the concentrated salt solution export through the vapor blast pipe.
The industrial salt crystallization device is characterized by further comprising a disc type low-salt evaporator, wherein a crystallized salt inlet and a second steam outlet are formed in the upper portion of the disc type low-salt evaporator, an industrial salt outlet is formed in the lower portion of the disc type low-salt evaporator, the crystallized salt inlet is connected with the crystallized outlet through a feeding mechanism, and the second steam outlet is connected with the steam inlet through an exhaust fan.
Furthermore, the device also comprises a brine tank which is respectively connected with the brine inlet and the overflow port.
Further, still include the circulating water pond, the circulating water pond links to each other with the condensing tower.
Further, the high-temperature flue gas pipeline is at least two sets of, and every group quantity is 1 at least, and pipeline thickness is 6 ~ 12mm, and the pipeline diameter is 20 ~ 1000cm, the high-temperature flue gas pipeline still is equipped with compressed air for preventing the pipeline deposition and blows stifled mechanism.
Further, the bottom surface of the brine bin is an inclined surface inclined towards the direction of the concentrated brine outlet, the inclination angle of the inclined surface is not less than 1 degree, namely the top plane of the flue gas settling chamber is used as a base surface, the bottom surface of the brine bin is an inclined surface which is low at one side of the concentrated brine inlet and high at the other side far away from the concentrated brine inlet, and the inclination angle is 1-90 degrees and can be 1 degree.
Further, the high-temperature flue gas pipeline is connected with the high-temperature flue gas chamber and the flue gas settling chamber through flanges; the high-temperature flue gas pipeline is connected with the salt water bin through a sleeve, the diameter of the sleeve is 10-20 mm larger than that of the flue gas pipe, and the height of the sleeve is 10-20 cm.
Further, high temperature flue gas room, flue gas settling chamber, first vapor outlet, salt water import, concentrated salt solution export all are equipped with temperature monitor, pressure monitor and flow monitor, material level monitor about being equipped with in the salt water storehouse, temperature monitor, pressure monitor, flow monitor and material level monitor about and link to each other with the computer control system of peripheral hardware respectively.
The utility model has the advantages as follows:
(1) the utility model discloses cooling to the high temperature flue gas is handled and is designed a salt solution evaporation and flue gas settlement machine, utilizes the waste heat of high temperature flue gas to make the industry salt solution evaporation, has both reached and has reduced the flue gas temperature, gets rid of the purpose of dust in the flue gas, can also evaporate the industry salt to the while and obtain the industry salt crystallization.
(2) The utility model discloses through salt solution evaporation and flue gas subside the quick-witted direct high temperature flue gas cooling to about 400 ℃, do not need the external energy, but to the direct evaporation of industry salt solution, retrieve industrial salt, reduced the great boiler equipment of investment, ensure not having the emission of waste water, realize the comprehensive utilization of heat energy.
(3) The utility model discloses the salt water evaporation of preparation subsides quick-witted equipment simple structure with the flue gas, and is small, and area is little, and equipment cost is low.
Drawings
FIG. 1 is a schematic diagram of a brine evaporation and flue gas settling system;
FIG. 2 is a schematic structural view of a brine evaporation chamber and a flue gas settling machine;
FIG. 3 is a top view of the brine evaporation chamber and the flue gas settler;
the above reference numerals:
1. a brine pond; 2. a brine evaporation and flue gas settling machine; 3. a crystallization tank; 4. a steady flow bin; 5. a feeder; 6. a disk low salt evaporator; 7. a condensing tower; 8. a circulating water tank;
21. a high temperature flue gas chamber; 22. a brine evaporation chamber; 23. a flue gas settling chamber;
211. a flue gas outlet; 212. a first water vapor outlet; 213. a flue gas inlet;
221. a high temperature flue gas duct; 222. a brine bin; 223. a brine inlet; 224. a concentrated brine outlet;
231. a settling separation chamber; 232. a dust collecting hopper; 233. an ash outlet;
31. a concentrated brine inlet; 32. a water vapor inlet; 33. an overflow port; 34. a crystallization outlet; 35. a steam exhaust pipe;
61. a crystallized salt inlet; 62. a second water vapor outlet; 63. and (5) industrial salt export.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the present embodiment provides a brine evaporation and flue gas sedimentation system, which includes a brine pond 1, a brine evaporation and flue gas sedimentation machine 2, a crystallization pond 3, a steady flow bin 4, a feeder 5, a disk type low-salt evaporator 6, a condensation tower 7 and a circulating water pond 8.
The brine evaporation and flue gas settling machine comprises a high-temperature flue gas chamber 21, a brine evaporation chamber 22 and a flue gas settling chamber 23 from top to bottom.
The upper part of the high-temperature flue gas chamber 21 is provided with a flue gas outlet 211, a first steam outlet 212 and a flue gas inlet 213, and the flue gas outlet 211 is connected with an exhaust fan.
The brine evaporation chamber 22 comprises a high-temperature flue gas pipeline 221 and a brine bin 222, the high-temperature flue gas pipeline 221 is located in the brine bin 222, a brine inlet 223 is formed in the upper portion of the side wall of the brine bin 222, a concentrated brine outlet 224 is formed in the bottom of the brine bin, the bottom surface of the brine bin 222 is an inclined surface inclined towards the direction of the concentrated brine outlet, the inclination angle of the inclined surface is not smaller than 1 degree, namely the top plane of the flue gas settling chamber is taken as a base surface, the bottom surface of the brine bin is a low inclined surface at one side of the concentrated brine inlet, the inclined surface far away from the high inclined surface at the other side of the concentrated brine inlet is 1-90 degrees, the inclination angle can include 1 degree and preferably ranges from 1 degree to 30 degrees, and in the angle, concentrated brine can. The interior of the brine tank 222 is made of stainless steel materials resistant to brine corrosion by welding.
Preferably, the device also comprises a crystallizing pond 3, wherein the upper part of the crystallizing pond 3 is provided with a concentrated brine inlet 31 and a steam inlet 32, the middle part is provided with an overflow port 33, the lower part is provided with a crystallizing outlet 34, and the concentrated brine inlet 31 is connected with a concentrated brine outlet 224 through a steam exhaust pipe 35.
Preferably, the low-salt evaporator comprises a disc type low-salt evaporator 6, a crystallized salt inlet 61 and a second steam outlet 62 are arranged at the upper part of the disc type low-salt evaporator 6, an industrial salt outlet 63 is arranged at the lower part of the disc type low-salt evaporator 6, the crystallized salt inlet 61 is connected with the crystallized outlet 34 through a steady flow bin 3 and a feeder 4, the second steam outlet 62 is connected with the steam inlet 32 through an exhaust fan, and solid industrial salt discharged from the industrial salt outlet 63 is stored in an industrial salt warehouse through a belt conveyor.
Preferably, a brine tank 1 is further included, wherein the brine tank 1 is connected to the brine inlet 223 and the overflow 33, respectively.
Preferably, a condensation tower 7 is further included, wherein the condensation tower 7 is connected to the concentrated brine inlet 31 through a water vapor vent pipe 35.
Preferably, a circulating water tank 8 is further included, wherein the circulating water tank 8 is connected to the condensing tower 7.
The number of the high-temperature flue gas pipes 221 is at least two, and each group is at least 1, and as a preferred embodiment, the high-temperature flue gas pipes 221 in this embodiment are set to be two groups, and each group is 9. The high-temperature flue gas pipeline 221 is generally made of a stainless steel pipe resistant to salt water corrosion, the thickness of the pipeline is 6-12 mm, the size of the pipeline is designed according to the passing amount of flue gas, the section wind speed is generally designed to be 3-10 m/s, the diameter of the pipeline is 20-1000 cm in order to prevent dust deposition of the pipeline and facilitate heat exchange, a compressed air blowing and blocking mechanism is further arranged for preventing dust deposition of the pipeline, and the high-temperature flue gas pipeline 221 is connected with the high-temperature flue gas chamber 11 and the flue gas settling chamber 13 through flanges; the high-temperature flue gas pipeline 221 is connected with the brine bin 222 through a sleeve, the diameter of the sleeve is 10-20 mm larger than that of the flue gas pipe, the height of the sleeve is 10-20 cm, and a heat insulation material layer and a refractory material layer are arranged in the high-temperature flue gas chamber 21 and the flue gas settling chamber 23 in a conventional mode.
High temperature flue gas chamber 21, flue gas settling chamber 23, first vapor outlet 212, second vapor outlet 62, salt solution import 223, concentrated salt solution export 224 are equipped with temperature monitor, pressure monitor and flow monitor, be equipped with upper and lower material level monitor in the salt solution storehouse 222, temperature monitor, pressure monitor, flow monitor and upper and lower material level monitor link to each other with the computer control system of peripheral hardware respectively.
The working process of the brine evaporation and flue gas sedimentation system is as follows:
high-temperature dust-containing flue gas (about 1000 ℃) enters a high-temperature flue gas pipeline from a flue gas inlet of a high-temperature flue gas chamber, at the moment, industrial brine enters a brine bin from a brine pool through a brine inlet, water is evaporated by heating of the high-temperature flue gas pipeline, and evaporated steam is sent into a disc-type low-salt evaporator to provide heat for the disc-type low-salt evaporator. The cooled dust-containing flue gas enters a bottom flue gas settling chamber, solid-gas separation is generated due to the reduction of the air flow speed, and the solid falls into a bottom ash collecting hopper due to the sedimentation of the gravity, is discharged through an ash outlet and is conveyed into a solid storehouse for storage. The separated flue gas passes through another group of high-temperature flue gas pipelines, and is discharged from a flue gas outlet of a high-temperature flue gas chamber at the top of the other group of high-temperature flue gas pipelines through the action of an exhaust fan after the brine is cooled.
The salt after evaporation concentration in the brine bin sinks to the bottom due to the fact that the specific gravity of the salt is higher than that of the water solution, the salt is discharged from a concentrated brine outlet, the salt enters a crystallizing pond after heat exchange is continued through a steam exhaust pipe, steam is further evaporated due to temperature reduction, a part of the salt is crystallized to form solid and is settled at the bottom of the crystallizing pond, the solid is sent into a steady flow bin through a corrosion-resistant pump and sent into a disc type low-salt evaporator through a feeding machine to be evaporated, the obtained solid is industrial salt, and the industrial salt is sent into an industrial salt bin to be stored after being discharged from the disc type low-.
And the water vapor coming out of the disc type low-salt evaporator is sent into the crystallization tank through the exhaust fan, and is sent into the condensation tower through the water vapor exhaust pipe in the crystallization tank to be condensed into water solution to return to the circulating water tank. The clear liquid at the upper part of the crystallization tank enters the brine tank through an overflow port and then is circulated to enter a brine bin for further evaporation and concentration,
the working principle of the brine evaporation and flue gas sedimentation machine is as follows:
the cold brine is evaporated in the flowing process of the high-temperature flue gas in the pipeline, the temperature of the flue gas is reduced, meanwhile, solid dust in the flue gas is separated, the flowing of the flue gas depends on the suction of an exhaust fan, so that negative pressure operation is formed in the machine, and the concentrated industrial brine is further evaporated through a disc type low-salt evaporator to obtain industrial salt.
The foregoing is a more detailed description of the invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments disclosed herein. To the utility model belongs to the field of the ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. A brine evaporation and flue gas sedimentation system is characterized by comprising a brine evaporation and flue gas sedimentation machine, wherein the brine evaporation and flue gas sedimentation machine comprises a high-temperature flue gas chamber, a brine evaporation chamber and a flue gas sedimentation chamber from top to bottom;
the upper part of the high-temperature flue gas chamber is provided with a flue gas outlet, a first steam outlet and a flue gas inlet, and the flue gas outlet is connected with an exhaust fan;
the brine evaporation chamber comprises a high-temperature flue gas pipeline and a brine bin, and the high-temperature flue gas pipeline is positioned in the brine bin; the upper part of the side wall of the brine bin is provided with a brine inlet, and the bottom of the side wall of the brine bin is provided with a concentrated brine outlet;
the flue gas settling chamber comprises a settling separation chamber, an ash collecting hopper and an ash outlet from top to bottom.
2. The brine evaporation and flue gas sedimentation system according to claim 1, further comprising a crystallization tank, wherein the upper part of the crystallization tank is provided with a concentrated brine inlet and a steam inlet, the middle part of the crystallization tank is provided with an overflow port, the lower part of the crystallization tank is provided with a crystallization outlet, and the concentrated brine inlet is connected with the concentrated brine outlet through a steam exhaust pipe.
3. The brine evaporation and flue gas sedimentation system as claimed in claim 2, further comprising a disk type low salt evaporator, wherein a crystallized salt inlet and a second steam outlet are arranged at the upper part of the disk type low salt evaporator, an industrial salt outlet is arranged at the lower part of the disk type low salt evaporator, the crystallized salt inlet is connected with the crystallized outlet through a feeding mechanism, and the second steam outlet is connected with the steam inlet through an exhaust fan.
4. The brine evaporation and flue gas settling system of claim 2, further comprising a brine pond connected to the brine inlet and the overflow port, respectively.
5. The brine evaporation and flue gas settling system as defined in claim 2, further comprising a condensing tower connected to the concentrated brine inlet by a steam vent line.
6. The brine evaporation and flue gas settling system of claim 5, further comprising a circulating water basin connected to the condensing tower.
7. The brine evaporation and flue gas sedimentation system according to claim 1, wherein the number of the high temperature flue gas pipes is at least two, each group comprises at least 1 pipe, the thickness of the pipe is 6-12 mm, the diameter of the pipe is 20-1000 cm, and the high temperature flue gas pipe is further provided with a compressed air blowing and blocking mechanism for preventing dust deposition on the pipe.
8. The brine evaporation and flue gas sedimentation system according to claim 1, wherein the bottom surface of the brine tank is provided with an inclined surface inclined towards the outlet of the concentrated brine at an angle of not less than 1 °.
9. The brine evaporation and flue gas settling system of claim 1, wherein the high temperature flue gas duct is flanged to the high temperature flue gas chamber and the flue gas settling chamber; the high-temperature flue gas pipeline is connected with the salt water bin through a sleeve, the diameter of the sleeve is 10-20 mm larger than that of the flue gas pipe, and the height of the sleeve is 10-20 cm.
10. The brine evaporation and flue gas sedimentation system according to claim 1, wherein the high temperature flue gas chamber, the flue gas sedimentation chamber, the first steam outlet, the brine inlet, and the concentrated brine outlet are each provided with a temperature monitor, a pressure monitor, and a flow monitor, wherein the brine tank is provided with an upper and lower material level monitor, and the temperature monitor, the pressure monitor, the flow monitor, and the upper and lower material level monitor are respectively connected with a peripheral computer control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020234858.5U CN212292887U (en) | 2020-03-02 | 2020-03-02 | Salt water evaporation and flue gas sedimentation system |
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|---|---|---|---|
| CN202020234858.5U CN212292887U (en) | 2020-03-02 | 2020-03-02 | Salt water evaporation and flue gas sedimentation system |
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| CN212292887U true CN212292887U (en) | 2021-01-05 |
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| CN202020234858.5U Active CN212292887U (en) | 2020-03-02 | 2020-03-02 | Salt water evaporation and flue gas sedimentation system |
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