Pollution discharge flash tank device
By designing a sewage discharge and expansion container device containing a spray layer and circulation pipe, the problems of water vapor discharge, increase of wastewater and waste in high-enthalpy hot sewage discharge are solved, and the effects of energy saving, water saving and emission reduction are achieved.
Patent Information
- Application Number
- CN202421524772.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing high-enthalpy hot sewage discharge technology has problems such as water vapor "white smoke" discharge, increase in wastewater volume and waste of heat.
A sewage discharge and expansion container device is designed, including a spray layer and a circulation tube. The heat of high-enthalpy hot sewage is used to cool the external cold water through a circulation pump and heat exchanger, and the spray layer absorbs water vapor to reduce its emissions.
It effectively reduces the discharge of water vapor, saves water resources, avoids the increase in the amount of wastewater, and utilizes the heat in the sewage to achieve the effects of energy saving, water saving and emission reduction.
Smart Images
Figure CN222963931U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of high-enthalpy hot sewage drainage, and particularly relates to a high-enthalpy hot sewage drainage flash tank device with energy saving and water saving functions. Background Art
[0002] In the prior art, the high-enthalpy hot sewage drainage ensures that the discharged wastewater temperature meets the standard. After the high-enthalpy wastewater enters the drainage flash tank for expansion, the separated steam is directly discharged into the atmosphere through the exhaust pipe. At the same time, the separated sewage drops into the drain sump of the flash tank and is discharged after being cooled by mixing with normal-temperature industrial water.
[0003] Directly discharging the separated steam into the atmosphere will form "white smoke", which, although not polluting the atmospheric environment, has a poor visual effect. In the drain sump, normal-temperature industrial water is required to cool the sewage. On the one hand, it consumes industrial water resources, causing waste of water resources and actually increasing the amount of finally discharged wastewater, imposing more burden on the environment; on the other hand, the heat contained in the sewage is not effectively utilized, resulting in waste of heat. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide a flash tank device that reduces the discharge of water vapor "white smoke", reduces wastewater discharge, and can effectively utilize the heat in high-enthalpy hot sewage, overcoming the deficiencies of the prior art.
[0005] To solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A flash tank device includes a flash tank, a hot water main pipe connected to the side wall of the flash tank, and an exhaust pipe connected to the top of the flash tank. A drain sump is provided below the interior of the flash tank, and the bottom of the drain sump has an outlet pipe. The characteristics are that a spray layer is provided above the interior of the flash tank, and a circulation pipe with one end connected to the outlet pipe and the other end connected to the spray layer is further included. A circulation pump and a heat exchanger are provided on the circulation pipe. The heat medium pipe of the heat exchanger is connected to the circulation pipe, and the cold medium pipe is used to communicate with an external cold water pipe.
[0007] With the above technical solution, the high-enthalpy hot sewage flowing into the drain sump after expansion in the utility model is extracted by a circulating pipe for heat exchange. After heat exchange, on the one hand, the temperature of the sewage is reduced and supplied to the spray layer, and then the spray layer sprays the expanded water vapor to absorb the water vapor, reducing the emission of water vapor into the atmosphere, that is, reducing the discharge of "white smoke" and improving the visual perception. On the other hand, the heat in the sewage is provided to the external cooling water, increasing the temperature of the cooling water and making use of the heat. Moreover, the cooling water and the sewage are isolated from each other in the heat exchanger, and the amount of sewage will not increase. Thus, it can be seen that the utility model has the advantages of simple structure, low operation energy consumption and convenient operation, and can achieve the effects of energy conservation, water conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The present utility model will be described in detail below in conjunction with the drawings and specific embodiments:
[0009] Figure 1 It is a schematic structural diagram of the present utility model. SPECIFIC EMBODIMENTS
[0010] As Figure 1 shown, the sewage expansion vessel device of the present utility model includes a hot water main pipe 100, an expansion vessel 200, a circulating pipe 300, a circulating pump 400, a heat exchanger 500, an outlet pipe 600, a drain pipe 700, and an overflow pipe 800.
[0011] Among them, the hot water main pipe 100 is connected to the side wall of the expansion vessel 200 for inputting high-enthalpy wastewater into the expansion vessel 200. There is a drain sump 110 below the interior of the expansion vessel 100 and a spray layer 120 above the interior. An absorption zone 140 is formed between the drain sump 110 and the spray layer 120. The top of the expansion vessel 1 has an exhaust pipe 130.
[0012] The bottom of the drain sump 110 is communicated with the outlet pipe 600, and an outlet control valve 610 is provided at the outlet of the outlet pipe 600. One end of the circulating pipe 200 is connected to the outlet pipe 600, and the other end is connected to the spray layer 120. A circulating control valve 310, a circulating pump 400, and a heat exchanger 500 are successively provided on the circulating pipe 300 from the outlet pipe 600 to the spray layer 120. The heat medium pipe of the heat exchanger 500 is connected in the circulating pipe 510, and the cold medium pipe 520 is externally connected to the cold water pipe 530. In addition, a drain pipe 700 is connected to the pipe of the circulating pipe 300 between the circulating pump 400 and the spray layer 120. A drain control valve 710 is provided on the drain pipe 700. In the case of a high water level in the drain sump, the wastewater after cooling the cooling water can be directly discharged through the drain pipe 700 to quickly reduce the water level of the sump.
[0013] The overflow pipe 800 is also connected to the outlet pipe 600. The overflow pipe 800 has a bent section with the highest point at the water level warning line of the drain sump 110. When the outlet control valve 610 is closed, when the water volume in the drain sump 110 exceeds the water level warning line, the overflow pipe 800 can automatically discharge the excess sewage.
[0014] A liquid level gauge is provided on the side wall of the drain sump 110 to monitor the liquid level in the drain sump. Thermometers are respectively provided at positions in front of the hot medium pipe inlet and behind the outlet on the circulation pipe 400 and at a position behind the cold medium pipe outlet on the cold water pipe 530 to respectively monitor the inlet temperature of the wastewater flowing into the heat exchanger, the outlet temperature, and the outlet temperature of the cold water flowing out of the heat exchanger.
[0015] The above is the sewage expansion vessel device of the present utility model, and its working mode is as follows:
[0016] The high-enthalpy wastewater enters the expansion vessel 200 through the hot water main pipe 100. After the expansion of the expansion vessel 200, the liquid wastewater and gaseous water vapor are separated. Among them, the wastewater flows into the drain sump 110, and the water vapor rises. When the circulation control valve 310 is opened and the circulation pump 400 is started, the high-calorie wastewater in the drain sump 110 exchanges heat through the heat exchanger 500, and the heat in the flowing wastewater is used to heat the external cold water flowing through. On the one hand, the heat in the wastewater is effectively utilized. On the other hand, its own temperature decreases, forming the cooling water supplied to the spray layer 120. The spray layer 120 sprays the cooling water on the rising water vapor, so that the water vapor is absorbed by the cooling water in the absorption area 140 and falls back to the drain sump 110. In this way, the discharge of water vapor is reduced, the generation of "white smoke" that affects the appearance is reduced, and it is not necessary to add additional cooling water to the drain sump 110, reducing the consumption of water resources and avoiding increasing sewage discharge.
[0017] During the working process, if the wastewater in the drain sump 100 exceeds the set water level, the drain control valve 710 on the drain pipe 700 is opened to lower the water level of the drain sump and discharge the cooled wastewater. When the water level drops to the low level, the drain control valve 710 is closed again.
[0018] Through the above detailed description, it can be seen that the present utility model can reduce the discharge of water vapor "white smoke", reduce wastewater discharge, and can effectively utilize the heat in the high-enthalpy hot sewage, and can achieve the effects of energy conservation, water conservation, and emission reduction.
Claims
1. A sewage expansion tank device, comprising an expansion tank, a hot water main pipe connected to the side wall of the expansion tank, an exhaust pipe connected to the top of the expansion tank, a drain tank is provided at the bottom of the expansion tank, and an outlet pipe is provided at the bottom of the drain tank, characterized in that: A spray layer is provided above the inside of the expansion tank, and also includes a circulation pipe with one end connected to the outlet pipe and the other end connected to the spray layer. A circulation pump and a heat exchanger are provided on the circulation. The heat medium pipe of the heat exchanger is connected to the circulation pipe, and the cold medium pipe is used to connect with the external cold water pipe.
2. The sewage expansion tank device according to claim 1, characterized in that: A drainage pipe is also connected to the position of the circulation pipe behind the heat exchanger, and a drainage control valve is arranged on the drainage pipe.
3. The sewage expansion tank device according to claim 1, characterized in that: The outlet pipe is also connected to an overflow pipe, and the overflow pipe has a bending section with the highest point at the water level warning line of the drain tank.
4. The sewage expansion tank device according to claim 1, characterized in that: The circulation pipe is also provided with a circulation control valve.
5. The sewage expansion tank device according to claim 4, characterized in that: The circulation control valve, the circulation pump and the heat exchanger are arranged on the circulation pipe in sequence from the outlet pipe to the spraying layer.
6. The sewage expansion tank device according to claim 1, characterized in that: A liquid level gauge is arranged on the side wall of the drain tank.
7. The sewage expansion tank device according to claim 1, characterized in that: The circulation pipe is provided with a thermometer at a position in front of the heat medium pipe inlet and a position behind the outlet, respectively.
8. The sewage expansion tank device according to claim 1, characterized in that: A thermometer is arranged on the cold water pipe at a position behind the outlet of the cold medium pipe.