CN216204314U - Waste heat recovery type high-temperature hot water-steam unit - Google Patents
Waste heat recovery type high-temperature hot water-steam unit Download PDFInfo
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- CN216204314U CN216204314U CN202121945317.4U CN202121945317U CN216204314U CN 216204314 U CN216204314 U CN 216204314U CN 202121945317 U CN202121945317 U CN 202121945317U CN 216204314 U CN216204314 U CN 216204314U
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Abstract
A waste heat recovery type high-temperature hot water-steam unit relates to the field of heat pump systems. The utility model is composed of a high-temperature heat pump system and a high-temperature steam system. The high-temperature heat pump system comprises a high-temperature heat pump compressor, an oil separator, a condenser, an expansion valve and an evaporator which are sequentially connected, wherein a heat regenerator, an economizer and a subcooler are connected between the condenser and the evaporator, and an oil pipeline behind the oil separator returns to the high-temperature heat pump compressor after passing through the oil cooler. The high-temperature steam system comprises a steam generator and a steam compressor which are connected in sequence, and a circulating pipeline is arranged between the steam generator and the condenser. Compared with the prior art, the utility model can effectively utilize industrial waste heat to generate high-temperature hot water or steam, thereby achieving the effects of energy conservation and consumption reduction.
Description
Technical Field
The utility model relates to the field of heat pump systems, in particular to a waste heat recovery type high-temperature hot water-steam unit.
Background
Primary energy consumed in the processes of electric power, steel, building materials and chemical industry accounts for 75% of the total primary energy consumption of China, wherein 20-50% of energy is lost in the form of waste heat, and the energy is wasted while the environment is thermally polluted. The temperature range of the waste heat in the industrial field is 20-160 ℃, the range is wide, the amount is large, and the recovery potential is realized. The industrial heat demand is hot water with the temperature of more than 100 ℃ or steam with the saturation pressure of more than 0.1 Mpa.G, the current heat source is mainly fuel combustion in a boiler, the efficiency is low, and the energy consumption is huge. The waste heat and the heat are combined by utilizing the heat pump, so that the energy conservation and the environmental protection are certainly facilitated.
In the prior art, the heat pump system generally has the following defects:
(1) in a conventional compression heat pump system, the temperature of a hot water outlet at the condenser side is less than 60 ℃, and the industrial heat demand is difficult to match;
(2) the refrigerants adopted by the conventional heat pump are R134a, R22, R717 and the like, and the refrigerants are difficult to adapt to high-temperature working conditions;
the multi-stage compression type screw compressor or centrifugal compressor is adopted to compress natural working media to obtain high-temperature output, the output temperature of the condenser side is less than 85 ℃, the system connection is complex, and the temperature is still low.
Disclosure of Invention
In view of the above-mentioned deficiencies in the prior art, the present invention provides a waste heat recovery type high temperature hot water-steam unit. The device can effectively utilize industrial waste heat to generate high-temperature hot water or steam, thereby achieving the effects of saving energy and reducing consumption.
In order to achieve the above object, the technical solution of the present invention is implemented as follows:
the waste heat recovering high temperature hot water-steam machine set consists of high temperature heat pump system and high temperature steam system. The high-temperature heat pump system comprises a high-temperature heat pump compressor, an oil separator, a condenser, an expansion valve and an evaporator which are sequentially connected, wherein a heat regenerator, an economizer and a subcooler are connected between the condenser and the evaporator, and an oil pipeline behind the oil separator returns to the high-temperature heat pump compressor after passing through the oil cooler. The high-temperature steam system comprises a steam generator and a steam compressor which are connected in sequence, and a circulating pipeline is arranged between the steam generator and the condenser.
In the waste heat recovery type high-temperature hot water-steam unit, the quantity, the connection sequence and the connection mode of the heat regenerator, the economizer and the subcooler are arbitrary.
In the waste heat recovery type high-temperature hot water-steam unit, a return pipeline is arranged behind the subcooler and is connected with the economizer. Or a return pipeline is arranged in front of the heat regenerator, the economizer or the subcooler, and an expansion valve is arranged on the return pipeline.
In the waste heat recovery type high-temperature hot water-steam unit, a circulating pipeline between the steam generator and the condenser is provided with a circulating water pump, and a water replenishing pipeline and a water replenishing pump are arranged in the circulating pipeline.
In the waste heat recovery type high-temperature hot water-steam unit, a cold source of the heat regenerator is refrigerant steam at an outlet of the evaporator; the cold sources of the oil cooler and the subcooler can be evaporator chilled water or an external single loop. When chilled water is used as a cold source, the cold source is led out from any position in a chilled water pipeline, and then returns to the chilled water pipeline after heat absorption is finished, and the connection mode of two paths of cold sources of the oil cooler and the subcooler is not limited to be connected in series or in parallel. Valves can be arranged on the connecting pipelines of the chilled water and oil separator and the subcooler. The system can be provided with necessary valves, control components and other auxiliary devices according to requirements.
In the above waste heat recovery type high temperature hot water-steam unit, the high temperature heat pump system and the high temperature steam system are used simultaneously or independently.
The refrigerant in the high temperature heat pump system is preferably R245fa, although other high temperature refrigerants may be used.
By adopting the structure, the utility model can utilize the industrial waste heat at the temperature of about 50 ℃ to produce hot water at the temperature of more than 120 ℃ or steam with the saturated pressure higher than 0.17 Mpa.G. Compared with the prior art, the method has the following beneficial effects:
(1) the utility model can be applied in the industrial field, can effectively utilize waste heat and generate high-temperature hot water or steam;
(2) the unit can replace or partially replace a boiler for generating heat in the original industrial field, thereby reducing primary energy consumption, saving energy and reducing consumption;
(3) the utility model can be applied to any occasions with residual heat and useful heat requirements, and is particularly suitable for the occasions with high-temperature useful heat requirements.
The utility model is further described with reference to the following figures and detailed description.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
Referring to fig. 1, the waste heat recovery type high temperature hot water-steam unit of the present invention is composed of a high temperature heat pump system 1 and a high temperature steam system 2. The high-temperature heat pump system 1 includes a high-temperature heat pump compressor 4, an oil separator 6, a condenser 10, an expansion valve 14, and an evaporator 3, which are connected in this order. A heat regenerator 11, an economizer 12 and a subcooler 13 are connected between the condenser 10 and the evaporator 3, and an oil pipeline behind the oil separator 6 returns to the high-temperature heat pump compressor 4 after passing through the oil cooler 5. The high-temperature steam system 2 comprises a steam generator 8 and a steam compressor 7 which are connected in sequence, and a circulation pipeline is arranged between the steam generator 8 and a condenser 10.
The number, connection order and connection mode of the regenerators 11, the economizers 12 and the supercoolers 13 are arbitrary. A return pipeline is arranged behind the subcooler 13 and is connected with the economizer 12. A return pipeline can also be arranged in front of the heat regenerator 11, the economizer 12 or the subcooler 13, and an expansion valve is arranged on the return pipeline. A circulating water pump 9 is arranged on a circulating pipeline between the steam generator 8 and the condenser 10, and a water replenishing pipeline and a water replenishing pump are arranged in the circulating pipeline.
In the utility model, a cold source of the heat regenerator 11 is refrigerant steam at the outlet of the evaporator 3; the cold source of the oil cooler 5 and the subcooler 13 may be chilled water of the evaporator 3 or may be an external separate circuit. When the chilled water is used as a cold source, the cold source is led out from any position in the chilled water pipeline, and then returns to the chilled water pipeline after heat absorption is finished, and the connection mode of the two cold sources is not limited to be connected in series or in parallel. Valves can be arranged on the connecting pipelines of the chilled water and oil separator 6 and the subcooler 13.
The high-temperature heat pump system and the high-temperature steam system in the unit can be used simultaneously or independently. The high-temperature heat pump compressor 4, the oil separator 6, the oil cooler 5, the auxiliary pipeline, the valve and the like which are connected in series form an oil cooling loop.
In the utility model, the high-temperature heat pump compressor 4 is a high-temperature compressor capable of realizing the condensation temperature of more than 120 ℃; the steam compressor 7 is a high-temperature steam compressor which can realize steam saturation temperature above 140 ℃; the evaporator 3 is a high-efficiency shell-and-tube heat exchanger and can realize high-efficiency heat exchange in a chilled water environment below 50 ℃; the condenser 10 is a high-efficiency shell-and-tube heat exchanger and can realize the water outlet temperature of 120 ℃. The refrigerant in the high-temperature heat pump system 1 is preferably R245fa, but other high-temperature refrigerants may be used.
In practical application, if the process only needs high-temperature hot water, the high-temperature steam system 2 in the unit can be removed, and the hot water with the temperature of more than 120 ℃ can be supplied to the outside.
When the unit works, 50 ℃ chilled water is introduced into the evaporator 3 as a heat source, the liquid refrigerant is heated and evaporated to become gaseous, and the evaporation temperature is about 40 ℃. Steam at the outlet of the evaporator 3 enters a heat regenerator 11, exchanges heat with refrigerant at the outlet of a condenser 10, enters a high-temperature heat pump compressor 4, and is compressed into high-temperature high-pressure refrigerant steam, and the temperature of the steam is not lower than 125 ℃. And then the refrigerant steam enters an oil separator 6 to separate the steam from the oil, the oil passes through an oil cooler 5, the temperature of the oil is reduced, and the oil enters a high-temperature heat pump compressor 4 to complete the circulation of an oil cooling loop. The temperature after the oil cooling is determined by the temperature and flow rate of the chilled water passing through the oil cooler 5.
High-temperature refrigerant steam enters the condenser 10 to exchange heat with cooling water, and the cooling water is heated to be not lower than 120 ℃. The cooling water with the temperature of 120 ℃ enters the steam generator 8 to generate saturated steam with the saturated temperature not lower than 115 ℃. The saturated steam is compressed into high-temperature and high-pressure steam by a steam compressor 7, wherein the steam temperature is not lower than 140 ℃, and the corresponding saturated pressure is not lower than 0.36 Mpa.
The liquid refrigerant at the outlet of the condenser 10 passes through the heat regenerator 11 to exchange heat with the gaseous refrigerant from the outlet of the evaporator 3, and enters the economizer 12 and the subcooler 13 after being cooled, and the cold source of the subcooler 13 is evaporator chilled water. The branch of the refrigerant pipeline behind the subcooler 13 is connected with the economizer 12, an expansion valve is arranged on the pipeline to reduce the pressure of the refrigerant, the reduced-pressure refrigerant exchanges heat with the liquid refrigerant in the economizer 12, and the refrigerant is changed into a saturated gaseous refrigerant and then enters the high-temperature heat pump compressor 4 to be used as the middle air supplement of the high-temperature heat pump compressor. The middle air supply process improves the efficiency of the refrigeration cycle, improves the refrigerating capacity and reduces the exhaust temperature of the compressor.
The refrigerant at the outlet of the subcooler 13 has a significant degree of subcooling so that it is adapted to the operating temperature range of the expansion valve 14, and the temperature drop of the refrigerant in the subcooler 13 is determined by the flow rate and temperature of the chilled water flowing through the subcooler 13. Then the refrigerant enters the evaporator 3 after being throttled by the expansion valve 14, exchanges heat with chilled water to complete the circulation of a refrigerant loop, and the inlet and outlet temperature of the chilled water in the evaporator 3 can be 50-45 ℃.
The utility model has been described above with reference to embodiments thereof. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the utility model, and these alternatives and modifications are intended to be within the scope of the utility model.
Claims (6)
1. A waste heat recovery type high-temperature hot water-steam unit is characterized by comprising a high-temperature heat pump system (1) and a high-temperature steam system (2), wherein the high-temperature heat pump system (1) comprises a high-temperature heat pump compressor (4), an oil separator (6), a condenser (10), an expansion valve (14) and an evaporator (3) which are sequentially connected, a heat regenerator (11), an economizer (12) and a subcooler (13) are connected between the condenser (10) and the evaporator (3), and an oil pipeline behind the oil separator (6) returns to the high-temperature heat pump compressor (4) after passing through an oil cooler (5); the high-temperature steam system (2) comprises a steam generator (8) and a steam compressor (7) which are connected in sequence, and a circulating pipeline is arranged between the steam generator (8) and the condenser (10).
2. The waste heat recovery type high-temperature hot water-steam unit according to claim 1, wherein the number, connection order and connection manner of the heat regenerator (11), the economizer (12) and the subcooler (13) are arbitrary.
3. The waste heat recovery type high-temperature hot water-steam unit as claimed in claim 1 or 2, wherein a return line is arranged at an outlet of the subcooler (13) and connected with the economizer (12); or a return pipeline is arranged in front of the heat regenerator (11), the economizer (12) or the subcooler (13), and an expansion valve (14) is arranged on the return pipeline.
4. The waste heat recovery type high-temperature hot water-steam unit according to claim 3, wherein a circulation pipeline between the steam generator (8) and the condenser (10) is provided with a circulation water pump (9), and a water replenishing pipeline and a water replenishing pump are further arranged in the circulation pipeline.
5. The waste heat recovery type high-temperature hot water-steam unit as claimed in claim 4, wherein the cold source of the heat regenerator (11) is refrigerant steam at the outlet of the evaporator (3); the cold sources of the oil cooler (5) and the subcooler (13) are evaporator chilled water or an external single loop; when chilled water is used as a cold source, the cold source is led out from any position in a chilled water pipeline, and then returns to the chilled water pipeline after heat absorption is finished, and the connection mode of two paths of cold sources of the oil cooler (5) and the subcooler (13) is not limited to be connected in series or in parallel; valves are arranged on the connecting pipelines of the chilled water and oil separator (6) and the subcooler (13); the necessary valves, control components and other auxiliary devices are arranged in the system according to requirements.
6. The waste heat recovery type high temperature hot water-steam unit as set forth in claim 5, wherein the high temperature heat pump system (1) and the high temperature steam system (2) are used simultaneously or independently and separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121945317.4U CN216204314U (en) | 2021-08-19 | 2021-08-19 | Waste heat recovery type high-temperature hot water-steam unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121945317.4U CN216204314U (en) | 2021-08-19 | 2021-08-19 | Waste heat recovery type high-temperature hot water-steam unit |
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| CN216204314U true CN216204314U (en) | 2022-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116697335A (en) * | 2023-08-07 | 2023-09-05 | 冰轮环境技术股份有限公司 | Centrifugal high-temperature heat pump steam generator set |
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2021
- 2021-08-19 CN CN202121945317.4U patent/CN216204314U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116697335A (en) * | 2023-08-07 | 2023-09-05 | 冰轮环境技术股份有限公司 | Centrifugal high-temperature heat pump steam generator set |
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