Foam discharging device for cleaning water tank
By setting up foam discharge devices with straight-discharge pipes and plug-in valves above the water tank, the problem of foam overflow during the reverse osmosis membrane cleaning is solved, and the alkaline liquid is prevented from harming the equipment and the ground, achieving a safer and water-saving cleaning effect.
Patent Information
- Application Number
- CN202421301727.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-07
AI Technical Summary
In the water-making equipment of thermal power plants, the reverse osmosis membrane easily accumulates scale at low temperatures, resulting in a large amount of foam produced during chemical cleaning. The foam contains alkaline substances, which easily overflows and causes irreversible damage to surrounding equipment and the ground.
A foam discharge device for cleaning water tanks is designed. By setting up a straight-discharge pipe and a plug-in valve above the water tank, the foam in the water tank is introduced into the straight-discharge pipe using negative pressure, and discharged into the trench through the inclined straight-discharge pipe to avoid foam overflow.
It effectively prevents foam from overflowing from the exhaust port, avoids damage to peripheral equipment by alkaline liquid, reduces the pressure of cleaning and maintenance, and saves water resources.
Smart Images
Figure CN222556635U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water tank cleaning, in particular to a foam discharge device for cleaning a water tank. Background Art
[0002] In the daily production of thermal power generation, water production equipment is of vital importance. The quality of water directly determines the service life of the boiler. Commonly used water production equipment is multi-media filter - primary reverse osmosis device - secondary reverse osmosis device - EDI desalting water device. Multi-media filter is a kind of solid particles with strong adsorption such as activated carbon and quartz sand on the bottom for preliminary filtration of raw water. The primary and secondary reverse osmosis devices use reverse osmosis membranes to filter the upper raw water, which can filter out impurities leaked in the multi-media filter. The EDI desalting water device uses special resins to wrap the charged ions in the water to make them lose their conductive properties, thereby extending the service life of the boiler pipes.
[0003] During the continuous operation of the water-making equipment, the reverse osmosis membrane in the primary and secondary reverse osmosis devices will accumulate more and more impurities as the use time increases. Especially in late autumn, winter and early spring, when the temperature is low and the conductivity is high, a large amount of scale will appear in the reverse osmosis membrane. Although the water-making equipment has a backwash system, it is difficult to clean out the large scale in the reverse osmosis membrane. Therefore, a chemical cleaning system is required to clean the reverse osmosis membrane with chemical drugs.
[0004] The chemical EDTA is a common industrial cleaning agent. It will produce a lot of foam during the cleaning process. The drug needs to be used under alkaline conditions, so it is normally used with liquid alkali and defoaming agent. Even if the defoaming agent is added, a lot of foam will still be produced during the actual cleaning process. Under normal circumstances, the foam will accumulate inside the cleaning water tank, but when the cleaning section is switched and the equipment is stopped, the pressure at the water outlet drops sharply and the return water volume increases, which will squeeze the foam inside the cleaning water tank upward and emerge from the exhaust hole. The foam will scatter within 5 meters around the cleaning water tank in a very short time. Since the cleaning agent EDTA needs to be used with strong alkali, the scattered foam contains alkalinity. Long-term use will cause irreversible damage to the ground and surrounding equipment. Utility Model Content
[0005] The purpose of the utility model is to provide a foam discharge device for cleaning a water tank, aiming to solve the problems mentioned in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the foam discharge device for cleaning the water tank comprises a multi-media filter device and a water tank, the water tank has a return pipe and an outlet pipe, the upper part of the water tank is provided with an exhaust port and a dosing port, the upper end of one side of the water tank is provided with a straight discharge pipe, the straight discharge pipe is inclined downward, a gate valve is provided between the straight discharge pipe and the water tank, an intermediate pipe is also provided on the straight discharge pipe, the multi-media filter device has a drainage port for discharging unqualified water, the intermediate pipe is through-connected with the drainage port of the multi-media filter device, and a drain valve is provided on the intermediate pipe.
[0007] Preferably, the exhaust port is located on one side of the straight exhaust pipe.
[0008] Preferably, it also includes a recovery pool for storing unqualified water and foam discharged from the direct discharge pipe.
[0009] Preferably, a liquid level sensor and a water pump are provided inside the recovery pool, and the recovery pool also includes a sewage station. The water pump is used to transport unqualified water and foam in the recovery pool to the sewage station.
[0010] The beneficial effects of the utility model are:
[0011] The foam in the water tank cannot overflow from the exhaust port, thereby eliminating the damage caused by the alkaline liquid to the surrounding equipment, and also reducing the pressure on employees to clean the floor and maintain the surrounding equipment, with good use effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of a specific embodiment of the utility model.
[0013] In the figure: 1. Multi-media filtration equipment; 2. Water tank; 3. Return pipe; 4. Outlet pipe; 5. Exhaust port; 6. Dosing port; 7. Direct discharge pipe; 8. Gate valve; 9. Intermediate pipe; 10. Drain port; 11. Drain valve; 12. Recovery tank; 13. Liquid level sensor; 14. Water pump; 15. Sewage station. DETAILED DESCRIPTION
[0014] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.
[0015] like Figure 1As shown, a foam discharge device for cleaning a water tank comprises a multi-media filtering device 1 and a water tank 2. The water tank 2 has a return pipe 3 and a water outlet pipe 4. An exhaust port 5 and a dosing port 6 are arranged on the upper portion of the water tank 2. A straight discharge pipe 7 is arranged at the upper end of one side of the water tank 2. The straight discharge pipe 7 is arranged obliquely downward. A gate valve 8 is arranged between the straight discharge pipe 7 and the water tank 2. An intermediate pipe 9 is also arranged on the straight discharge pipe 7. The multi-media filtering device 1 has a drainage port 10 for discharging unqualified water. The intermediate pipe 9 is connected to the drainage port 10 of the multi-media filtering device 1. A drain valve 11 is arranged on the intermediate pipe 9.
[0016] The exhaust port 5 of the water tank 2 is in a normally open state, and the dosing port 6 is in a normally closed state. A threaded sealing plug is provided at the dosing port 6 of the water tank 2. By opening the sealing plug, the cleaning agent can be added into the water tank 2. After the cleaning agent is added, the dosing port 6 needs to be closed by the sealing plug to prevent the foam generated in the water tank 2 from overflowing to the outside of the water tank 2 through the dosing port 6.
[0017] The existing water-making equipment has a backwash system inside, and the backwash system has a water inlet and a drain. The water in the water tank 2 is transported to the inside of the backwash system through the water inlet of the backwash system, and the reverse osmosis membrane is cleaned. The cleaned water enters the return pipe 3 through the drain of the backwash system, and flows back into the water tank 2 through the return pipe 3, so as to facilitate the recycling of clean water.
[0018] Since the backwash system generates a large amount of foam during the cleaning process, the foam will enter the water tank 2 through the return pipe 3. As the foam in the water tank 2 continues to accumulate, the foam is easily discharged from the exhaust port 5. After the multi-media filter in the water production equipment performs a preliminary filtration on the raw water through solid particles with strong adsorption such as activated carbon quartz sand, unqualified water will be transported to the inside of the direct discharge pipe 7 through the intermediate pipe 9. The gate valve 8 is used to control the water in the water tank 2 and the foam to enter the direct discharge pipe 7. The drain valve 11 is used to control the unqualified water discharged by the multi-media filter to enter the direct discharge pipe 7. When the gate valve 8 and the drain valve 11 are both After opening, the unqualified water discharged from the multi-media filter is transported to the direct discharge pipe 7 through the intermediate pipe 9. Since the direct discharge pipe 7 is inclined, the unqualified water that has been preliminarily filtered flows downward under the action of gravity and is discharged to the ditch through the direct discharge pipe 7. In this state, the external air can only enter the interior of the water tank 2 through the exhaust port 5. After the drain valve 11 is opened, the external gas will enter the water tank 2 through the exhaust port 5, and negative pressure will be generated in the direct discharge pipe 7. The foam in the water tank 2 will enter the direct discharge pipe 7 under the action of the negative pressure and be discharged into the ditch. The foam will not overflow to the outside of the water tank 2 through the exhaust port 5.
[0019] Since the unqualified water that has been initially filtered by the multi-media filter is originally discharged directly into the ditch, the unqualified water in the direct discharge ditch is utilized here to generate negative pressure in the direct discharge pipe 7, thereby transporting the foam in the water tank 2 out of the direct discharge pipe 7, without using additional water resources, thereby reducing the waste of water resources.
[0020] Furthermore, the exhaust port 5 is located on one side of the direct discharge pipe 7. The closer the distance between the exhaust port 5 and the direct discharge pipe 7 is, the easier it is for the foam closer to the exhaust port 5 to be sucked away by the direct discharge pipe 7, thereby preventing the accumulation of foam at the exhaust port 5 and effectively preventing the foam from overflowing from the exhaust port 5 to the outside of the water tank 2.
[0021] Furthermore, it also includes a recovery pool 12 for storing unqualified water and foam discharged from the direct discharge pipe 7. The direct discharge pipe 7 can first discharge the unqualified water and foam into the ditch, and then transport them to the recovery pool 12 through the ditch. The unqualified water and foam can also be directly discharged into the recovery pool 12 through the direct discharge pipe 7. Through the recovery pool 12, the unqualified water and foam can be stored for a certain period of time to facilitate natural defoaming and subsequent processing.
[0022] Furthermore, a liquid level sensor 13 and a water pump 14 are provided inside the recovery pool, and also includes a sewage station 15. The water pump 14 is used to transport unqualified water and foam in the recovery pool to the sewage station 15. The unqualified water and foam contain chemicals, and therefore need to be processed by the sewage station 15. When the liquid level in the recovery pool is high and triggers the height value set by the liquid level sensor 13, the water pump 14 automatically starts and pumps water from the bottom of the recovery pool to the sewage station 15 for processing. When the liquid level in the recovery pool drops to a certain height, the liquid level sensor 13 is triggered again, so that the water pump 14 can be turned off.
[0023] The foam in the water tank 2 cannot overflow from the exhaust port 5, thereby eliminating the damage caused by the alkaline liquid to the peripheral equipment, and also reducing the pressure on employees to clean the floor and maintain the peripheral equipment, and the use effect is good.
[0024] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
Claims
1. A foam discharge device for cleaning a water tank, characterized in that: The invention comprises a multi-media filter device (1) and a water tank (2), wherein the water tank (2) has a return pipe (3) and a water outlet pipe (4), an air outlet (5) and a drug adding port (6) are arranged at the upper part of the water tank (2), a straight discharge pipe (7) is arranged at the upper end of one side of the water tank (2), the straight discharge pipe (7) is arranged obliquely downward, a gate valve (8) is arranged between the straight discharge pipe (7) and the water tank (2), an intermediate pipe (9) is also arranged on the straight discharge pipe (7), the multi-media filter device (1) has a drainage port (10) for discharging unqualified water, the intermediate pipe (9) is connected to the drainage port (10) of the multi-media filter device (1), and a drain valve (11) is arranged on the intermediate pipe (9).
2. The foam discharge device for cleaning a water tank according to claim 1, characterized in that: The exhaust port (5) is located on one side of the straight exhaust pipe (7).
3. The foam discharge device for cleaning a water tank according to claim 2, characterized in that: It also includes a recovery pool (12) for storing unqualified water and foam discharged from the direct discharge pipe (7).
4. The foam discharge device for cleaning a water tank according to claim 3, characterized in that: The recovery pool is provided with a liquid level sensor (13) and a water pump (14) inside, and also includes a sewage station (15). The water pump (14) is used to transport unqualified water and foam in the recovery pool to the sewage station (15).