CN210118815U

CN210118815U - Sewage heat recovery heating device

Info

Publication number: CN210118815U
Application number: CN201920973481.2U
Authority: CN
Inventors: 王玉强; 闻国利; 王冬; 徐爱国
Original assignee: Suihua Xiangyu Jingu Biochemical Technology Co ltd
Current assignee: Suihua Xiangyu Jingu Biochemical Technology Co ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-02-28
Anticipated expiration: 2029-06-26

Abstract

The utility model provides a sewage heat recovery heating device belongs to heating technical field, especially relates to a sewage heat recovery heating device. The problems of energy waste and water resource loss caused in the sewage cooling process are solved. The heating system comprises a heat pump, a water supply pipe, a water return pipe, a first heat exchanger, a sewage inlet pipe, a sewage return pipe, a heating water supply pipe, steam and a heating water return pipe. The device is mainly used for collecting heat of sewage and supplying heat.

Description

Sewage heat recovery heating device

Technical Field

The utility model belongs to the technical field of heating heat supply, especially, relate to a sewage heat recovery heating device.

Background

The sewage generated in the production process of biochemical enterprises needs to be cooled by circulating water, a large amount of heat is discharged to the atmosphere by a cooling tower, energy waste and water resource loss are caused, and heat emission pollution is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem among the prior art, provide a sewage heat recovery heating device.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a heat recovery heating device of sewage, it includes heat pump, delivery pipe, wet return, first heat exchanger, sewage inlet tube, sewage wet return, heating delivery pipe, steam and heating wet return, heat pump internal circulating water gets into first heat exchanger through the delivery pipe and carries out the heat transfer after, gets into the heat pump along the wet return, sewage gets into first heat exchanger in the sewage inlet tube and carries out the heat transfer after, flows along the sewage wet return, in the steam gets into the heat pump, after heating water gets into in the heat pump and carries out the heat transfer with circulating water and steam in the heating wet return, flows along the heating delivery pipe.

Furthermore, a filter is arranged on the sewage inlet pipe, and sewage in the sewage inlet pipe enters the first heat exchanger for heat exchange after passing through the filter.

Further, the first heat exchanger is a spiral plate heat exchanger.

Furthermore, the heat supply device also comprises a drain tank, and drain generated after the heat exchange of the steam in the heat pump enters the drain tank.

Furthermore, the heating device further comprises a second heat exchanger, the steam enters the second heat exchanger, the heating water in the heating water return pipe enters the second heat exchanger to exchange heat with the steam in the second heat exchanger, then flows out along a heating water supply pipe, and the hydrophobic water generated after the steam in the second heat exchanger exchanges heat enters the hydrophobic tank.

Further, the second heat exchanger is a shell-and-tube heat exchanger.

Further, the heat pump is connected to a demineralized water line.

Furthermore, a heat collector, a primary heater, a concentrator and a secondary heater are arranged in the heat pump, and the heat collector, the primary heater, the concentrator and the secondary heater are sequentially connected.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides an extravagant and the water resource loss's of the energy that causes among the sewage cooling process problem, combine the demand of heating in winter, with sewage heat recovery and be applied to the water of heating or needs heating, convert the low-grade heat energy in the sewage into high-grade usable heat energy, satisfy production or life in the heating demand to can improve energy utilization and rate, can reduce thermal emission and water resource loss simultaneously again. The cooling device is suitable for various production enterprises which generate sewage with a certain temperature, need to cool and then discharge the sewage and have heating requirements.

The heating operation time is 4320 hours in 6 months, the heat supply amount is 4070KW, and the electricity price is 0.4 yuan/kWh; the steam price is 88 yuan/ton, the steam consumption required by the operation of the original heating system is 5.8t/h, and the electricity used for the operation of the system is mainly used by a heating water pump; the utility model discloses steam consumption is 2.56t/h, and the system auxiliary power consumption is 30.1KW, and the heating water pump power consumption is the same with original heating system and does not do the comparison. Compared with the original heating system, the heating system saves steam per hour: 5.8-2.56 is 3.24t/h, energy saving rate: 3.24/5.8-55.8%; the steam quantity is saved in the heating season: 3.24 × 4320 ═ 13996.8 t; the steam cost is saved by 123.17 ten thousand yuan in the heating season. The auxiliary power consumption is 30.1kW, the total power consumption in the heating season is 13 ten thousand DEG, and the annual power consumption cost is increased by 5.2 ten thousand yuan. The benefits are generated in winter: 123.17-5.2 ═ 117.97 ten thousand yuan. The heat pump is connected with the demineralized water pipeline, utilizes sewage heat heating demineralized water summer, can retrieve heat 4070KW equally, consequently, annual benefit: 117.97 x 2 is 235.94 ten thousand yuan, and the heat quantity of the recovered sewage is equivalent to saving 256t/h of circulating water.

Drawings

FIG. 1 is a schematic structural view of a heat recovery and supply device for sewage

1-heat pump, 2-water supply pipe, 3-water return pipe, 4-first heat exchanger, 5-filter, 6-sewage inlet pipe, 7-sewage return pipe, 8-heating water supply pipe, 9-steam, 10-second heat exchanger, 11-heating return pipe, 12-drain tank

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely explained below with reference to the drawings in the embodiment of the present invention.

Referring to fig. 1, the present embodiment is described, which is a heat recovery and heat supply device for waste water, and the heat recovery and heat supply device includes a heat pump 1, a water supply pipe 2, a water return pipe 3, a first heat exchanger 4, a waste water inlet pipe 6, a waste water return pipe 7, a heating water supply pipe 8, steam 9, and a heating water return pipe 11, wherein circulating water in the heat pump 1 enters the first heat exchanger 4 through the water supply pipe 2 for heat exchange, then enters the heat pump 1 along the water return pipe 3, waste water in the waste water inlet pipe 6 enters the first heat exchanger 4 for heat exchange, and then flows out along the waste water return pipe 7, the steam 9 enters the heat pump 1, and heating water in the heating water return pipe 11 enters the heat pump 1 for heat exchange with the circulating water and.

In this embodiment, sewage gets into first heat exchanger 4 along sewage inlet tube 6, the circulating water gets into first heat exchanger 4 along delivery pipe 2, the circulating water of first heat exchanger 4 is flowed through in the sewage heating, follow sewage return pipe 7 and get back to follow-up workshop section after the sewage cooling, circulating water after the intensification gets into heat pump 1 along wet return 3, realize closed circulation cooling, steam 9 that comes from the steam pipe network gets into heat pump system and drives as heat energy, heating water carries out the heat transfer along heating wet return 11 in getting into heat pump 1 with circulating water and steam 9 and intensifies the back, flow along heating delivery pipe 8 and get into each heating region. The sewage flow in the sewage inlet pipe 6 is 205m³The temperature is 50-55 ℃, the temperature is reduced to 40-45 ℃ after heat exchange, the flow of steam 9 from a steam pipe network is 2.56t/h, the pressure is 0.5Mpa, and the flow of heating water in the heating water return pipe 11 is 350m³And/h, the temperature is raised to 95 ℃ at most in the heat pump 1 and the effluent is discharged.

In this embodiment, the filter 5 is disposed on the sewage inlet pipe 6, the sewage in the sewage inlet pipe 6 enters the first heat exchanger 4 for heat exchange after passing through the filter 5, the filter 5 takes out impurities in the sewage, the first heat exchanger 4 is a spiral plate heat exchanger, and ensures that the sewage and circulating water can fully exchange heat, the heat supply device further comprises a drain tank 12, the drain generated after heat exchange of the steam 9 in the heat pump 1 enters the drain tank 12, the drain generated by steam condensation is collected by the drain tank 12, and can supplement the heating water as required to maximize the utilization, the heat supply device further comprises a second heat exchanger 10, the steam 9 enters the second heat exchanger 10, the heating water in the heating water return pipe 11 enters the second heat exchanger 10 and flows out along the heating water supply pipe 8 after exchanging heat with the steam 9 in the second heat exchanger 10, the drain generated after heat exchange of the steam 9 in the second heat exchanger 10 enters the drain tank 12, the second heat exchanger 10 stops using when heat pump 1 moves, overhauls or the load is lower when the mill, and when heat pump 1 can not satisfy the heating requirement, can switch to the operation mode of second heat exchanger 10, guarantees normal heating, second heat exchanger 10 is the shell heat exchanger, heat pump 1 links to each other with the demineralized water pipeline, and heat pump 1 links to each other with the demineralized water pipeline, utilizes the sewage heat to heat the demineralized water summer to the demineralized water is as heat medium water, will follow the absorbed heat in the sewage and take away by the demineralized water, saves the used heating steam of boiler water supply.

This embodiment be provided with heat collector, primary heater, concentrator and secondary heater in the heat pump 1, heat collector, primary heater, concentrator and secondary heater connect gradually. In a near-vacuum heat collector, liquid water from the upper part of a shell pass is sprayed to contact the surface of a heat transfer pipe and evaporate at a low temperature by utilizing the principle that the water is low in boiling point under a negative pressure state, so that the heat of residual heat water flowing in the shell pass is absorbed, and simultaneously water vapor is generated and enters a primary heater to finish the extraction and recovery process of the heat; in the primary heater, the strong water absorption property of the working medium pair concentrated solution is utilized, the working medium pair concentrated solution from the upper part absorbs water vapor from the heat collector, so that the temperature of the solution is increased, heating water with the temperature being increased in the heat transfer pipe is heated when the working medium pair concentrated solution is contacted with the heat transfer pipe, the heat transfer of the absorbed waste heat water is realized, and meanwhile, the working medium pair solution is diluted from the concentrated state, does not have water absorption any more and needs to be heated and concentrated; in the concentrator, steam is used as heat of an external driving heat source to concentrate the working medium from the primary heater to dilute the solution, the generated concentrated solution has strong water absorption and continuously enters the primary heater to be absorbed, and simultaneously the generated steam enters the secondary heater to heat the heating water again; in the secondary heater, the heating water which is primarily heated from the primary heater is reheated by utilizing the heat of the condensation latent heat of the high-temperature water vapor from the concentrator, the heating water required in the process is finally generated, and the steam is condensed into water to enter the heat collector for evaporation and heat extraction.

The above detailed description is given to the sewage heat recovery heating device provided by the present invention, and the detailed examples are applied herein to explain the principle and the implementation of the present invention, and the description of the above examples is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides a sewage heat recovery heating device which characterized in that: it includes heat pump (1), delivery pipe (2), wet return (3), first heat exchanger (4), sewage inlet tube (6), sewage wet return (7), heating delivery pipe (8), steam (9) and heating wet return (11), heat pump (1) internal circulating water gets into first heat exchanger (4) through delivery pipe (2) and carries out the heat transfer after, gets into heat pump (1) along wet return (3), sewage gets into first heat exchanger (4) in sewage inlet tube (6) and carries out the heat transfer after, flows along sewage wet return (7), steam (9) get into in heat pump (1), heating water gets into in heat pump (1) in heating wet return (11) and carries out the heat transfer with circulating water and steam (9) after, flows along heating delivery pipe (8).

2. A waste water heat recovery heating apparatus according to claim 1, wherein: be provided with filter (5) on sewage inlet tube (6), sewage gets into first heat exchanger (4) after passing through filter (5) and carries out the heat transfer in sewage inlet tube (6).

3. A waste water heat recovery heating apparatus according to claim 1, wherein: the first heat exchanger (4) is a spiral plate heat exchanger.

4. A waste water heat recovery heating apparatus according to claim 1, wherein: the heat supply device also comprises a drain tank (12), and drain generated after heat exchange of steam (9) in the heat pump (1) enters the drain tank (12).

5. A waste water heat recovery heating apparatus according to claim 4, wherein: the heating device further comprises a second heat exchanger (10), the steam (9) enters the second heat exchanger (10), heating water in the heating water return pipe (11) enters the second heat exchanger (10) to exchange heat with the steam (9) in the second heat exchanger (10) and then flows out along the heating water supply pipe (8), and hydrophobic water generated after the heat exchange of the steam (9) in the second heat exchanger (10) enters the drain tank (12).

6. A waste water heat recovery heating apparatus according to claim 5, wherein: the second heat exchanger (10) is a shell-and-tube heat exchanger.

7. A waste water heat recovery heating apparatus according to claim 1, wherein: the heat pump (1) is connected with a demineralized water pipeline.

8. A sewerage heat recovery heating installation according to any one of claims 1-7, characterised in that: a heat collector, a primary heater, a concentrator and a secondary heater are arranged in the heat pump (1), and the heat collector, the primary heater, the concentrator and the secondary heater are sequentially connected.