A multi-pressure grade steam and water recovery device for a comprehensive pipe gallery in a cold region

Abstract

The utility model belongs to enterprise industrial water recovery processing technical field, concretely is a kind of comprehensive pipe gallery multi-pressure grade steam drainage recovery device in severe cold area. Including the steam pipeline of multiple pressure grades, still including multi-pressure buffer system, centralized anti-freezing recovery system and anti-backflow export system;Multi-pressure buffer system includes pressure buffer tank, and pressure buffer tank inlet is connected with each drainage valve group output end jointly, and pressure buffer tank water outlet is connected with the water inlet of centralized anti-freezing recovery system;Centralized anti-freezing recovery system includes series type recovery water tank group;Anti-backflow export system includes condensate tank, and condensate tank water outlet is connected with the import of linkage water pump, and the outlet of linkage water pump is connected condensation water network pipe through straight pipe section.It is not destroyed while the original each pressure grade steam pipeline, through increasing multi-pressure buffer system, centralized anti-freezing recovery system and anti-backflow export system, improves drainage efficiency and recovery amount.

Description

Technical Field

[0001] This utility model belongs to the field of industrial water recycling and treatment technology, specifically a multi-pressure level steam condensate recovery device for integrated pipe gallery in extremely cold regions. Background Technology

[0002] In the production process of smelting enterprises, steam, as an important energy carrier, is widely used in various stages such as heating, insulation, and driving equipment. Due to the different requirements of production processes, steam pipeline networks typically contain steam pipelines of multiple pressure levels, such as medium-pressure superheated steam for driving power equipment, medium-pressure saturated steam for process heating, and low-pressure steam for pipeline heating or domestic auxiliary purposes. Multiple steam pipelines are arranged in integrated pipe corridors. During steam transportation and use, as the temperature decreases, steam condenses inside the pipelines, forming "condensate." After steam passes through materials or heat exchangers, the high-temperature condensate (condensate) and exhaust steam are directly discharged into sewers and the air, resulting in waste. Furthermore, the discharge of high-temperature condensate, exhaust steam, and secondary flash steam can obstruct visibility, easily causing burns and creating numerous inconveniences for on-site management. In extremely cold regions, the antifreeze of water tanks must also be considered for condensate recovery. Currently, most enterprises use steam traps and bypass valves in the condensate circuit of steam pipelines to directly connect the outlet pipe to the atmosphere or sewer well, resulting in the disorderly discharge of condensate vapor (condensate + steam) mixture. Therefore, there is an urgent need to design a steam condensate recovery device that can be used in extremely cold regions to meet the usage requirements. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a multi-pressure-level steam condensate recovery device for integrated utility tunnels in extremely cold regions. Without damaging the existing steam pipelines at each pressure level, it improves condensate recovery efficiency and volume by adding a multi-pressure buffer system, a centralized anti-freeze recovery system, and an anti-backflow external transmission system to the steam pipelines at multiple pressure levels (such as medium-pressure superheated pipelines, medium-pressure saturated pipelines, and low-pressure steam pipelines). This achieves dual recovery of water resources and heat energy, resulting in significant energy conservation and emission reduction, while also enhancing the safety of the recovery system. Furthermore, it considers both condensate storage and anti-freeze measures for recovery, allowing for normal operation in winter while recovering condensate that would otherwise be wasted.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a multi-pressure level steam condensate recovery device for integrated utility tunnels in extremely cold regions, comprising steam pipelines of multiple pressure levels (medium-pressure superheated pipelines, medium-pressure saturated pipelines, and low-pressure steam pipelines), each steam pipeline corresponding to a condensate trap group, and the bottom of each steam pipeline connected to the corresponding condensate trap group via its own condensate pipe; it also includes a multi-pressure buffer system, a centralized antifreeze recovery system, and an anti-backflow external transmission system;

[0005] The multi-pressure buffer system includes a pressure buffer tank, the inlet of which is connected to the output of each drain valve group, and the outlet of which is connected to the inlet of the centralized antifreeze recovery system (primary recovery water tank).

[0006] The centralized antifreeze recovery system includes a series-connected recovery water tank group, which is installed under the ground antifreeze layer. The series-connected recovery water tank group consists of multiple recovery water tanks connected end to end, and there is a height difference between the upper-level recovery water tank and the adjacent lower-level recovery water tank. The inlet of the first-level recovery water tank is connected to the outlet of the pressure buffer tank. The outlet of the last-level recovery water tank is connected to the anti-backflow external transmission system.

[0007] The backflow prevention and external discharge system includes a condensate tank. The inlet of the condensate tank is connected to the outlet of the last-stage recovery tank. The outlet of the condensate tank is connected to the inlet of the linked water pump. The outlet of the linked water pump is connected to the condensate network pipe via a straight pipe section. (The condensate network pipe is used for the transportation and secondary utilization of collected condensate.)

[0008] Furthermore, a level gauge, specifically a radar level gauge, is installed on the condensate tank.

[0009] Furthermore, the series-connected water recovery tank assembly includes at least two stages of water recovery tanks.

[0010] Furthermore, the straight pipe section is equipped with a one-way valve at the end of the pipeline network to prevent backflow of water from the condensate network.

[0011] Furthermore, an automatic air vent valve is installed on the condensate network pipe.

[0012] Furthermore, the condensate tank inlet is equipped with an electrically operated on / off valve.

[0013] Furthermore, each drain valve assembly is equipped with a bypass valve connected in parallel.

[0014] Furthermore, the pressure buffer tank is equipped with an automatic vent valve.

[0015] Furthermore, in a series-connected water recycling system, the outlet of the previous stage water recycling tank is connected to the inlet of the next stage water recycling tank, and water flows from the first stage water recycling tank into the last stage water recycling tank by gravity.

[0016] Compared with the prior art, this utility model has the following advantages.

[0017] This utility model has a compact system structure and can be applied to the collection of condensate in the coordinated operation of steam pipelines of various pressure levels.

[0018] This invention combines multi-stage water recovery tanks with a unified condensate tank for recovery, thereby increasing the amount and efficiency of water recovery. It achieves dual recovery of water resources and heat energy, resulting in significant energy conservation and emission reduction.

[0019] This invention features a closed-loop condensate (hydrophobic) inlet into a recovery tank, ensuring condensate quality, preventing the escape of steam-water mixtures from direct discharge, and eliminating noise and safety issues caused by high-temperature water discharge. It also incorporates antifreeze and recovery features to ensure normal system operation in winter and is suitable for condensate recovery in steam tracing systems.

[0020] This utility model system adopts an intermittent start-stop water pump + gravity reflux design to reduce energy consumption. In addition, there is no water trap in the straight pipe section at the water pump outlet. After the pump stops, the condensate automatically returns to the condensate tank below the antifreeze layer to avoid freezing the pipe and solve the risk of freezing the pipe. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0022] Figure 1 This is a flow chart of a multi-pressure level steam condensate recovery device for integrated utility tunnels in extremely cold regions.

[0023] In the diagram, 1. Medium-pressure superheated pipeline; 2. Medium-pressure saturated pipeline; 3. Low-pressure steam pipeline; 4. Steam trap assembly; 5. Bypass valve; 6. Pressure buffer tank; 7. Automatic air vent valve; 8. Primary recovery water tank; 9. Secondary recovery water tank; 10. Tertiary recovery water tank; 11. Final recovery water tank; 12. Level gauge; 13. Condensate tank; 14. Linked water pump; 15. Straight pipe section; 16. Check valve; 17. Condensate network pipe; 18. Electric on / off valve. Detailed Implementation

[0024] To make the purpose, technical solution, and beneficial effects of this utility model clearer, the following will be described in conjunction with the appendix of this utility model. Figure 1 The technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] like Figure 1 As shown, a specific embodiment is as follows:

[0026] This invention relates to a multi-pressure level steam condensate recovery device for integrated utility tunnels in frigid regions, comprising steam pipelines of multiple pressure levels (medium-pressure superheated pipeline 1, medium-pressure saturated pipeline 2, and low-pressure steam pipeline 3), with the bottom of each pipeline connected to a corresponding condensate trap group 4 via a condensate pipe, and each condensate trap group 4 having a bypass valve 5 connected in parallel; it also includes: a multi-pressure buffer system, a centralized antifreeze recovery system, and an anti-backflow external transmission system.

[0027] To save space, the drain valve pipes should be arranged in groups close to the pipe gallery columns.

[0028] Each pressure level steam pipeline is equipped with an automatic steam trap assembly 4 at its bottom, which automatically opens / closes based on the set pressure difference. Each pressure system has a dedicated condensate pipe for connecting to the corresponding steam trap assembly 4, ultimately summing the pressure distribution. The rear end of the steam trap assembly 4 is connected to a common condensate collection pipe, and a pressure buffer tank 6 is installed at the end of the pipe to balance the condensate from different pressure level steam pipeline sections. An underground primary recovery water tank 8 is connected to the end of the pressure buffer tank 6. The pressure buffer tank 6 is equipped with an automatic air vent valve 7, and a bypass valve 5 is connected in parallel with the steam trap assembly 4.

[0029] The centralized antifreeze recovery system includes an underground primary recovery water tank 8 located below the frost layer (burial depth H≥1.5m), and multiple underground recovery water tanks (including secondary recovery water tank 9, tertiary recovery water tank 10, etc.). The primary recovery water tank 8 is connected in series with other nearby recovery water tanks, arranged with a height difference. The outlet of one recovery water tank is the inlet of the next, and water can flow from the first recovery water tank 8 into the final stage recovery water tank 11 by gravity. The tanks are made of impermeable materials and have a certain volume. After the drainage has filled all the recovery water tanks, the drainage flows from the drain outlet of the final stage recovery water tank 11 through the electrically operated on / off valve 18 to the condensate tank 13 equipped with a recovery device. The condensate tank 13 is equipped with an electrically operated on / off valve 18 at the inlet, and a radar level gauge 12 is installed on the top of the tank for easy water level monitoring.

[0030] The backflow prevention system includes a radar level gauge 12 installed in the condensate tank 13. When the water level reaches the high threshold h1, the pump 14 is activated to pump water through the straight pipe section 15 into the condensate recovery network pipe 17. When the water level drops to the low threshold h2, the pump stops, and the residual water in the straight pipe section 15 flows back to the condensate tank 13 by gravity, preventing freezing of the section above ground level. A one-way valve 16 is installed at the inlet of the recovery network terminal of the straight pipe section 15 to prevent backflow of water from the condensate network pipe 17 when the pump stops. An automatic air vent valve 7 is installed on the condensate network pipe 17.

[0031] The working process of this device is as follows: Condensate generated by steam pipelines of various pressure levels first enters pressure buffer tank 6 through steam trap group 4 for pressure balancing, and then flows into underground primary recovery water tank 8. It then flows through series of recovery water tank groups 9, 10, and 11, gradually collecting by gravity into condensate tank 13. Finally, the condensate is transported to the recovery pipeline network 17 by linkage pump 14. The entire process is automatically controlled and requires no manual intervention.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "preferred embodiment," "detailed description," or "preferred embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 or all of the technical features therein. Therefore, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of this utility model.

Claims

1. A multi-pressure level steam condensate recovery device for integrated pipe gallery in frigid regions, comprising steam pipes of multiple pressure levels, each steam pipe corresponding to a steam trap assembly (4), and the bottom of each steam pipe connected to the corresponding steam trap assembly (4) via its own condensate pipe; characterized in that, It also includes a multi-pressure buffer system, a centralized antifreeze recovery system and an anti-backflow external transmission system; the multi-pressure buffer system includes a pressure buffer tank (6), the inlet of the pressure buffer tank (6) is connected to the output end of each drain valve group (4), and the outlet of the pressure buffer tank (6) is connected to the inlet of the centralized antifreeze recovery system; The centralized antifreeze recovery system includes a series-connected recovery water tank group, which is set under the ground antifreeze layer; the series-connected recovery water tank group consists of multiple recovery water tanks connected end to end, and there is a height difference between the upper-level recovery water tank and the adjacent lower-level recovery water tank; the inlet of the first-level recovery water tank (8) is connected to the outlet of the pressure buffer tank (6); the outlet of the last-level recovery water tank (11) is connected to the anti-backflow external transmission system. The backflow prevention system includes a condensate tank (13), the inlet of which is connected to the outlet of the last stage recovery tank (11), the outlet of which is connected to the inlet of the linkage pump (14), and the outlet of the linkage pump (14) is connected to the condensate network pipe (17) through a straight pipe section (15).

2. The multi-pressure level steam condensate recovery device for integrated utility tunnels in frigid regions according to claim 1, characterized in that: A level gauge (12) is installed on the condensate tank (13), and the level gauge (12) is a radar level gauge.

3. A multi-pressure level steam condensate recovery device for integrated utility tunnels in frigid regions according to claim 1, characterized in that: The series-connected water recovery tank group includes at least two stages of water recovery tanks.

4. A multi-pressure level steam condensate recovery device for integrated utility tunnels in frigid regions according to claim 1, characterized in that: The straight pipe section (15) is equipped with a one-way valve (16) at the end of the pipeline network to prevent water backflow in the condensate network pipe (17).

5. A multi-pressure level steam condensate recovery device for integrated utility tunnels in frigid regions according to claim 4, characterized in that: An automatic air vent valve (7) is installed on the condensate network pipe (17).

6. A multi-pressure level steam condensate recovery device for integrated utility tunnels in frigid regions according to claim 1, characterized in that: The condensate tank (13) is equipped with an electric on / off valve (18) at its inlet.

7. A multi-pressure level steam condensate recovery device for integrated utility tunnels in frigid regions according to claim 1, characterized in that: Each condensate drain valve group (4) is equipped with a bypass valve (5) in parallel.

8. A multi-pressure level steam condensate recovery device for integrated utility tunnels in frigid regions according to claim 1, characterized in that: The pressure buffer tank (6) is equipped with an automatic vent valve (7).

9. A multi-pressure level steam condensate recovery device for integrated utility tunnels in frigid regions according to claim 1, characterized in that: The outlet of the upper-level recycling tank in the series-connected recycling tank is connected to the inlet of the lower-level recycling tank. Water flows from the first-level recycling tank (8) into the last-level recycling tank (11) by gravity.

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