Valve group for heating return water of heat supply system by using waste heat

Abstract

The utility model discloses a valve group for heating return water of a heat supply system by using waste heat, which comprises an internal circulation pipeline A-B, an external circulation water supply pipeline C-D, a bracket and a water pan, a safety valve, a first valve, a first temperature sensor, an electric three-way regulating valve, an internal circulation water pump, a heat meter, a second temperature sensor and a second valve are sequentially arranged on the internal circulation pipeline A-B from a water outlet connector of the waste heat coil pipe; a third valve, a filter, a fourth valve, an electric three-way regulating valve, a check valve, a third temperature sensor and a fifth valve are sequentially arranged on the outer circulating water supply pipeline C-D from a water inlet. The water outlet temperature of the drying furnace waste heat recovery system is controlled in a mode of combining the inner circulation pipeline and the outer circulation pipeline, direct flow distribution and conversion are carried out between the inner circulation pipeline and the outer circulation pipeline through the electric three-way adjusting valve, and therefore continuity and stability of control and adjustment are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of hot water control valves, in particular to a valve group for heating return water of a heating system by utilizing waste heat. Background Art

[0002] Taking the paint shop of an automobile factory as an example, 90 / 70℃ hot water is used in the process of production. The high-temperature hot water generated by the boiler is transported to the production workshop through a circulating water pump, and then supplied to various heat-using equipment through pipelines in the production workshop. After heat exchange, the water temperature drops and flows back to the waste heat drying valve group, and is recycled after being heated by the boiler. Due to the production process requirements, the paint shop of the automobile factory needs to set up a drying furnace for paint drying in the automobile painting process, and the exhaust gas temperature generated by drying is 190-200℃.

[0003] In the prior art, the return water with lowered water temperature after heat exchange in the heating workshop is extracted, heated up and then input into the return water, which increases the circulation resistance in the boiler room and from the boiler room to the workshop, thereby increasing the energy consumption of the circulation pump. Utility Model Content

[0004] The purpose of the utility model is to provide a valve group for heating the return water of the heating system with waste heat from a drying furnace, so that the low-temperature return water in the heating workshop is directly supplied to the hot water supply pipeline in the workshop for use in workshop process production. The recycled hot water does not need to be reheated by the boiler, thereby reducing unnecessary circulation pump energy consumption from the workshop to the boiler room and inside the boiler room during the heat recovery process.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A valve group for heating the return water of a heating system using waste heat is installed near the heat recovery coil section of a drying furnace, including an inner circulation pipeline arranged between the water inlet interface and the heat recovery water outlet interface of the heat recovery coil, an outer circulation water supply pipeline arranged between the water inlet and the inner circulation pipeline, and an outer circulation return water pipeline arranged between the inner circulation pipeline and the return water outlet; including an inner circulation pipeline AB, an outer circulation water supply pipeline CD, a bracket and a water receiving tray. The inner circulation pipeline AB is provided with a safety valve, a first valve, a first temperature sensor, an electric three-way regulating valve, an inner circulation water pump, a heat meter, a second temperature sensor, and a second valve in sequence from the water outlet interface of the waste heat coil; the outer circulation water supply pipeline CD is provided with a third valve, a filter, a fourth valve, an electric three-way regulating valve, a check valve, a third temperature sensor, and a fifth valve in sequence from the water inlet.

[0007] Preferably, the bracket and the water receiving tray are an integrated structure.

[0008] Preferably, the water outlet side of the first valve on the inner circulation pipeline AB is connected to the water inlet of the electric three-way regulating valve, and one water outlet of the electric three-way regulating valve is connected to the water outlet side of the fourth valve on the outer circulation return pipeline CD.

[0009] Preferably, the other water outlet of the electric three-way regulating valve is connected to the water outlet side of the filter on the external circulation water supply pipeline through a three-way pipe, and the three-way pipe is connected to the water inlet side of the internal circulation water pump through a section of pipeline.

[0010] Preferably, the safety valve is installed at the water outlet interface of the waste heat coil for overpressure relief to ensure that the system does not overpressure the protection valve group and the coil, and the discharged liquid is connected to an outdoor safe place through interface E.

[0011] Preferably, an adjustment support is provided at the bottom of the bracket.

[0012] Preferably, the water receiving tray has a drainage pipe opening.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In summary, the utility model controls the outlet water temperature of the waste heat recovery system of the drying furnace by combining the internal circulation pipeline and the external circulation pipeline, and directly distributes and converts the flow between the internal and external circulation pipelines through the electric three-way regulating valve, thereby ensuring the continuity and stability of the control regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model discloses a structural schematic diagram of a valve group for heating return water of a heating system using waste heat.

[0016] In the figure: 1 the first valve, 2 the fifth valve, 3 the second valve, 4 the third valve, 5 the fourth valve, 6 the first temperature sensor, 7 the electric three-way regulating valve, 8 the check valve, 9 the third temperature sensor, 10 the second temperature sensor, 11 the heat meter, 12 the internal circulation water pump, 13 the filter, 14 the bracket, 15 the water receiving tray, 16 the safety valve. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Reference Figure 1 , a valve group that uses waste heat to heat the return water of a heating system:

[0019] Installed near the heat recovery coil section of the drying furnace, including an internal circulation pipeline arranged between the water inlet interface and the heat recovery water outlet interface of the heat recovery coil, an external circulation water supply pipeline arranged between the water inlet and the internal circulation pipeline, and an external circulation return water pipeline arranged between the internal circulation pipeline and the return water outlet;

[0020] It includes an inner circulation pipeline AB, an outer circulation water supply pipeline CD, a bracket 14 and a water receiving pan 15. The inner circulation pipeline AB is provided with a safety valve 16, a first valve 1, a first temperature sensor 6, an electric three-way regulating valve 7, an inner circulation water pump 12, a heat meter 11, a second temperature sensor 10, and a second valve 3 in sequence from the water outlet of the waste heat coil; the outer circulation water supply pipeline CD is provided with a third valve 4, a filter 13, a fourth valve 5, an electric three-way regulating valve 7, a check valve 8, a third temperature sensor 9, and a fifth valve 2 in sequence from the water inlet; the bracket 14 and the water receiving pan 15 are an integrated structure, an adjusting support is provided at the bottom, and the water receiving pan 15 has a drainage pipe outlet.

[0021] Among them, in the embodiment of the utility model, the water outlet side of the first valve 1 on the internal circulation pipeline AB is connected to the water inlet of the electric three-way regulating valve 7, and one water outlet of the electric three-way regulating valve 7 is connected to the water outlet side of the fifth valve 2 on the external circulation return pipeline CD.

[0022] Among them, in the embodiment of the utility model, the valve group is used for the return water of the drying furnace waste heat heating heating system, and the other water outlet of the electric three-way regulating valve 7 is connected to the water outlet side of the filter 13 on the external circulation water supply pipeline through a three-way pipe, and the three-way pipe is connected to the water inlet side of the internal circulation water pump 12 through a section of pipeline.

[0023] Among them, in the embodiment of the utility model, a valve group is used for heating the return water of the heating system with waste heat from the drying furnace, and a safety valve 16 is set at the water outlet interface of the waste heat coil for overpressure relief to ensure that the system does not over-pressure to protect the valve group and the coil, and the discharged liquid is connected to a safe place outdoors through interface E.

[0024] Among them, in the embodiment of the utility model, the electric three-way regulating valve 7 receives the signal of the valve group control module, and adjusts the flow distribution of its two water outlets according to the temperature signal of the third temperature sensor 9.

[0025] When in use, the hot water control valve group of the embodiment of the utility model can be installed near the coil of the waste heat heating section of the drying furnace.

[0026] It should be noted that, in the embodiment of the utility model, the pipe diameter of the hot water control valve group is determined according to the maximum heat production of the drying furnace and waste heat heat coil.

[0027] In the embodiment of the utility model, the internal circulation pipeline is set up to keep the temperature of the hot water going to the workshop hot water supply main constant, which is conducive to the efficient use of the waste heat of the drying furnace and avoids unnecessary energy loss caused by the hot water entering the boiler room.

[0028] In the embodiment of the utility model, an internal circulation water pump 12 is installed on the internal circulation pipeline, which can overcome the pipeline resistance inside the heat recovery coil of the drying furnace, thereby reducing the operating pressure of the circulating hot water in the whole plant and reducing the comprehensive energy consumption of the heating system.

[0029] In the embodiment of the utility model, the electric three-way regulating valve 7 is used to directly distribute and convert the flow between the inner and outer circulation pipelines, thereby avoiding the problem of excessive pressure on the regulating valve, thereby ensuring the continuity and stability of the control regulation.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A valve group for heating return water of a heating system using waste heat, characterized in that: The utility model is installed near the heat recovery coil section of the drying furnace, and comprises an internal circulation pipeline arranged between the water inlet interface and the heat recovery water outlet interface of the heat recovery coil, an external circulation water supply pipeline arranged between the water inlet and the internal circulation pipeline, and an external circulation water return pipeline arranged between the internal circulation pipeline and the water return port; the utility model comprises an internal circulation pipeline AB, an external circulation water supply pipeline CD, a bracket (14) and a water receiving tray (15); the internal circulation pipeline AB is provided with a safety valve (16), a first valve (1), a first temperature sensor (6), an electric three-way regulating valve (7), an internal circulation water pump (12), a heat meter (11), a second temperature sensor (10), and a second valve (3) in sequence from the water outlet interface of the waste heat coil; the external circulation water supply pipeline CD is provided with a third valve (4), a filter (13), a fourth valve (5), an electric three-way regulating valve (7), a check valve (8), a third temperature sensor (9), and a fifth valve (2) in sequence from the water inlet.

2. A valve group for heating return water of a heating system using waste heat according to claim 1, characterized in that: The bracket (14) and the water receiving tray (15) are an integrated structure.

3. The valve group for heating return water of a heating system using waste heat according to claim 1, characterized in that: The water outlet side of the first valve (1) on the inner circulation pipeline AB is connected to the water inlet of the electric three-way regulating valve (7), and one water outlet of the electric three-way regulating valve (7) is connected to the water outlet side of the fourth valve (5) on the outer circulation return pipeline CD.

4. The valve group for heating return water of a heating system using waste heat according to claim 1, characterized in that: The other water outlet of the electric three-way regulating valve (7) is connected to the water outlet side of the filter (13) on the external circulation water supply pipeline through a three-way pipe, and the three-way pipe is connected to the water inlet side of the internal circulation water pump (12) through a section of pipeline.

5. The valve group for heating return water of a heating system using waste heat according to claim 1, characterized in that: The safety valve (16) is installed at the water outlet interface of the waste heat coil and is used for overpressure relief.

6. The valve group for heating return water of a heating system using waste heat according to claim 1, characterized in that: An adjustment support is provided at the bottom of the bracket (14).

7. The valve group for heating return water of a heating system using waste heat according to claim 1, characterized in that: The water receiving tray (15) is provided with a drainage pipe opening.

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