Unpowered condensate water recovery system applied to steam heat exchange system
Through the unpowered condensate water recovery system, vacuum drainage and multi-stage filtration device are used to solve the problem of filter blockage caused by high condensate impurities, and efficient recycling and reuse of condensate water is achieved, reducing operating costs.
Patent Information
- Application Number
- CN202421672749.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the prior art, the filter is prone to clogging due to the high impurity content, and the recycling cost is high, making it difficult to achieve efficient reuse.
The unpowered condensate water recovery system is adopted, and the condensed water is introduced into the closed tank using the principle of vacuum drainage, and impurities are removed through multi-stage filtration devices and spray devices to realize the recycling and reuse of condensate water.
It realizes efficient filtration and reuse of condensate, reduces recycling costs, simplifies the filtration process, and improves the operating efficiency of the system.
Smart Images
Figure CN223191599U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of condensate recovery equipment, and particularly relates to a power-free condensate recovery system applied to a steam heat exchange system. Background Art
[0002] Currently, condensate from equipment such as heating heat exchangers and heaters is generally discharged locally. Because the condensate contains a large amount of impurities, it is not easy to make the filter too large, and the filter screen is quickly blocked and cannot be used. The recovery cost is high and the technical difficulty is great, which is not convenient for recycling.
[0003] Therefore, in view of the above problems, the utility model provides a power-free condensate recovery system applied to a steam heat exchange system. Content of the Utility Model
[0004] In order to overcome the deficiencies of the above-mentioned prior art and solve the problems of relatively high impurity content in condensate, inconvenient filtration and relatively high recovery cost, the utility model provides a power-free condensate recovery system applied to a steam heat exchange system. The specific technical solutions are as follows:
[0005] A power-free condensate recovery system applied to a steam heat exchange system includes a raw water heater and a heat exchanger; the inlets of the raw water heater and the heat exchanger are both connected to the outlet of the steam main pipeline; the outlets of the raw water heater and the heat exchanger are both connected to the inlet of the condensate low-level water tank through a condensate discharge pipe; the outlet of the condensate low-level water tank is connected to the inlet of a sealed tank through a drainage pipe; the outlet of the sealed tank is connected to the recovery port of a boiler water supply tank through a condensate recovery pipe; the water outlet of the boiler water supply tank is connected to the makeup water pipe of the steam heat exchange system;
[0006] Preferably, a filtering device and a spraying device are arranged in the sealed tank, and the spraying device is connected to the outlet of the drainage pipe.
[0007] Preferably, a water replenishing port is further arranged on the side wall of the sealed tank, and the water replenishing port is connected to a water inlet pipe; a water replenishing valve is arranged on the side of the water inlet pipe close to the sealed tank; an exhaust valve is further arranged on the top of the tank cover of the sealed tank.
[0008] [[ID=**28**]]Preferably, the filtering device includes a recovery rod fixed on the tank cover of the sealed tank and a plurality of circular filter meshes sleeved on the recovery rod at equal intervals from top to bottom. The plurality of filter meshes are abutted against the inner side wall of the sealed tank; a support rod is arranged at the bottom of the recovery rod.
[0009] Preferably, the spraying device includes a spraying disc, and the spraying disc is fixed at the bottom of the tank cover of the sealed tank; the water inlet of the spraying disc is connected to the outlet of the drainage pipe; a plurality of nozzles are arranged at equal intervals along the circumference at the bottom of the spraying disc.
[0010] Preferably, the low-position condensate water tank is arranged underground and the distance between the tank top and the ground surface is 20 - 40 cm; the vertical height from the top of the closed tank to the outlet of the low-position condensate water tank is ≤ 10 meters.
[0011] Also preferably, a first solenoid valve is arranged on one side of the drain pipe close to the low-position condensate water tank; a second solenoid valve is arranged on one side of the condensate water recovery pipe close to the boiler water supply tank; both the first solenoid valve and the second solenoid valve adopt 24V DC solenoid valves.
[0012] Also preferably, a liquid level sensor is arranged inside the low-position condensate water tank; the first solenoid valve, the second solenoid valve and the liquid level sensor are all electrically connected to the controller of the steam heat exchange system.
[0013] Further preferably, sealing rings are arranged at the contact positions between the tank cover of the closed tank and the recovery rod and the drain pipe.
[0014] Even further preferably, the filter screen is made of stainless steel material, and the screen hole sizes of the filter screen are 20 mesh, 40 mesh, 60 mesh and 80 mesh respectively from top to bottom.
[0015] Even more preferably, the closed tank is of a conical structure, and the volume of the closed tank is more than twice the volume of the drain pipe.
[0016] The beneficial effects of the present utility model are as follows:
[0017] The structure of the present utility model is simple, convenient and efficient. The vacuum drainage principle without power is used to introduce the condensate water into the closed tank, and then through the spraying device, it is evenly sprayed onto the surface of the filter screen, and impurities are removed by layer-by-layer and multi-stage filtration. Then, the condensate water after impurity removal is discharged into the boiler water supply tank to further supplement water to the steam heat exchange system, so as to achieve the purpose of recycling the condensate water. Description of the Drawings
[0018] The attached drawings constituting the specification of this application are used to provide a further understanding of this application and do not constitute an improper limitation to this application.
[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;
[0020] Figure 2 It is a schematic diagram of the internal structure of the closed tank of the present utility model;
[0021] In the figure, 1-steam main pipeline; 2-raw water heater; 3-heat exchanger; 4-condensate discharge pipe; 5-condensate low-level water tank; 6-drainage pipe; 61-first solenoid valve; 7-sealed tank; 71-exhaust valve; 72-recovery rod; 721-filter; 722-support rod; 73-spray plate; 8-water inlet pipe; 81-water supply valve; 9-condensate recovery pipe; 91-second solenoid valve; 10-boiler water supply tank; 11-water supply pipe. DETAILED DESCRIPTION
[0022] The specific implementation of an unpowered condensate water recovery system for a steam heat exchange system provided by the present invention will be further described in conjunction with the accompanying drawings and embodiments.
[0023] like Figure 1 As shown, a non-powered condensate recovery system for a steam heat exchange system includes a raw water heater 2 and a heat exchanger 3, both of which have inlets connected to the outlet of a steam main 1. The outlets of the raw water heater 2 and the heat exchanger 3 are connected to the inlet of a low-level condensate tank 5 via a condensate drain pipe 4. Preferably, the low-level condensate tank 5 is located underground with the top of the tank approximately 20 cm above the ground. The outlet of the low-level condensate tank 5 is connected to the inlet of a sealed tank 7 via a drainage pipe 6. A first solenoid valve 61 is provided on the side of the drainage pipe 6 near the low-level condensate tank 5. The outlet of the sealed tank 7 is connected to the recovery port of a boiler water supply tank 10 via a condensate recovery pipe 9. Preferably, a second solenoid valve 91 is provided on the side of the condensate recovery pipe 9 near the boiler water supply tank 10. The water outlet of the boiler water supply tank 10 is connected to the water supply pipe of the steam heat exchange system. The sealed tank 7 is also provided with a filtering device and a spraying device.
[0024] Preferably, both the first solenoid valve 61 and the second solenoid valve 91 are 24V DC solenoid valves.
[0025] Preferably, the side wall of the sealed tank 7 is further provided with a water supply port, which is connected to the water inlet pipe 8; a water supply valve 81 is provided on the side of the water inlet pipe 8 close to the sealed tank 7; and an exhaust valve 71 is also provided on the top of the lid of the sealed tank 7. Before use, the water supply valve 81 and the top exhaust valve 71 must be opened to inject water into the sealed tank 7 and exhaust the air until the sealed tank 7 is in a vacuum state, and then the water supply valve 81 and the exhaust valve 71 must be closed. It is worth noting that the volume of the sealed tank 7 should be at least twice the volume of the drainage pipe 6.
[0026] like Figure 2As shown, a filtering device and a spraying device are arranged in the closed tank 7. Among them, the filtering device includes a recovery rod 72 fixed on the cover of the closed tank 7 and a number of circular filter meshes 721 sleeved on the recovery rod 72 at equal intervals from top to bottom. The filter meshes 721 are in contact with the inner side wall of the closed tank 7. A support rod 722 is also arranged at the bottom of the recovery rod 72. During use, only the recovery rod 72 and at least four levels of filter meshes 721 sleeved on its surface need to be placed into the closed tank 7. When cleaning or replacement is needed, only the recovery rod 72 and the filter meshes 721 need to be lifted upward for cleaning and replacement. The support rod 722 can effectively prevent the filter meshes 721 from detaching from the bottom of the recovery rod 72.
[0027] The spraying device includes a spraying disc 73, and the spraying disc 73 is fixed at the bottom of the cover of the closed tank 7. The water inlet of the spraying disc 73 is connected to the outlet of the drainage pipe 6. A number of spray heads are arranged at equal intervals along the circumference at the bottom of the spraying disc 73. Condensate enters the water inlet of the spraying disc 73 through the drainage pipe 6, and then is evenly sprayed onto the surface of the lower filter meshes 721 through the spray heads at the bottom of the spraying disc 73, which can increase the contact area between the condensate and the filter meshes 721 and effectively improve the filtering effect.
[0028] Preferably, in order to ensure the smooth progress of the atmospheric pressure and vacuum principle, the vertical height from the top of the closed tank 7 to the outlet of the condensate low-level water tank 5 is ≤ 10 meters.
[0029] Further preferably, a liquid level sensor is arranged in the condensate low-level water tank 5. The first solenoid valve 61, the second solenoid valve 91 and the liquid level sensor are all electrically connected to the controller of the steam heat exchange system. When the liquid level sensor detects that the water level in the condensate low-level water tank 5 reaches the set water level, the liquid level sensor transmits a signal to the controller. At this time, the first solenoid valve 61 and the second solenoid valve 91 are opened simultaneously. The condensate enters the closed tank 7 through the drainage pipe 6 by using the vacuum principle and the pressure difference. The condensate is evenly sprayed onto the filter meshes 721 through the spraying disc 73, and then flows through the outlet at the bottom of the closed tank 7 through the condensate recovery pipe 91 into the recovery port of the boiler water supply tank 10 after being filtered level by level. Finally, water is supplied to the steam heat exchange system through the water supply pipe 11 to realize the recycling of the condensate. When the liquid level sensor detects that the water level in the condensate low-level water tank 5 is lower than the set water level, the liquid level sensor transmits a signal to the controller, and the first solenoid valve 61 and the second solenoid valve 91 are closed simultaneously. It should be noted here that the flow rates of the first solenoid valve 61 and the second solenoid valve 91 are the same.
[0030] Even more preferably, in order to ensure the overall airtight performance of the closed tank 7, sealing rings are arranged at the contact positions between the cover of the closed tank 7 and the recovery rod 72 and the drainage pipe 6. Sealing rings are also arranged at the contact position between the tank body and the cover of the sealed tank 7. The sealing rings include but are not limited to those made of rubber materials.
[0031] It should be noted that, in order to extend the service life of the filter screen 721, the filter screen 721 in the present utility model is made of stainless steel material, and the screen hole sizes of the four-stage filter screen 721 gradually decrease from top to bottom as 20 mesh, 40 mesh, 60 mesh and 80 mesh respectively, so the filtering effect is better.
[0032] The condensate low-level water tank 5 has a structure with an open top. Thus, when draining to the sealed tank 7, air will inevitably enter the sealed tank 7 during the process, but the gas occupancy should not be greater than 2 / 3 of the volume of the sealed tank 7. Otherwise, it is necessary to replenish water and exhaust air for the sealed tank 7 again to ensure the vacuum performance of the sealed tank 7 and smoothly complete the gravity drainage of the condensate.
[0033] The structure of the present utility model is simple, convenient and efficient. Compared with the traditional pump-pumping recovery method, the present utility model uses the principle of gravity drainage without power to introduce the condensate into the sealed tank for filtering and impurity removal, which can effectively save the electricity cost of condensate recovery; the sealed tank 7 is in an inverted conical shape, which is beneficial to the automatic abutment of the filter screen and is convenient for installation and disassembly; the condensate after multi-stage impurity removal is discharged into the boiler water supply tank to further replenish water to the steam heat exchange system, so as to achieve the purpose of condensate recovery and reuse and effectively save the operation cost of the system.
[0034] [[ID=??]]In the present utility model, terms such as "upper", "lower", "bottom", "top", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relational terms determined for the convenience of describing the structural relationship of each component or element of the present utility model, and do not specifically refer to the components or elements of the present utility model, and should not be construed as a limitation to the present utility model. Terms such as "connected" and "joined" should be understood in a broad sense, which can mean a fixed connection, an integral connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For those relevant scientific research or technical personnel in the field, the specific meanings of the above terms in the present utility model can be determined according to specific situations, and should not be construed as a limitation to the present utility model.
[0035] Certainly, the above description is not a limitation to the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present utility model should also belong to the protection scope of the present utility model. It seems there is a small error in the original text where the ID in line 11 is "??" instead of "11". I've translated it as presented but this should be corrected in the original.
Claims
1. A non-powered condensate recovery system for a steam heat exchange system, comprising a raw water heater and a heat exchanger; characterized in that: The inlets of the raw water heater and heat exchanger are both connected to the outlet of the steam main; the outlets of the raw water heater and heat exchanger are both connected to the inlet of the low-level condensate water tank via a condensate discharge pipe; the outlet of the low-level condensate water tank is connected to the inlet of the sealed tank via a drainage pipe; the outlet of the sealed tank is connected to the recovery port of the boiler water supply tank via a condensate recovery pipe; the water outlet of the boiler water supply tank is connected to the water supply pipe of the steam heat exchange system; A filtering device and a spraying device are provided in the sealed tank, and the spraying device is connected to the outlet of the drainage pipe.
2. The unpowered condensate recovery system for a steam heat exchange system according to claim 1, characterized in that: The side wall of the sealed tank is also provided with a water supply port, which is connected to the water inlet pipe; a water supply valve is provided on the side of the water inlet pipe close to the sealed tank; and an exhaust valve is also provided on the top of the tank cover of the sealed tank.
3. The unpowered condensate recovery system for a steam heat exchange system according to claim 1, characterized in that: The filtering device includes a recovery rod fixed on the cover of the sealed tank and a plurality of circular filter screens sleeved on the recovery rod at equal intervals from top to bottom, wherein the plurality of filter screens abut against the inner wall of the sealed tank; a supporting rod is provided at the bottom of the recovery rod.
4. The unpowered condensate recovery system for a steam heat exchange system according to claim 3, characterized in that: The spray device includes a spray plate fixed on the bottom of the tank cover of the sealed tank; the water inlet of the spray plate is connected to the outlet of the drainage pipe; and a plurality of spray heads are arranged at equal intervals along the circumferential direction on the bottom of the spray plate.
5. The unpowered condensate recovery system for a steam heat exchange system according to claim 4, characterized in that: The condensate low-level water tank is arranged underground and the top of the tank is 20 to 40 cm above the ground surface; The vertical height from the top of the sealed tank to the outlet of the condensate low-level water tank is ≤10 meters.
6. The unpowered condensate recovery system for a steam heat exchange system according to claim 1, characterized in that: A first solenoid valve is provided on the side of the drainage pipe close to the condensate low-level water tank; a second solenoid valve is provided on the side of the condensate recovery pipe close to the boiler water supply tank; both the first solenoid valve and the second solenoid valve are 24V DC solenoid valves.
7. The unpowered condensate recovery system for a steam heat exchange system according to claim 6, characterized in that: A liquid level sensor is provided in the condensed water low level tank; The first solenoid valve, the second solenoid valve and the liquid level sensor are all electrically connected to a controller of the steam heat exchange system.
8. The unpowered condensate recovery system for a steam heat exchange system according to claim 3, characterized in that: The contact points between the sealed tank cover, the recovery rod and the drainage pipe are all provided with sealing rings.
9. The unpowered condensate recovery system for a steam heat exchange system according to claim 3, characterized in that: The filter screen is made of stainless steel, and the mesh sizes of the filter screen are 20 mesh, 40 mesh, 60 mesh and 80 mesh from top to bottom respectively.
10. The unpowered condensate recovery system for a steam heat exchange system according to claim 2, characterized in that: The sealed tank is a conical structure, and the volume of the sealed tank is twice the volume of the drainage tube.