CN219347470U - High-temperature primary water and low-temperature secondary water heat exchange device in alumina production - Google Patents
High-temperature primary water and low-temperature secondary water heat exchange device in alumina production Download PDFInfo
- Publication number
- CN219347470U CN219347470U CN202223445586.1U CN202223445586U CN219347470U CN 219347470 U CN219347470 U CN 219347470U CN 202223445586 U CN202223445586 U CN 202223445586U CN 219347470 U CN219347470 U CN 219347470U
- Authority
- CN
- China
- Prior art keywords
- temperature
- heat exchange
- secondary water
- primary water
- temperature secondary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a heat exchange device for high-temperature primary water and low-temperature secondary water in alumina production, and belongs to the technical field of alumina production. Including first heat exchanger and second heat exchanger, be equipped with high temperature primary water inlet, intermediate temperature primary water outlet, intermediate temperature secondary water inlet and high temperature secondary water outlet on the first heat exchanger, be equipped with intermediate temperature primary water inlet, low temperature secondary water inlet, intermediate temperature secondary water outlet and cooling primary water outlet on the second heat exchanger, intermediate temperature primary water outlet communicates with intermediate temperature primary water inlet, intermediate temperature secondary water outlet communicates with intermediate temperature secondary water inlet, and high temperature primary water flows into first heat exchanger and intermediate temperature secondary water through high temperature primary water inlet and carries out heat exchange, and intermediate temperature primary water flows into second heat exchanger and carries out heat exchange with low temperature secondary water. The quality of the high-temperature primary water cooled in the method has no loss, 100% returns to the boiler of the thermal power plant, and the production cost is reduced.
Description
Technical Field
The utility model relates to a heat exchange device for high-temperature primary water and low-temperature secondary water in alumina production, and belongs to the technical field of alumina production.
Background
The steam condensate water in the alumina production evaporation process is divided into high-temperature primary water and low-temperature secondary water, wherein the high-temperature primary water is the steam condensate water obtained by heating and condensing high Wen Xin steam from a boiler of a thermal power plant by a first-effect evaporator, the temperature is 158-170 ℃, the texture is very pure, and the steam condensate water can be returned to the boiler of the thermal power plant and directly enter the boiler; the low-temperature secondary water is the steam condensate water after the secondary steam evaporated from the solution in each effect such as the second effect, the third effect, the fourth effect, the fifth effect, the sixth effect, the seventh effect and the like after the first effect evaporator. The temperature of the steam condensate water after the secondary steam condensation from the final effect (six-effect or seven-effect) is 68 ℃ to 70 ℃. The low-temperature secondary water is steam condensate water obtained by condensing secondary steam evaporated from various-effect sodium aluminate solutions, so that the low-temperature secondary water cannot be used for washing other materials (aluminum hydroxide and red mud) in alumina production due to the fact that the low-temperature secondary water is not high in conductivity and contains certain alkali and other impurity components and cannot be returned to a boiler for utilization due to poor water quality. The primary water contains great heat due to high temperature, and most of the heat contained in the primary water is recovered to an evaporation process before the primary water returns to a boiler of a thermal power plant, so that the consumption of new steam with high price is further reduced, and the production cost of alumina is reduced.
The traditional method is that a group of ' primary water series condensed water tanks ' 1-2#, 1-3#, 1-4#, 1-5#, 1-6#, and 1-7# ' are specially arranged at the second effect-last effect (six-effect or seven-effect), high-temperature primary water from the first-effect condensed water tank 1-1# is sequentially sent into the series condensed water tanks for step-by-step flash evaporation, heat is recovered, and after the complete flash evaporation of the final stage 1-6# or 1-7# is completed, condensed water with the temperature reduced to 68 ℃ below zero is sent back to a heat recovery power plant boiler. The traditional method can effectively recycle the heat of high-temperature primary water, but in the flash evaporation process of the primary water system condensate tank, each flash evaporation inevitably enters secondary water along with certain flash evaporation steam, so that the primary water quality is lost. According to the production operation statistics of a 450 ton/h seven-effect evaporator in an alumina factory in China, the method for directly flash evaporating and recovering heat step by using primary water is adopted, so that the loss of the primary water is 10.5 tons/h. This means that the thermal power plant must additionally produce normal water to 10.5 tons/h, and this water is made into qualified boiler feed water by complex water production processes of purification, deionization, deoxidation, etc. to supplement the shortage of water returned from evaporation, thereby increasing the production cost of alumina and becoming a problem of reducing the cost of alumina production for a long time.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a heat exchange device for high-temperature primary water and low-temperature secondary water in alumina production aiming at the prior art, wherein after the high-temperature primary water exchanges heat with the low-temperature secondary water, the temperature of the high-temperature primary water is reduced from 158-170 ℃ to 76 ℃, the quality of the cooled high-temperature primary water is returned to a boiler of a thermal power plant without any loss by 100%, a supplementary water supply manufacturing process is omitted, and the production cost is reduced.
The utility model solves the problems by adopting the following technical scheme: a heat exchange device for high-temperature primary water and low-temperature secondary water in alumina production comprises two heat exchangers: the heat exchange device comprises a first heat exchanger and a second heat exchanger, wherein a high-temperature primary water inlet, a middle-temperature primary water outlet, a middle-temperature secondary water inlet and a high-temperature secondary water outlet are arranged on the first heat exchanger, a middle-temperature primary water inlet, a low-temperature secondary water inlet, a middle-temperature secondary water outlet and a cooling primary water outlet are arranged on the second heat exchanger, the high-temperature primary water inlet is communicated with a first-effect condensation water tank water outlet, the middle-temperature primary water outlet is communicated with the middle-temperature primary water inlet, the low-temperature secondary water inlet is communicated with a last-effect condensation water tank water outlet, the middle-temperature secondary water outlet is communicated with a water inlet of any one-effect condensation water tank, high-temperature primary water flowing out of the first-effect condensation water tank water outlet flows into the first heat exchanger through the high-temperature primary water inlet to be subjected to heat exchange with the middle-temperature secondary water to form middle-temperature primary water and high-temperature secondary water, and then the middle-temperature primary water flows into the second heat exchanger to be subjected to heat exchange with the low-temperature secondary water to form middle-temperature secondary water and cooling primary water.
The first heat exchanger comprises a first heat exchange shell which is vertically arranged, a first heat exchange tube bundle is arranged in the first heat exchange shell, two ends of the first heat exchange shell are respectively provided with a first tube plate, the first heat exchange tube bundle is fixed in the first heat exchange shell through the first tube plates, two ends of the first heat exchange shell are respectively covered with a first end cover, a first partition plate is arranged in the first end cover at the lower end, and a high-temperature primary water inlet and a middle-temperature primary water outlet are respectively communicated with an inner cavity of the first heat exchange shell, so that high-temperature primary water flows into the inner cavity of the first heat exchange shell through the high-temperature primary water inlet for heat exchange, forms middle-temperature primary water after heat exchange, and flows out through the middle-temperature primary water outlet; the intermediate temperature secondary water inlet and the high temperature secondary water outlet are respectively arranged on the first end cover at the lower end, the intermediate temperature secondary water inlet and the high temperature secondary water outlet are respectively communicated with the first heat exchange tube bundle, the intermediate temperature secondary water flows into the first heat exchange tube bundle through the intermediate temperature secondary water inlet for heat exchange, high temperature secondary water is formed after heat exchange, and then flows out through the high temperature secondary water outlet.
The second heat exchanger comprises a second heat exchange shell which is vertically arranged, a second heat exchange tube bundle is arranged in the second heat exchange shell, two ends of the second heat exchange shell are respectively provided with a second tube plate, the second heat exchange tube bundle is fixed in the second heat exchange shell through the second tube plates, two ends of the second heat exchange shell are respectively covered with a second end cover, the low-temperature secondary water inlet and the middle-temperature secondary water outlet are respectively arranged on the second end covers at the lower ends, and the low-temperature secondary water inlet and the middle-temperature secondary water outlet are communicated with the second heat exchange tube bundle; the low-temperature secondary water flows into a second heat exchange tube bundle through the low-temperature secondary water inlet to exchange heat, and forms intermediate-temperature secondary water after heat exchange, and then flows out through an intermediate-temperature secondary water outlet; the intermediate temperature primary water inlet and the cooling primary water outlet are respectively arranged on the second heat exchange shell, intermediate temperature primary water flows into the inner cavity of the second heat exchange shell through the intermediate temperature primary water inlet for heat exchange to form cooling primary water, and then flows out through the cooling primary water outlet.
Two second partition plates are arranged in the second end cover at intervals vertically, so that the direction of low-temperature secondary water flow in the second heat exchange tube bundle is in a snake shape.
The first heat exchange shell, the second heat exchange shell, the first partition plate, the second partition plate, the first tube plate and the second tube plate are made of Q345R steel plates respectively.
The first heat exchange tube bundle and the second heat exchange tube bundle are respectively seamless steel tube manufactured pieces.
Compared with the prior art, the utility model has the advantages that: the high-temperature primary water and low-temperature secondary water heat exchange device in alumina production sequentially passes through the first heat exchanger and the second heat exchanger to exchange heat with the low-temperature secondary water with the temperature of 68 ℃ so that the temperature of the high-temperature primary water is reduced to 76 ℃ to form primary water, the quality of the high-cost primary water is 100% without any loss, and the production cost is reduced. The low-temperature secondary water at 68 ℃ sequentially passes through the second heat exchanger and the first heat exchanger to exchange heat, the temperature is increased to 144 ℃, then the low-temperature secondary water enters a three-effect-seven-effect condensation water tank system for flash evaporation, heat is released to an evaporator system, and the high-temperature secondary water bears the water quantity which must be consumed by each flash evaporation.
Drawings
FIG. 1 is a schematic diagram of a heat exchange device for high temperature primary water and low temperature secondary water in alumina production according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the operation of the multiple effect evaporator system;
in the figure, a first heat exchanger 1, a first heat exchange shell 1.1, a first heat exchange tube bundle 1.2, a first tube plate 1.3, a first end cover 1.4, a high-temperature primary water inlet 1.5, a high-temperature secondary water outlet 1.6, a middle-temperature primary water outlet 1.7, a first partition plate 1.8, a middle-temperature secondary water inlet 1.9, a second heat exchanger 2, a second heat exchange shell 2.1, a second heat exchange tube bundle 2.2, a first heat exchange tube bundle 2.2, a second heat exchange tube bundle 2.3, a first heat exchange tube 2.3 second tube plate, 2.4 second end cover, 2.5 low temperature secondary water inlet, 2.6 cooling primary water outlet, 2.7 intermediate temperature primary water inlet, 2.8 second partition plate, 2.9 intermediate temperature secondary water outlet, 3 first effect condensation water tank, 4 three effect condensation water tank, 5 four effect condensation water tank, 6 five effect condensation water tank, 7 six effect condensation water tank, 8 seven effect condensation water tank, 9 water pump.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 and 2, a heat exchange device for high-temperature primary water and low-temperature secondary water in alumina production in this embodiment includes two heat exchangers: the heat exchanger comprises a first heat exchanger 1 and a second heat exchanger 2, wherein the first heat exchanger 1 comprises a first heat exchange shell 1.1 which is vertically arranged, a first heat exchange tube bundle 1.2 which is vertically arranged is arranged in the first heat exchange shell 1.1, two ends of the first heat exchange shell 1.1 are respectively provided with a first tube plate 1.3, and the first heat exchange tube bundle 1.2 and the first tube plates 1.3 are fixedly connected through strong expansion connection, so that the first heat exchange tube bundle 1.2 is fixed in the first heat exchange shell 1.1. The outer sides of the first tube plates 1.3 are respectively provided with a first end cover 1.4, and the first end covers 1.4 are covered at two ends of the first heat exchange shell 1.1. The side of the bottom of the first heat exchange shell 1.1 is provided with a high-temperature primary water inlet 1.5, the side of the top of the first heat exchange shell 1.1 is provided with a middle-temperature primary water outlet 1.7, and the high-temperature primary water inlet 1.5 and the middle-temperature primary water outlet 1.7 are respectively communicated with the inner cavity of the first heat exchange shell 1.1. A first partition plate 1.8 arranged vertically is arranged in the first end cover 1.4 at the lower end, and the first end cover 1.4 at the lower end is partitioned. The intermediate temperature secondary water inlet 1.9 and the high temperature secondary water outlet 1.6 are respectively arranged at two sides of the first partition plate 1.8, and the intermediate temperature secondary water inlet 1.9 and the high temperature secondary water outlet 1.6 are respectively communicated with the first heat exchange tube bundle 1.2 to form the double-tube Cheng Lie tubular heat exchanger.
The second heat exchanger 2 comprises a second heat exchange shell 2.1 which is vertically arranged, a second heat exchange tube bundle 2.2 which is vertically arranged is arranged in the second heat exchange shell 2.1, two ends of the second heat exchange shell 2.1 are respectively provided with a second tube plate 2.3, and the connection mode of the second heat exchange tube bundle 2.2 and the second tube plate 2.3 is strong expansion connection, so that the second heat exchange tube bundle 2.2 is fixed in the second heat exchange shell 2.1. The outer sides of the second tube plates 2.3 are respectively provided with a second end cover 2.4, and the second end covers 2.4 are covered at two ends of the second heat exchange shell 2.1. The side of the bottom of the second heat exchange shell 2.1 is provided with a middle-temperature primary water inlet 2.7, and the side of the top of the second heat exchange shell 2.1 is provided with a cooling primary water outlet 2.6. The second end cover 2.4 at the lower end is provided with a low-temperature secondary water inlet 2.5 and an intermediate-temperature secondary water outlet 2.9, and the low-temperature secondary water inlet 2.5 and the intermediate-temperature secondary water outlet 2.9 are respectively communicated with the second heat exchange tube bundle 2.2. The second end cover at the upper end is internally provided with a second partition plate 2.8 which is vertically arranged, the second end cover at the lower end is internally provided with two second partition plates which are arranged in parallel at intervals to form a four-tube Cheng Lie tubular heat exchanger, so that the flow direction of liquid in the second heat exchange tube bundle is in a serpentine shape.
The high-temperature primary water inlet is communicated with a water outlet of a first-effect condensation water tank in the multi-effect evaporator system, the middle-temperature primary water outlet is communicated with a middle-temperature primary water inlet, the low-temperature secondary water inlet is communicated with a water outlet of a seven-effect condensation water tank in the multi-effect evaporator system, the middle-temperature secondary water outlet is communicated with a middle-temperature secondary water inlet, and the high-temperature secondary water outlet is communicated with a water inlet of a three-effect condensation water tank in the multi-effect evaporator system. The high-temperature primary water flowing out of the water outlet of the first-effect condensation water tank flows into the inner cavity of the first heat exchange shell through the high-temperature primary water inlet to exchange heat with the intermediate-temperature secondary water flowing in from the intermediate-temperature secondary water inlet, and the intermediate-temperature primary water and the high-temperature secondary water are formed after heat exchange, and the high-temperature secondary water is led to the three-effect condensation water tank for recycling; the intermediate temperature primary water flows into the inner cavity of the second heat exchange shell through the intermediate temperature primary water outlet and the intermediate temperature primary water inlet, the low-temperature secondary water flowing out of the water outlet of the seven-effect condensing water tank flows into the second heat exchange tube bundle through the low-temperature secondary water inlet, so that the intermediate temperature primary water and the low-temperature secondary water exchange heat to form intermediate temperature secondary water and cooling primary water, the cooling primary water flows out through the cooling primary water outlet, and the intermediate temperature secondary water flows into the first heat exchange tube bundle through the intermediate temperature secondary water outlet and the intermediate temperature secondary water inlet; the primary cooling water is pumped into a boiler of the thermal power plant through a water pump for continuous use.
The first heat exchange tube bundle in the first heat exchanger and the second heat exchange tube bundle in the second heat exchanger are respectively made of 20GGB/T5310-2017 high-pressure boiler seamless steel tubes. The heat exchange area determined by the selected specification and the number of the first heat exchange tube bundle and the second heat exchange tube bundle is calculated according to the heat exchanged by the high-temperature primary water and the low-temperature secondary water. The first heat exchange shell, the second heat exchange shell, the first partition plate, the second partition plate, the first tube plate and the second tube plate are all made of Q345R steel plates, and the specifications of the first heat exchange shell, the second heat exchange shell, the first tube plate and the second tube plate are implemented according to the specifications of the working pressure pressing force container design specifications GB 150.1-150.4-2011 and GB/T151-2014 of equipment.
After new steam from a thermal power plant enters a heating chamber of a first-effect evaporator to heat a solution, new steam condensate water of the new steam is high-temperature primary water, wherein the temperature of the high-temperature primary water is 158-170 ℃, high-temperature primary water flowing out of a water outlet of a first-effect condensate water tank 3 enters an inner cavity of a first heat exchange shell through a high-temperature primary water inlet and exchanges heat with intermediate-temperature secondary water with the temperature of 106 ℃ in a first heat exchange tube bundle, and the temperature of the high-temperature primary water is reduced to 123 ℃ to form intermediate-temperature primary water; the intermediate temperature primary water enters the inner cavity of the second heat exchange shell from the intermediate temperature primary water outlet and the intermediate temperature primary water inlet, and exchanges heat with the low-temperature secondary water with the temperature of 68 ℃ in the second heat exchange tube bundle, the intermediate temperature primary water is further reduced to 76 ℃ to form cooling primary water, the cooling primary water is discharged from the cooling primary water outlet and enters the water pump 9, and the cooling primary water is sent back to the boiler of the thermal power plant by the water pump 9 without any loss 100%.
The low-temperature secondary water with the temperature of 68 ℃ generated in the running process of the multi-effect evaporator system enters the second heat exchanger through the low-temperature secondary water inlet, exchanges heat with the intermediate-temperature primary water with the temperature of 123 ℃, the low-temperature secondary water is heated to 106 ℃ to form intermediate-temperature secondary water, then flows out from the intermediate-temperature secondary water outlet, enters the first heat exchanger through the intermediate-temperature secondary water inlet, exchanges heat with the high-temperature primary water with the temperature of 158-170 ℃, the intermediate-temperature secondary water is increased to 144 ℃, high-temperature secondary water is formed, and is discharged from the high-temperature secondary water through the high-temperature secondary water outlet, so that the heat exchange process of the high-temperature primary water and the low-temperature secondary water is completed.
The temperature of the secondary water (high-temperature secondary water) after heat exchange and temperature rise reaches 144 ℃, the secondary water enters the three-effect condensation water tank 4 at first, and is subjected to flash evaporation with the 134.5 ℃ high-temperature water from the two-effect condensation water tank 4, the temperature is reduced to 126 ℃ after part of heat is released, then the secondary water enters the four-effect condensation water tank 5 to be subjected to flash evaporation, the temperature is reduced to 110.5 ℃ after part of heat is released, then the secondary water enters the five-effect condensation water tank 6 to be subjected to flash evaporation, the temperature is reduced to 96.5 ℃ after part of heat is released, then the secondary water enters the six-effect condensation water tank 7 to be subjected to flash evaporation, the temperature is reduced to 82.5 ℃ after part of heat is released, then the secondary water enters the seven-effect condensation water tank 8 to be subjected to flash evaporation, and part of heat is released. The secondary water with the temperature of 144 ℃ after heat exchange and temperature rise is subjected to flash evaporation in a three-effect condensation water tank, a four-effect condensation water tank, a five-effect condensation water tank, a six-effect condensation water tank and a seven-effect condensation water tank in sequence to release heat, the temperature is finally reduced to 68 ℃ and then is recycled to the second heat exchanger and the first heat exchanger again, the heat exchange and temperature rise are carried out to 144 ℃, and then the secondary water is returned to the three-effect to seven-effect condensation water tank system to flash evaporation to release heat … …. With the process of flash evaporation and heat release of the condensate tank in each effect, a part of water quantity is inevitably lost in each flash evaporation and heat release, and the lost part of water quantity is acted by secondary water which has poor water quality and is cheap and can not be returned to the boiler.
In the whole process, the high-temperature primary water at 158-170 ℃ sequentially passes through the first heat exchanger and the second heat exchanger to exchange heat to the low-temperature secondary water at 68 ℃, so that the temperature of the high-temperature primary water is reduced to 76 ℃, primary water is formed, and the quality of the high-cost primary water is fed back to the power plant boiler without any loss by 100%. The low-temperature secondary water at 68 ℃ sequentially passes through the second heat exchanger and the first heat exchanger to exchange heat, the temperature is increased to 144 ℃, and then the water enters a three-effect-seven-effect condensation water tank system to be flashed, and the heat is released to an evaporator system … ….
The structural form of the heat exchanger is not only a tube type heat exchanger, but also a plate type heat exchanger with the same plate structure and heat exchange principle. The heat exchange stage number of the heat exchanger not only refers to secondary heat exchange, but also comprises primary heat exchange and tertiary heat exchange. The saturation temperature of the new steam is 158-170 ℃ and 140-170 ℃. The applicable evaporator system not only refers to a seven-effect evaporator system, but also comprises a six-effect evaporator system and a five-effect evaporator system.
The utility model relates to a thermodynamic system for the operation of a high-temperature primary water and low-temperature secondary water heat exchange device in alumina production, wherein the operation temperature system of each effect condensate water tank is shown in a first table.
TABLE 1
| Class of water | Heat exchange start temperature °c | Intermediate temperature of heat exchange | Heat exchange end temperature °c |
| Disposable water | 158～170 | ～123 | ～76 |
| Secondary water | ～68 | ～106 | ～144 |
TABLE 2
The heat of the high-temperature primary water can be transferred to the low-temperature secondary water in a heat exchange mode, the low-temperature secondary water heated by the received heat is used for completing flash evaporation to release heat to the evaporator system, and meanwhile, the secondary water bears the water quantity which is required to be consumed by each flash evaporation; and the high-cost primary water quality can be fed back to the heat recovery power plant boiler without any loss by 100%, so that the supplementary water supply manufacturing process of the heat recovery power plant boiler is omitted, and obvious economic benefits are obtained.
In addition to the above embodiments, the present utility model also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present utility model.
Claims (6)
1. A heat exchange device for high-temperature primary water and low-temperature secondary water in alumina production is characterized in that: comprises two heat exchangers: the heat exchange device comprises a first heat exchanger and a second heat exchanger, wherein a high-temperature primary water inlet, a middle-temperature primary water outlet, a middle-temperature secondary water inlet and a high-temperature secondary water outlet are arranged on the first heat exchanger, a middle-temperature primary water inlet, a low-temperature secondary water inlet, a middle-temperature secondary water outlet and a cooling primary water outlet are arranged on the second heat exchanger, the middle-temperature primary water outlet is communicated with the middle-temperature primary water inlet, the middle-temperature secondary water outlet is communicated with the middle-temperature secondary water inlet, high-temperature primary water flows into the first heat exchanger through the high-temperature primary water inlet to exchange heat with the middle-temperature secondary water to form middle-temperature primary water and high-temperature secondary water, and then the middle-temperature primary water flows into the second heat exchanger to exchange heat with the low-temperature secondary water to form middle-temperature secondary water and cooling primary water.
2. The heat exchange device for high-temperature primary water and low-temperature secondary water in alumina production according to claim 1, wherein: the first heat exchanger comprises a first heat exchange shell which is vertically arranged, a first heat exchange tube bundle is arranged in the first heat exchange shell, two ends of the first heat exchange shell are respectively provided with a first tube plate, the first heat exchange tube bundle is fixed in the first heat exchange shell through the first tube plates, two ends of the first heat exchange shell are respectively covered with a first end cover, a first partition plate is arranged in the first end cover at the lower end, and a high-temperature primary water inlet and a middle-temperature primary water outlet are respectively communicated with an inner cavity of the first heat exchange shell, so that high-temperature primary water flows into the inner cavity of the first heat exchange shell through the high-temperature primary water inlet for heat exchange, forms middle-temperature primary water after heat exchange, and flows out through the middle-temperature primary water outlet; the intermediate temperature secondary water inlet and the high temperature secondary water outlet are respectively arranged on the first end cover at the lower end, the intermediate temperature secondary water inlet and the high temperature secondary water outlet are respectively communicated with the first heat exchange tube bundle, the intermediate temperature secondary water flows into the first heat exchange tube bundle through the intermediate temperature secondary water inlet for heat exchange, high temperature secondary water is formed after heat exchange, and then flows out through the high temperature secondary water outlet.
3. The heat exchange device for high-temperature primary water and low-temperature secondary water in alumina production according to claim 2, wherein: the second heat exchanger comprises a second heat exchange shell which is vertically arranged, a second heat exchange tube bundle is arranged in the second heat exchange shell, two ends of the second heat exchange shell are respectively provided with a second tube plate, the second heat exchange tube bundle is fixed in the second heat exchange shell through the second tube plates, two ends of the second heat exchange shell are respectively covered with a second end cover, the low-temperature secondary water inlet and the middle-temperature secondary water outlet are respectively arranged on the second end covers at the lower ends, and the low-temperature secondary water inlet and the middle-temperature secondary water outlet are communicated with the second heat exchange tube bundle; the low-temperature secondary water flows into a second heat exchange tube bundle through the low-temperature secondary water inlet to exchange heat, and forms intermediate-temperature secondary water after heat exchange, and then flows out through an intermediate-temperature secondary water outlet; the intermediate temperature primary water inlet and the cooling primary water outlet are respectively arranged on the second heat exchange shell, intermediate temperature primary water flows into the inner cavity of the second heat exchange shell through the intermediate temperature primary water inlet for heat exchange to form cooling primary water, and then flows out through the cooling primary water outlet.
4. A heat exchange device for high temperature primary water and low temperature secondary water in alumina production according to claim 3, wherein: two second partition plates are arranged in the second end cover at intervals vertically, so that the direction of low-temperature secondary water flow in the second heat exchange tube bundle is in a snake shape.
5. The heat exchange device for high-temperature primary water and low-temperature secondary water in alumina production according to claim 4, wherein: the first heat exchange shell, the second heat exchange shell, the first partition plate, the second partition plate, the first tube plate and the second tube plate are made of Q345R steel plates respectively.
6. A heat exchange device for high temperature primary water and low temperature secondary water in alumina production according to claim 3, wherein: the first heat exchange tube bundle and the second heat exchange tube bundle are respectively seamless steel tube manufactured pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223445586.1U CN219347470U (en) | 2022-12-22 | 2022-12-22 | High-temperature primary water and low-temperature secondary water heat exchange device in alumina production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223445586.1U CN219347470U (en) | 2022-12-22 | 2022-12-22 | High-temperature primary water and low-temperature secondary water heat exchange device in alumina production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219347470U true CN219347470U (en) | 2023-07-14 |
Family
ID=87095040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223445586.1U Active CN219347470U (en) | 2022-12-22 | 2022-12-22 | High-temperature primary water and low-temperature secondary water heat exchange device in alumina production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219347470U (en) |
-
2022
- 2022-12-22 CN CN202223445586.1U patent/CN219347470U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206352906U (en) | A kind of exhaust steam direct-absorption type lithium bromide heat pump system | |
| CN101832681A (en) | Lithium bromide refrigerating machine capable of recycling heat energy by utilizing heat pump | |
| CN101704539B (en) | Method and device for evaporating mother liquid in aluminium oxide plant | |
| CN102425958B (en) | All-welded plate shell type stainless steel condenser and application thereof | |
| CN203852856U (en) | Seven-effect and three-section evaporation indirect-condensation evaporator set for concentrated sodium aluminate solution | |
| CN209246209U (en) | Still kettle steam discharge reclaiming system for condensation heat | |
| CN203852855U (en) | Six-efficiency three-segment evaporation indirect condensation evaporator group for concentrated sodium aluminate solution | |
| CN219347470U (en) | High-temperature primary water and low-temperature secondary water heat exchange device in alumina production | |
| CN113310246A (en) | Wine condensation heat energy comprehensive utilization system and heat energy comprehensive utilization method | |
| CN107098419A (en) | A kind of solar airconditioning seawater desalination system | |
| CN212523051U (en) | Seven-effect tube plate combined falling film evaporation system for concentrating sodium aluminate solution | |
| CN109939454A (en) | A kind of heat pump vacuum concentration system | |
| CN204100841U (en) | Multi-fluid condenser | |
| CN205275221U (en) | Vapor -recovery unit of salt prunella coproduction | |
| CN212425487U (en) | MED seawater desalination system using absorption heat pump coupled evaporator | |
| CN212778057U (en) | Making wine is with unpowered self-cooling circulation system | |
| CN115108567A (en) | Energy-saving process for calcination crystallization section in soda production process by combined soda process | |
| CN209828291U (en) | Heat pump vacuum concentration system | |
| CN211876413U (en) | Super-large steam type first-class lithium bromide absorption heat pump unit arranged from top to bottom | |
| CN112811491A (en) | Device for achieving closed cycle of cleaning water in production line by refrigerating and heating negative pressure of heat pump | |
| CN220602284U (en) | Waste heat utilization system in functional sugar production | |
| CN105271308A (en) | Vapor recovery method and device for salt and sodium sulfate co-production | |
| CN215952320U (en) | Crude glycerine distillation waste heat recovery utilizes device | |
| CN213253043U (en) | Five-effect vacuum countercurrent evaporation device | |
| CN208720877U (en) | Multi-cavity integration type silicon carbide heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |