CN210292425U - Sensible heat recovery device of refrigerating system - Google Patents
Sensible heat recovery device of refrigerating system Download PDFInfo
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- CN210292425U CN210292425U CN201920876538.7U CN201920876538U CN210292425U CN 210292425 U CN210292425 U CN 210292425U CN 201920876538 U CN201920876538 U CN 201920876538U CN 210292425 U CN210292425 U CN 210292425U
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- 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
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- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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Abstract
The utility model relates to a sensible heat recovery device of a refrigerating system, which comprises a shell and tube heat exchanger, a water purification tank and a circulating water pump, wherein the shell and tube heat exchanger is provided with a water purification inlet, a water purification outlet, a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is communicated with a compressor outlet of the refrigerating system, and the refrigerant outlet is communicated with a condenser inlet of the refrigerating system; the water purifying tank is provided with a water inlet and a water outlet; the water inlet is connected with a purified water outlet of the shell-and-tube heat exchanger, and the water outlet is connected with a purified water inlet of the shell-and-tube heat exchanger; and the circulating water pump is connected between the water outlet of the water purifying tank and the purified water inlet of the shell-and-tube heat exchanger. The utility model discloses an adjustment low boiling point liquid refrigerant's flow direction carries heat energy to utilize the sensible heat of compressor output through shell and tube heat exchanger heat transfer, has realized using the electric energy to be one-way energy consumption, the two-way efficiency output of refrigeration heating.
Description
Technical Field
The utility model relates to a refrigeration plant technical field, concretely relates to refrigerating system's sensible heat recovery unit.
Background
The low-temperature processing processes of low-temperature refrigeration, low-temperature freezing storage and the like are important links in the processes of food preservation, processing, storage and transportation. At present, quick-frozen food production enterprises widely use equipment such as a refrigerator, a fresh-keeping warehouse, an emergency freezer, a quick freezer and the like to carry out refrigeration, fresh keeping, freezing and freezing on raw materials and products in the production process. Wherein SB/T11073 'term for quick-frozen food' indicates that quick freezing refers to the process of rapidly passing the frozen product through the maximum ice crystal region to make the heat center temperature reach-18 ℃ and below. The refrigeration equipment is used at high frequency in modern large-scale food processing enterprises, and the auxiliary energy-saving method and equipment development of the refrigeration equipment have positive environmental protection effects on green and low-consumption production of the modern large-scale food processing enterprises.
The vapor compression type refrigeration technology which adopts a low-boiling point liquid refrigerant (such as chlorodifluoromethane) as a refrigerant utilizes the characteristic that the low-boiling point liquid refrigerant can still absorb heat and be vaporized even in a low-temperature environment, so that the temperature of an environment medium is reduced, and the refrigeration effect is achieved. The vapor compression type refrigerating system consists of 4 main parts, namely a compressor, a condenser, a throttling device and an evaporator, which are sequentially connected by pipelines to form a completely closed system, and a working medium (a low-boiling-point liquid refrigerant) circulates in a fluid state in the closed refrigerating system, continuously absorbs heat from the evaporator through phase change, and emits heat in the condenser to achieve the refrigerating effect. Single-stage compression is generally adopted in cold storages, fresh-keeping storages and the like, and double-stage compression is generally adopted in quick-freezing storages, quick-freezing machines and constant-speed freezing and refrigerating systems to obtain low-temperature environments of-42 ℃ or lower.
In the 'cold production' process of the steam compression refrigeration, as the energy conservation and transfer process, the steam compression refrigeration equipment continuously obtains a low-temperature cold source and simultaneously continuously generates a high-temperature heat source. The application group of a plurality of high-frequency refrigeration devices such as a modern large-scale food processing enterprise has positive social significance under the social big environment that resources are short, energy is deficient and environmental protection becomes the main stream of continuous development, whether a high-temperature heat source generated by vapor compression refrigeration can be fully utilized.
SUMMERY OF THE UTILITY MODEL
To the above problem, an object of the utility model is to provide a refrigerating system's sensible heat recovery unit, its sensible heat with the refrigerating system output utilizes as the high temperature heat source to the electric energy is one-way energy consumption, realizes the two-way energy efficiency output of refrigeration, heating.
In order to achieve the above object, the utility model adopts the following technical scheme:
a sensible heat recovery device of a refrigerating system comprises a shell and tube heat exchanger, a water purification tank and a circulating water pump, wherein the shell and tube heat exchanger is provided with a water purification inlet, a water purification outlet, a refrigerant inlet and a refrigerant outlet, the refrigerant inlet is communicated with an outlet of a compressor of the refrigerating system, and the refrigerant outlet is communicated with an inlet of a condenser of the refrigerating system; the water purifying tank is provided with a water inlet and a water outlet; the water inlet is connected with a purified water outlet of the shell-and-tube heat exchanger, and the water outlet is connected with a purified water inlet of the shell-and-tube heat exchanger; and the circulating water pump is connected between the water outlet of the water purifying tank and the purified water inlet of the shell-and-tube heat exchanger.
The shell-tube heat exchanger comprises a shell, partition plates arranged at two ends of the shell, a heat exchange pipeline and a shell side guide plate, wherein the heat exchange pipeline and the shell side guide plate are arranged in the shell; the water purification inlet and the water purification outlet are arranged on the side wall of the shell, the heat exchange tube is arranged between the clapboards at the two ends of the shell, the upper end of the heat exchange tube is communicated with the refrigerant inlet, and the lower end of the heat exchange tube is communicated with the refrigerant outlet.
And the shell pass guide plate of the shell-and-tube heat exchanger is vertically arranged.
And the refrigerant outlet at the lower end of the shell and tube heat exchanger is higher than the center height of the condenser inlet by more than 500 cm.
And the purified water outlet of the shell and tube heat exchanger is positioned above the purified water inlet.
The shell and tube heat exchanger is a shell and tube heat exchanger.
After the scheme of the invention is adopted, the utility model discloses link shell and tube heat exchanger, water purification case and circulating water pump together and form sensible heat recovery unit to establish ties its shell and tube heat exchanger between refrigerating system's compressor and condenser, adjust the flow direction of low boiling point liquid refrigerant, carry heat energy to utilize the sensible heat of compressor output through shell and tube heat exchanger heat transfer, realized using the electric energy as one-way energy consumption, the two-way efficiency output of refrigeration heating.
Refrigerating system installation the utility model discloses a behind the sensible heat recovery unit, increase in other words and evaporate cold condensation area and carry out the precooling, system's condensing pressure has reduction by a wide margin with condensing temperature, and condenser operating time shortens. The reduction of the condensation temperature also improves the operation efficiency of the refrigerating system, so that the energy efficiency ratio of the refrigerating system is greatly improved, and the freezing quality and the freezing quantity of the product have obvious advantages compared with the product without the heat recovery equipment.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is the structural schematic diagram of the shell-and-tube heat exchanger of the present invention.
Detailed Description
As shown in fig. 1, the utility model discloses a sensible heat recovery device of a refrigeration system, which comprises a shell-and-tube heat exchanger 11, a purified water tank 12 and a circulating water pump 13, wherein the shell-and-tube heat exchanger 11 is provided with a purified water inlet 113, a purified water outlet 114, a refrigerant inlet 111 and a refrigerant outlet 112, and the purified water tank 12 is provided with a water inlet 121 and a water outlet 122; the shell and tube heat exchanger 11 is connected between a compressor 20 and a condenser 30 of the refrigeration system through a heat preservation pipeline, wherein a refrigerant inlet 111 of the shell and tube heat exchanger 11 is communicated with an outlet 21 of the compressor 20, and a refrigerant outlet 112 is communicated with an inlet 31 of the condenser 30; a water inlet 121 of the water purifying tank 12 is connected with a purified water outlet 114 of the shell-and-tube heat exchanger 11, and a water outlet 122 is connected with a purified water inlet 113 of the shell-and-tube heat exchanger 11; and the circulating water pump 13 is connected between the water outlet 122 of the clean water tank 12 and the clean water inlet 113 of the shell-and-tube heat exchanger 11.
As shown in fig. 2, the shell-and-tube heat exchanger 11 includes a shell 115, partitions 116 disposed at two ends of the shell 115, and a heat exchange pipe 117 and a shell-side baffle 118 disposed in the shell 115, wherein the refrigerant inlet 111 is disposed at an upper end of the shell 115, the refrigerant outlet 112 is disposed at a lower end of the shell 115, and a tube side of the shell-and-tube heat exchanger 11 is formed between the refrigerant inlet 111 and the refrigerant outlet 112; the purified water inlet 113 and the purified water outlet 114 are arranged on the side wall of the shell 115, and a shell pass of the shell-and-tube heat exchanger 11 is formed between the purified water inlet 113 and the purified water outlet 114; a heat exchange tube 117 is disposed between the partitions 116 at both ends of the casing 115, and the heat exchange tube 117 has an upper end communicating with the refrigerant inlet 111 and a lower end communicating with the refrigerant outlet 112.
The low-boiling-point liquid refrigerant in the compressor 20 of the refrigeration system is in a gaseous state at a high temperature, flows into the heat exchange tube 117 of the shell-and-tube heat exchanger 11 from the refrigerant inlet 111 at the upper end of the shell-and-tube heat exchanger 11, passes through the tube pass inside the shell-and-tube heat exchanger 11, is cooled and cooled by the low-temperature purified water in the shell pass of the shell-and-tube heat exchanger 11, and after being cooled in the shell-and-tube heat exchanger 11, flows out from the refrigerant outlet 112 at the lower end of the shell-and-tube heat exchanger 11, enters the condenser 30 to be continuously cooled to a liquid state. The low-temperature purified water is provided by the purified water tank 12 and the circulating water pump 13, the circulating water pump 13 pumps the low-temperature purified water in the purified water tank 12 to the shell pass of the shell-and-tube heat exchanger 11 along the pipeline, the low-temperature purified water absorbs the heat energy of the high-temperature low-boiling-point liquid refrigerant in the heat exchange pipeline 117 in the conveying process, finally returns to the purified water tank 12 through the purified water outlet 114 of the shell-and-tube heat exchanger 11, and the temperature of the low-temperature purified water in the purified water tank is gradually increased in a circulating reciprocating mode.
In order to prevent the low-boiling-point liquid refrigerant from being liquefied and accumulated inside the shell-and-tube heat exchanger 11, the shell-side flow guide plate 118 of the shell-and-tube heat exchanger 11 is vertically arranged, so that pressure drop caused by the liquefaction and accumulation of the low-boiling-point liquid refrigerant is avoided.
In order to liquefy, accumulate and discharge the low-boiling-point liquid refrigerant inside the tube side of the shell-and-tube heat exchanger 11, the shell-and-tube heat exchanger 11 needs to meet a certain installation position requirement, i.e., the refrigerant outlet 112 at the lower end of the shell-and-tube heat exchanger 11 is higher than the center height of the inlet 31 of the condenser 30 by more than 500 cm.
In order to ensure that the low-temperature purified water in the shell pass of the shell-and-tube heat exchanger 11 and the high-temperature low-boiling-point liquid refrigerant in the heat exchange pipeline 117 are in full contact for heat exchange, the flow of the water in the shell pass of the shell-and-tube heat exchanger 11 is from bottom to top, namely the purified water outlet 114 of the shell-and-tube heat exchanger 11 is positioned above the purified water inlet 113, so that reverse full heat exchange is ensured.
The sensible heat recovery device with the structure operates in a refrigerating system of a quick freezer with 3000kg/h, the operating working medium in the system is difluorochloromethane, the refrigerating capacity of the refrigerating equipment is 450kw/h, and 3000kg of products are frozen per hour. The compressor 20 of the refrigeration system is a 4 parallel single-machine two-stage compressor, and the condenser 30 is evaporative cooling. The shell-and-tube heat exchanger 11 is a shell-and-tube heat exchanger which adopts 316 type stainless steel shell tubes and 12-60 shell tubes, and the total heat exchange area is 40-200 square meters. The clean water tank 12 contains 100 cubic volumes of low temperature clean water. After the refrigeration system is operated, the circulating water pump 13 of the sensible heat recovery device starts to operate.
Practice proves that the water temperature can reach 35 ℃ within 24 hours after a 100 cubic water purifying tank is filled with water at 15 ℃, the heat absorbed by 100 tons of water is Q = CM △ t =4.2 x 100000 x 20 = 8400000kj = 2000000KCAL, wherein Q is heat energy, C is specific heat capacity, M is mass, and △ t is temperature change, the heat value is converted into cost according to one ton of steam generated by a self-contained boiler, the heat values are 600000KCAL per ton of steam, the heat values are equivalent to 3.34 tons of steam, the calculation of 185 yuan/ton per ton of steam according to market price is equivalent to saving 617.00 yuan per day, and the calculation of 300 days per year can directly save 185100.00 yuan.
The hot water generated by the sensible heat recovery device is successfully applied to defrosting of a quick freezer, hand washing and disinfection and the like in factory production, has remarkable economic benefit, reduces the cost for enterprise operation and production, also accords with the national research and practice about the waste heat recovery technology of refrigeration equipment, realizes the secondary utilization of the heat energy, thereby reducing the direct consumption and discharge of energy and achieving the call of energy conservation and environmental protection.
After the sensible heat recovery device is installed in the refrigeration system, the condensation area of evaporation and cooling is increased for precooling, the condensation pressure and the condensation temperature of the system are greatly reduced, and the working time of the condenser 30 is shortened. The reduction of the condensation temperature also improves the operation efficiency of the refrigerating system, so that the energy efficiency ratio of the refrigerating system is greatly improved, and the freezing quality and the freezing quantity of the product have obvious advantages compared with the product without the heat recovery equipment.
The above description is only an embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (6)
1. A sensible heat recovery apparatus of a refrigeration system, characterized in that: the shell-and-tube heat exchanger is provided with a purified water inlet, a purified water outlet, a refrigerant inlet and a refrigerant outlet, wherein the refrigerant inlet is communicated with a compressor outlet of a refrigeration system, and the refrigerant outlet is communicated with a condenser inlet of the refrigeration system; the water purifying tank is provided with a water inlet and a water outlet; the water inlet is connected with a purified water outlet of the shell-and-tube heat exchanger, and the water outlet is connected with a purified water inlet of the shell-and-tube heat exchanger; and the circulating water pump is connected between the water outlet of the water purifying tank and the purified water inlet of the shell-and-tube heat exchanger.
2. The sensible heat recovery apparatus of a refrigeration system according to claim 1, wherein: the shell-tube heat exchanger comprises a shell, partition plates arranged at two ends of the shell, a heat exchange pipeline and a shell side guide plate, wherein the heat exchange pipeline and the shell side guide plate are arranged in the shell; the water purification inlet and the water purification outlet are arranged on the side wall of the shell, the heat exchange tube is arranged between the clapboards at the two ends of the shell, the upper end of the heat exchange tube is communicated with the refrigerant inlet, and the lower end of the heat exchange tube is communicated with the refrigerant outlet.
3. The sensible heat recovery apparatus of a refrigeration system according to claim 2, wherein: and the shell pass guide plate of the shell-and-tube heat exchanger is vertically arranged.
4. The sensible heat recovery apparatus of a refrigeration system according to claim 1, wherein: and the refrigerant outlet at the lower end of the shell and tube heat exchanger is higher than the center height of the condenser inlet by more than 500 cm.
5. The sensible heat recovery apparatus of a refrigeration system according to claim 1, wherein: and the purified water outlet of the shell and tube heat exchanger is positioned above the purified water inlet.
6. The sensible heat recovery apparatus of a refrigeration system according to claim 1, wherein: the shell and tube heat exchanger is a shell and tube heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920876538.7U CN210292425U (en) | 2019-06-12 | 2019-06-12 | Sensible heat recovery device of refrigerating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920876538.7U CN210292425U (en) | 2019-06-12 | 2019-06-12 | Sensible heat recovery device of refrigerating system |
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| CN210292425U true CN210292425U (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283979A (en) * | 2020-10-09 | 2021-01-29 | 普泛能源技术研究院(北京)有限公司 | Multifunctional heat exchanger and composite absorption type system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283979A (en) * | 2020-10-09 | 2021-01-29 | 普泛能源技术研究院(北京)有限公司 | Multifunctional heat exchanger and composite absorption type system thereof |
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Address after: 361026 2508 Yang Xin Road, Haicang District, Fujian, Xiamen Patentee after: Anji Food Group Co.,Ltd. Patentee after: WUXI HUASHUN MINSHENG FOOD Co.,Ltd. Patentee after: LIAONING ANJING FOOD Co.,Ltd. Address before: 361026 2508 Yang Xin Road, Haicang District, Fujian, Xiamen Patentee before: FUJIAN ANJOY FOOD Co.,Ltd. Patentee before: WUXI HUASHUN MINSHENG FOOD Co.,Ltd. Patentee before: LIAONING ANJING FOOD Co.,Ltd. |