CN211739979U - Salt manufacturing trade waste heat recovery system - Google Patents
Salt manufacturing trade waste heat recovery system Download PDFInfo
- Publication number
- CN211739979U CN211739979U CN202021795584.3U CN202021795584U CN211739979U CN 211739979 U CN211739979 U CN 211739979U CN 202021795584 U CN202021795584 U CN 202021795584U CN 211739979 U CN211739979 U CN 211739979U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- output end
- input end
- brine
- salt
- 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
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The utility model discloses a waste heat recovery system in salt manufacturing industry, which comprises a brine pump, a condensate pump and a plurality of heat exchangers; the system is characterized in that the output end of an atmospheric condenser in the salt making equipment is respectively connected with the upper input end of each heat exchanger through a condensate pump, and the lower output end of each heat exchanger is connected with the input end of an air cooling tower in the salt making equipment; the heat exchangers are connected in sequence, and the side output end of the previous heat exchanger is connected with the side input end of the next heat exchanger; the output end of a refined brine barrel in the salt making equipment is connected with the side input end of the heat exchanger at one end through a brine pump; the side output end of the heat exchanger at the other end is connected with the input end of a brine storage tank in the salt making equipment. The system can recycle the low-grade waste heat in the condensed water after multi-effect evaporation so as to solve the problems of heat waste and excessive power consumption caused by direct cooling of the condensed water.
Description
Technical Field
The utility model belongs to the technical field of industry waste heat recovery, concretely relates to salt manufacturing trade waste heat recovery system.
Background
At present, salt manufacturing plants mainly manufacture salt by a multi-effect evaporation process method, secondary steam after multi-effect evaporation directly contacts cooling water in a mixing condenser to be cooled to form condensed water, and the temperature of the condensed water can reach more than 50 ℃. This comdenstion water is because the higher unable next process that directly gets into of temperature utilizes, consequently need through air cooling tower cooling to 35 ℃ and just can get into next process below, if the comdenstion water directly can lead to the waste heat in the comdenstion water directly to scatter and disappear to the atmosphere through the cooling of air cooling tower, has also improved the cooling blower's of air cooling tower power consumption moreover to a certain extent, causes the energy waste.
At present, most of salt making processes are that refined brine from a brine purification workshop enters a refined brine barrel, is mixed and pressurized with filtrate from a salt making centrifuge, then is preheated in multiple effects through a preheater, and finally enters a salt making evaporation tank for evaporation and crystallization to prepare salt.
In view of this, the utility model provides a waste heat recovery system on the basis that does not change current salt manufacturing technology, utilizes waste heat recovery system to retrieve the low-grade waste heat in the condensate water, and the heat of retrieving preheats the refined brine that comes from the refined brine bucket, avoids the heat directly to scatter and disappear.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to solve the problem of providing a waste heat recovery system in salt manufacturing industry; the system can recycle the low-grade waste heat in the condensed water after multi-effect evaporation so as to solve the problems of heat waste and excessive power consumption caused by direct cooling of the condensed water.
The utility model provides a technical scheme that technical problem adopted is:
a waste heat recovery system in salt manufacturing industry comprises a brine pump, a condensate pump and a plurality of heat exchangers; the system is characterized in that the output end of an atmospheric condenser in the salt making equipment is respectively connected with the upper input end of each heat exchanger through a condensate pump, and the lower output end of each heat exchanger is connected with the input end of an air cooling tower in the salt making equipment; the heat exchangers are connected in sequence, and the side output end of the previous heat exchanger is connected with the side input end of the next heat exchanger; the output end of a refined brine barrel in the salt making equipment is connected with the side input end of the heat exchanger at one end through a brine pump; the side output end of the heat exchanger at the other end is connected with the input end of a brine storage tank in the salt making equipment.
The system also comprises two bypass pipelines, wherein one bypass pipeline is connected with the output end of the atmospheric condenser and the input end of the air cooling tower through one valve, and the other bypass pipeline is connected with the output end of the refined brine barrel and the input end of the brine storage tank through the other valve.
The system is provided with monitoring devices on an output end pipeline of a refined brine barrel, an input end pipeline of a brine storage tank, a pipeline between two adjacent heat exchangers, an output end pipeline of an atmospheric condenser and an input end pipeline of an air cooling tower.
The monitoring device comprises a flow sensor, a temperature sensor and a pressure gauge.
The model of the flow sensor is SF-CSBR1000/DN250, the model of the temperature sensor is pt100, and the pressure gauge adopts a conventional spring type pressure gauge.
The models of the heat exchangers are BEM 1100-0.1-256-6.0/38-2I.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the waste heat recovery system realizes energy conservation and consumption reduction of the salt making process only by recovering and recycling the waste heat of the condensed water on the basis of not changing the existing salt making process. On one hand, condensed water generated by multi-effect evaporation is subjected to heat exchange through the heat exchanger, waste heat in the condensed water is stored in the heat exchanger, and the air cooling tower is used for cooling the condensed water subjected to heat exchange, so that the power consumption of the air cooling tower is reduced, and the production cost is reduced; on the other hand, the low-temperature refined brine sequentially passes through all the heat exchangers and exchanges heat with all the heat exchangers, so that the low-temperature refined brine is preheated, the coal consumption in the salt making process is saved, and the production cost of the salt making process is further reduced.
(2) The waste heat recovery system is used for efficiently recycling the waste heat of the condensed water generated in the salt manufacturing industry, has the advantages of scientific and reasonable flow design, simple process and high efficiency, and is suitable for popularization and application; by fully utilizing the heat energy of the condensed water, not only can the resource be recycled, but also the energy consumption in the production process can be reduced, and the effects of clean production, energy conservation and consumption reduction are achieved; the system can also reduce the production cost of enterprises, improve the competitiveness of the enterprises and realize better economic benefit and environmental benefit.
Drawings
FIG. 1 is a schematic diagram of the present invention;
in the figure, 1, a primary heat exchanger; 2. a secondary heat exchanger; 3. a tertiary heat exchanger; 4. a four-stage heat exchanger; 5. a brine storage tank; 6. a refined brine barrel; 7. an atmospheric condenser; 8. an air cooling tower; 9. a brine pump; 10. a condensate pump; 11. a first valve; 12. a second valve; 13. a third valve; 14. a fourth valve; 15. a fifth valve; 16. and a sixth valve.
Detailed Description
The present invention will be further explained with reference to the following embodiments and accompanying drawings. The specific embodiments are only used for further elaboration of the invention, and do not limit the scope of protection of the claims of the present application.
The utility model provides a salt manufacturing industry waste heat recovery system (for short, see fig. 1), including first-level heat exchanger 1, second grade heat exchanger 2, tertiary heat exchanger 3, level four heat exchanger 4, brine pump 9, condensate pump 10, first valve 11, second valve 12, third valve 13 and fourth valve 14;
the output end of the atmospheric condenser 7 passes through a condensate water pump 10 and a second valve 12 and then is respectively connected with the upper input ends of the first-stage heat exchanger 1, the second-stage heat exchanger 2, the third-stage heat exchanger 3 and the fourth-stage heat exchanger 4, and the lower output ends of the first-stage heat exchanger 1, the second-stage heat exchanger 2, the third-stage heat exchanger 3 and the fourth-stage heat exchanger 4 pass through a fourth valve 14 and are connected with the input end of the air cooling tower 8; the output end of the refined brine barrel 6 is connected with the side input end of the primary heat exchanger 1 through a brine pump 9 and a first valve 11; the side output end of the first-stage heat exchanger 1 is connected with the side input end of the second-stage heat exchanger 2, the side output end of the second-stage heat exchanger 2 is connected with the side input end of the third-stage heat exchanger 3, the side output end of the third-stage heat exchanger 3 is connected with the side input end of the fourth-stage heat exchanger 4, and the side output end of the fourth-stage heat exchanger 4 passes through the third valve 13 and is connected with the input end of the brine storage tank 5;
The system also comprises two bypass pipelines, wherein one bypass pipeline is connected with the output end of the atmospheric condenser 7 and the input end of the air cooling tower 8 through a sixth valve 16, and the other bypass pipeline is connected with the output end of the refined brine barrel 6 and the input end of the brine storage tank 5 through a fifth valve 15; when brine storage tank 5, refined brine bucket 6, atmospheric condenser 7 or air cooling tower 8 need the maintenance, the accessible closes corresponding valve and guarantees that original system is not influenced, continues production.
The primary heat exchanger 1, the secondary heat exchanger 2, the tertiary heat exchanger 3 and the quaternary heat exchanger 4 are all shell-and-tube heat exchangers, and BEM type heat exchangers in TEMA (American society for tubular Heat exchanger manufacturers) are adopted to improve the heat exchange capacity; in the embodiment, all the heat exchangers are BEM1100-0.1-256-6.0/38-2I in model and are made of corrosion-resistant 316L stainless steel.
In the embodiment, the temperature of condensed water discharged by the atmospheric condenser 7 is more than or equal to 50 ℃ and the pressure is less than or equal to 0.2MPa, and after the condensed water is cooled by the air cooling tower 8, the temperature of the condensed water is less than or equal to 35 ℃ and the pressure is less than or equal to 0.2 MPa; the temperature of the brine in the brine refining barrel 6 is less than or equal to 15 ℃, the pressure is less than or equal to 0.1MPa, the temperature of the brine entering the brine storage tank 5 is more than or equal to 40 ℃, and the pressure is less than or equal to 0.1 MPa.
The system is characterized in that monitoring devices are arranged on an output end pipeline of a refined brine barrel 6, an input end pipeline of a brine storage tank 5, a pipeline between two adjacent heat exchangers, an output end pipeline of an atmospheric condenser 7 and an input end pipeline of an air cooling tower 8; the monitoring device comprises a flow sensor, a temperature sensor and a pressure gauge and is used for monitoring the flow, temperature and pressure parameters of each pipeline in real time, so that the management of the whole system is facilitated, and the stable and efficient operation of the system is guaranteed; in the embodiment, the model of the flow sensor is SF-CSBR1000/DN 250; the model of the temperature sensor is pt 100; the pressure gauge adopts a conventional spring type pressure gauge; all valves adopt butterfly valves, and the model number is DN 200-400.
The utility model discloses a theory of operation and work flow are:
when the waste heat recovery system is normally used, the fifth valve 15 and the sixth valve 16 are closed; when waste heat recovery is carried out, the second valve 12 and the fourth valve 14 are opened, and the first valve 11 and the third valve 13 are closed; condensed water discharged from the atmospheric condenser 7 enters each heat exchanger under the action of a condensed water pump 10, heat exchange is carried out on the condensed water in the heat exchangers, waste heat is stored in each heat exchanger, the condensed water after heat exchange is discharged from each heat exchanger and then enters an air cooling tower 8 to be cooled and discharged, and waste heat recovery of the condensed water after multi-effect evaporation in the salt manufacturing industry is realized;
when the waste heat is recycled, the first valve 11 and the third valve 13 are opened, and the second valve 12 and the fourth valve 14 are closed; the low-temperature brine in the refined brine barrel 6 sequentially passes through the heat exchangers under the action of the brine pump 9, is subjected to heat exchange with the heat exchangers to form high-temperature brine, and finally enters the brine storage tank 5, so that the waste heat of the condensed water after multi-effect evaporation in the salt manufacturing industry is recycled.
The second valve 12 and the sixth valve 16 are closed, and the atmospheric condenser 7 can be repaired; the fourth valve 14 and the sixth valve 16 are closed, and the air cooling tower 8 can be maintained; the first valve 11 and the fifth valve 15 are closed, and the refined brine barrel 6 can be maintained; the third valve 13 and the fifth valve 15 are closed, and the brine storage tank 5 can be repaired.
The above-mentioned processes of waste heat recovery and recycling can be performed simultaneously, i.e. the first valve 11, the second valve 12, the third valve 13 and the fourth valve 14 are opened simultaneously.
In order to verify the effectiveness of the system, through the analysis of practical project operation data, the waste heat recovery system can reduce the water temperature of high-temperature condensed water from about 50 ℃ to about 45 ℃, and the temperature of low-temperature brine of 400 tons/hour is increased from about 15 ℃ to about 40 ℃; as shown in the formula (1), the temperature of the low-temperature brine of 400 tons/h is increased from about 15 ℃ to about 40 ℃ through the waste heat recovery system, and the standard coal can be saved by 1.09 (t/h).
Q＝C*m*Δt＝3.2*400*1000*(40-15)/29307＝1.09(t/h) (1)
Wherein C represents the specific heat capacity of the brine and has the unit of kJ/(kg DEG C); m represents the flow rate, and the unit is kg/h; Δ t represents the heat transfer temperature difference in units of ℃; 29307 represents the standard coal calorific value, in kJ/kg; 1000 represents unit conversion;
compared with the mode of directly cooling the condensed water in the prior art, the method has the advantages that the 50 ℃ high-temperature condensed water produced by the salt making process is subjected to waste heat recovery through the waste heat recovery system, and finally, the standard coal can be saved by 1.09 tons/hour; the price of 1 ton of coal is 509.91 yuan/ton calculated according to the conversion of the heat value of the standard coal, and the system operates for 7000 hours in one year, so that the waste heat recovery system can save 389 ten thousand yuan for enterprises every year, and the energy-saving and consumption-reducing benefits are very obvious; meanwhile, the steam consumption for brine preheating is reduced to the maximum extent, so that the salt production cost can be reduced, and the market competitiveness of an enterprise is improved; in addition, the power consumption of a fan of the air cooling tower can be reduced, the heat of condensed water is fully utilized, clean production is realized, and then the environment is protected, and the environmental pollution is reduced.
The utility model discloses the nothing is mentioned the part and is applicable to prior art.
Claims (6)
1. A waste heat recovery system in salt manufacturing industry comprises a brine pump, a condensate pump and a plurality of heat exchangers; the system is characterized in that the output end of an atmospheric condenser in the salt making equipment is respectively connected with the upper input end of each heat exchanger through a condensate pump, and the lower output end of each heat exchanger is connected with the input end of an air cooling tower in the salt making equipment; the heat exchangers are connected in sequence, and the side output end of the previous heat exchanger is connected with the side input end of the next heat exchanger; the output end of a refined brine barrel in the salt making equipment is connected with the side input end of the heat exchanger at one end through a brine pump; the side output end of the heat exchanger at the other end is connected with the input end of a brine storage tank in the salt making equipment.
2. The salt manufacturing industry waste heat recovery system of claim 1, further comprising two bypass lines, wherein one bypass line is connected with the output end of the atmospheric condenser and the input end of the air cooling tower through one valve, and the other bypass line is connected with the output end of the refined brine barrel and the input end of the brine storage tank through the other valve.
3. The salt manufacturing industry waste heat recovery system according to claim 1, wherein the system is provided with monitoring devices on an output end pipeline of the refined brine barrel, an input end pipeline of the brine storage tank, a pipeline between two adjacent heat exchangers, an output end pipeline of the atmospheric condenser and an input end pipeline of the air cooling tower.
4. The salt manufacturing industry waste heat recovery system of claim 3, wherein the monitoring device comprises a flow sensor, a temperature sensor, and a pressure gauge.
5. The salt manufacturing industry waste heat recovery system according to claim 4, wherein the type of the flow sensor is SF-CSBR1000/DN250, the type of the temperature sensor is pt100, and the pressure gauge is a spring-type pressure gauge.
6. The salt industry waste heat recovery system of claim 1, wherein each heat exchanger is BEM1100-0.1-256-6.0/38-2I in type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021795584.3U CN211739979U (en) | 2020-08-25 | 2020-08-25 | Salt manufacturing trade waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021795584.3U CN211739979U (en) | 2020-08-25 | 2020-08-25 | Salt manufacturing trade waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211739979U true CN211739979U (en) | 2020-10-23 |
Family
ID=72846673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021795584.3U Active CN211739979U (en) | 2020-08-25 | 2020-08-25 | Salt manufacturing trade waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211739979U (en) |
-
2020
- 2020-08-25 CN CN202021795584.3U patent/CN211739979U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105444247B (en) | Regional energy supply system based on comprehensive recycling of various low-grade waste heat | |
| CN211739979U (en) | Salt manufacturing trade waste heat recovery system | |
| CN213687977U (en) | Novel high-temperature waste gas treatment and waste heat recovery system | |
| CN203820803U (en) | Blast furnace slag flushing water residual heat recovery device | |
| CN202119095U (en) | Waste heat recovery and heat exchange device | |
| CN201574791U (en) | Heat pump combined circulating system of small steam turbine | |
| CN103572328B (en) | A kind of device reclaiming aluminum electrolysis technology low-temperature flue gas waste heat heat energy | |
| CN216487339U (en) | Nuclear power station waste heat energy storage and distribution recycling system | |
| CN215655068U (en) | Salt melting system of molten salt thermal energy storage power station | |
| CN202692728U (en) | Waste heat utilization system of calcination furnace | |
| CN201309840Y (en) | Improved stripping tower bottom purified water heat-exchange system of sewage stripping device | |
| CN113214846A (en) | Coking raw gas waste heat recovery system | |
| CN114963691A (en) | Low pressure CO 2 Low-temperature gas separation method and device | |
| CN113464925A (en) | Pharmaceutical factory steam condensate and comprehensive utilization system that floods with gas | |
| CN209959303U (en) | Internal combustion engine waste heat steam supplementing type power generation system | |
| CN112441690A (en) | RO seawater desalination device inlet seawater heating system based on waste heat recovery of thermal power generating unit | |
| CN113274949A (en) | Salt melting system of molten salt thermal energy storage power station | |
| CN202470027U (en) | Low-temperature flue gas heat recovery and utilization system | |
| CN111396160A (en) | Flue gas waste heat cogeneration system and cogeneration method | |
| CN220567337U (en) | Comprehensive utilization system for citric acid waste low-temperature heat source | |
| CN207862375U (en) | Blast furnace slag quenching water waste heat recovery reutilization system | |
| CN215799307U (en) | Coking raw gas waste heat recovery system | |
| CN218435045U (en) | System for utilize alkali-containing rainwater washing red mud | |
| CN113899235B (en) | Kitchen waste pretreatment waste heat recycling method and recycling system | |
| CN213238482U (en) | Unpowered waste heat utilization structure of sintering circular cooler low-temperature section flue gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |