CN211770781U - Energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system - Google Patents
Energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system Download PDFInfo
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- CN211770781U CN211770781U CN202020207569.6U CN202020207569U CN211770781U CN 211770781 U CN211770781 U CN 211770781U CN 202020207569 U CN202020207569 U CN 202020207569U CN 211770781 U CN211770781 U CN 211770781U
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Abstract
The utility model discloses an energy-conserving zero release low temperature ordinary pressure evaporation crystallization system belongs to high concentration salt solution zero release technical field. Including evaporating chamber, crystallization kettle, evaporation condensation heat exchanger, condensation chamber and refrigeration room unit, utilize the different characteristics that carry the moisture ability difference of air temperature, through the circulation at evaporating chamber and condensation chamber, realize the concentrated crystallization of strong brine and the collection of condensate, realized the high concentration salt solution zero release under the normal atmospheric temperature and pressure and handled. The system has the advantages of reasonable design, high automation degree, low energy consumption, low cost, zero pollutant discharge, high salinity and COD removal efficiency and obvious energy-saving effect, and the strong brine is processed into solid salt and clear water, thereby having good economic benefit, obvious environmental protection advantage and good application prospect.
Description
Technical Field
The utility model belongs to the technical field of the high concentration salt water zero release, concretely relates to energy-conserving zero release low temperature ordinary pressure evaporation crystallization system.
Background
Fresh water is a material basis for human life, and with the development of industrial civilization, the problem of high-concentration brine discharged by seawater desalination and industrial production is increasingly serious, and solution evaporation and concentration are important ways for solving the problem. Traditional solution concentration methods include multi-stage flash evaporation, multi-effect evaporation, reverse osmosis, and the like. A large amount of steam is consumed in the processes of multi-stage flash evaporation and multi-effect evaporation; the reverse osmosis method requires high-quality electric energy consumption, and is complex in operation and maintenance and high in cost. The traditional solution concentration method concentrates the salinity of the solution to more than 6 percent and directly discharges the salinity into the environment, thereby neglecting the influence of the previous high-salinity solution on the ecological environment of the surrounding sea area. Therefore, the traditional solution concentration method has high energy consumption and great pollution, and has important significance in researching and developing a solution concentration process with low energy consumption, low cost and zero pollution emission.
Disclosure of Invention
In order to solve the defect that exists among the above-mentioned prior art, the utility model aims at providing an energy-conserving zero release low temperature ordinary pressure evaporation crystal system, system design is reasonable, has realized the concentrated crystallization of strong brine and the collection of condensate to and the high concentration salt solution zero release under the normal atmospheric temperature and pressure is handled.
The utility model discloses a following technical scheme realizes:
the utility model discloses an energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system, which comprises an evaporation chamber, a crystallization kettle, an evaporative condensation heat exchanger, a condensation chamber and a refrigeration chamber unit;
the top and the lower part of the evaporation chamber and the lower part of the condensation chamber are communicated to form an annular gas circulation channel, a heat insulation interlayer is arranged at the communication position of the top of the evaporation chamber and the top of the condensation chamber, a gas circulation fan is arranged at the communication position of the lower parts of the evaporation chamber and the condensation chamber, an air inlet is formed in the side part of the condensation chamber, the air inlet surface of the gas circulation fan faces the air inlet, and the air outlet surface of the gas circulation fan faces the evaporation chamber;
an inlet of the evaporation chamber is connected with a strong brine feed pump, an evaporation chamber sprayer and evaporation chamber filler are arranged in the evaporation chamber, the evaporation chamber sprayer is arranged above the evaporation chamber filler, a bottom outlet of the evaporation chamber is connected with the crystallization kettle, the crystallization kettle is connected with the strong brine feed pump, a side outlet of the bottom of the evaporation chamber is connected with a hot side of the evaporation and condensation heat exchanger, and the hot side of the evaporation and condensation heat exchanger is connected with the evaporation chamber sprayer;
a condensing chamber sprayer and a condensing chamber filler are arranged in the condensing chamber, the condensing chamber sprayer is arranged above the condensing chamber filler, an outlet at the bottom of the condensing chamber is connected with the hot end of the refrigerating chamber unit, the hot end of the refrigerating chamber unit is connected with the cold side of the evaporation-condensation heat exchanger, the cold side of the evaporation-condensation heat exchanger is connected with a condensing device, the condensing device is connected with the cold end of the refrigerating chamber unit, and the cold end of the refrigerating chamber unit is connected with the condensing chamber sprayer; the outlet at the bottom of the condensing chamber is connected with a condensate discharge pipe.
Preferably, the refrigeration chamber unit comprises a refrigeration chamber hot end heat exchanger, a throttle valve, a refrigeration chamber cold end heat exchanger and a refrigeration chamber compressor which are sequentially connected, a low-boiling-point working medium circulates in the refrigeration chamber hot end heat exchanger, the throttle valve, the refrigeration chamber cold end heat exchanger and the refrigeration chamber compressor, an outlet at the bottom of the condensation chamber is connected with the refrigeration chamber hot end heat exchanger, and the refrigeration chamber hot end heat exchange is connected with the cold side of the evaporation condensation heat exchanger; the condensing device is connected with the cold-end heat exchanger of the refrigerating chamber, and the cold-end heat exchanger of the refrigerating chamber is connected with the sprayer of the condensing chamber.
Preferably, the condensing means is a condensing fan or a cooler.
Preferably, a strong brine discharge pump is arranged on a connecting pipeline between the outlet at the bottom of the evaporation chamber and the crystallization kettle.
Preferably, a strong brine internal circulation pump is arranged on a connecting pipeline between the outlet at the bottom side of the evaporation chamber and the hot side of the evaporation and condensation heat exchanger.
Preferably, a condensate internal circulation pump is arranged on a connecting pipeline between the outlet at the bottom of the condensing chamber and the hot end of the refrigerating chamber unit.
Preferably, a condensate discharge pump is arranged on the condensate discharge pipe.
Preferably, a waste heat utilization heat exchanger is arranged on a connecting pipeline between the hot side of the evaporation condensation heat exchanger and the evaporation chamber sprayer and connected with an external system.
Preferably, the evaporation chamber sprayer and the condensation chamber sprayer are both multi-layered.
Preferably, the cross-sectional area of the lower part of the communication between the evaporation chamber and the condensation chamber is reduced from the condensation chamber to the evaporation chamber.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses an energy-conserving zero release Low temperature ordinary pressure Evaporation Crystallization system, including evaporating chamber, Crystallization kettle, Evaporation condensation heat exchanger, condensing chamber and refrigeration room unit, utilize Low temperature ordinary pressure Evaporation (Low temperature atmospheric pressure Evaporation and Crystallization, LAEC) theory of operation, simulation natural rainfall normal water Evaporation and rainfall circulation. In nature, an air stream with a relative humidity of less than 100% can absorb water but not salt when passing over the ocean, and when the supersaturated air stream is cooled, it will condense out, creating rainfall. The LAEC technique simulates this natural phenomenon in a closed environment, when the gas heats up and absorbs moisture in an evaporation chamber and then condenses to pure water in a condensation chamber. The system utilizes the characteristics of different water carrying capacities of different air temperatures, realizes the concentration and crystallization of the strong brine and the collection of the condensate through the circulation of the evaporation chamber and the condensation chamber, and realizes the zero discharge treatment of the high-concentration brine at normal temperature and normal pressure. The condensate is cooled by an external cold source (a condensing device), so that the maximization of energy efficiency is realized; the effective contact area of gas and liquid is increased by adopting a spraying and filling layer in the evaporation chamber and the condensation chamber, and the mass transfer effect is enhanced; the evaporation chamber and the condensation chamber adopt annular closed circulation shapes, so that the resistance drop of gas circulation is reduced. The system has the advantages of reasonable design, low energy consumption, low cost, zero emission of pollutants, high salinity and COD removal efficiency, obvious energy-saving effect, and obvious environmental protection advantage because the strong brine is processed into solid salt and clear water.
Furthermore, the refrigeration chamber unit realizes heat transfer from low temperature to high temperature by adopting low-boiling point working medium circulation, can achieve good treatment effect under the condition of no external heat source and cold source, and realizes energy conservation and consumption reduction.
Furthermore, the waste heat utilization heat exchanger introduces waste heat of an external system to heat the concentrated solution, residual energy is fully utilized, and energy efficiency maximization is achieved.
Furthermore, the evaporating chamber sprayer and the condensing chamber sprayer are both multilayer, so that the effective gas-liquid contact area is increased, and the mass transfer effect is enhanced.
Drawings
Fig. 1 is the overall structure schematic diagram of the energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system of the utility model.
In the figure: the system comprises a 1-strong brine feeding pump, a 2-evaporation chamber, a 3-strong brine discharge pump, a 4-crystallization kettle, a 5-strong brine internal circulation pump, a 6-evaporation and condensation heat exchanger, a 7-waste heat utilization heat exchanger, an 8-gas circulation fan, a 9-evaporation chamber sprayer, a 10-evaporation chamber filler, an 11-condensate internal circulation pump, a 12-refrigeration chamber hot end heat exchanger, a 13-throttling valve, a 14-refrigeration chamber cold end heat exchanger, a 15-refrigeration chamber compressor, a 16-condensation fan, a 17-condensation chamber sprayer, an 18-condensation chamber filler, a 19-condensation chamber and a 20-condensate discharge pump.
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific examples, which are intended to illustrate and not to limit the invention:
as figure 1, the utility model discloses an energy-conserving zero release low temperature ordinary pressure evaporation crystallization system, including evaporating chamber 2, crystallization kettle 4, evaporation condensation heat exchanger 6, condensation chamber 19 and refrigeration room unit.
The top and the lower part of the evaporation chamber 2 and the condensation chamber 19 are communicated to form an annular gas circulation channel, the top communicated part of the evaporation chamber 2 and the condensation chamber 19 is provided with a heat insulation interlayer, the heat insulation interlayer can adopt a silicate partition plate with a filter membrane, the heat exchange between the system and the outside is reduced, meanwhile, gas and water vapor can pass through the filter membrane, and liquid can not pass through the filter membrane. The lower part intercommunication department of evaporating chamber 2 and condensing chamber 19 is equipped with gas circulation fan 8, and the lower part intercommunication department sectional area of evaporating chamber 2 and condensing chamber 19 is by condensing chamber 19 to 2 convergent of evaporating chamber, and air inlet has been seted up to the 19 lateral parts of condensing chamber, and gas circulation fan 8's air inlet face is towards air inlet, and the air-out face is towards evaporating chamber 2.
An inlet of the evaporation chamber 2 is connected with a strong brine feed pump 1, an evaporation chamber sprayer 9 and an evaporation chamber filler 10 are arranged in the evaporation chamber 2, the evaporation chamber sprayer 9 is arranged above the evaporation chamber filler 10, the evaporation chamber sprayers 9 can be arranged in multiple layers, an outlet at the bottom of the evaporation chamber 2 is connected with the crystallization kettle 4, and a connecting pipeline between the outlet at the bottom of the evaporation chamber 2 and the crystallization kettle 4 is provided with a strong brine discharge pump 3; crystallization kettle 4 is connected with strong brine charge pump 1, 2 bottom side outlets of evaporating chamber are connected with the hot side of evaporation condensation heat exchanger 6, be equipped with strong brine internal circulation pump 5 on the connecting pipeline between 2 bottom side outlets of evaporating chamber and the hot side of evaporation condensation heat exchanger 6, the hot side of evaporation condensation heat exchanger 6 is connected with evaporating chamber spray thrower 9, can set up waste heat utilization heat exchanger 7 on the connecting pipeline between the hot side of evaporation condensation heat exchanger 6 and evaporating chamber spray thrower 9, waste heat utilization heat exchanger 7 and external system connection, the waste heat induction system with external system.
A condensing chamber sprayer 17 and a condensing chamber filler 18 are arranged in the condensing chamber 19, the condensing chamber sprayer 17 is arranged above the condensing chamber filler 18, the condensing chamber sprayer 17 can be arranged in multiple layers, the refrigerating chamber unit comprises a refrigerating chamber hot end heat exchanger 12, a throttle valve 13, a refrigerating chamber cold end heat exchanger 14 and a refrigerating chamber compressor 15 which are sequentially connected, a low-boiling-point working medium circulates in the refrigerating chamber hot end heat exchanger 12, the throttle valve 13, the refrigerating chamber cold end heat exchanger 14 and the refrigerating chamber compressor 15, an outlet at the bottom of the condensing chamber 19 is connected with the refrigerating chamber hot end heat exchanger 12, a condensate internal circulating pump 11 is arranged on a connecting pipeline between the outlet at the bottom of the condensing chamber 19 and the refrigerating chamber hot end heat exchanger 12, and the refrigerating chamber hot end heat exchanger 12 is connected; the condensing device 16 is connected with the cold-end heat exchanger 14 of the refrigerating chamber, and the cold-end heat exchanger 14 of the refrigerating chamber is connected with the sprayer 17 of the condensing chamber; the cold side of the evaporative condensation heat exchanger 6 is connected with a condensing device 16, the condensing device 16 can adopt a condensing fan or a cooler, the condensing device 16 is connected with the cold end of the refrigeration chamber unit, and the cold end of the refrigeration chamber unit is connected with a condensing chamber sprayer 17; the outlet at the bottom side of the condensing chamber 19 is connected with a condensate discharging pipe, and a condensate discharging pump 20 is arranged on the condensate discharging pipe.
The working method of the energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system comprises the following steps:
the concentrated brine enters the evaporation chamber 2 through the concentrated brine feed pump 1, the concentrated solution at the bottom of the evaporation chamber 2 enters the hot side of the evaporation and condensation heat exchanger 6 through the concentrated brine internal circulating pump 5, exchanges heat with the condensed solution with higher temperature at the cold side of the evaporation and condensation heat exchanger 6 to form high-temperature concentrated solution, the high-temperature concentrated solution is heated continuously after being absorbed by the waste heat utilization heat exchanger 7, the high-temperature concentrated solution is sprayed down from the sprayer 9 of the evaporation chamber, and is cooled and returned to the bottom of the evaporation chamber 2 after being reversely contacted with the air fed from the gas circulating fan 8 in the filling 10 area of the evaporation chamber, the water in the concentrated solution is absorbed by the heated air in the contact process; the concentrated solution at the bottom of the evaporation chamber 2 can continuously accumulate salinity and gradually approaches to the crystallization saturation concentration; the bottom concentrated solution enters a crystallization kettle 4 from the bottom outlet of an evaporation chamber 2 through a strong brine discharge pump 3 to realize solid-liquid separation to obtain solid salt, and the turbid solution of the crystallization kettle 4 returns to a strong brine feed pump 1 to be circulated;
hot air with moisture enters the condensing chamber 19 through an air inlet, is in contact with the spray liquid of the sprayer 17 of the condensing chamber in the same direction in the region of the filler 18 of the condensing chamber for cooling, and the moisture of the air is condensed into condensate liquid in the cooling process and falls down; after the air is cooled, the air is sent into the evaporation chamber 2 through a gas circulating fan 8; the condensate accumulates at the bottom of a condensing chamber 19, the condensate passes through a condensate internal circulation pump 11 from the outlet at the bottom of the condensing chamber 19, a refrigerating chamber hot end heat exchanger 12 exchanges heat with a low-boiling-point working medium (a common refrigerant can be selected) which is compressed by a refrigerating chamber compressor 15 to do work and raise the temperature, the heated condensate exchanges heat with a concentrated solution in an evaporation and condensation heat exchanger 6 and then is cooled, the cooled condensate further lowers the temperature through a condensing device 16, then exchanges heat in the cold end of a refrigerating chamber unit and is cooled again, and then the low-temperature condensate enters a condensing chamber sprayer 17; the accumulated condensate is taken as clean water produced by the system and is sent out of the system by a condensate discharge pipe through a condensate discharge pump 20;
air enters the condensing chamber 19 from an air inlet under the action of the suction force of the gas circulating fan 8, maintains the micro-positive pressure state of the system, and circulates in an annular gas circulating channel formed by the evaporating chamber 2 and the condensing chamber 19.
It should be noted that the above description is only a part of the embodiments of the present invention, and equivalent changes made by the system described in the present invention are all included in the protection scope of the present invention. The technical field of the present invention can be replaced by other embodiments described in a similar manner, without departing from the structure of the present invention or exceeding the scope defined by the claims, which belong to the protection scope of the present invention.
Claims (10)
1. An energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system is characterized by comprising an evaporation chamber (2), a crystallization kettle (4), an evaporative condensation heat exchanger (6), a condensation chamber (19) and a refrigeration chamber unit;
the top and the lower part of the evaporation chamber (2) and the condensation chamber (19) are communicated to form an annular gas circulation channel, a heat insulation interlayer is arranged at the communication position of the top of the evaporation chamber (2) and the top of the condensation chamber (19), a gas circulation fan (8) is arranged at the communication position of the lower part of the evaporation chamber (2) and the lower part of the condensation chamber (19), an air inlet is formed in the side part of the condensation chamber (19), the air inlet surface of the gas circulation fan (8) faces the air inlet, and the air outlet surface faces the evaporation chamber (2);
an inlet of the evaporation chamber (2) is connected with a strong brine feed pump (1), an evaporation chamber sprayer (9) and an evaporation chamber filler (10) are arranged in the evaporation chamber (2), the evaporation chamber sprayer (9) is arranged above the evaporation chamber filler (10), an outlet at the bottom of the evaporation chamber (2) is connected with the crystallization kettle (4), the crystallization kettle (4) is connected with the strong brine feed pump (1), an outlet at the side of the bottom of the evaporation chamber (2) is connected with a hot side of the evaporation and condensation heat exchanger (6), and the hot side of the evaporation and condensation heat exchanger (6) is connected with the evaporation chamber sprayer (9);
a condensing chamber sprayer (17) and a condensing chamber filler (18) are arranged in the condensing chamber (19), the condensing chamber sprayer (17) is arranged above the condensing chamber filler (18), an outlet at the bottom of the condensing chamber (19) is connected with a hot end of the refrigerating chamber unit, the hot end of the refrigerating chamber unit is connected with a cold side of the evaporative condensation heat exchanger (6), the cold side of the evaporative condensation heat exchanger (6) is connected with a condensing device (16), the condensing device (16) is connected with a cold end of the refrigerating chamber unit, and the cold end of the refrigerating chamber unit is connected with the condensing chamber sprayer (17); the outlet at the bottom side of the condensing chamber (19) is connected with a condensate discharging pipe.
2. The energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system as claimed in claim 1, wherein the refrigeration chamber unit comprises a refrigeration chamber hot end heat exchanger (12), a throttle valve (13), a refrigeration chamber cold end heat exchanger (14) and a refrigeration chamber compressor (15) which are connected in sequence, low-boiling-point working media circulate in the refrigeration chamber hot end heat exchanger (12), the throttle valve (13), the refrigeration chamber cold end heat exchanger (14) and the refrigeration chamber compressor (15), an outlet at the bottom of the condensation chamber (19) is connected with the refrigeration chamber hot end heat exchanger (12), and the refrigeration chamber hot end heat exchanger (12) is connected with the cold side of the evaporative condensation heat exchanger (6); the condensing device (16) is connected with the cold-end heat exchanger (14) of the refrigerating chamber, and the cold-end heat exchanger (14) of the refrigerating chamber is connected with the spray thrower (17) of the condensing chamber.
3. The energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system as claimed in claim 1, wherein the condensing device (16) is a condensing fan or a cooler.
4. The energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system as claimed in claim 1, wherein a strong brine discharge pump (3) is arranged on a connecting pipeline between the bottom outlet of the evaporation chamber (2) and the crystallization kettle (4).
5. The energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system as claimed in claim 1, wherein a connection pipeline between the outlet on the bottom side of the evaporation chamber (2) and the hot side of the evaporative condensation heat exchanger (6) is provided with a concentrated brine internal circulation pump (5).
6. The energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system as claimed in claim 1, wherein a condensate internal circulation pump (11) is arranged on a connecting pipeline between the outlet at the bottom of the condensing chamber (19) and the hot end of the refrigerating chamber unit.
7. The energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system as claimed in claim 1, wherein a condensate discharge pipe is provided with a condensate discharge pump (20).
8. The energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system as claimed in claim 1, wherein a waste heat utilization heat exchanger (7) is arranged on a connecting pipeline between the hot side of the evaporative condensation heat exchanger (6) and the evaporation chamber sprayer (9), and the waste heat utilization heat exchanger (7) is connected with an external system.
9. The energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system as claimed in claim 1, wherein the evaporation chamber sprayer (9) and the condensation chamber sprayer (17) are both multi-layered.
10. The energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system as claimed in claim 1, wherein the cross-sectional area of the lower communication part of the evaporation chamber (2) and the condensation chamber (19) is reduced from the condensation chamber (19) to the evaporation chamber (2).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111153543A (en) * | 2020-02-25 | 2020-05-15 | 中国华能集团清洁能源技术研究院有限公司 | Energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111153543A (en) * | 2020-02-25 | 2020-05-15 | 中国华能集团清洁能源技术研究院有限公司 | Energy-saving zero-emission low-temperature normal-pressure evaporative crystallization system and working method thereof |
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