CN211004597U - Continuous quality-separating crystallization and purification device for potassium chloride and sodium chloride in mixed salt wastewater - Google Patents
Continuous quality-separating crystallization and purification device for potassium chloride and sodium chloride in mixed salt wastewater Download PDFInfo
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- CN211004597U CN211004597U CN201921749368.2U CN201921749368U CN211004597U CN 211004597 U CN211004597 U CN 211004597U CN 201921749368 U CN201921749368 U CN 201921749368U CN 211004597 U CN211004597 U CN 211004597U
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Abstract
A continuous quality-grading crystallization purification device for potassium chloride and sodium chloride in industrial mixed salt wastewater relates to the technical field of crystallization, separation and purification of salt in the industrial mixed salt wastewater, and particularly relates to a continuous quality-grading crystallization purification device for potassium chloride and sodium chloride in the industrial mixed salt wastewater. The device comprises a feeding pump, a first heater, a separation chamber, a first circulating pump, a crystallization kettle, a first centrifuge, a first mother liquid tank, a first mother liquid pump, a second heater, a crystallizer, a second circulating pump, a second centrifuge, a second mother liquid tank, a second mother liquid pump, a condenser, a vacuum pump and a heat exchanger. After the technical scheme is adopted, the utility model discloses beneficial effect does: the shell and tube forced circulation evaporator has good heat exchange effect, large flow and low crystallization blockage failure rate; the first step of the process is vacuum evaporation, temperature reduction and crystallization, and under the condition of ensuring slow temperature reduction of salt, potassium chloride is extracted; and in the second step, vacuum evaporation crystallization is adopted, sodium chloride is extracted, and the crystallization sequence is good according to the salt characteristics.
Description
Technical Field
The utility model relates to a crystallization separation purification salt technical field in the industry mixed salt waste water, concretely relates to continuous branch matter crystallization purification device of potassium chloride and sodium chloride in the mixed salt waste water.
Background
The existing continuous quality-divided crystallization purification of potassium chloride and sodium chloride in industrial mixed salt wastewater adopts an evaporative crystallization technology, feed liquid is concentrated by primary heating and then concentrated by secondary heating, the concentration is gradually concentrated, the equipment is complex, the maintenance cost is high, the concentration of residual salt in the operation wastewater is high, and the treatment is not thorough.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a continuous quality-grading crystallization and purification device of potassium chloride and sodium chloride in mixed salt wastewater, aiming at the defects and shortcomings of the prior art, and the device adopts a shell and tube forced circulation evaporator, has good heat exchange effect, large flow and low crystallization blockage failure rate; the first step of the process is vacuum evaporation, temperature reduction and crystallization, and under the condition of ensuring slow temperature reduction of salt, potassium chloride is extracted; and in the second step, vacuum evaporation crystallization is adopted, sodium chloride is extracted, and the crystallization sequence is good according to the salt characteristics.
In order to achieve the above purpose, the utility model adopts the following technical scheme: it comprises a feeding pump 1, a first heater 2, a separation chamber 3, a first circulating pump 4, a crystallization kettle 5, a first centrifuge 6, a first mother liquor tank 7, a first mother liquor pump 8, a second heater 9, a crystallizer 10, a second circulating pump 11, a second centrifuge 12, a second mother liquor tank 13, a second mother liquor pump 14, a condenser 15, a vacuum pump 16 and a heat exchanger 17, wherein the feeding pump 1 is connected with the heat exchanger 17, the heat exchanger 17 is connected with the first heater 2, the first heater 2 is connected with the separation chamber 3, the separation chamber 3 is connected with the first circulating pump 4, the first circulating pump 4 is connected with the first heater 2, the separation chamber 3 is connected with the crystallization kettle 5, the crystallization kettle 5 is connected with the first mother liquor tank 7, the first mother liquor tank 7 is connected with the first mother liquor pump 8, the first mother liquor pump 8 is connected with the second heater 9, the second heater 9 is connected with the crystallizer 10, second heater 9 is connected with first heater 2, crystallizer 10 is connected with second circulating pump 11, second circulating pump 11 is connected with second heater 9, crystallizer 10 is connected with second centrifuge 12, second centrifuge 12 is connected with second mother liquor groove 13, second mother liquor groove 13 is connected with second mother liquor pump 14, second mother liquor groove 13 is connected with second centrifuge 12, condenser 15 is connected with heat exchanger 17, separation chamber 3, crystallization kettle 5, crystallizer 10 are connected with condenser 15.
The first centrifuge 6 is a product A discharge port.
The second heater 9 is connected with the heat exchanger 17 through the first heater 2.
The second centrifuge 12 is a product A discharge port.
The utility model discloses a theory of operation: the process adopts a steam heating continuous crystallization process, wherein the salt in the raw material water mainly comprises potassium chloride and sodium chloride, the raw material for heat exchange with condensed water in the evaporation process of the feed liquid firstly adopts a forced circulation heat exchange mode, and then the potassium chloride is further cooled to 104 ℃ in a crystallization kettle for crystallization; secondly, evaporating, forcibly circulating, concentrating and crystallizing, and crystallizing sodium chloride at the temperature of 100 ℃; the mother liquor separated by the system returns to the evaporation device respectively, and is subjected to vacuum concentration crystallization, two solute crystals of one raw material adopt a large-flow axial-flow pump, the device is efficient, energy-saving, large-particle crystallization and equipment non-scabbing, the heat exchange efficiency of the equipment is high, the separation effect is obvious, and the two-step evaporation operation is simple, convenient, rapid and strong in practicability.
After the technical scheme is adopted, the utility model discloses beneficial effect does: it has the following advantages:
1. the shell and tube forced circulation evaporator is adopted, the heat exchange effect is good, the flow is large, and the crystallization blockage failure rate is low;
2. the first step of the process is vacuum evaporation, temperature reduction and crystallization, and under the condition of ensuring slow temperature reduction of salt, potassium chloride is extracted; secondly, vacuum evaporation crystallization is adopted, sodium chloride is extracted, and the crystallization sequence is good according to the salt characteristics;
3. the following considerations are made in the aspect of process design, which are specifically shown as follows:
① crystallizing equipment, namely polishing the pipeline, and adopting a large pipeline, a straight pipeline and a large curvature radius to reduce elbows;
② the design of the small crystallization pipeline fully considers the steam purging to prevent the blockage of the pipeline;
③ crystallizing equipment for polishing the inner wall to prevent the crystal from scabbing;
④ designing unique process route and index according to the characteristics of the materials;
⑤ the flow rate of the solid-containing fluid in the pipeline is designed to be appropriate;
⑥ mother liquor after the centrifuge is clear in turbidity and can be recycled, and the production continuity is strong;
⑦ the heat of the steam condensate is utilized, and the energy conservation and consumption reduction are obvious.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: the system comprises a feeding pump 1, a first heater 2, a separation chamber 3, a first circulating pump 4, a crystallization kettle 5, a first centrifuge 6, a first mother liquid tank 7, a first mother liquid pump 8, a second heater 9, a crystallizer 10, a second circulating pump 11, a second centrifuge 12, a second mother liquid tank 13, a second mother liquid pump 14, a condenser 15, a vacuum pump 16 and a heat exchanger 17.
Detailed Description
Referring to fig. 1, the technical solution adopted in the present embodiment is that it comprises a feeding pump 1, a first heater 2, a separation chamber 3, a first circulating pump 4, a crystallization kettle 5, a first centrifuge 6, a first mother liquid tank 7, a first mother liquid pump 8, a second heater 9, a crystallizer 10, a second circulating pump 11, a second centrifuge 12, a second mother liquid tank 13, a second mother liquid pump 14, a condenser 15, a vacuum pump 16, and a heat exchanger 17, wherein the feeding pump 1 is connected with the heat exchanger 17, the heat exchanger 17 is connected with the first heater 2, the first heater 2 is connected with the separation chamber 3, the separation chamber 3 is connected with the first circulating pump 4, the first circulating pump 4 is connected with the first heater 2, the separation chamber 3 is connected with the crystallization kettle 5, the crystallization kettle 5 is connected with the first mother liquid tank 7, the first mother liquid tank 7 is connected with the first mother liquid pump 8, the first mother liquid pump 8 is connected with the second heater 9, the second heater 9 is connected with the crystallizer 10, the second heater 9 is connected with the first heater 2, the crystallizer 10 is connected with the second circulating pump 11, the second circulating pump 11 is connected with the second heater 9, the crystallizer 10 is connected with the second centrifuge 12, the second centrifuge 12 is connected with the second mother liquid tank 13, the second mother liquid tank 14 is connected with the second mother liquid pump 14, the second mother liquid tank 14 is connected with the second centrifuge 12, the condenser 15 is connected with the heat exchanger 17, the separation chamber 3, the crystallization kettle 5 and the crystallizer 10 are connected with the condenser 15, the raw material liquid is pressurized by the feeding pump 1, sequentially heated by the heat exchanger 17 and the first heater 2, enters the separation chamber 3, the material in the separation chamber 3 enters the first circulating pump 4, returns to the separation chamber 3 through the first heater 2 for material circulating heating, the material containing crystal at the lower part of the separation chamber 3 automatically flows into the crystallization kettle 5 by the potential difference, and then the mixture enters a centrifugal machine 6, a product A potassium chloride is obtained through centrifugation, a centrifugal mother liquid enters a first mother liquid tank 7, the centrifugal mother liquid is subjected to pressure lifting by a first mother liquid pump 8, the temperature of the centrifugal mother liquid is raised by a second heater 9, the centrifugal mother liquid enters a crystallizer 10, materials in the crystallizer 10 enter a second circulating pump 11, the materials in the crystallizer 10 are subjected to circulating heating by the second heater 9, crystal-containing materials at the lower part of the crystallizer 10 enter a second centrifugal machine 12, sodium chloride is obtained through centrifugation, a centrifugal mother liquid enters a second mother liquid tank 13, the centrifugal mother liquid is subjected to pressure lifting by a second mother liquid pump 14 and then is sent to an outlet separation chamber 3 of a charge pump 1, a crystallization kettle 5 and upper gas of the crystallizer 10 to enter a condenser 15, the condensed gas enters a vacuum pump 16, a tail gas of the vacuum pump 16 is sent to a recovery system for cleaning and evacuation, and condensed water.
The utility model discloses a theory of operation: the process adopts a steam heating continuous crystallization process, wherein the salt in the raw material water mainly comprises potassium chloride and sodium chloride, the raw material for heat exchange with condensed water in the evaporation process of the feed liquid firstly adopts a forced circulation heat exchange mode, and then the potassium chloride is further cooled to 104 ℃ in a crystallization kettle for crystallization; secondly, evaporating, forcibly circulating, concentrating and crystallizing, and crystallizing sodium chloride at the temperature of 100 ℃; the mother liquor separated by the system returns to the evaporation device respectively, and is subjected to vacuum concentration crystallization, two solute crystals of one raw material adopt a large-flow axial-flow pump, the device is efficient, energy-saving, large-particle crystallization and equipment non-scabbing, the heat exchange efficiency of the equipment is high, the separation effect is obvious, and the two-step evaporation operation is simple, convenient, rapid and strong in practicability.
After the technical scheme is adopted, the utility model discloses beneficial effect does:
the above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. The utility model provides a continuous branch matter crystallization purification device of potassium chloride and sodium chloride in industry mixed salt waste water which characterized in that: it comprises a feeding pump (1), a first heater (2), a separation chamber (3), a first circulating pump (4), a crystallization kettle (5), a first centrifugal machine (6), a first mother liquor tank (7), a first mother liquor pump (8), a second heater (9), a crystallizer (10), a second circulating pump (11), a second centrifugal machine (12), a second mother liquor tank (13), a second mother liquor pump (14), a condenser (15), a vacuum pump (16) and a heat exchanger (17), wherein the feeding pump (1) is connected with the heat exchanger (17), the heat exchanger (17) is connected with the first heater (2), the first heater (2) is connected with the separation chamber (3), the separation chamber (3) is connected with the first circulating pump (4), the first circulating pump (4) is connected with the first heater (2), the separation chamber (3) is connected with the crystallization kettle (5), and the crystallization kettle (5) is connected with the first mother liquor tank (7), first mother liquor groove (7) is connected with first mother liquor pump (8), first mother liquor pump (8) is connected with second heater (9), second heater (9) are connected with crystallizer (10), second heater (9) are connected with first heater (2), crystallizer (10) are connected with second circulating pump (11), second circulating pump (11) are connected with second heater (9), crystallizer (10) are connected with second centrifuge (12), second centrifuge (12) are connected with second mother liquor groove (13), second mother liquor groove (13) are connected with second mother liquor pump (14), second mother liquor groove (13) are connected with second centrifuge (12), condenser (15) are connected with heat exchanger (17), separating chamber (3), crystallization kettle (5), crystallizer (10) are connected with condenser (15).
2. The continuous quality-separating crystallization purification device for potassium chloride and sodium chloride in industrial mixed salt wastewater as claimed in claim 1, characterized in that: the first centrifuge (6) is a product A discharge hole.
3. The continuous quality-separating crystallization purification device for potassium chloride and sodium chloride in industrial mixed salt wastewater as claimed in claim 1, characterized in that: the second heater (9) is connected with the heat exchanger (17) through the first heater (2).
4. The continuous quality-separating crystallization purification device for potassium chloride and sodium chloride in industrial mixed salt wastewater as claimed in claim 1, characterized in that: the second centrifugal machine (12) is a product A discharging port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921749368.2U CN211004597U (en) | 2019-10-18 | 2019-10-18 | Continuous quality-separating crystallization and purification device for potassium chloride and sodium chloride in mixed salt wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921749368.2U CN211004597U (en) | 2019-10-18 | 2019-10-18 | Continuous quality-separating crystallization and purification device for potassium chloride and sodium chloride in mixed salt wastewater |
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| Publication Number | Publication Date |
|---|---|
| CN211004597U true CN211004597U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921749368.2U Active CN211004597U (en) | 2019-10-18 | 2019-10-18 | Continuous quality-separating crystallization and purification device for potassium chloride and sodium chloride in mixed salt wastewater |
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| CN (1) | CN211004597U (en) |
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2019
- 2019-10-18 CN CN201921749368.2U patent/CN211004597U/en active Active
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