CN115307474A - Variable-temperature evaporation system utilizing low-grade waste heat - Google Patents
Variable-temperature evaporation system utilizing low-grade waste heat Download PDFInfo
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- CN115307474A CN115307474A CN202210947260.4A CN202210947260A CN115307474A CN 115307474 A CN115307474 A CN 115307474A CN 202210947260 A CN202210947260 A CN 202210947260A CN 115307474 A CN115307474 A CN 115307474A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 96
- 238000001704 evaporation Methods 0.000 title claims abstract description 50
- 230000008020 evaporation Effects 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 127
- 239000007788 liquid Substances 0.000 claims abstract description 103
- 239000011344 liquid material Substances 0.000 claims abstract description 82
- 230000003993 interaction Effects 0.000 claims abstract description 75
- 239000012141 concentrate Substances 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 239000003546 flue gas Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000010849 combustible waste Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a variable temperature evaporation system using low-grade waste heat, which comprises: the circulating water tank is used for storing liquid materials; the circulating pump is connected with the circulating water tank and circulates the liquid material in the variable-temperature evaporation system through the circulating pump; the heat exchanger is connected with the circulating pump, the heat exchanger is connected with the heat source of the low-grade waste heat, and the liquid material exchanges heat with the heat source of the low-grade waste heat through the heat exchanger; the gas-liquid interaction module is connected with the heat exchanger and the circulating water tank, the gas-liquid interaction module is connected with the air inlet device, air is blown into the gas-liquid interaction module through the air inlet device, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module, so that the heat exchange efficiency is improved. The invention adopts variable-temperature evaporation, the operation temperature is controllable and adjustable, and the invention is simple and easy to operate, and the system can obtain heat source from low-grade waste heat to operate by utilizing the characteristics of gas-liquid simultaneous mass transfer and heat transfer.
Description
Technical Field
The invention relates to the technical field of low-grade waste heat treatment, in particular to a variable-temperature evaporation system utilizing low-grade waste heat.
Background
Under the large background of energy conservation and emission reduction called for by the state, most enterprises optimize heat balance in a factory so that the energy utilization efficiency is higher. The waste heat is energy which is not utilized in energy utilization equipment under certain economic and technical conditions, namely redundant and waste energy. The waste heat is divided into different types according to different temperatures and enthalpy values. However, low-grade waste heat (for example, hot water at a temperature of 100 ℃ or below) is not provided with a corresponding process or system, and can only be used in some non-critical temperature-rising scenes, so that a situation of 'utilization for energy conservation' occurs.
The industrial waste heat mainly refers to low-grade energy such as waste heat, waste water, waste gas and the like discharged in the production process of heat energy conversion equipment and energy utilization equipment of industrial enterprises. The recovery and utilization of these low-grade energy sources by using waste heat recovery technology is one of the important means of energy saving. According to the temperature of the waste heat resource carrier, the waste heat resources can be divided according to the tastes, and the high temperature represents that the functional capability of the waste heat resources is high, namely the high-grade waste heat resources. And if the temperature is low, the grade of the waste heat resource is low.
1. The main sources of waste heat resources are: (1) flue gas waste heat; (2) residual heat of high temperature products and slag; (3) residual heat of the cooling medium; (4) waste heat of combustible waste gas, waste liquid and waste material; (5) waste gas and waste water residual heat; (6) the residual heat of the chemical reaction.
2. Typical low-grade waste heat resources include: (1) the smoke discharged from a boiler (heating furnace) and the like is generally 140-180 ℃; (2) flushing water of blast furnace slag and steel-making slag at the temperature of 60-9 ℃; (3) circulating cooling water, wherein the majority of the cooling water is 30-50 ℃; the produced water in oil field is at 30-60 deg.c.
3. The utilization difficulty of low-grade waste heat resources is as follows: (1) most of low-grade waste heat resources contain corrosive substances, and have little influence on long-term safe operation of equipment; (2) some low-grade waste heat resources have the characteristic of intermittence and are difficult to continuously operate; (3) due to the low grade, it is difficult to find a suitable heating (cooling) load near the site; (4) the device is used for power generation, the efficiency is low, the technology is still to be mature, and the economic benefit is low.
Disclosure of Invention
The invention aims to overcome the technical defects, provides a variable temperature evaporation system using low-grade waste heat, and solves the technical problem that low-grade waste heat resources are difficult to use in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention provides a variable temperature evaporation system using low-grade waste heat, which comprises:
the circulating water tank is used for storing liquid materials;
the circulating pump is connected with the circulating water tank and circulates the liquid material in the variable-temperature evaporation system through the circulating pump;
the heat exchanger is connected with the circulating pump, the heat exchanger is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of the low-grade waste heat through the heat exchanger;
and the gas-liquid interaction module is connected with the heat exchanger and the circulating water tank, is connected with air inlet equipment, and is used for blowing air into the gas-liquid interaction module through the air inlet equipment, so that the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module, and the heat exchange efficiency is improved.
Compared with the prior art, the invention has the beneficial effects that:
the existing evaporator generally utilizes the adjustment of vacuum degree to control the operation temperature, and the mode not only consumes large energy, but also has poor control of the vacuum degree. The existing evaporator generally utilizes waste heat which is waste steam or high-temperature flue gas, and can not utilize low-grade waste heat. The invention adopts variable-temperature evaporation, the operation temperature is controllable and adjustable, and the invention is simple and easy to operate, and the system can obtain heat source from low-grade waste heat to operate by utilizing the characteristics of gas-liquid simultaneous mass transfer and heat transfer. The invention adopts low-grade waste heat, has low operation energy consumption, reduces the operation cost, saves the steam consumption and also reduces the carbon dioxide emission. The invention operates under normal pressure, and belongs to a non-pressure system with higher safety.
According to some embodiments of the present invention, an air outlet end of the gas-liquid interaction module is provided with:
the demister is connected with the gas-liquid interaction module and is used for defoaming the liquid material;
and the filtering and adsorbing device is connected with the demister and used for adsorbing the liquid material in the discharged air.
According to some embodiments of the invention, the air intake apparatus comprises:
the dust removal and filtration device is used for removing impurities in air blown by the air inlet equipment;
and the fan is connected with the dust removal filtering device and the gas-liquid interaction module and used for blowing air into the gas-liquid interaction module.
According to some embodiments of the invention, the air intake apparatus further comprises:
and the air speed sensor is arranged between the fan and the gas-liquid interaction module and is used for measuring the air speed of air blown into the gas-liquid interaction module by the fan.
According to some embodiments of the present invention, the temperature swing evaporation system using low-grade waste heat further comprises:
the raw water feeding pump is connected with the circulating water tank and is used for pumping the liquid material into the circulating water tank;
and the concentrated liquid discharge pump is connected with the circulating water tank and used for discharging the concentrated liquid material which is subjected to heat exchange with the heat source of the low-grade waste heat in the circulating water tank.
According to some embodiments of the present invention, the raw water feed pump is provided with a safety valve and a buffer tank, and an electromagnetic flow meter and a power cut-off valve are further provided between the raw water feed pump and the feed inlet of the circulation tank.
According to some embodiments of the present invention, the concentrate discharge pump is provided with a safety valve and a buffer tank, one end of the concentrate discharge pump is connected to the discharge port of the circulation tank, and the other end of the concentrate discharge pump is further provided with an electromagnetic flow meter and an electric cut-off valve.
According to some embodiments of the present invention, the raw water feed pump and the concentrate discharge pump are respectively connected with an emergency stop button for stopping the operation of the raw water feed pump or the concentrate discharge pump.
According to some embodiments of the invention, the heat exchanger is provided with a heat source water inlet end and a heat source water outlet end.
According to some embodiments of the invention, the heat source water inlet end of the heat exchanger is provided with an electric regulating valve and a first temperature sensor, the electric regulating valve is used for regulating the water inlet quantity of the heat source water inlet end, and the first temperature sensor is used for measuring the water temperature of the heat source water inlet end;
and a second temperature sensor is arranged at the water outlet end of the heat source of the heat exchanger and is used for measuring the water temperature of the water outlet end of the heat source.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which the abstract is to be fully consistent with one of the figures of the specification:
fig. 1 is a schematic structural diagram of a temperature-varying evaporation system using low-grade waste heat according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that although functional block divisions are provided in the system drawings and logical orders are shown in the flowcharts, in some cases, the steps shown and described may be performed in different orders than the block divisions in the systems or in the flowcharts. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The invention provides a variable-temperature evaporation system utilizing low-grade waste heat, which adopts variable-temperature evaporation, has controllable and adjustable operation temperature, is simple and feasible, and utilizes the characteristics of simultaneous mass transfer and heat transfer of gas and liquid to ensure that the system can obtain a heat source from the low-grade waste heat for operation. The invention adopts low-grade waste heat, has low operation energy consumption, reduces the operation cost, saves the steam consumption and also reduces the carbon dioxide emission. The invention operates under normal pressure, and belongs to a non-pressure system with higher safety.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a temperature-varying evaporation system using low-grade waste heat according to an embodiment of the present invention.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved.
The variable-temperature evaporation system utilizing the low-grade waste heat provided by the embodiment adopts variable-temperature evaporation, the operation temperature is controllable and adjustable, the operation is simple and feasible, and the system can obtain a heat source from the low-grade waste heat to operate by utilizing the characteristics of simultaneous mass transfer and heat transfer of gas and liquid. The invention adopts low-grade waste heat, has low operation energy consumption, reduces the operation cost, saves the steam consumption and also reduces the carbon dioxide emission. The invention operates under normal pressure, and belongs to a non-pressure system with higher safety.
Firstly, the material enters the circulating water tank 110 and circulates through the circulating pump 120; in the material circulation process, heat exchange is completed with low-grade waste heat through the heat exchanger 130; the material is heated, and the material is not evaporated but is a heat source in the system; next, new air is continuously introduced into the system, and the material and the new air are pulled into a liquid film and an air film by using the gas-liquid interaction module 140, so that the heat exchange efficiency is improved; when the new air obtains heat from the materials, the temperature of the new air is increased, and the water carrying capacity of the new air is also exponentially improved; therefore, when mass transfer and heat transfer between the air and the material occur, the moisture in the material is continuously taken away by the flowing gas, and the concentration of the material is completed.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation water tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved.
The air outlet end of the gas-liquid interaction module 140 is provided with: the demister is connected with the gas-liquid interaction module 140 and is used for defoaming the liquid material; and the filtering and adsorbing device is connected with the demister and used for adsorbing the liquid material in the discharged air. It is understood that the filter adsorbent device may use activated carbon as the adsorbent material.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation water tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with the heat source of the low-grade waste heat, and the liquid material exchanges heat with the heat source of the low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved.
The air intake device 150 includes: a dust removing and filtering device for removing impurities in the air blown into the air inlet equipment 150; and the fan is connected with the dust removal filtering device and the gas-liquid interaction module 140 and is used for blowing air into the gas-liquid interaction module 140.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation water tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved.
The air intake device 150 includes: a dust removing and filtering device for removing impurities in the air blown by the air inlet equipment 150; the fan is connected with the dedusting filter device and the gas-liquid interaction module 140 and is used for blowing air into the gas-liquid interaction module 140; and the air speed sensor is arranged between the fan and the gas-liquid interaction module 140, and is used for measuring the air speed of air blown into the gas-liquid interaction module 140 by the fan and adjusting the air inflow according to actual requirements and the current air speed.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation water tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved. A raw water feed pump connected to the circulation tank 110, the raw water feed pump being configured to pump liquid materials into the circulation tank 110; and the concentrated liquid discharge pump is connected with the circulating water tank 110 and is used for discharging concentrated liquid materials in the circulating water tank 110, wherein the concentrated liquid materials are subjected to heat exchange with a heat source of low-grade waste heat.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation water tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved. A raw water feed pump connected to the circulation tank 110, the raw water feed pump being configured to pump liquid materials into the circulation tank 110; and the concentrated liquid discharge pump is connected with the circulating water tank 110 and is used for discharging concentrated liquid materials in the circulating water tank 110, wherein the concentrated liquid materials are subjected to heat exchange with a heat source of low-grade waste heat. The raw water feed pump is provided with a safety valve and a buffer tank, and an electromagnetic flowmeter and an electric cut-off valve are further arranged between the raw water feed pump and the feed inlet of the circulation water tank 110.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation water tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved. A raw water feeding pump connected to the circulation tank 110, the raw water feeding pump being configured to pump liquid materials into the circulation tank 110; and the concentrated liquid discharge pump is connected with the circulating water tank 110 and is used for discharging concentrated liquid materials in the circulating water tank 110, wherein the concentrated liquid materials are subjected to heat exchange with a heat source of low-grade waste heat. The concentrate discharge pump is provided with relief valve and buffer tank, and the one end of concentrate discharge pump is connected with circulation tank 110's discharge gate, and the other one end of concentrate discharge pump still is provided with electromagnetic flowmeter and electronic trip valve.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation water tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with the heat source of the low-grade waste heat, and the liquid material exchanges heat with the heat source of the low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved. A raw water feeding pump connected to the circulation tank 110, the raw water feeding pump being configured to pump liquid materials into the circulation tank 110; and the concentrated liquid discharge pump is connected with the circulating water tank 110 and is used for discharging concentrated liquid materials in the circulating water tank 110, wherein the concentrated liquid materials are subjected to heat exchange with a heat source of low-grade waste heat. The raw water feed pump is provided with a safety valve and a buffer tank, and an electromagnetic flowmeter and an electric cut-off valve are further provided between the raw water feed pump and the feed inlet of the circulation tank 110. The concentrate discharge pump is provided with relief valve and buffer tank, and the one end of concentrate discharge pump is connected with circulation tank 110's discharge gate, and the other one end of concentrate discharge pump still is provided with electromagnetic flowmeter and electronic trip valve.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with the heat source of the low-grade waste heat, and the liquid material exchanges heat with the heat source of the low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved. A raw water feed pump connected to the circulation tank 110, the raw water feed pump being configured to pump liquid materials into the circulation tank 110; and the concentrated liquid discharge pump is connected with the circulating water tank 110 and is used for discharging concentrated liquid materials in the circulating water tank 110, wherein the concentrated liquid materials are subjected to heat exchange with a heat source of low-grade waste heat.
The raw water feed pump is provided with a safety valve and a buffer tank, and an electromagnetic flowmeter and an electric cut-off valve are further arranged between the raw water feed pump and the feed inlet of the circulation water tank 110. The concentrate discharge pump is provided with relief valve and buffer tank, and the one end of concentrate discharge pump is connected with circulation tank 110's discharge gate, and the other one end of concentrate discharge pump still is provided with electromagnetic flowmeter and electronic trip valve. The raw water feeding pump and the concentrated solution discharging pump are respectively connected with an emergency stop button, and the emergency stop button is used for stopping the raw water feeding pump or the concentrated solution discharging pump.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation water tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved. The heat exchanger 130 is provided with a heat source water inlet end and a heat source water outlet end.
In one embodiment, a temperature swing evaporation system using low-grade waste heat comprises: a circulation water tank 110 for storing liquid materials; the circulating pump 120 is connected with the circulating water tank 110, and the liquid material is circulated in the variable-temperature evaporation system through the circulating pump 120; the heat exchanger 130 is connected with the circulating pump 120, the heat exchanger 130 is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of low-grade waste heat through the heat exchanger 130; the gas-liquid interaction module 140 is connected with the heat exchanger 130 and the circulation water tank 110, the gas-liquid interaction module 140 is connected with the air inlet device 150, air is blown into the gas-liquid interaction module 140 through the air inlet device 150, and the liquid material and the air are pulled into a liquid film and an air film through the gas-liquid interaction module 140, so that the heat exchange efficiency is improved. The heat exchanger 130 is provided with a heat source water inlet end and a heat source water outlet end.
An electric regulating valve and a first temperature sensor are arranged at the water inlet end of the heat source of the heat exchanger 130, the electric regulating valve is used for regulating the water inlet quantity of the water inlet end of the heat source, and the first temperature sensor is used for measuring the water temperature of the water inlet end of the heat source; the heat source water outlet end of the heat exchanger 130 is provided with a second temperature sensor for measuring the water temperature at the heat source water outlet end.
The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
It will be understood by those of ordinary skill in the art that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, or suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A variable temperature evaporation system using low-grade waste heat is characterized by comprising:
the circulating water tank is used for storing liquid materials;
the circulating pump is connected with the circulating water tank and circulates the liquid material in the variable-temperature evaporation system through the circulating pump;
the heat exchanger is connected with the circulating pump, the heat exchanger is connected with a heat source of low-grade waste heat, and the liquid material exchanges heat with the heat source of the low-grade waste heat through the heat exchanger;
the gas-liquid interaction module is connected with the heat exchanger and the circulating water tank, connected with gas inlet equipment, and used for blowing air into the gas-liquid interaction module through the gas inlet equipment, and enabling the liquid material and the air to be pulled into a liquid film and a gas film through the gas-liquid interaction module so as to improve the heat exchange efficiency.
2. The variable temperature evaporation system using low-grade waste heat according to claim 1, wherein an air outlet end of the gas-liquid interaction module is provided with:
the demister is connected with the gas-liquid interaction module and is used for defoaming the liquid material;
and the filtering and adsorbing device is connected with the demister and is used for adsorbing the liquid material in the discharged air.
3. The variable temperature evaporation system using low-grade waste heat according to claim 1, wherein the air inlet device comprises:
the dust removal and filtration device is used for removing impurities in air blown by the air inlet equipment;
and the fan is connected with the dust removal filtering device and the gas-liquid interaction module and used for blowing air into the gas-liquid interaction module.
4. The variable temperature evaporation system using low-grade waste heat according to claim 3, wherein the air inlet equipment further comprises:
and the air speed sensor is arranged between the fan and the gas-liquid interaction module and is used for measuring the air speed of air blown into the gas-liquid interaction module by the fan.
5. The variable temperature evaporation system using low-grade waste heat according to claim 1, further comprising:
the raw water feeding pump is connected with the circulating water tank and is used for pumping the liquid material into the circulating water tank;
and the concentrated liquid discharge pump is connected with the circulating water tank and used for discharging the concentrated liquid material which is subjected to heat exchange with the heat source of the low-grade waste heat in the circulating water tank.
6. The variable temperature evaporation system using low-grade waste heat according to claim 5, wherein the raw water feed pump is provided with a safety valve and a buffer tank, and an electromagnetic flow meter and an electric cut-off valve are further arranged between the raw water feed pump and the feed inlet of the circulating water tank.
7. The variable temperature evaporation system using low-grade waste heat according to claim 5 or 6, wherein the concentrate discharge pump is provided with a safety valve and a buffer tank, one end of the concentrate discharge pump is connected with the discharge hole of the circulating water tank, and the other end of the concentrate discharge pump is further provided with an electromagnetic flow meter and an electric cut-off valve.
8. The system for changing temperature and evaporating by using low-grade waste heat according to claim 7, wherein the raw water feed pump and the concentrated liquid discharge pump are respectively connected with an emergency stop button, and the emergency stop button is used for stopping the operation of the raw water feed pump or the concentrated liquid discharge pump.
9. The variable temperature evaporation system using low-grade waste heat according to claim 1, wherein the heat exchanger is provided with a heat source water inlet end and a heat source water outlet end.
10. The variable temperature evaporation system using low-grade waste heat according to claim 9, wherein an electric regulating valve and a first temperature sensor are arranged at a water inlet end of a heat source of the heat exchanger, the electric regulating valve is used for regulating the water inlet quantity of the water inlet end of the heat source, and the first temperature sensor is used for measuring the water temperature of the water inlet end of the heat source;
and a second temperature sensor is arranged at the water outlet end of the heat source of the heat exchanger and is used for measuring the water temperature of the water outlet end of the heat source.
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| CN202210947260.4A CN115307474A (en) | 2022-08-09 | 2022-08-09 | Variable-temperature evaporation system utilizing low-grade waste heat |
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| CN202210947260.4A CN115307474A (en) | 2022-08-09 | 2022-08-09 | Variable-temperature evaporation system utilizing low-grade waste heat |
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