CN213680898U - Industrial waste acid environmental protection recovery processing device - Google Patents
Industrial waste acid environmental protection recovery processing device Download PDFInfo
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- CN213680898U CN213680898U CN202022506962.8U CN202022506962U CN213680898U CN 213680898 U CN213680898 U CN 213680898U CN 202022506962 U CN202022506962 U CN 202022506962U CN 213680898 U CN213680898 U CN 213680898U
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- waste acid
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- 238000011084 recovery Methods 0.000 title claims abstract description 118
- 239000002253 acid Substances 0.000 title claims abstract description 49
- 239000002440 industrial waste Substances 0.000 title claims abstract description 13
- 230000007613 environmental effect Effects 0.000 title claims description 6
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 238000009833 condensation Methods 0.000 claims abstract description 20
- 230000005494 condensation Effects 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000004321 preservation Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000004064 recycling Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000004964 aerogel Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 79
- 239000002699 waste material Substances 0.000 abstract description 33
- 229910000041 hydrogen chloride Inorganic materials 0.000 abstract description 24
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 abstract description 24
- 238000004821 distillation Methods 0.000 abstract description 9
- 239000007789 gas Substances 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 description 18
- 239000000243 solution Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000005068 transpiration Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model belongs to the technical field of waste acid recovery, in particular to an industrial waste acid environment-friendly recovery treatment device, which comprises a concentration tank, a heat exchange condensation mechanism, a recovery storage mechanism, a return pipe and a vacuum pump, wherein the concentration tank comprises an inner tank body, an outer tank body, a jacket, a heat preservation layer, a covered edge, a speed reducing motor, a thermometer, a feed valve, a pressure release valve, a pressure gauge, a gas phase valve and a stirring anchor, the heat exchange condensation mechanism comprises a first condenser and a second condenser, the second condenser is connected with a first recovery tank and a second recovery tank through a three-way valve, the top ends of the first recovery tank and the second recovery tank are both connected with a vent valve and a vacuum valve through a three-way pipe, the vacuum valve is connected with the vacuum pump through the return pipe, the concentration tank can carry out negative pressure distillation on waste acid, and carry out twice condensation recovery on transpired hydrogen chloride and vapor through the heat, the recovery efficiency of waste acid is ensured, and the overflow of hydrochloric acid can be reduced by the return pipe.
Description
Technical Field
The utility model belongs to the technical field of waste acid recovery, concretely relates to industry waste acid environmental protection recovery processing device.
Background
The process of removing scale and rust from the surface of steel using an acid solution is known as pickling. Is a method for cleaning metal surfaces.
The acid for pickling is sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, chromic acid, hydrofluoric acid, mixed acid, or the like. The most common is sulfuric acid and hydrochloric acid, and the hydrochloric acid has strong dissolving capacity to metal oxides at normal temperature and is slowly dissolved to metal matrixes such as steel, so that over-corrosion and severe hydrogen embrittlement are not easy to occur when the hydrochloric acid is used for removing rust, the surface residues of the workpiece after rust removal are fewer, the quality is higher, and the rust removing capacity of the hydrochloric acid is almost in direct proportion to the concentration of the hydrochloric acid.
When dilute hydrochloric acid is used for rust removal, a large amount of waste acid liquid containing 2FeCl3 is generated, the discharge amount of the waste liquid in China is remarkable, about 55-72 kg of pickling waste liquid can be generated in each ton of steel products, the steel industry becomes a large consumer for water at present, and the waste liquid generates a large consumer at the same time, according to statistics of relevant departments, the amount of waste water discharged per year by key steel enterprises is more than 30 hundred million cubic meters, and for the treatment of the waste liquid, an acid-alkali neutralization method is mainly adopted, but the method needs to consume a large amount of alkaline solution, so that technical personnel in the field provide an environment-friendly industrial waste acid recycling device to solve the problems in the background technology.
SUMMERY OF THE UTILITY MODEL
To solve the problems set forth in the background art described above. The utility model provides an industry spent acid environmental protection recovery processing device, concentrated jar can carry out the negative pressure distillation to the spent acid to carry out twice condensation through heat transfer condensation mechanism to the hydrogen chloride and the vapor of transpiration and retrieve, effectively guarantee the rate of recovery of hydrogen chloride, retrieve the recovery and store the mechanism and can carry out alternate storage to the recovery hydrochloric acid of condensation, guarantee the recovery efficiency of spent acid, the back flow can reduce the ease loss volume of hydrochloric acid.
In order to achieve the above object, the utility model provides a following technical scheme: an environment-friendly recycling device for industrial waste acid comprises a concentration tank, a heat exchange condensation mechanism, a recycling storage mechanism, a backflow pipe and a vacuum pump, wherein the concentration tank comprises an inner tank body, the outer side of the inner tank body is fixedly connected with an outer tank body, a jacket is arranged between the inner tank body and the outer tank body, the outer side of the outer tank body is bonded and coated with a heat preservation layer, the outer side of the heat preservation layer is fixedly coated with a covered edge, the bottom of the inner tank body and the bottom of the outer tank body are fixedly provided with a tank bottom valve, the top of the inner tank body is fixedly provided with a speed reduction motor, a thermometer, a pipeline fixedly connected with a feed valve, a pressure relief valve, a pressure gauge and a gas phase valve, an output shaft of the speed reduction motor is fixedly connected with a stirring anchor, the heat exchange condensation mechanism comprises a first condenser and a second condenser, the gas phase, the discharge gate of second condenser passes through three-way valve fixed connection recovery jar one and recovery jar two, the equal fixedly connected with baiting valve in bottom of recovery jar one and recovery jar two, the top of recovery jar one and recovery jar two is all through three-way pipe fixedly connected with discharge valve and vacuum valve, the bottom of vacuum valve fixed connection back flow, the extraction opening of the top fixed connection vacuum pump of back flow.
Preferably, the stirring anchor is a frame type stirrer with a hinge fixedly arranged on a main rotating shaft; when the stirring anchor rotates, the heat conduction efficiency of waste acid in the inner tank body can be increased, the temperature rising speed of the waste acid is increased, and the recovery efficiency is increased.
Preferably, the upper side of the jacket is fixedly connected with a water outlet, the lower side of the jacket is fixedly connected with a water inlet, the jacket is connected with a heat medium system through the water inlet and the water outlet, the heat preservation layer can be one of rock wool and aerogel felt, and the edge cover is riveted and fixed on the heat preservation layer in a unilateral mode through a blind rivet; the heat medium can get into to press from both sides and to the inner tank body in the cover and heat, makes the interior waste acid solution of splendid attire of inner tank body be heated the evaporation and then retrieve, and the heat preservation can provide good thermal-insulated heat preservation effect.
Preferably, the bottom end of the thermometer is inserted into the inner tank body in a penetrating manner, and the pressure gauge is fixedly arranged on a pipeline connecting the inner tank body and the gas phase valve; an operator can monitor the temperature and the negative pressure value in the inner tank body through a thermometer and a pressure gauge to ensure the control of the process level.
Preferably, the vacuum pump is a roots reciprocating vacuum unit, and an air inlet of the vacuum pump is sequentially connected with a return pipe, a recovery storage mechanism, a heat exchange condensation mechanism and a concentration tank in a penetrating manner through pipelines; when the vacuum pump is started, a negative pressure distillation environment can be provided for the concentration tank, and the consumption of steam is reduced by reducing the boiling point of waste acid.
Preferably, the first condenser and the second condenser are both spiral tube type heat exchangers, the first condenser is fixedly connected with a cold water pipeline with the temperature of 0-10 ℃, the second condenser is fixedly connected with a refrigerant pipeline with the temperature of-10-0 ℃, and the second condenser is arranged vertically below the first condenser; the first condenser can retrieve most hydrogen chloride and vapor through, and get into the second condenser after a small amount of hydrogen chloride that can not retrieve because of heat exchange efficiency and vapor's temperature reduces, carry out the secondary condensation and retrieve, effectively guaranteed the rate of recovery of hydrogen chloride.
Preferably, the first recovery tank and the second recovery tank are PP storage tanks with the same structure, liquid level meters are fixedly mounted on the side surfaces of the first recovery tank and the second recovery tank, the liquid level meters are glass tube liquid level meters, and the first recovery tank and the second recovery tank are both arranged below the second condenser; the valve way direction of accessible switching three-way valve when retrieving the hydrochloric acid that stores in the recovery jar one of operating personnel makes the condensation retrieve in the hydrochloric acid flows into the recovery jar two of opposite side, also can cut the valve way of three-way valve to the direction of recovery jar one when retrieving the hydrochloric acid in the recovery jar two with the same principle to make the negative pressure environment in the concentrated jar in the whole negative pressure distillation process can not receive the influence of retrieving storage mechanism, and then guarantee the recovery efficiency of spent acid, also reduced the probability of dashing the material.
Preferably, the return pipe comprises a pipe body, an inclined plate and a triangular plate, the two ends of the pipe body are conical pipes, the middle part of the pipe body is a square pipe structure, and the inclined plate and the triangular plate are fixedly installed inside the square pipe structure in the middle of the pipe body at equal sequence and interval; the trace hydrogen chloride stored in the first recovery tank and the second recovery tank which are pumped away by the vacuum pump during the work can be liquefied and condensed when contacting the surfaces of the inclined plate and the triangular plate when passing through the return pipe, and fall back into the first recovery tank or the second recovery tank under the action of gravity, so that the escape amount of the hydrochloric acid is reduced.
Compared with the prior art, the beneficial effects of the utility model are that: when the stirring anchor rotates, the heat conduction efficiency of waste acid in the inner tank body can be improved, the temperature rise speed of the waste acid is increased, and the recovery efficiency is improved; a heating medium can enter the jacket to heat the inner tank body, so that waste acid solution contained in the inner tank body is heated and evaporated to be recovered, and the heat-insulating layer can provide a good heat-insulating effect; an operator can monitor the temperature and the negative pressure value in the inner tank body through a thermometer and a pressure gauge to ensure the control of the process level; when the vacuum pump is started, a negative pressure distillation environment can be provided for the concentration tank, and the consumption of steam is reduced by reducing the boiling point of waste acid; the first condenser can recover most of the hydrogen chloride and the water vapor which pass through the first condenser, and a small amount of hydrogen chloride and water vapor which cannot be recovered due to the heat exchange efficiency enter the second condenser after the temperature of the hydrogen chloride and the water vapor is reduced, so that secondary condensation recovery is carried out, and the recovery rate of the hydrogen chloride is effectively ensured; an operator can switch the direction of the valve path of the three-way valve when recovering the hydrochloric acid stored in the first recovery tank to make the condensed and recovered hydrochloric acid flow into the second recovery tank on the other side, and similarly, the valve path of the three-way valve can be switched to the direction of the first recovery tank when recovering the hydrochloric acid in the second recovery tank, so that the negative pressure environment in the concentration tank cannot be influenced by the recovery and storage mechanism in the whole negative pressure distillation process, the recovery efficiency of the waste acid is further ensured, and the probability of material flushing is also reduced; the trace hydrogen chloride stored in the first recovery tank and the second recovery tank which are pumped away by the vacuum pump during the work can be liquefied and condensed when contacting the surfaces of the inclined plate and the triangular plate when passing through the return pipe, and fall back into the first recovery tank or the second recovery tank under the action of gravity, so that the escape amount of the hydrochloric acid is reduced.
The parts of the device not involved are the same as or can be implemented using prior art.
Drawings
The accompanying drawings 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 and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of A of the present invention;
FIG. 3 is a schematic cross-sectional view of the middle return pipe according to the present invention;
in the figure: 1. a concentration tank; 2. a heat exchange condensing mechanism; 3. a recovery storage mechanism; 4. a return pipe; 5. a vacuum pump; 101. an inner tank body; 102. an outer tank body; 103. a jacket; 104. a heat-insulating layer; 105. edge covering; 106. a reduction motor; 107. a feed valve; 108. a thermometer; 109. a pressure relief valve; 110. a pressure gauge; 111. stirring and anchoring; 112. a tank bottom valve; 113. a gas phase valve; 1031. a water inlet; 1032. a water outlet; 201. a first condenser; 202. a second condenser; 301. a three-way valve; 302. a first recovery tank; 303. a second recovery tank; 304. a liquid level meter; 305. a discharge valve; 306. an exhaust valve; 307. a vacuum valve; 308. a three-way pipe; 401. a pipe body; 402. a sloping plate; 403. a triangular plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-3, the present invention provides the following technical solutions: the utility model provides an industry spent acid environmental protection recovery processing apparatus, includes concentrated jar 1, heat transfer condensation mechanism 2, retrieves and stores mechanism 3, back flow 4, vacuum pump 5, concentrated jar 1 includes inner tank body 101, inner tank body 101's the outside fixedly connected with outer jar body 102, be equipped with between inner tank body 101 and the outer jar body 102 and press from both sides cover 103, the outside bonding cladding of outer jar body 102 has heat preservation 104, the outside fixed cladding of heat preservation 104 has bordure 105, inner tank body 101, outer jar body 102's bottom fixed mounting have tank bottoms valve 112, inner tank body 101's top fixed mounting has gear motor 106, thermometer 108 and fixed connection feed valve 107, relief valve 109, manometer 110, gas phase valve 113's pipeline, gear motor 106's output shaft fixedly connected with stirring anchor 111, heat transfer condensation mechanism 2 includes first condenser 201 and second condenser 202, the gas phase valve 113 is connected with the feed inlet of the first condenser 201 through a pipeline fixedly, the discharge outlet of the first condenser 201 is connected with the feed inlet of the second condenser 202 fixedly, the discharge outlet of the second condenser 202 is connected with the first recovery tank 302 and the second recovery tank 303 through a three-way valve 301 fixedly, the bottom ends of the first recovery tank 302 and the second recovery tank 303 are fixedly connected with a discharge valve 305, the top ends of the first recovery tank 302 and the second recovery tank 303 are fixedly connected with an exhaust valve 306 and a vacuum valve 307 through a three-way pipe 308, the vacuum valve 307 is fixedly connected with the bottom end of the return pipe 4, and the top end of the return pipe 4 is fixedly connected with an air suction opening of the vacuum pump 5.
Specifically, the stirring anchor 111 is a frame-type stirrer with a hinge fixedly mounted on a main rotating shaft; when the stirring anchor 111 rotates, the heat conduction efficiency of waste acid in the inner tank body 101 can be improved, the temperature rising speed of the waste acid is increased, and the recovery efficiency is improved.
Specifically, the upper side of the jacket 103 is fixedly connected with a water outlet 1032, the lower side of the jacket 103 is fixedly connected with a water inlet 1031, the jacket 103 is connected with a heat medium system through the water inlet 1031 and the water outlet 1032, the heat insulation layer 104 can be rock wool or aerogel felt, and the covered edge 105 is riveted and fixed on the heat insulation layer 104 in a single-sided manner through a blind rivet; heating medium can enter the jacket 103 and heat the inner tank body 101, so that waste acid solution contained in the inner tank body 101 is heated and evaporated to be recovered, and the heat-insulating layer 104 can provide a good heat-insulating effect.
Specifically, the bottom end of the thermometer 108 is inserted into the inner tank 101, and the pressure gauge 110 is fixedly installed on a pipeline connecting the inner tank 101 and the gas valve 113; an operator can monitor the temperature and the negative pressure value in the inner tank 101 through a temperature gauge 108 and a pressure gauge 110 to ensure the control of the process level.
Specifically, the vacuum pump 5 is a roots reciprocating vacuum unit, and an air inlet of the vacuum pump 5 is sequentially communicated with a return pipe 4, a recovery storage mechanism 3, a heat exchange condensation mechanism 2 and a concentration tank 1 through pipelines; the vacuum pump 5 can provide a negative pressure distillation environment for the concentration tank 1 when being started, and the consumption of steam is reduced by reducing the boiling point of waste acid.
Specifically, the first condenser 201 and the second condenser 202 are both spiral tube heat exchangers, the first condenser 201 is fixedly connected with a cold water pipeline with the temperature of 0 ℃ to 10 ℃, the second condenser 202 is fixedly connected with a refrigerant pipeline with the temperature of-10 ℃ to 0 ℃, and the second condenser 202 is arranged vertically below the first condenser 201; the first condenser 201 can recover most of the passing hydrogen chloride and water vapor, and a small amount of hydrogen chloride and water vapor which cannot be recovered due to the heat exchange efficiency enter the second condenser 202 after the temperature is reduced, so that secondary condensation recovery is carried out, and the recovery rate of the hydrogen chloride is effectively ensured.
Specifically, the first recovery tank 302 and the second recovery tank 303 are PP storage tanks with the same structure, liquid level meters 304 are fixedly mounted on the side surfaces of the first recovery tank 302 and the second recovery tank 303, the liquid level meters 304 are glass tube liquid level meters, and the first recovery tank 302 and the second recovery tank 303 are both arranged below the second condenser 202; the valve path direction of the three-way valve 301 can be switched by an operator when hydrochloric acid stored in the first recovery tank 302 is recovered, the condensed and recovered hydrochloric acid flows into the second recovery tank 303 on the other side, and the valve path of the three-way valve 301 can be switched to the direction of the first recovery tank 302 in the same way when the hydrochloric acid in the second recovery tank 303 is recovered, so that the negative pressure environment in the concentration tank 1 in the whole negative pressure distillation process cannot be influenced by the recovery storage mechanism 3, the recovery efficiency of the waste acid is further ensured, and the probability of material flushing is also reduced.
Specifically, the return pipe 4 includes a pipe body 401, an inclined plate 402 and a triangular plate 403, the pipe body 401 is a structure in which two ends are tapered pipes and a middle part is a square pipe, and the inclined plate 402 and the triangular plate 403 are fixedly installed inside the square pipe structure in the middle of the pipe body 401 at equal intervals; when the trace hydrogen chloride stored in the first recovery tank 302 and the second recovery tank 303 pumped away by the vacuum pump 5 passes through the return pipe 4, the trace hydrogen chloride can be liquefied and condensed when contacting the surfaces of the inclined plate 402 and the triangular plate 403, and falls back into the first recovery tank 302 or the second recovery tank 303 under the action of gravity, so that the escape amount of the hydrochloric acid is reduced.
The utility model discloses a theory of operation and use flow: when the device is used for waste acid recovery, an operator firstly starts the vacuum pump 5, sequentially opens the vacuum valves 307 on the first recovery tank 302 or the second recovery tank 303, controls the valve core of the three-way valve 301 to rotate, so that the feed opening of the second condenser 202 is communicated with the interior of the first recovery tank 302 or the second recovery tank 303 which opens the vacuum valve 307, then opens the gas-phase valve 113, observes the pressure gauge 110, opens the feed valve 107 after the vacuum value in the inner tank 101 measured by the pressure gauge 110 is stable, so that waste acid solution stored in other storage tanks is pumped into the inner tank 101, before opening the valves, the operator should pay attention to close all other valves in the device to avoid the stop of the vacuum pump 5 or the waste liquid from entering other pipelines, and when waste acid in the inner tank 101 is injected into a proper volume, the operator closes the feed valve 107;
then, an operator opens a cold water pipeline and a cold medium pipeline connected with the first condenser 201 and the second condenser 202, opens the water inlet 1031 and the water outlet 1032, so that a heat medium heated to a temperature required by the process enters the jacket 103, and opens the speed reduction motor 106, so that the stirring anchor 111 rotates to stir the waste acid solution in the inner tank 101, and the waste acid solution in the inner tank 101 is rapidly heated;
under the negative pressure environment, the waste acid solution in the inner tank body 101 quickly reaches the boiling point, the hydrogen chloride and the water vapor which are vaporized into gas are dispersed into the first condenser 201, most of the hydrogen chloride and the water vapor are condensed and liquefied in the first condenser 201 and fall into the second condenser 202 under the action of gravity, a small amount of hydrogen chloride and water vapor which cannot be effectively recovered due to heat exchange efficiency continuously enter the second condenser 202 after the temperature of the hydrogen chloride and the water vapor is reduced, secondary condensation recovery is carried out in the second condenser 202, and the recovery rate of the hydrogen chloride is effectively ensured; the hydrochloric acid solution in the second condenser 202 falls into the first recovery tank 302 or the second recovery tank 303 along the three-way valve 301 under the action of gravity and is stored, trace hydrogen chloride stored in the first recovery tank 302 and the second recovery tank 303 pumped away by the vacuum pump 5 during operation can be liquefied and condensed when contacting the surfaces of the inclined plate 402 and the triangular plate 403 when passing through the return pipe 4, and falls back into the first recovery tank 302 or the second recovery tank 303 under the action of gravity, so that the escape amount of the hydrochloric acid is reduced
When an operator observes the liquid level in the first recovery tank 302 through the liquid level meter 304 and recovers the hydrochloric acid stored in the first recovery tank 302, the condensed and recovered hydrochloric acid can flow into the second recovery tank 303 on the other side by switching the valve path direction of the three-way valve 301, then the exhaust valve 306 and the discharge valve 305 on the first recovery tank 302 are opened to discharge and recover the hydrochloric acid in the second recovery tank 303, and the hydrochloric acid in the second recovery tank 303 can be recovered, so that the negative pressure environment in the concentration tank 1 in the whole negative pressure distillation process cannot be influenced by the recovery and storage mechanism 3, the recovery efficiency of waste acid is further ensured, and the probability of material flushing is also reduced; when the liquid level in the first recovery tank 302 or the second recovery tank 303 does not change for a long time, an operator can discharge the waste liquid with a very small content of hydrogen chloride in the inner tank body 101, and add new acid liquid for recovery.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an industrial waste acid environmental protection recovery processing device which characterized in that: the device comprises a concentration tank (1), a heat exchange condensation mechanism (2), a recovery storage mechanism (3), a return pipe (4) and a vacuum pump (5), wherein the concentration tank (1) comprises an inner tank body (101), an outer tank body (102) is fixedly connected to the outer side of the inner tank body (101), a jacket (103) is arranged between the inner tank body (101) and the outer tank body (102), a heat preservation layer (104) is bonded and coated on the outer side of the outer tank body (102), a wrapping edge (105) is fixedly coated on the outer side of the heat preservation layer (104), a tank bottom valve (112) is fixedly mounted at the bottoms of the inner tank body (101) and the outer tank body (102), a speed reducing motor (106), a thermometer (108) and a pipeline fixedly connected with a feeding valve (107), a pressure release valve (109), a pressure gauge (110) and a gas phase valve (113) are fixedly mounted at the top of the inner tank body (, the heat exchange condensation mechanism (2) comprises a first condenser (201) and a second condenser (202), the gas phase valve (113) is fixedly connected with a feed inlet of the first condenser (201) through a pipeline, the discharge hole of the first condenser (201) is fixedly connected with the feed hole of the second condenser (202), a discharge hole of the second condenser (202) is fixedly connected with a first recovery tank (302) and a second recovery tank (303) through a three-way valve (301), the bottom ends of the first recovery tank (302) and the second recovery tank (303) are fixedly connected with a discharge valve (305), the top ends of the first recovery tank (302) and the second recovery tank (303) are fixedly connected with an exhaust valve (306) and a vacuum valve (307) through a three-way pipe (308), the vacuum valve (307) is fixedly connected with the bottom end of the return pipe (4), and the top end of the return pipe (4) is fixedly connected with an air suction opening of the vacuum pump (5).
2. The environment-friendly recycling device for industrial waste acid as claimed in claim 1, wherein: the stirring anchor (111) is a frame type stirrer with a hinge fixedly arranged on a main rotating shaft.
3. The environment-friendly recycling device for industrial waste acid as claimed in claim 1, wherein: the heat-insulating layer is characterized in that a water outlet (1032) is fixedly connected to the upper side of the jacket (103), a water inlet (1031) is fixedly connected to the lower side of the jacket (103), the jacket (103) is connected with a heat medium system through the water inlet (1031) and the water outlet (1032), the heat-insulating layer (104) can be rock wool or aerogel felt, and the covered edge (105) is riveted and fixed to the heat-insulating layer (104) in a single-sided mode through a rivet.
4. The environment-friendly recycling device for industrial waste acid as claimed in claim 1, wherein: the bottom end of the thermometer (108) is inserted into the inner tank body (101) in a penetrating manner, and the pressure gauge (110) is fixedly arranged on a pipeline connecting the inner tank body (101) and the gas phase valve (113).
5. The environment-friendly recycling device for industrial waste acid as claimed in claim 1, wherein: the vacuum pump (5) is a Roots reciprocating vacuum unit, and an air inlet of the vacuum pump (5) is sequentially connected with the backflow pipe (4), the recovery storage mechanism (3), the heat exchange condensation mechanism (2) and the concentration tank (1) in a penetrating manner through pipelines.
6. The environment-friendly recycling device for industrial waste acid as claimed in claim 1, wherein: the first condenser (201) and the second condenser (202) are both spiral tube type heat exchangers, the first condenser (201) is fixedly connected with a cold water pipeline with the temperature of 0-10 ℃, the second condenser (202) is fixedly connected with a refrigerant pipeline with the temperature of-10-0 ℃, and the second condenser (202) is arranged vertically below the first condenser (201).
7. The environment-friendly recycling device for industrial waste acid as claimed in claim 1, wherein: retrieve jar one (302) and retrieve jar two (303) and be the PP storage tank that the structure is the same, the equal fixed mounting in side of retrieving jar one (302) and retrieving jar two (303) has level gauge (304), level gauge (304) are the glass pipe level gauge, retrieve jar one (302) and retrieve jar two (303) and all set up the below at second condenser (202).
8. The environment-friendly recycling device for industrial waste acid as claimed in claim 1, wherein: the backflow pipe (4) comprises a pipe body (401), an inclined plate (402) and a triangular plate (403), the pipe body (401) is of a structure with two conical pipes at two ends and a square pipe at the middle part, and the inclined plate (402) and the triangular plate (403) are fixedly installed inside the square pipe structure in the middle of the pipe body (401) at regular intervals.
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| CN202022506962.8U CN213680898U (en) | 2020-11-03 | 2020-11-03 | Industrial waste acid environmental protection recovery processing device |
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| CN202022506962.8U CN213680898U (en) | 2020-11-03 | 2020-11-03 | Industrial waste acid environmental protection recovery processing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114031140A (en) * | 2021-11-24 | 2022-02-11 | 南昌工程学院 | Circulating type rare earth wastewater comprehensive treatment system |
| CN114832418A (en) * | 2022-06-09 | 2022-08-02 | 上海傲班科技有限公司 | Purification method and purification equipment for organic solvent |
-
2020
- 2020-11-03 CN CN202022506962.8U patent/CN213680898U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114031140A (en) * | 2021-11-24 | 2022-02-11 | 南昌工程学院 | Circulating type rare earth wastewater comprehensive treatment system |
| CN114832418A (en) * | 2022-06-09 | 2022-08-02 | 上海傲班科技有限公司 | Purification method and purification equipment for organic solvent |
| CN114832418B (en) * | 2022-06-09 | 2024-04-26 | 上海傲班科技有限公司 | Purification method and purification equipment for organic solvent |
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