CN116036622A - Brine gradient heating extraction device - Google Patents
Brine gradient heating extraction device Download PDFInfo
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- CN116036622A CN116036622A CN202310324808.4A CN202310324808A CN116036622A CN 116036622 A CN116036622 A CN 116036622A CN 202310324808 A CN202310324808 A CN 202310324808A CN 116036622 A CN116036622 A CN 116036622A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0029—Use of radiation
- B01D1/0035—Solar energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0041—Use of fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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Abstract
The invention discloses a brine step heating extraction device, which connects a solar heating module with a heat storage module; the heat pump module is connected with a liquid storage tank in the brine circulation module, a spraying device is arranged in the liquid storage tank, a brine pipeline is arranged in the liquid storage tank and is connected with the heat storage module, and the liquid storage tank is connected to the inside of the heat storage module through the pipeline and then used for guiding brine into the spraying device; the system is also connected with a waste heat recovery module and a condensation system. After the modules are connected in the system, solar energy and a high-temperature air source heat pump are adopted to evaporate and condense brine, the energy is utilized in a cascade mode, the preheating is subjected to cascade heat recovery, the effect of evaporating and condensing the brine can be improved, the energy can be fully utilized, and the energy utilization rate is improved.
Description
Technical Field
The invention relates to the technical field of lithium extraction from salt lake brine, and discloses an evaporation and condensation device for gradient heating and gradient waste heat recovery of lithium carbonate salt lake brine.
Background
Lithium resources in nature are mainly reserved in granite crystal rock type ore beds, salt lake brine, seawater and geothermal water. The traditional method for extracting lithium salt from the salt lake is mainly a solar salt method, and the evaporation precipitation method is the most traditional lithium carbonate preparation method and is suitable for the salt lake with low magnesium-lithium ratio; according to the geographical climate condition of the salt lake, the evaporation and precipitation method utilizes the sun-drying evaporation of a large-area salt pan to generate concentrated brine, and then lithium carbonate precipitation and refining processing is carried out.
However, the evaporation and precipitation method adopted at present needs a larger sunning field, and the sunning and evaporation technology is extremely dependent on climate, has larger alkali consumption, long crystallization period, low grade and open-air treatment, causes complicated operation steps due to interference of external factors, has unstable product output and low efficiency, is easily influenced by climate conditions such as rainy season and the like, and cannot meet the requirement of industrial production.
Disclosure of Invention
The invention aims to provide an evaporation and condensation device for gradient heating and waste heat recovery of salt lake brine, which solves the problems that the existing process of generating concentrated brine by utilizing sun-drying evaporation of a large-area salt field depends on weather, and has the advantages of larger alkali consumption, long crystallization period, low grade, instability, low efficiency, easiness in being influenced by weather conditions such as rainy season and the like, and cannot meet industrial production, so that the processing process of the concentrated brine is not influenced by weather, the production efficiency is improved by utilizing clean energy such as solar energy, air source heat pump and the like, and the requirement of industrial production is met.
The scheme of the invention is expressed as follows: the brine gradient heating and extracting device comprises a solar heating module, a heat storage module, a brine circulation module and a heat pump module, wherein the solar heating module is connected with the heat storage module; the heat pump module is connected with a liquid storage tank in the brine circulation module, a spraying device is arranged in the liquid storage tank, a steam pipe is arranged in the liquid storage tank and is connected with the heat storage module, and the liquid storage tank is connected to the inside of the heat storage module through a pipeline and then used for guiding brine into the spraying device.
The heat storage module comprises a double-layer cavity, wherein the inner-layer cavity is a heat exchange cavity, the outer layer is a preheating cavity, and a heat storage medium is arranged in the heat exchange cavity.
The liquid pipeline is arranged in the heat exchange cavity in a spiral pipe structure.
The solar heating module comprises a heat collecting module, and the heat collecting module is connected with the preheating cavity through a hot air pipeline to realize preheating.
The hot air pipeline is provided with a waste heat recovery module, the inlet of the waste heat recovery module is respectively connected with a heat exchange cavity and a preheating cavity on the heat storage module through pipelines, and the outlet of the waste heat recovery module is respectively externally discharged and connected with the solar heating module to realize hot air circulation.
The waste heat recovery module is also connected with a condensation heat exchange device, and the condensation heat exchange device is connected with an evaporator in the heat pump module through a condensation pipeline to realize evaporation heat exchange; the condensing heat exchange device is also connected with the water storage device.
The liquid storage tank is connected with the circulating brine tank through a pipeline, and the circulating brine tank is connected with the circulating pipeline through a circulating pump to guide brine into the spraying device.
The heat collecting module comprises a supporting heat absorbing plate body, wherein a heat collecting and exchanging pipe is arranged in the supporting heat absorbing plate body, and an inlet end and an outlet end are arranged on the heat collecting and exchanging pipe and are connected with the outside.
The beneficial effects of the invention are as follows: the invention discloses an evaporation and condensation device for gradient heating and gradient waste heat recovery of brine, which connects a solar heating module with a heat storage module; the heat pump module is connected with a liquid storage tank in the brine circulation module, a spraying device is arranged in the liquid storage tank, a brine pipeline is arranged in the liquid storage tank and is connected with the heat storage module, and the liquid storage tank is connected to the inside of the heat storage module through the pipeline and then used for guiding brine into the spraying device; the system is also connected with a waste heat recovery module and a condensation system. After the modules are connected in the system, solar energy and a high-temperature air source heat pump are adopted to evaporate and condense brine, the energy is utilized in a cascade mode, the preheating is subjected to cascade heat recovery, the effect of evaporating and condensing the brine can be improved, the energy can be fully utilized, and the energy utilization rate is improved.
The system ensures that the processing process of concentrated brine is not influenced by weather, utilizes clean energy sources such as solar energy, an air source heat pump and the like to improve the production efficiency, meets the requirement of industrialized production, and simultaneously sets a phase-change energy storage material in the heat storage module to ensure that the phase-change energy storage material has a phase-change heat storage function, so that on one hand, the heat supply dispersibility and instability of a solar energy system, which are influenced by illumination, can be improved, the stability of the system can be improved under the condition of fully utilizing resources, on the other hand, the waste heat is stored, the heat loss in the waste heat recovery process is reduced, the collected heat can be transferred into a production system again, and the high-efficiency operation of the system is further promoted.
Drawings
FIG. 1 is a schematic diagram of a system architecture of the present invention;
FIG. 2 is a schematic view of a heat storage module according to the present invention;
FIG. 3 is a schematic diagram of a liquid storage tank according to the present invention;
FIG. 4 is a schematic view of a heat collecting module according to the present invention;
in the figure, 1, a solar heating module, 11, a first temperature sensor, 12, a booster fan, 13, an air pipe, 2, a heat storage module, 21, a preheating cavity, 22, a phase change material, 23, a heat exchange cavity, 24, an insulating layer, 25, a solar air supply outlet, 26, a heat exchange air return outlet, 27, a circulating air return outlet, 28, a impurity removing opening, 3, a brine circulation module, 31, a spraying opening, 32, a steam outlet, 33, a brine outlet, 34, a liquid storage tank, 35, a tank body insulating layer, 36, an insulating movable top cover, 4, a heat pump module, 41, an air guide channel, 42, a guide plate, 43, an evaporator, 44 and a condenser, 45, a second temperature sensor, 5, a waste heat recovery module, 51, a waste heat recovery port I, 52, an outer exhaust port, 53, a circulating air inlet, 54, a circulating air outlet, 55, a condensing port, 6, a condensing recovery module, 61, a liquid discharging port, 62, a condensing heat exchanger, 7, a circulating brine tank, 71, a circulating pump, 72, a brine pipe, 73, a spiral pipe, 74, a steam inlet, 75, a steam pipe, 76, a steam booster fan, 8, a heat collecting module, 81, a heat collecting heat exchange pipe, 82, an outlet end, 83, an inlet end, 84, a supporting heat absorbing plate body, 9, a condensing pipeline, 91 and a condensing pipe booster pump.
Detailed Description
The following describes in further detail the specific embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The present invention is described in detail by the following disclosed connection structure and embodiments: the utility model provides a brine step heating extraction element, it includes solar energy heating module 1, heat-retaining module 2, brine circulation module 3, heat pump module 4, the connection structure of above each module is as follows:
the solar heating module 1 is connected with the heat storage module 2; the solar heating module 1 comprises an annular air pipe 13, a booster fan 12 is arranged on the air pipe 13, the air pipe 13 is used for supporting a heat collecting module 8 through a frame structure, the heat collecting module 8 is arranged in a plate type structure, a supporting heat absorbing plate 84 is arranged on the positive surface of the heat collecting module, a heat collecting and exchanging pipe 81 is arranged in the supporting heat absorbing plate 84, and an outlet end 82 and an inlet end 83 are arranged on the heat collecting and exchanging pipe 81.
Further, the air duct 13 of the solar heating module 1 is provided with a waste heat recovery module 5, as shown in fig. 1, the waste heat recovery module 5 includes a waste heat recovery port i 51, an outer exhaust port 52, a circulating air inlet 53, a circulating air outlet 54, and a condensation port 55, which is connected between the air duct 13 and the heat storage module 2 as a waste heat recovery device, so as to realize heat recovery in the heat storage module 2 and avoid waste of energy, and the specific connection and working principle thereof are as follows:
the connection structure of the solar heating module 1 and the heat storage module 2 is as shown in fig. 1 and 2, the heat storage module 2 is of a double-layer cavity design, the outermost layer of the heat storage module 2 is a heat preservation layer 24, a preheating cavity 21 is arranged in the heat preservation layer 24, a heat exchange cavity 23 is arranged in the preheating cavity 21, a heat storage device formed by a plurality of phase change materials 22 is vertically arranged in the heat exchange cavity 23, a spiral pipe 73 is further arranged around the plurality of phase change materials 22, and two ends of the spiral pipe 73 extend out of the heat storage module 2 respectively. The outer wall of the heat storage module 2 is provided with a solar air supply outlet 25, a heat exchange air return outlet 26, a circulating air return outlet 27, a impurity removal outlet 28 and a steam inlet 74; the solar air supply outlet 25 is connected with the solar heating module 1, and the heat exchange air return outlet 26 is discharged to the outside; the solar air supply opening 25 is connected with the air supply side of the air pipe 13 of the solar heating module 1, the heat exchange cavity 23 is connected with the waste heat recovery opening I51 through the heat exchange air return opening 26, and the circulating air return opening 27 is connected with the circulating air inlet 53. In the waste heat recovery module 5, waste heat recovery mouth I51 is connected with outer air exit 52, can discharge low temperature gas through outer air exit 52. The circulating air inlet 53 is connected with the circulating air outlet 54, and can realize the circulating air supply of the solar heating module 1 to the air pipe 13 and the preheating cavity 21 under the action of the booster fan 12.
The heat pump module 4 adopts a ground source heat pump, the heat supply temperature of which is not lower than 120 ℃, and has the wind speed variable frequency regulation function; a deflector 42 is arranged on the side wall of the air guide channel 41 on the heat pump module 4, and the deflector 42 promotes airflow to flow into the brine circulation module 3. A second temperature sensor 45 is also provided in the air guide passage 41.
The heat pump module 4 is connected with the liquid storage tank 34 in the brine circulation module 3, the top inside the liquid storage tank 34 is provided with a spray opening 31, the middle part of the liquid storage tank is provided with a steam outlet 32, the steam outlet 32 is connected with the heat storage module 2 through a steam pipe 75, and the steam pipe 75 is also provided with a steam booster fan 76 to improve the steam guiding effect. The bottom of the liquid storage tank 34 is provided with a brine outlet 33 in a circular arc shape or funnel structure, high-concentration brine is guided into the circulating brine tank 7 through the brine outlet 33 by a brine pipe 72, the brine is guided into the spiral pipe 73 by a circulating pump 71 on the circulating brine tank 7 for cooling and heat removal, and then is guided into the liquid storage tank 34 through a spraying port 31 to realize recirculation.
After the above connection structure is determined, the working principle of the technical scheme is described as follows:
example 1: gradient heating brine concentration process
First-stage heating: in the working state of the solar heating module 1, the solar heating module provides heat to the preheating cavity 21 in the heat storage module 2 for preheating, so as to provide preheating for the heat storage module 2 and be used for maintaining or giving the initial temperature of the halogen liquid in the spiral pipe 73, and in the process, if the solar heating module 1 is in sufficient sunlight, the surplus heat can be stored through the phase change material 22;
second-stage heating: while the solar heating module 1 is running, the heat pump module 4 working at high temperature provides hot air at the temperature of not lower than 120 ℃, and the sprayed brine is heated for the second time, so that water is evaporated in a steam form through the steam outlet 32, the thicker brine is collected at the bottom of the liquid storage tank 34 and is guided into the external circulating brine tank 7 through the brine outlet 33, and the brine is guided into the spiral pipe 73 again through the circulating pump 71 for heating and circulating evaporation purification.
Through the process of repeated circulation, the separation of lithium element and water in the brine can be realized, and the concentrated brine with high purity can be obtained under the non-airing operation.
Example 2: heat recovery in gradient heating brine concentration process
First-stage waste heat recovery: the hot steam in the brine circulation module 3 enters the heat exchange cavity 23 through the steam booster fan 76, a part of heat in the steam preheats the spiral pipe 73, and a part of high-temperature heat energy is stored by using the 2-phase change material 22 (phase change range is 60-100 ℃); the above procedures realize the extraction of heat in the high-temperature steam in the separation process;
second-stage waste heat recovery: the hot and humid air in the heat exchange cavity 23 enters the waste heat recovery port I51 into the waste heat recovery module 5 and is connected with the outer air outlet 52, in the process, heat exchange is realized through the circulating air inlet 53 and the circulating air outlet 54 which are arranged in a crossing way, the circulating air inlet 53 is connected with the preheating cavity 21, the circulating air outlet 54 is connected with the air pipe 13, the above connection system can carry out secondary recovery on the heat of the hot and humid air, heat exchange is carried out on the hot and humid air and the air of the solar heating module 1, and the initial temperature of air inlet in the solar heating module 1 is improved.
Examples
On the basis of the above connection structure, the technical scheme can also realize the waste heat recovery of the third stage, and the specific connection structure is as follows: the heat pump module 4 is provided with the evaporator 43 and the condenser 44, the condenser 44 is a heat release end and is arranged on one side of the air guide channel 41, the evaporator 43 is a heat absorption end and is arranged outside, the evaporator 43 is circularly connected to the condensing heat exchanger 62 through the condensing pipeline 9 (marked by a dash-dot line in fig. 1), the condensing heat exchanger 62 is connected to the condensing port 55, under the operation of the heat pump module 4, the condensation of steam on the condensing heat exchanger 62 is promoted through the evaporator 43, and the evaporator 43 absorbs the heat of the end of the waste heat recovery module 5, so that the operation efficiency of the heat pump module 4 is improved, and the temperature in the condensing heat exchanger 62 is reduced, so that the condensing heat of the wet hot air is required.
The lower part of the condensation heat exchanger 62 is also connected with a condensation recovery module 6, and liquid discharge is realized through a liquid outlet 61 on the condensation recovery module 6.
Further structural supplementation: in the above embodiments, the first temperature sensor 11 and the second temperature sensor 45 are both thermistor sensors, and the temperature measurement range is-50-200 ℃.
The first temperature sensor 11 and the second temperature sensor 45 function: the first temperature sensor 11 is positioned at the outlet end of the heat collecting module 8 in the solar heating module 1 and is used for detecting the heat collecting temperature in the heat collecting module 8, when the temperature is detected to be not lower than 60 ℃, the temperature signal feedback mechanism is used for controlling the starting of the booster fan 12, the heating and preheating requirements of the heat storage module 2 are provided, and when the temperature is detected to be lower than 60 ℃, the temperature signal feedback mechanism is used for controlling the closing of the booster fan 12; the second temperature sensor 45 is located at the outlet end of the heat pump module 4, and utilizes a temperature signal feedback mechanism to automatically adjust the temperature of hot air provided by the heat pump module 4 and keep at not lower than 90 ℃, and simultaneously utilizes the temperature signal feedback mechanism and the spraying rate in the spraying port 31 to jointly adjust the hot air quantity of the air outlet of the heat pump module 4. The above control principle can be implemented by a control circuit, and a person skilled in the art can implement conventional connection of the control circuit under the guidance of the above control manner, and details are not described here again.
In the technical scheme, the phase change material 22 has a step phase change heat storage function, and the phase change step heat storage temperature range is 60-80 ℃ and 80-100 ℃.
The inner side structure surface of the air guide channel 41 can be a smooth arc surface, and a spiral guide plate 42 with a guide function is selected in the technical scheme.
In the technical scheme, the top of the recovery separator is a heat-insulation movable top cover 36, and the heat-insulation movable top cover 36 is connected to the top of the liquid storage tank 34 by bolts.
In summary, this system makes the course of working of concentrated brine not influenced by the weather, utilize clean energy such as solar energy, air source heat pump to improve production efficiency, satisfy the requirement of industrialization production, this device still sets up phase change energy storage material in the heat accumulation module inside simultaneously, make it have the phase change heat accumulation function, on the one hand can improve the heat supply dispersibility and the instability that solar energy system itself receives illumination influence and produce, the condition of make full use of resource has improved the stability of system earlier, on the other hand, store unnecessary waste heat, reduce waste heat recovery in-process thermal loss, can transfer the heat of collecting to production system again, further promote the high-efficient operation of system.
Claims (6)
1. Brine gradient heating extraction device is characterized in that: the solar heating system comprises a solar heating module, a heat storage module, a halogen liquid circulation module and a heat pump module, wherein the solar heating module is connected with the heat storage module; the heat pump module is connected with a liquid storage tank in the brine circulation module, a spraying device is arranged in the liquid storage tank, a steam pipe is arranged in the liquid storage tank and is connected with the heat storage module, and the liquid storage tank is connected to the inside of the heat storage module through a pipeline and then used for guiding brine into the spraying device; the heat storage module comprises a double-layer cavity, wherein the inner-layer cavity is a heat exchange cavity, the outer layer is a preheating cavity, and a heat storage medium is arranged in the heat exchange cavity; the liquid pipeline is arranged in the heat exchange cavity in a spiral pipe structure.
2. The brine step heating extraction device of claim 1, wherein: the solar heating module comprises a heat collecting module, and the heat collecting module is connected with the preheating cavity through a hot air pipeline to realize preheating.
3. The brine step heating extraction device of claim 1, wherein: the hot air pipeline is provided with a waste heat recovery module, the inlet of the waste heat recovery module is respectively connected with a heat exchange cavity and a preheating cavity on the heat storage module through pipelines, and the outlet of the waste heat recovery module is respectively externally discharged and connected with the solar heating module to realize hot air circulation.
4. A brine step warming extraction apparatus according to claim 3, wherein: the waste heat recovery module is also connected with a condensation heat exchange device, and the condensation heat exchange device is connected with an evaporator in the heat pump module through a condensation pipeline to realize evaporation heat exchange; the condensing heat exchange device is also connected with the water storage device.
5. The brine step heating extraction device of claim 1, wherein: the liquid storage tank is connected with the circulating brine tank through a pipeline, and the circulating brine tank is connected with the circulating pipeline through a circulating pump to guide brine into the spraying device.
6. The brine step heating extraction device of claim 2, wherein: the heat collecting module comprises a supporting heat absorbing plate body, wherein a heat collecting and exchanging pipe is arranged in the supporting heat absorbing plate body, and an inlet end and an outlet end are arranged on the heat collecting and exchanging pipe and are connected with the outside.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310324808.4A CN116036622B (en) | 2023-03-30 | 2023-03-30 | Brine gradient heating extraction device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310324808.4A CN116036622B (en) | 2023-03-30 | 2023-03-30 | Brine gradient heating extraction device |
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| CN116036622A true CN116036622A (en) | 2023-05-02 |
| CN116036622B CN116036622B (en) | 2023-06-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210521790U (en) * | 2019-08-20 | 2020-05-15 | 江苏和诚制药设备制造有限公司 | Traditional chinese medicine enrichment facility based on carbon dioxide heat pump technology |
| CN111974015A (en) * | 2020-09-15 | 2020-11-24 | 江西臻强新能源有限公司 | Negative pressure concentration total heat type evaporation recovery system |
| US20210077952A1 (en) * | 2019-09-16 | 2021-03-18 | Korea Institute Of Science And Technology | Apparatus for membrane distillation using solar absorber and heat pump |
| CN214891958U (en) * | 2021-01-08 | 2021-11-26 | 上海交通大学 | Multi-heat-source coupling heat pump steam heating system |
| CN114100165A (en) * | 2021-12-29 | 2022-03-01 | 李爱松 | Multi-energy cascade utilization heat pump low-temperature evaporation concentration system capable of accurately controlling temperature |
-
2023
- 2023-03-30 CN CN202310324808.4A patent/CN116036622B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210521790U (en) * | 2019-08-20 | 2020-05-15 | 江苏和诚制药设备制造有限公司 | Traditional chinese medicine enrichment facility based on carbon dioxide heat pump technology |
| US20210077952A1 (en) * | 2019-09-16 | 2021-03-18 | Korea Institute Of Science And Technology | Apparatus for membrane distillation using solar absorber and heat pump |
| CN111974015A (en) * | 2020-09-15 | 2020-11-24 | 江西臻强新能源有限公司 | Negative pressure concentration total heat type evaporation recovery system |
| CN214891958U (en) * | 2021-01-08 | 2021-11-26 | 上海交通大学 | Multi-heat-source coupling heat pump steam heating system |
| CN114100165A (en) * | 2021-12-29 | 2022-03-01 | 李爱松 | Multi-energy cascade utilization heat pump low-temperature evaporation concentration system capable of accurately controlling temperature |
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