Steam condensate gradient utilization energy-saving system for heat supply

Abstract

The utility model discloses a steam condensate gradient utilization energy-saving system for heat supply, which relates to the technical field of condensate treatment and comprises a condensate generating component, a closed circulating component and an open circulating component. The closed circulation assembly comprises a condensate water tank, the condensate water tank is communicated with the condensate water generation assembly, the condensate water tank is communicated with a heat user through a secondary net water supply pipeline, the heat user is communicated with a circulation water tank through a secondary net water return pipeline, and the circulation water tank is communicated with the open circulation assembly; the open type circulation assembly comprises a greenhouse interior geothermal heating coil communicated with the circulation water tank, and the greenhouse interior geothermal heating coil is communicated with a landscape water supplementing pipeline. According to the utility model, the problem of high-price construction of condensate water recovery devices and pipelines is solved, the earlier-stage investment is saved, the problem of later-stage operation and maintenance of the condensate water recovery system is solved, and potential safety hazards in the operation and maintenance process are completely eradicated; through stepped cyclic utilization of condensate water, heat energy in the condensate water is extracted for heat supply and is finally used for landscape water supplementation, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of condensed water treatment, in particular to a cascade utilization energy-saving system of steam condensed water for heating. Background Art

[0002] The urban centralized heating system consists of heat sources, heat networks and heat users. The heating medium is high-temperature water or steam. At present, some cities in northern my country still use steam pipelines for heating.

[0003] In recent years, governments at all levels have, on the one hand, strongly supported and promoted the development of heating, and on the other hand, have further raised the requirements for air pollution control and advocated that heating companies implement the transformation and upgrading of "energy conservation, emission reduction, and environmental protection."

[0004] However, when the steam network is in heating operation, the following problems always exist:

[0005] 1. After the steam network provides heating, a large amount of condensed water is generated. The condensed water temperature is about 80°C. Generally, condensed water recovery devices and condensed water pipelines are used for recovery, but this method requires a large amount of investment and subsequent operation and maintenance.

[0006] 2. Most heating companies give up condensate recovery due to the high cost of building new condensate recovery equipment and condensate pipe systems, and directly discharge it on site, resulting in a large waste of heat energy and water resources.

[0007] 3. High-temperature water is directly discharged into the machine room, generating a large amount of water vapor, affecting the operating environment and reducing the service life of the equipment. Utility Model Content

[0008] The purpose of the utility model is to provide an energy-saving system for cascade utilization of steam condensate for heating, so as to improve energy utilization rate, save energy and reduce emissions, keep up with the national "dual carbon" policy, and further realize the safe operation of the heating system.

[0009] To achieve the above-mentioned purpose, the utility model provides the following solutions: The utility model provides a cascade utilization energy-saving system for steam condensate for heating, including a condensate generation component, a closed circulation component and an open circulation component;

[0010] The closed-loop circulation component comprises a condensation water tank, which is connected to the condensation water generating component, the condensation water tank is connected to a heat user through a secondary network water supply pipeline, the heat user is connected to a circulation water tank through a secondary network return water pipeline, and the circulation water tank is connected to the open-loop circulation component;

[0011] The open circulation component comprises a greenhouse internal heating coil connected to the circulating water tank, and the greenhouse internal heating coil is connected to a landscape water supply pipeline.

[0012] Preferably, the condensate generating component comprises a steam pipe, the steam pipe is connected to an integrated steam-water heat exchange unit, the integrated steam-water heat exchange unit is connected to one end of a condensate pipe, and the other end of the condensate pipe is connected to the condensate tank.

[0013] Preferably, a secondary network circulating water pump is installed on the secondary network return water pipeline.

[0014] Preferably, the circulating water tank is connected to the heating coil in the greenhouse through a greenhouse water supply pipeline.

[0015] Preferably, a greenhouse circulating water pump is installed on the greenhouse water supply pipeline.

[0016] Preferably, the heat user end is a radiator.

[0017] The utility model discloses the following technical effects:

[0018] The utility model solves the problem of expensive construction of condensate recovery devices and pipelines, saves initial investment, and also solves the problem of later operation and maintenance of the condensate recovery system, completely eliminates safety hazards during operation and maintenance, and saves later operation costs;

[0019] Through the step-by-step recycling of condensed water, the heat energy is extracted for heating and finally used for landscape water replenishment, without the need to purchase water resources separately, thus achieving energy conservation and emission reduction;

[0020] At the same time, it also solves the heating problem of some buildings, which is beneficial to people's livelihood and social stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] In the figure: 1. Steam pipe; 2. Integrated steam-water heat exchanger unit; 3. Condensate pipe; 4. Condensate tank; 5. Secondary network water supply pipe; 6. Heat user; 7. Secondary network return pipe; 8. Secondary network circulating water pump; 9. Circulating water tank; 10. Greenhouse water supply pipe; 11. Greenhouse circulating water pump; 12. Greenhouse ground heating coil; 13. Landscape water supply pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Reference Figure 1 As shown, this embodiment provides a cascade utilization energy-saving system for steam condensate for heating, including a condensate generating component, a closed circulation component and an open circulation component;

[0027] The closed-loop component includes a condensate tank 4, which is connected to the condensate generating component. The condensate tank 4 is connected to a heat user 6 through a secondary network water supply pipe 5. The heat user 6 is connected to a circulating water tank 9 through a secondary network return water pipe 7. The circulating water tank 9 is connected to the open-loop component.

[0028] The open circulation component includes a greenhouse internal heating coil 12 connected to a circulating water tank 9 , and the greenhouse internal heating coil 12 is connected to a landscape water supply pipeline 13 .

[0029] The high-temperature water after heat exchange of the condensate generating assembly is used to provide heat to residents or commercial users. The condensate generated after heat exchange is transported to the condensate tank 4. The condensate tank 4 transports the water to the nearby heat user 6 through the secondary network water supply pipe 5. The water used by the heat user 6 is transported to the circulating water tank 9 through the secondary network return water pipe 7. The circulating water tank 9 transports the water to the greenhouse internal heating coil 12 for continued use. After heat exchange, the water is transported to the landscape water supply pipe 13 for landscape water supply. The utility model solves the problem of high-cost construction of condensate recovery devices and pipelines, saving initial investment, and also solves the problem of later operation and maintenance of the condensate recovery system, completely eliminating safety hazards during operation and maintenance, and saving later operation costs; the condensate is recycled, and the heat energy therein is extracted for heating, and finally used for landscape water supply, without the need to purchase water resources separately, achieving energy conservation and emission reduction; at the same time, it also solves the heating problem of some buildings, which is beneficial to people's livelihood and social stability.

[0030] Further optimizing the scheme, the condensate generating assembly includes a steam pipe 1, the steam pipe 1 is connected to an integrated steam-water heat exchange unit 2, the integrated steam-water heat exchange unit 2 is connected to one end of a condensate pipe 3, and the other end of the condensate pipe 3 is connected to a condensate tank 4. The steam pipe 1 is drawn from a boiler room or a thermal power plant, and the steam pipe 1 contains saturated steam or superheated steam. The steam in the steam pipe 1 exchanges heat with the shell-and-tube heat exchange unit in the integrated steam-water heat exchange unit 2. The high-temperature water after heat exchange is used to heat residents or commercial users. After the heat exchange is completed, 80°C condensate is generated on the steam side, which is transported to the condensate tank 4 by the condensate pipe 3 for recycling.

[0031] To further optimize the solution, a secondary network circulating water pump 8 is installed on the secondary network return water pipe 7. The circulation power between the condensation water tank 4 and the circulating water tank 9 is provided by the secondary network circulating water pump 8.

[0032] In a further optimized solution, the circulating water tank 9 is connected to the heat coil 12 in the greenhouse through the greenhouse water supply pipe 10. The hot water in the circulating water tank 9 is led to the heat coil 12 in the greenhouse through the greenhouse water supply pipe 10.

[0033] To further optimize the solution, a greenhouse circulating water pump 11 is installed on the greenhouse water supply pipeline 10. The circulating power between the circulating water tank 9 and the landscape water supply pipeline 13 is provided by the greenhouse circulating water pump 11.

[0034] Further optimization scheme, the end of heat user 6 is a radiator. The hot water in the secondary network water supply pipe 5 is cooled to 55°C after heat exchange in the radiator in the heat user 6.

[0035] Working process:

[0036] The high-temperature and high-pressure steam pipeline 1 is led from the boiler room or thermal power plant. The pipeline contains saturated steam or superheated steam. The steam in the pipeline exchanges heat with the shell-and-tube heat exchanger in the integrated steam-water heat exchanger 2. The high-temperature water after heat exchange is used to heat residents or commercial users. After the heat exchange is completed, 80°C condensed water is generated on the steam side and transported to the condensed water tank 4 through the condensed water pipeline 3.

[0037] The 80°C hot water in the condensing water tank 4 is transported to the heat user 6 through the secondary network water supply pipe 5. The end of the heat user 6 is a radiator. The heat user 6 can be a heat user, a commercial user or a user with new heat demand. It can be adjusted according to actual conditions. The 80°C hot water in the secondary network water supply pipe 5 is reduced to 55°C after heat exchange through the radiator in the heat user 6. The 55°C hot water is discharged to the circulating water tank 9 through the secondary network return pipe 7. The power of this closed cycle component is provided by the secondary network circulating water pump 8.

[0038] The 55°C hot water in the circulating water tank 9 enters the greenhouse internal heating coil 12 through the greenhouse water supply pipe 10 for circulation. The greenhouse internal heating coil 12 is laid below the greenhouse floor. The hot water radiates heat through the greenhouse internal heating coil 12 to provide heat to the greenhouse and provide the necessary temperature conditions for the plants in the greenhouse. After circulation, the temperature drops from 55°C to 45°C, and then the water is cooled through the landscape water supply pipe 13 and provided to the landscape for use.

[0039] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A cascade utilization energy-saving system for steam condensate for heating, characterized in that: It includes condensate generation components, closed cycle components and open cycle components; The closed-loop circulation component comprises a condensation water tank (4), the condensation water tank (4) is connected to the condensation water generating component, the condensation water tank (4) is connected to a heat user (6) via a secondary network water supply pipeline (5), the heat user (6) is connected to a circulation water tank (9) via a secondary network return water pipeline (7), and the circulation water tank (9) is connected to the open-loop circulation component; The open circulation component comprises a greenhouse internal heating coil (12) connected to the circulating water tank (9), and the greenhouse internal heating coil (12) is connected to a landscape water supply pipeline (13).

2. The energy-saving system for cascade utilization of steam condensate for heating according to claim 1 is characterized in that: The condensate generating assembly comprises a steam pipe (1), the steam pipe (1) being connected to an integrated steam-water heat exchange unit (2), the integrated steam-water heat exchange unit (2) being connected to one end of a condensate pipe (3), and the other end of the condensate pipe (3) being connected to the condensate tank (4).

3. The energy-saving system for cascade utilization of steam condensate for heating according to claim 1 is characterized in that: A secondary network circulating water pump (8) is installed on the secondary network return water pipeline (7).

4. The energy-saving system for cascade utilization of steam condensate for heating according to claim 1 is characterized in that: The circulating water tank (9) is connected to the heating coil (12) in the greenhouse via a greenhouse water supply pipeline (10).

5. The energy-saving system for cascade utilization of steam condensate for heating according to claim 4 is characterized in that: A greenhouse circulating water pump (11) is installed on the greenhouse water supply pipeline (10).

6. The energy-saving system for cascade utilization of steam condensate for heating according to claim 1 is characterized in that: The end of the heat user (6) is a radiator.

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