Compact condenser of high-back-pressure cascade heat supply system of air cooling unit

Abstract

The utility model provides a compact condenser of an air cooling unit high-back-pressure cascade heat supply system, which comprises a condenser body comprising a front half part and a rear half part, the front half part is connected with a steam turbine dead steam inlet pipeline, and the rear half part is connected with a second-stage heating steam inlet pipeline; the water chamber structure comprises a first front water chamber, a first middle water chamber, a second front water chamber, a second middle water chamber, a first rear water chamber, a third middle water chamber and a second rear water chamber which are communicated in sequence, and three-flow-path steering of heat supply network circulating water is formed; and the front half part heat exchange tube bundle and the rear half part heat exchange tube bundle are respectively arranged on the front half part and the rear half part and are used for heating the heat supply network circulating water in a stepped manner. According to the condenser, the equipment length and the occupied area are reduced, the arrangement of pipelines and valves is simplified, the manufacturing cost and the maintenance cost are reduced, and the condenser is suitable for high-back-pressure cascade heat supply transformation of thermal power generating units.

Description

Technical Field

[0001] This utility model relates to the technical field of heating systems for thermal power units, specifically to a compact condenser suitable for high back pressure cascade heating systems of air-cooled units. Background Technology

[0002] Currently, thermal power units in northern China generally adopt high back-pressure cascade heating retrofit technology, which requires the installation of multiple condensers to heat the circulating water of the heating network in stages for steam at different pressure levels. For example, in the existing technology using a three-stage heating system of high back pressure + turbocharger + heating network heater, two separate condensers need to be added outside the plant. This solution has the following problems:

[0003] 1) The condenser water-side piping system is complex, and the split layout results in long pipes and many valves;

[0004] 2) Steam inlet pipes and supports are scattered, occupying a large area;

[0005] 3) The equipment is scattered, resulting in high overall cost and an unsightly appearance. Utility Model Content

[0006] To address the problems of complexity, large footprint, and high cost of existing split-type condenser systems, this invention proposes a compact condenser for a high back pressure cascade heating system for air-cooled units. By merging water chambers and optimizing the water-side flow and layout, the piping system is simplified and the cost is reduced.

[0007] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows:

[0008] A compact condenser for a high back-pressure cascade heating system of an air-cooled unit, comprising:

[0009] The condenser body consists of a front half and a rear half. The front half is connected to the turbine exhaust steam inlet pipe, and the rear half is connected to the second-stage heating steam inlet pipe.

[0010] The water chamber structure includes a first water chamber, a middle water chamber, a second water chamber, a second water chamber, a third water chamber, and a second water chamber, which are connected in sequence, forming a three-flow turning of the heating network circulating water.

[0011] The front half and the rear half of the heat exchange tube bundle are arranged in the front half and the rear half respectively, and are used for the heat network circulating water for cascade heating.

[0012] Furthermore, the front half and the rear half are respectively equipped with a front half hot well and a rear half hot well, which are used to collect the condensate from the exhaust steam in the front half and the condensate from the second-stage heating steam in the rear half, and discharge them through the drain outlet pipeline.

[0013] Furthermore, the first water chamber, the middle water chamber, and the second water chamber cover the front half.

[0014] Furthermore, the rear first water chamber, the middle third water chamber, and the rear second water chamber cover the rear half.

[0015] Furthermore, the second water chamber is located between the front and rear halves.

[0016] Furthermore, the first half of the hot wells and the second half of the hot wells are connected by pipelines to achieve graded collection of condensate.

[0017] Furthermore, the throat sections of the front and rear halves are each equipped with independent vacuum ports.

[0018] Compared with existing technologies, the compact condenser of the high back pressure cascade heating system for air-cooled units proposed in this application has the following beneficial technical effects:

[0019] Compact structure: By merging the condenser and optimizing the three-pass water-side design, the overall length of the equipment is reduced, achieving a space-efficient layout; Simplified system: The number of water chambers is reduced, the heating network circulating water pipelines and valve configurations are shortened, and the system complexity is reduced; Reduced cost: The number of steam pipes and supports is reduced, saving equipment floor space and ancillary infrastructure construction costs; Convenient maintenance: The centralized layout facilitates equipment maintenance and reduces the maintenance workload of decentralized components; Improved efficiency: The optimized flow reversal design enhances the cascade heating effect of the heating network circulating water and improves the overall heating stability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of the compact condenser of the high back pressure cascade heating system of the air-cooled unit in this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] See Figure 1This application discloses a compact condenser for a high back-pressure cascade heating system of an air-cooled unit, comprising:

[0024] The condenser body includes a front half 3 and a rear half 13. The front half 3 is connected to the turbine exhaust steam inlet pipe, and the rear half 13 is connected to the second-stage heating steam inlet pipe.

[0025] The water chamber structure includes a first water chamber 1, a middle water chamber 6, a second water chamber 2, a second water chamber 7, a third water chamber 8, and a second water chamber 12 connected in sequence, forming a three-flow turning of the heating network circulating water.

[0026] The front half heat exchange tube bundle 14 and the rear half heat exchange tube bundle 15 are arranged in the front half 3 and the rear half 13 respectively, for the heat network circulating water for cascade heating.

[0027] In this application, the front half 3 and the rear half 13 are respectively provided with a front half hot well 4 and a rear half hot well 10, which are used to collect the condensate from the exhaust steam in the front half and the condensate from the second-stage heating steam in the rear half, and discharge them through the drain outlet pipes 5 and 9.

[0028] In this application, the first water chamber 1, the middle water chamber 6, and the second water chamber 2 cover the front half 3.

[0029] In this application, the rear first water chamber 11, the middle third water chamber 8, and the rear second water chamber 12 cover the rear half 13.

[0030] In this application, the second water chamber 7 is located between the front half 3 and the rear half 13.

[0031] In this application, the first half of the hot well 4 and the second half of the hot well 10 are connected by pipelines to achieve graded collection of drainage.

[0032] In this application, the throat portions of the front half 3 and the rear half 13 are each independently provided with vacuum ports.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compact condenser for a high back-pressure cascade heating system of an air-cooled unit, characterized in that, include: The condenser body includes a front half (3) and a rear half (13). The front half (3) is connected to the turbine exhaust steam inlet pipe, and the rear half (13) is connected to the second-stage heating steam inlet pipe. The water chamber structure includes a front water chamber (1), a middle water chamber (6), a front second water chamber (2), a middle second water chamber (7), a rear water chamber (11), a middle third water chamber (8), and a rear second water chamber (12) connected in sequence, which constitute the three-flow turning of the heating network circulating water; The front half heat exchange tube bundle (14) and the rear half heat exchange tube bundle (15) are arranged in the front half (3) and the rear half (13) respectively, for the heat network circulating water for cascade heating.

2. The compact condenser according to claim 1, characterized in that: The front half (3) and the rear half (13) are respectively equipped with a front half hot well (4) and a rear half hot well (10), which are used to collect the condensate from the exhaust steam in the front half and the condensate from the second-stage heating steam in the rear half, and discharge them through the drain outlet pipes (5, 9).

3. The compact condenser according to claim 1, characterized in that: The first water chamber (1), the middle water chamber (6), and the second water chamber (2) cover the front half (3).

4. The compact condenser according to claim 1, characterized in that: The rear water chamber (11), the middle three water chamber (8) and the rear two water chamber (12) cover the rear half (13).

5. The compact condenser according to claim 1, characterized in that: The middle two water chamber (7) is located between the front half (3) and the rear half (13).

6. The compact condenser according to claim 2, characterized in that: The first half of the hot well (4) and the second half of the hot well (10) are connected by pipelines to achieve graded collection of drainage.

7. The compact condenser according to claim 1, characterized in that: The throats of the front half (3) and the rear half (13) are each equipped with a vacuum port.

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