Device for converting heat storage polluted steam into new steam

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By using a system that dynamically stores polluted steam to convert it into fresh steam, and combining volumetric and indirect heat exchangers, the problem of low efficiency in rapidly supplying fresh steam in existing technologies is solved, achieving the effects of efficient utilization of thermal energy and reduced equipment costs.

CN223976009UActive Publication Date: 2026-03-06HANGZHOU BILI ENERGY SAVING TECH CO LTD

View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2025-04-08
Publication Date: 2026-03-06

AI Technical Summary

Technical Problem

Existing volumetric heat exchange systems are inefficient in rapidly supplying fresh steam, have large pressure differentials, low thermal energy utilization, are bulky and costly, and are difficult to effectively utilize low-pressure contaminated steam.

Method used

The system uses dynamic heat storage to convert polluted steam into fresh steam. It combines volumetric and indirect heat exchangers and controls them with parallel pipelines and valves to achieve rapid conversion and heat storage functions. It utilizes the heat exchange surfaces in the volumetric and indirect heat exchangers to exchange heat with the condensate tank.

Benefits of technology

It enables rapid conversion of polluted steam into fresh steam, improves thermal energy utilization, reduces equipment size and cost, has good operational stability, and has energy-saving and emission-reduction effects.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN223976009U_ABST

Patent Text Reader

Abstract

The utility model relates to a device for converting heat storage polluted steam into new steam, which belongs to the technical field of polluted steam treatment equipment and comprises a polluted steam conveying pipe and a condensate water tank, and a displacement heat exchanger and an indirect heat exchanger which are communicated through a parallel pipeline are arranged between the polluted steam conveying pipe and the condensate water tank. An indirect heat exchange face is arranged in the indirect heat exchanger, an indirect heat exchange connecting pipe is arranged between the indirect heat exchange face and the polluted steam conveying pipe, an indirect heat exchanger condensate pipe is arranged between the indirect heat exchange face and the condensate water tank, a displacement heat exchange pipe is arranged in the displacement heat exchanger, and a displacement heat exchange connecting pipe is arranged between the displacement heat exchange pipe and the polluted steam conveying pipe. A displacement heat exchanger condensate pipe is arranged between the displacement heat exchange pipe and the condensate water tank, and a heat storage new steam supply pipe communicated with the displacement heat exchanger is arranged at the upper end of the displacement heat exchanger. The system for converting the polluted steam into the fresh steam through dynamic heat storage is adopted, the polluted steam is rapidly converted into the fresh steam, and meanwhile the heat storage function is achieved.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the technical field of polluted steam treatment equipment, specifically to a device for converting heat-storing polluted steam into new steam. Background Technology

[0002] The existing method of converting polluted steam emitted from aerated concrete production into fresh steam through a volumetric heat exchange system is to use a volumetric heat exchange system to indirectly exchange the polluted steam. However, the volumetric heat exchange system has a large water capacity and requires preheating and heat storage. Often, when steam is needed, it cannot supply fresh steam quickly in a short time. The pressure difference between the supply steam pressure and the polluted steam is large, and the polluted steam cannot be fully utilized.

[0003] Because the current heat exchange system has a large water volume and a large amount of heat storage, it requires a long heating time. Therefore, the steam pressure loss and temperature difference are very large during heat storage. However, the pressure changes greatly during exhaust, and the high-pressure exhaust period is not long. The temperature and pressure inside the accumulator are always low. When the exhaust pressure and the heat storage pressure of the accumulator are balanced or the pressure difference is very small, it can no longer store heat and can only be forced to discharge.

[0004] While multi-stage thermal storage can recover some low-pressure steam, it takes a long time. Therefore, when using thermal storage to recover steam heat energy, the external steam supply pressure is low, it is difficult to quickly remove pollutants from the steam, and it is also difficult to utilize low-pressure polluted steam. To improve production efficiency, the low-pressure steam can only be discharged into the environment, resulting in significant heat loss and heavy pollution. Due to the large water volume of the equipment, the corresponding equipment is very large, heavy, and costly. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a device for converting stored polluted steam into fresh steam. This device features energy saving and emission reduction, good operational stability, and high thermal energy utilization. The system employs dynamic heat storage to convert polluted steam into fresh steam, achieving rapid conversion while also possessing heat storage capabilities.

[0006] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions:

[0007] A device for converting stored polluted steam into fresh steam includes a polluted steam delivery pipe and a condensate tank. A volumetric heat exchanger and an indirect heat exchanger are connected in parallel between the polluted steam delivery pipe and the condensate tank. The indirect heat exchanger contains an indirect heat exchange surface, and an indirect heat exchange connecting pipe is provided between the indirect heat exchange surface and the polluted steam delivery pipe. An indirect heat exchanger condensate pipe is provided between the indirect heat exchange surface and the condensate tank. The volumetric heat exchanger contains a volumetric heat exchange tube, and a volumetric heat exchange connecting pipe is provided between the volumetric heat exchange tube and the polluted steam delivery pipe. A volumetric heat exchanger condensate pipe is provided between the volumetric heat exchange tube and the condensate tank. A stored fresh steam supply pipe connected to the upper end of the volumetric heat exchanger is provided.

[0008] Preferably, a steam-water separator is provided between the volumetric heat exchanger and the indirect heat exchanger, a steam-water separator return water pipe is provided between the upper end of the indirect heat exchanger and the steam-water separator, a clean water supply pipe connected to the volumetric heat exchanger is provided on the side end of the volumetric heat exchanger, and a dynamic fresh steam supply pipe is provided at the upper end of the steam-water separator.

[0009] Preferably, the lower end of the volumetric heat exchanger and the lower end of the indirect heat exchanger are provided with volumetric heat exchanger circulating water pipes, and the lower end of the steam-water separator and the indirect heat exchanger are provided with a steam-water separator circulating water pipe connected to the volumetric heat exchanger circulating water pipe.

[0010] Preferably, the heat storage new steam supply pipe is equipped with a heat storage new steam supply valve, the dynamic new steam supply pipe is equipped with a dynamic new steam supply valve, and the dynamic circulation steam inlet pipe is equipped with a dynamic circulation switch valve I.

[0011] Preferably, the circulating water pipe of the volumetric heat exchanger is equipped with a volumetric heat exchanger circulating pump, and a heat storage circulation switch valve II connected to the circulating water pipe of the volumetric heat exchanger is provided between the circulating water pipe of the volumetric heat exchanger and the indirect heat exchanger. The circulating water pipe of the steam-water separator is equipped with an indirect heat exchange circulating pump, and a dynamic circulation switch valve II connected to the circulating water pipe of the steam-water separator is provided between the indirect heat exchange circulating pump and the indirect heat exchanger.

[0012] Preferably, the lower end of the volumetric heat exchanger is provided with a steam-water separator water supply pipe that is connected to the circulating water pipe of the volumetric heat exchanger, and a water supply pump is provided on the steam-water separator water supply pipe.

[0013] Preferably, a return water pipe for the volumetric heat exchanger is provided between the upper end of the volumetric heat exchanger and the upper end of the indirect heat exchanger, and a heat storage circulation switch valve I is provided on the return water pipe for the volumetric heat exchanger.

[0014] Preferably, the volumetric heat exchanger condensate pipe is equipped with a volumetric heat exchanger drain valve, and the indirect heat exchanger condensate pipe is equipped with an indirect heat exchanger drain valve.

[0015] This invention can achieve the following effects:

[0016] This invention provides a device for converting stored polluted steam into fresh steam. Compared with existing technologies, it features energy saving and emission reduction, good operational stability, and high thermal energy utilization. The system employs dynamic heat storage to convert polluted steam into fresh steam, achieving rapid conversion while also possessing heat storage capabilities.

[0017] Valves are installed in both the dynamic and thermal storage circulation systems. When steam is supplied, the valves of the thermal storage circulation system are closed to stop its operation, while the dynamic circulation system continues to run. When steam supply stops and thermal storage is needed, the valves of the dynamic circulation system are closed, the dynamic circulation pump stops, and the thermal storage circulation pump is activated for thermal storage. When steam is supplied to the container heat exchanger and water is supplied to the steam-water separator, the water level in the container drops, and the water makeup system automatically replenishes water to the volumetric heat exchanger. As the water level in the steam-water separator drops with the steam supply, the volumetric heat exchanger replenishes water to the steam-water separator, or the water makeup system can directly replenish water.

[0018] Polluted steam can be supplied to the volumetric heat exchanger and the indirect heat exchanger individually or simultaneously, or in series. That is, the volumetric heat exchanger is supplied first, and then the polluted steam from the outlet of the volumetric heat exchanger is supplied to the indirect heat exchanger, or vice versa. The condensate after heat exchange is discharged from the steam trap into the condensate tank for reuse as process water. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram: 1. Polluted steam delivery pipe; 2. Indirect heat exchange connection pipe; 3. Steam-water separator return water pipe; 4. Volumetric heat exchanger return water pipe; 5. Dynamic circulation switch valve I; 6. Dynamic fresh steam supply valve; 7. Dynamic fresh steam supply pipe; 8. Steam-water separator; 9. Steam-water separator makeup water pipe; 10. Thermal storage circulation switch valve I; 11. Thermal storage fresh steam supply pipe; 12. Thermal storage fresh steam supply valve; 13. Clean water makeup water pipe; 14. Volumetric heat exchanger; 15. Volumetric heat exchanger tube; 16. Makeup water pump 1 6. Volumetric heat exchanger drain valve 17. Volumetric heat exchanger circulating pump 18. Heat storage circulation switch valve II 19. Volumetric heat exchanger condensate pipe 20. Steam-water separator circulating water pipe 21. Condensate tank 22. Volumetric heat exchanger circulating water pipe 23. Indirect heat exchanger condensate pipe 24. Indirect heat exchanger circulating pump 25. Dynamic circulation switch valve II 26. Indirect heat exchanger drain valve 27. Volumetric heat exchanger connecting pipe 28. Indirect heat exchanger 29. Indirect heat exchange surface 30. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0022] Example: Figure 1 As shown, a device for converting stored polluted steam into new steam includes a polluted steam delivery pipe 1 and a condensate tank 22. A volumetric heat exchanger 14 and an indirect heat exchanger 29 are connected in parallel between the polluted steam delivery pipe 1 and the condensate tank 22. A volumetric heat exchanger return water pipe 4 is provided between the upper end of the volumetric heat exchanger 14 and the upper end of the indirect heat exchanger 29. A heat storage circulation switch valve I10 is provided on the volumetric heat exchanger return water pipe 4. The indirect heat exchanger 29 is provided with an indirect heat exchange surface 30. An indirect heat exchange connecting pipe 2 is provided between the indirect heat exchange surface 30 and the polluted steam conveying pipe 1. An indirect heat exchanger condensate pipe 24 is provided between the indirect heat exchange surface 30 and the condensate tank 22. The volumetric heat exchanger 14 is provided with a volumetric heat exchange tube 15. A volumetric heat exchange connecting pipe 28 is provided between the volumetric heat exchange tube 15 and the polluted steam conveying pipe 1. A volumetric heat exchanger condensate pipe 20 is provided between the volumetric heat exchange tube 15 and the condensate tank 22. A volumetric heat exchanger steam trap 17 is provided on the volumetric heat exchanger condensate pipe 20. An indirect heat exchanger steam trap 27 is provided on the indirect heat exchanger condensate pipe 24. A heat storage fresh steam supply pipe 11 connected to the volumetric heat exchanger 14 is provided at the upper end of the volumetric heat exchanger 14.

[0023] A steam-water separator 8 is provided between the volumetric heat exchanger 14 and the indirect heat exchanger 29. A steam-water separator return water pipe 3 is provided between the upper end of the indirect heat exchanger 29 and the steam-water separator 8. A clean water makeup water pipe 13 connected to the volumetric heat exchanger 14 is provided on the side end of the volumetric heat exchanger 14. A dynamic fresh steam supply pipe 7 is provided at the upper end of the steam-water separator 8. A volumetric heat exchanger circulating water pipe 23 is provided between the lower end of the volumetric heat exchanger 14 and the lower end of the indirect heat exchanger 29. A steam-water separator circulating water pipe 21 connected to the volumetric heat exchanger circulating water pipe 23 is provided between the lower end of the steam-water separator 8 and the indirect heat exchanger 29. A steam-water separator makeup water pipe 9 connected to the volumetric heat exchanger circulating water pipe 23 is provided between the lower end of the volumetric heat exchanger 14 and the steam-water separator 8. A makeup water pump 16 is provided on the steam-water separator makeup water pipe 9. A thermal storage new steam supply valve 12 is installed on the thermal storage new steam supply pipe 11, a dynamic new steam supply valve 6 is installed on the dynamic new steam supply pipe 7, and a dynamic circulation switch valve I5 is installed on the steam-water separator return water pipe 3. A volumetric heat exchanger circulation pump 18 is installed on the volumetric heat exchanger circulation water pipe 23, and a thermal storage circulation switch valve II19 connected to the volumetric heat exchanger circulation water pipe 23 is installed between the volumetric heat exchanger circulation pump 18 and the indirect heat exchanger 29. An indirect heat exchange circulation pump 25 is installed on the steam-water separator circulation water pipe 21, and a dynamic circulation switch valve II26 connected to the steam-water separator circulation water pipe 21 is installed between the indirect heat exchange circulation pump 25 and the indirect heat exchanger 29.

[0024] Working principle: Clean water is injected into the volumetric heat exchanger 14, and water is pumped into the steam-water separator 8 via the makeup water pump 16. Polluted steam enters the volumetric heat exchanger 14 and the indirect heat exchanger 29 through the polluted steam delivery pipe 1. After exchanging heat with the clean water in the heat exchanger through the volumetric heat exchange tubes 15 and the indirect heat exchange surface 30, the polluted steam condenses into condensate. The condensate is drained into the condensate tank 22 through the volumetric heat exchanger drain valve 17 and the indirect heat exchanger drain valve 27. The polluted steam heats the water in the heat exchanger, turning it into high-temperature, high-pressure water. When production does not require new steam, the valves of the dynamic circulation system are closed, the dynamic circulation pump is stopped, and the valves of the thermal storage circulation system are opened to start heating the clean water in the volumetric heat exchanger. The heated clean water is stored in the volumetric heat exchanger as high-temperature, high-pressure water. When needed, the valves of the thermal storage steam supply system are opened to supply steam.

[0025] When rapid steam supply is required, close the valves of the thermal storage circulation system, stop the operation of the thermal storage circulation pump, open the valves of the dynamic circulation system, start the dynamic circulation pump to heat the circulating clean water, and the clean water enters the indirect heater through the steam-water separator to be rapidly heated into high-temperature and high-pressure hot water. The high-temperature and high-pressure water enters the steam-water separator for flash steam-water separation to form new steam, which is then rapidly supplied through the steam supply system.

[0026] It achieves heat storage and dynamic conversion of polluted steam into new steam. When steam is not needed, it can be stored and utilized, and when steam is needed, it can be reused. It can also achieve rapid dynamic steam supply. Due to the large heat exchange area and small water volume, the temperature difference required for heat exchange is small. Therefore, the pressure difference between the steam supply pressure and the polluted steam is small, and the utilization rate of polluted steam is high.

[0027] In summary, this device for converting stored polluted steam into fresh steam features energy saving and emission reduction, good operational stability, and high thermal energy utilization. The system employing dynamic stored polluted steam to fresh steam conversion achieves rapid conversion of polluted steam into fresh steam while also possessing a heat storage function.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A device for converting contaminated steam into fresh steam by heat storage, characterized in that: The utility model relates to a heat exchanger, including contaminated steam delivery pipe (1) and condensate tank (22), contaminated steam delivery pipe (1) with condensate tank (22) between be provided with parallel type pipeline intercommunication volumetric heat exchanger (14) and indirect heat exchanger (29), indirect heat exchanger (29) in be provided with indirect heat exchange surface (30), indirect heat exchange surface (30) with contaminated steam delivery pipe (1) between be provided with indirect heat exchange connecting pipe (2), indirect heat exchange surface (30) with condensate tank (22) between be provided with indirect heat exchanger condensate pipe (24), volumetric heat exchanger (14) in be provided with volumetric heat exchange pipe (15), volumetric heat exchange pipe (15) with contaminated steam delivery pipe (1) between be provided with volumetric heat exchange connecting pipe (28), volumetric heat exchange pipe (15) with condensate tank (22) between be provided with volumetric heat exchanger condensate pipe (20), volumetric heat exchanger (14) upper end be provided with with volumetric heat exchanger (14) intercommunication heat storage new steam supply pipe (11).

2. A device for converting contaminated steam into fresh steam by heat storage according to claim 1, characterized in that: Volumetric heat exchanger (14) with indirect heat exchanger (29) between be provided with steam-water separator (8), indirect heat exchanger (29) upper end with steam-water separator (8) between be provided with steam-water separator backwater pipe (3), volumetric heat exchanger (14) side end be provided with with volumetric heat exchanger (14) intercommunication clean water make-up pipe (13), steam-water separator (8) upper end be provided with dynamic new steam supply pipe (7).

3. A device for converting contaminated steam into fresh steam by heat storage according to claim 2, characterized in that: Volumetric heat exchanger (14) lower end with indirect heat exchanger (29) lower end be provided with volumetric heat exchanger circulating water pipe (23), steam-water separator (8) lower end with indirect heat exchanger (29) between be provided with with volumetric heat exchanger circulating water pipe (23) intercommunication steam-water separator circulating water pipe (21).

4. A device for converting contaminated steam into fresh steam by heat storage according to claim 3, characterized in that: Heat storage new steam supply pipe (11) on be provided with heat storage new steam supply valve (12), dynamic new steam supply pipe (7) on be provided with dynamic new steam supply valve (6), steam-water separator backwater pipe (3) on be provided with dynamic circulating switch valve I (5).

5. A device for converting contaminated steam into fresh steam by heat storage according to claim 3, characterized in that: Volumetric heat exchanger circulating water pipe (23) on be provided with volumetric heat exchanger circulating pump (18), volumetric heat exchanger circulating pump (18) with indirect heat exchanger (29) between be provided with with volumetric heat exchanger circulating water pipe (23) pipeline intercommunication heat storage circulating switch valve II (19), steam-water separator circulating water pipe (21) on be provided with indirect heat exchange circulating pump (25), indirect heat exchange circulating pump (25) with indirect heat exchanger (29) between be provided with with steam-water separator circulating water pipe (21) pipeline intercommunication dynamic circulating switch valve II (26).

6. A device for converting contaminated steam into fresh steam by heat storage according to claim 3, characterized in that: Volumetric heat exchanger (14) lower end with steam-water separator (8) between be provided with with volumetric heat exchanger circulating water pipe (23) pipeline intercommunication steam-water separator make-up pipe (9), steam-water separator make-up pipe (9) on be provided with make-up pump (16).

7. A device for converting contaminated steam into fresh steam by heat storage according to claim 1, characterized in that: The volumetric heat exchanger (14) is provided with a volumetric heat exchanger return water pipe (4) between the upper end of the volumetric heat exchanger and the upper end of the indirect heat exchanger (29), and the volumetric heat exchanger return water pipe (4) is provided with a heat storage cycle switch valve I (10).

8. A device for converting contaminated steam into fresh steam by heat storage according to claim 1, characterized in that: The volumetric heat exchanger condensate pipe (20) is provided with a volumetric heat exchanger drain valve (17), and the indirect heat exchanger condensate pipe (24) is provided with an indirect heat exchanger drain valve (27).