Thermal station system capable of directly supplying heat

Abstract

The utility model discloses a direct heat supply heating station system which comprises a plate heat exchanger, the plate heat exchanger is provided with a heat inlet, a heat outlet, a cold inlet and a cold outlet, heat users are divided into a first heat user group and a second heat user group, the first heat user group is provided with a first user water inlet and a first user water outlet, and the second heat user group is provided with a second user water outlet. The second heat user group is provided with a second user water inlet and a second user water outlet; the heat source water supply pipeline is connected with the heat inlet, the heat outlet is connected with the first user water inlet through a pipeline, the first user water outlet is connected with the cold inlet through a pipeline, the cold outlet is connected with the second user water inlet through a pipeline, the second user water outlet is connected with the heat source water return pipeline, and the circulating pump is arranged on the heat source water return pipeline. A primary heat supply network and a secondary heat supply network are directly communicated through the hot side cooling and cold side heating functions of the plate heat exchanger, the equipment construction and operation cost is reduced, softened water is uniformly used by the heat supply networks, and the service life of heat supply network pipelines is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of urban heating network heating, and particularly relates to a heating station system for direct heating. Background Art

[0002] In the urban heating network heating system, several heating stations are built in the heating area according to the regional distribution of users and the size of the heating area. The high-temperature hot water from the heat source is converted into a temperature and pressure suitable for the user's needs, and then distributed to each user; according to the user's needs and the change of outdoor temperature, the flow, temperature and pressure of the heating medium are adjusted to achieve on-demand heating and improve energy utilization efficiency.

[0003] like Figure 1 As shown, the thermal power station 01 of the prior art includes a plate heat exchanger 02, a secondary heat network water supply tank 03, a secondary heat network circulation pump 04, and a secondary heat network water supply pump 05. The heat source is connected to the hot side of the plate heat exchanger in a circular manner to form a primary heat network. All heat users 06 in the heating area of ​​the thermal power station are connected in parallel, and the parallel-connected heat users are connected to the cold side of the plate heat exchanger in a circular manner to form a secondary heat network. Its disadvantages are: (1) Each thermal power station must be equipped with a secondary heat network water supply tank, a secondary heat network water supply pump, and a secondary heat network circulation pump, which increases equipment construction investment and operating costs; (2) The water used in the secondary heat network is generally composed of ordinary water plus a descaling agent, which has a certain corrosive effect on the secondary heat network and user radiators, and is not conducive to extending the service life of the heat network pipeline. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art and provide a thermal power station system for direct heating. It utilizes the cooling function of the hot side and the heating function of the cold side of the plate heat exchanger to directly connect the primary heating network and the secondary heating network, thereby reducing equipment construction investment and operating costs. The heating network uniformly uses softened water, which is conducive to extending the service life of the heating network pipeline.

[0005] The purpose of the utility model is achieved as follows: a thermal power station system for direct heating, which includes a plate heat exchanger, a hot side of the plate heat exchanger is provided with a hot inlet and a hot outlet, a cold side of the plate heat exchanger is provided with a cold inlet and a cold outlet, and the heat users in the heating area of ​​the thermal power station are divided into a first heat user group and a second heat user group, the water inlet end of the first heat user group is connected in parallel to the first user water inlet, the water outlet end of the first heat user group is connected in parallel to the first user water outlet, the water inlet end of the second heat user group is connected in parallel to the second user water inlet, and the water outlet end of the second heat user group is connected in parallel to the second user water outlet; a heat source water supply pipeline is connected to the hot inlet, the hot outlet is connected to the first user water inlet through a pipeline, the first user water outlet is connected to the cold inlet through a pipeline, the cold outlet is connected to the second user water inlet through a pipeline, the second user water outlet is connected to the heat source return pipeline, and a circulating pump is arranged on the heat source return pipeline.

[0006] Preferably, it also includes a water replenishment tank and a water replenishment pump for replenishing the softened water in the water replenishment tank into the heat source return water pipeline.

[0007] Preferably, a flow regulating valve is provided on the heat source water supply pipeline at the front end of the heat inlet.

[0008] Preferably, the difference between the heating areas of the first heat user group and the second heat user group is less than 5% of the total heating area.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] (1) The utility model does not need to set up a secondary heat network circulation pump. The primary heat network circulation pump can be used to complete the hot water circulation of the heating system between the heat source and the heat user, saving the construction investment cost and operation cost of the secondary heat network circulation pump.

[0011] (2) The utility model does not need to set up a secondary heating network water supply tank and a secondary heating network water supply pump, saving the construction investment cost and operation cost of the secondary heating network water supply tank and the secondary heating network water supply pump.

[0012] (3) The utility model does not need to provide circulating water with descaling agent to the secondary heating network. The primary heating network and the secondary heating network are connected and use softened water uniformly, which solves the scaling and corrosion problems of the heating network pipes and is beneficial to improving the service life of the heating network pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the existing thermal power station system structure.

[0014] Figure 2 It is a schematic diagram of the structure of a thermal power station system for direct heating of the utility model.

[0015] Figure 1 Middle: 01 thermal power station, 02 plate heat exchanger, 03 secondary heating network water supply tank, 04 secondary heating network circulation pump, 05 secondary heating network water supply pump, 06 heat user.

[0016] Figure 2 Middle: 1 plate heat exchanger, 2 hot inlet, 3 hot outlet, 4 cold inlet, 5 cold outlet, 6 first hot user group, 7 second hot user group, 8 first user water inlet, 9 first user water outlet, 10 second user water inlet, 11 second user water outlet, 12 heat source water supply pipeline, 13 heat source return pipeline, 14 circulation pump, 15 make-up water tank, 16 make-up water pump, 17 flow regulating valve. DETAILED DESCRIPTION

[0017] The utility model is described in detail below in conjunction with the accompanying drawings.

[0018] like Figure 2As shown, a direct heating heat station system comprises a plate heat exchanger 1, a hot side of the plate heat exchanger 1 is provided with a hot inlet 2 and a hot outlet 3, a cold side of the plate heat exchanger 1 is provided with a cold inlet 4 and a cold outlet 5, heat users in the heating area of ​​the heat station are divided into a first heat user group 6 and a second heat user group 7, a water inlet end of the first heat user group 6 is connected in parallel to a first user water inlet 8, a water outlet end of the first heat user group 6 is connected in parallel to a first user water outlet 9, a water inlet end of the second heat user group 7 is connected in parallel to a second user water inlet 10, and a second The water outlet of the heat user group 7 is connected in parallel to the second user water outlet 11; the heat source water supply pipeline 12 is connected to the heat inlet 2, the heat outlet 3 is connected to the first user water inlet 8 through a pipeline, the first user water outlet 9 is connected to the cold inlet 4 through a pipeline, the cold outlet 5 is connected to the second user water inlet 10 through a pipeline, and the second user water outlet 11 is connected to the heat source return water pipeline 13, and a circulation pump 14 is arranged on the heat source return water pipeline 13; it also includes a water replenishment tank 15 and a water replenishment pump 16 that replenishes the softened water in the water replenishment tank 15 into the heat source return water pipeline 13. A flow regulating valve 17 is arranged on the heat source water supply pipeline 12 at the front end of the heat inlet 2. The heating area of ​​the first heat user group and the second heat user group is the same.

[0019] The working principle of the utility model is described as follows in conjunction with the accompanying drawings:

[0020] (1) Softened water at 60°C from the heat source enters the hot side from the hot inlet 2 of the plate heat exchanger 1. The softened water releases heat on the hot side, and the water temperature drops to 50°C and flows out from the hot outlet 3;

[0021] (2) 50°C softened water from the heat outlet 3 enters the first heat user group 6 from the first user water inlet 8, and provides heat to all heat users in the first heat user group 6. The softened water releases heat in the first heat user group 6, and the water temperature drops to 40°C and flows out from the first user water outlet 9;

[0022] (3) 40°C softened water from the first user water outlet 9 enters the cold side from the cold inlet 4 of the plate heat exchanger 1. The softened water absorbs heat on the cold side, and the water temperature rises to 50°C and flows out from the cold outlet 5;

[0023] (4) 50°C softened water from the cold outlet 5 enters the second heat user group 6 from the second user water inlet 10, and provides heat to all heat users in the second heat user group 7. The softened water releases heat in the second heat user group 7, and the water temperature drops to 40°C and flows out from the second user water outlet 11;

[0024] (5) The 40 ℃ softened water flowing out from the second user outlet 11 flows back to the heat source through the heat source return line 13;

[0025] (6) The thermal power station can adjust and control the water temperature of the heat source and the temperature requirements of the heat users by adjusting the speed of the circulation pump 14 and adjusting the flow control valve 17.

[0026] (7) The thermal power station of the utility model also includes some conventional equipment and components, such as: controller, temperature sensor, pressure sensor, thermometer, pressure gauge, manual valve, electric valve, etc. These are not the innovative contents of the utility model and are not described in the specification.

[0027] The contents of the above specific implementation methods are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A direct heating power station system, comprising a plate heat exchanger, wherein the hot side of the plate heat exchanger is provided with a hot inlet and a hot outlet, and the cold side of the plate heat exchanger is provided with a cold inlet and a cold outlet, characterized in that: The heat users in the heating area of ​​the heat station are divided into a first heat user group and a second heat user group, the water inlet of the first heat user group is connected in parallel to the water inlet of the first user, the water outlet of the first heat user group is connected in parallel to the water outlet of the first user, the water inlet of the second heat user group is connected in parallel to the water inlet of the second user, and the water outlet of the second heat user group is connected in parallel to the water outlet of the second user; The heat source water supply pipeline is connected to the hot inlet, the hot outlet is connected to the first user water inlet through a pipeline, the first user water outlet is connected to the cold inlet through a pipeline, the cold outlet is connected to the second user water inlet through a pipeline, the second user water outlet is connected to the heat source return pipeline, and a circulating pump is set on the heat source return pipeline.

2. The direct heating thermal power station system according to claim 1 is characterized in that: The utility model also comprises a water supply tank and a water supply pump which supplies the softened water in the water supply tank to the heat source return water pipeline.

3. The direct heating thermal power station system according to claim 2 is characterized in that: A flow regulating valve is provided on the heat source water supply pipeline at the front end of the heat inlet.

4. The direct heating thermal power station system according to claim 3 is characterized in that: The difference between the heating areas of the first heat user group and the second heat user group is less than 5% of the total heating area.

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