CN217844351U - Industrial multistage waste heat recovery bidirectional heat and cold supply system - Google Patents
Industrial multistage waste heat recovery bidirectional heat and cold supply system Download PDFInfo
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- CN217844351U CN217844351U CN202221882479.2U CN202221882479U CN217844351U CN 217844351 U CN217844351 U CN 217844351U CN 202221882479 U CN202221882479 U CN 202221882479U CN 217844351 U CN217844351 U CN 217844351U
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Abstract
The utility model relates to the technical field of waste heat recovery, in particular to an industrial multistage waste heat recovery bidirectional heat and cold supply system, which comprises a primary heat exchanger, a secondary heat exchanger, a tertiary heat exchanger, an air energy heat pump device and a high temperature heat pump device; the production water pipeline is connected with the heat utilization device sequentially through the primary heat exchanger, the secondary heat exchanger and the tertiary heat exchanger; the cooling water pipeline is connected with a refrigerating device sequentially through the primary heat exchanger and the high-temperature heat pump device, and the high-temperature heat pump device is connected with a heat medium end of the tertiary heat exchanger; and the heat medium end of the secondary heat exchanger is connected with an air-source heat pump device, and the air-source heat pump device is arranged in a production workshop. The utility model discloses can reduce original heat supply energy consumption of enterprise and cooling energy consumption simultaneously, promote energy efficiency, reduce enterprise's energy cost, energy-concerving and environment-protective.
Description
Technical Field
The utility model relates to a waste heat recovery technical field especially relates to an industrial multistage waste heat recovery bidirectional heating cooling system.
Background
At present, when an enterprise has a heat utilization link and a cold utilization link in a production process, the enterprise needs to utilize a self-contained boiler or municipal heating power for heat supply in order to meet the process heat utilization requirement, and meanwhile, the process cold utilization also needs a set of refrigerating system for cold supply, namely, two sets of independent cold and heat source systems are needed for heat supply and cold supply for the enterprise production. Because the production workshop environment temperature concentrated by the thermal technology is high, in order to reduce the workshop environment temperature, an enterprise needs to increase the refrigeration input on one hand, and on the other hand, the heat generated by a refrigeration system due to cold supply is wasted, so that the energy consumption and the energy cost of the enterprise are increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an industrial multistage waste heat recovery two-way heat supply cooling system to solve the aforementioned problem that exists among the prior art.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
an industrial multistage waste heat recovery bidirectional heat and cold supply system comprises a primary heat exchanger, a secondary heat exchanger, a tertiary heat exchanger, an air energy heat pump device and a high-temperature heat pump device;
the cold medium ends of the first-stage heat exchanger, the second-stage heat exchanger and the third-stage heat exchanger are sequentially connected in series, and a pipeline for production water is connected with the heat utilization device sequentially through the first-stage heat exchanger, the second-stage heat exchanger and the third-stage heat exchanger;
the heat medium end of the primary heat exchanger is connected with a cooling water pipeline, the cooling water pipeline is connected with a refrigerating device sequentially through the primary heat exchanger and the high-temperature heat pump device, and the high-temperature heat pump device is connected with the heat medium end of the tertiary heat exchanger;
and the heat medium end of the secondary heat exchanger is connected with an air-source heat pump device, and the air-source heat pump device is arranged in a production workshop.
Preferably, the air-source heat pump device is provided in a plurality of numbers, and the air-source heat pump devices are distributed and arranged in a production workshop in a serial connection and/or parallel connection mode.
Preferably, the high-temperature heat pump device and the three-stage heat exchanger are both provided in plurality, the evaporator end of the high-temperature heat pump device is connected in parallel in the cooling water pipeline, and the heat medium ends of the three-stage heat exchanger are connected in series with each other and connected in series with the condenser end of the high-temperature heat pump device to form a circulation loop.
Preferably, a standby heat source device is further arranged on the production water pipeline.
The utility model has the advantages that:
the utility model provides a two-way heat supply cooling system of industrial multistage waste heat recovery through multistage heat transfer waste heat recovery, has coupled multiple waste heat resources of enterprise and cold and hot demand, has realized two-way heat supply and cooling, heat supply, cooling simultaneously when promptly the system operation. Therefore, the system can simultaneously reduce the original heat supply energy consumption and the original cold supply energy consumption of an enterprise, improve the heat supply and cooling system capacity of the enterprise, improve the energy utilization efficiency, optimize the energy utilization structure of the enterprise, reduce the energy cost of the enterprise, reduce the emission of carbon dioxide, and has remarkable energy-saving economic and environment-friendly social benefits.
Drawings
Fig. 1 is a schematic structural diagram of an industrial multistage waste heat recovery bidirectional heating and cooling system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an industrial multi-stage waste heat recovery bidirectional heating and cooling system according to another embodiment of the present invention;
in the figure: 1-a first-stage heat exchanger, 2-a second-stage heat exchanger, 3-a third-stage heat exchanger, 4-an air energy heat pump device, 5-a high-temperature heat pump device, 6-a production water pipeline, 7-a cooling water pipeline, 8-a circulating pump, 9-a hot water tank, 10-a cooling tower and 11-an air compressor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the utility model provides a schematic structural diagram of an industrial multistage waste heat recovery bidirectional heat and cold supply system, which comprises a first-stage heat exchanger 1, a second-stage heat exchanger 2, a third-stage heat exchanger 3, an air energy heat pump device 4 and a high-temperature heat pump device 5; the cold medium ends of the primary heat exchanger 1, the secondary heat exchanger 2 and the tertiary heat exchanger 3 are sequentially connected in series, and a production water pipeline 6 is connected with a heat utilization device sequentially through the primary heat exchanger 1, the secondary heat exchanger 2 and the tertiary heat exchanger 3; the heat medium end of the primary heat exchanger 1 is connected with a cooling water pipeline 7, the cooling water pipeline 7 is connected with a refrigerating device sequentially through the primary heat exchanger 1 and the high-temperature heat pump device 5, and the high-temperature heat pump device 5 is connected with the heat medium end of the tertiary heat exchanger 3; and the heat medium end of the secondary heat exchanger 2 is connected with an air-source heat pump device 4, and the air-source heat pump device 4 is arranged in a production workshop.
The devices and apparatuses used in this embodiment may all adopt industrial conventional apparatuses according to actual needs, for example: the first-stage heat exchanger 1, the second-stage heat exchanger 2 and the third-stage heat exchanger 3 can use plate heat exchangers and the like; the heat utilization device can be a production device which needs hot water for production, and can also be a hot water tank for storing the hot water, and the like; the refrigeration device may be a cooling tower or the like.
In this embodiment, this system refrigerates simultaneously and the heat supply, and the heat that produces through fully retrieving factory building environment and cooling water on the one hand supplies heat, reduces the heat supply energy consumption, and the cold water that provides simultaneously can also improve current cooling system ability to realize the interior environment cooling of factory building.
Specifically, through a primary heat exchanger 1, the production water is heated from 10-15 ℃ to 25-30 ℃ by utilizing the cooling water produced and used by enterprises, and the temperature of the cooling water is reduced; the air energy heat pump device 4 is used for absorbing heat in ambient air of a production workshop, the water for production is heated from 25-30 ℃ to 45-50 ℃ through the secondary heat exchanger 2, and the temperature of a workshop is reduced to replace an original electric refrigerator for refrigeration and energy supply; the high-temperature heat pump device 5 is used for absorbing the waste heat of the cooling water, the production water is heated to 80 ℃ or higher from 45-50 ℃ through the three-stage heat exchanger 3, the production hot water is provided to replace an original heat source system, meanwhile, the temperature of the cooling water is further reduced, and the function of a cooling tower is partially replaced.
The utility model discloses a multistage heat transfer waste heat recovery has coupled multiple waste heat resources of enterprise and cold and hot demand, has realized two-way heat supply and cooling, can reduce original heat supply energy consumption of enterprise and cooling energy consumption simultaneously, improves heat supply and the cooling system ability of enterprise, promotes energy utilization efficiency, optimizes the energy utilization structure of enterprise, reduces the energy cost of enterprise, reduces the carbon dioxide emission.
The solution of the present invention will be further explained with reference to specific implementation scenarios.
The fruit juice beverage producing enterprise needs to heat purified water for production from 15 ℃ to 80 ℃, the original heat source is a natural gas steam boiler, the cold source is a centralized electric refrigerator and a dispersed cabinet air conditioner in a workshop, under the condition that the central air conditioner refrigerator and the cabinet air conditioner are fully started and run at full load, the average temperature in the workshop is more than 38 ℃, the maximum temperature is more than 40 ℃, and the temperature difference with the ideal working environment temperature of people, namely 28 ℃, is 10-12 ℃, so that the effective working time of workers is shortened or the working efficiency is reduced. The part of hot air not only increases the refrigeration energy consumption of the air conditioner, but also has the value of recycling a large amount of sensible heat contained in the air.
Enterprise workshops have both cooling and heating requirements. Heat sources in the current production process link all consume a large amount of natural gas heating process hot water, canning refrigeration and environmental refrigeration all adopt an electric refrigeration mode, and cooling water dissipates heat to the atmosphere through a cooling tower. The water supply temperature and the water return temperature of cooling water of an enterprise are respectively 35-30 ℃ in summer and 25-20 ℃ in winter, and if the waste heat generated in the refrigeration process is fully recovered for heat supply, the consumption of natural gas can be greatly reduced, the energy cost of the enterprise is reduced, and the unit consumption of products is reduced. Namely, the waste heat of high-temperature air in the factory building is recycled, the environmental temperature of the factory building is reduced, and simultaneously the heat is used for preparing high-temperature hot water required by production; the low-temperature waste heat of the cooling water of the cooling tower is recovered, and the low-temperature waste heat is used for preparing high-temperature hot water required by production while improving the refrigeration capacity of the cooling tower and reducing the energy consumption of a main machine of the cooling tower.
As shown in fig. 2, in this embodiment, hot air heat recovery and cooling water waste heat recovery of a summer plant are realized through a primary heat exchanger 1, an air source heat pump device 4 and a high-temperature heat pump device 5, and the temperature of the process water is raised to 80 ℃ through three-stage heat exchange, and the process water is supplied to a hot water tank 9. Wherein, the first-stage heat exchange is the heat exchange between the process water and the cooling water output by the air compressor 11, so that the load of the cooling tower 10 is reduced; the second-stage heat exchange is that the production water exchanges heat with the air source heat pump device 4, and the air source heat pump device 4 reduces the temperature of a workshop while heating, so as to refrigerate the workshop; the third stage of heat exchange is to utilize circulating water with the temperature of 85 ℃ produced at the condenser end of the high-temperature heat pump device 5 to increase the temperature of the process water subjected to the first two stages of heat exchange to 80 ℃, and simultaneously, the evaporator end of the high-temperature heat pump device 5 reduces the temperature of cooling water and reduces the load of the cooling tower 10.
In this embodiment, in order to meet the requirements of a large workshop, a plurality of air-source heat pump devices 4 can be arranged according to actual needs, and are distributed in the production workshop in a series and/or parallel connection manner. In order to ensure the three-stage heat exchange effect, the high-temperature heat pump device 5 and the three-stage heat exchanger 3 can be arranged in a plurality of numbers, the evaporator end of the high-temperature heat pump device 5 is connected in parallel in the cooling water pipeline 7, and the heat medium end of the three-stage heat exchanger 3 is connected in series and is connected in series with the condenser end of the high-temperature heat pump device 5 to form a circulation loop.
After the implementation of the embodiment, the steam heat source required by the original process flow can be replaced, and the gas-steam boiler is used as a standby heat source for the production of the process flow or is used in parallel with the high-temperature heat pump system in the production peak period to serve as a bidirectional guarantee, so that the supply guarantee rate of the production process is ensured to be 100%.
By applying the technology, the consumption of natural gas of a boiler and the power consumption of a cold machine are reduced, and 300 ten thousand Nm of natural gas can be saved all the year round 3 The electric quantity of the refrigerator is saved by 25 thousands kWh, 28000 tons of purified water are saved, the electricity price is 0.75 yuan/kWh, and the natural gas price is 3.5 yuan/Nm 3 In terms of annual energy-saving yield of 650 ten thousand yuan, 2200 tons of coal in the whole year, and 3600 tons of emission-reduced carbon dioxide, and the method has obvious energy-saving economic and environment-friendly social benefits.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (4)
1. An industrial multistage waste heat recovery bidirectional heat and cold supply system is characterized by comprising a primary heat exchanger, a secondary heat exchanger, a tertiary heat exchanger, an air energy heat pump device and a high-temperature heat pump device;
the cold medium ends of the first-stage heat exchanger, the second-stage heat exchanger and the third-stage heat exchanger are sequentially connected in series, and a pipeline for production water is connected with the heat utilization device sequentially through the first-stage heat exchanger, the second-stage heat exchanger and the third-stage heat exchanger;
the heat medium end of the primary heat exchanger is connected with a cooling water pipeline, the cooling water pipeline is connected with a refrigerating device sequentially through the primary heat exchanger and the high-temperature heat pump device, and the high-temperature heat pump device is connected with the heat medium end of the tertiary heat exchanger;
and the heat medium end of the secondary heat exchanger is connected with an air-source heat pump device, and the air-source heat pump device is arranged in a production workshop.
2. The industrial multi-stage waste heat recovery bidirectional heating and cooling system as claimed in claim 1, wherein the air-source heat pump device is provided in plurality, and the air-source heat pump device is distributed in the production workshop in a serial and/or parallel connection manner.
3. The industrial multi-stage waste heat recovery bidirectional heating and cooling system according to claim 1, wherein the high-temperature heat pump device and the tertiary heat exchanger are provided in plurality, an evaporator end of the high-temperature heat pump device is connected in parallel in the cooling water pipeline, and heat medium ends of the tertiary heat exchanger are connected in series with each other and connected in series with a condenser end of the high-temperature heat pump device to form a circulation loop.
4. The industrial multi-stage waste heat recovery bidirectional heating and cooling system as claimed in claim 1, wherein a standby heat source device is further disposed on the production water pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221882479.2U CN217844351U (en) | 2022-07-20 | 2022-07-20 | Industrial multistage waste heat recovery bidirectional heat and cold supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221882479.2U CN217844351U (en) | 2022-07-20 | 2022-07-20 | Industrial multistage waste heat recovery bidirectional heat and cold supply system |
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| CN217844351U true CN217844351U (en) | 2022-11-18 |
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| CN202221882479.2U Active CN217844351U (en) | 2022-07-20 | 2022-07-20 | Industrial multistage waste heat recovery bidirectional heat and cold supply system |
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- 2022-07-20 CN CN202221882479.2U patent/CN217844351U/en active Active
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