CN213929544U - Sealing device for preventing desalting water tank from being polluted - Google Patents
Sealing device for preventing desalting water tank from being polluted Download PDFInfo
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- CN213929544U CN213929544U CN202022657510.XU CN202022657510U CN213929544U CN 213929544 U CN213929544 U CN 213929544U CN 202022657510 U CN202022657510 U CN 202022657510U CN 213929544 U CN213929544 U CN 213929544U
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Abstract
The utility model relates to a prevent sealing device of demineralized water tank pollution, the demineralized water tank include warning pipe, blast pipe, box and inlet tube and outlet pipe of being connected with the box respectively, blast pipe one end be connected with the box, the other end communicates to the air, warning pipe one end be connected with the box, the other end is connected to the trench, the device includes water seal subassembly and filter assembly, the water seal subassembly set up in the trench, and be connected with the warning pipe, filter assembly and blast pipe fixed connection, compare with prior art, the utility model has the advantages of the reliability is high, simple installation, maintenance cost low.
Description
Technical Field
The utility model relates to a demineralized water tank sealing device especially relates to a sealing device who prevents the pollution of demineralized water tank.
Background
In order to ensure the safe operation of the unit, a certain amount of water must be stored in the demineralized water tank, and the demineralized water is stored in the demineralized water tank for 16-24 hours on average. Most of the existing desalination water tanks do not use any sealing method, as shown in fig. 1, the existing desalination water tank comprises an overflow pipe 11, an exhaust pipe 10, a tank body 9, and an inlet pipe 8 and an outlet pipe 12 which are respectively connected with the tank body 9, wherein one end of the exhaust pipe 10 is connected with the tank body 9, the other end is communicated to the air, one end of the overflow pipe 11 is connected with the desalination water tank 9, and the other end is connected to a trench 13. It is a simple tank structure, and the top is equipped with the downward exhaust return bend of U type to prevent that debris from getting into. The long-term use of the water tank without any sealing device inevitably causes the desalted water in the water tank to be polluted by carbon dioxide, oxygen and dust in the air, generates carbon-containing compounds, influences the quality of the desalted water, further accelerates the scaling corrosion of thermal equipment, and increases the contents of iron and copper in the water, so that the water tank without any sealing device is very necessary to be sealed.
At present, the common sealing modes of domestic and foreign power plant desalting water tanks comprise the following modes:
1. buffer water isolation method: the inlet and outlet of the water tank are connected to a connector at the bottom of the water tank, fresh water is preferentially used when water is used, and old water on the upper layer plays a role in isolation and buffering. The water tank is constantly intake and goes out water, and liquid disturbance is inevitable, but the buffer water district can't remain stable, and sealed effect can't guarantee, and the effect is limited, can't solve the root problem.
2. Sealing liquid sealing method: the sealing liquid with the specific gravity less than 1 is poured into the water tank, floats on the water surface, and separates water and air to achieve the effect of sealing and keeping water quality. The sealing liquid is polluted by dust and the like, so the sealing liquid needs to be replaced periodically, the method has high requirements on the sealing liquid, needs to have good chemical stability and cannot be dissolved in water, the main problem of the process is to reduce the cost of the sealing liquid, and domestic and foreign markets are rare.
3. The nitrogen method comprises the following steps: the air at the top of the water tank is replaced by clean nitrogen, so that the water in the water tank is not contacted with the outside, and the aim of keeping the water quality is fulfilled. Because the liquid level of the water tank is changed continuously and nitrogen needs to be supplemented and discharged continuously, the requirement on the reliability of safety facilities is high, and once the safety facilities fail, overhigh pressure or vacuum can be caused, so that equipment is damaged, a large amount of nitrogen is consumed, and the operation cost is high.
4. Plastic ball sealing method: a large number of specially-made hollow plastic pellets are put on the water surface, so that the contact between water and air is isolated, and the purpose of keeping the water quality is achieved. The technology is introduced into China in 20 actual 80 years, and most domestic power plants adopt the technology. The product solves the problem of gaps among the balls in design, the theoretical coverage rate is more than 95%, but the optimal arrangement cannot be achieved in actual operation, and in addition, the ball movement can be caused by liquid level fluctuation, so the sealing effect is not ideal.
5. Hard floating top sealing method: a set of floating roof is added in the water tank to separate the water surface of the water tank from air and enable the floating roof to float along with the descending or ascending of the water tank like a piston. The floating roof is divided into a soft floating roof and a hard floating roof, and the hard floating roof is provided with a metal floating roof and a steel frame foamed EPS floating roof. The water tank for installing the floating roof needs to be filled with water from below, and the structure of the water tank needs to be a straight cylinder type, so that the installation and the maintenance are inconvenient.
6. The air bag type soft floating roof sealing method comprises the following steps: the soft floating roof is the same as the hard floating roof and floats on the water surface like a piston. The soft floating roof is convenient to overhaul compared with a hard floating roof because of no hard support, the soft floating roof is provided with an air bag type floating roof and the like, but the air bag type floating roof is easy to leak air, and the floating roof sinks once the air bag leaks air, so that the sealing is damaged. And the air bag is difficult to overhaul after air leakage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a sealing device for preventing the pollution of the demineralized water tank, which has high reliability, simple and convenient operation and low maintenance cost, and aims at overcoming the defects existing in the prior art.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a prevent sealing device that demineralized water tank pollutes, the demineralized water tank include warning pipe, blast pipe, box and inlet tube and the outlet pipe of being connected with the box respectively, blast pipe one end be connected with the box, the other end communicates to the air, warning pipe one end be connected with the box, the other end is connected to the trench, the device includes water seal assembly and filtering component, water seal assembly set up in the trench, and with the warning union coupling, filtering component and blast pipe fixed connection.
The water seal assembly is added at the mouth of the overflow pipe connected with the trench, so that the air in the overflow pipe can be effectively isolated, and the effect of sealing and keeping water quality is achieved; the filtering component is additionally arranged at the outlet of the exhaust pipe, so that CO in the air entering the exhaust pipe can be effectively filtered2Removing and keeping the water quality unaffected.
Furthermore, the water seal assembly comprises a water storage tank and an overflow pipe extension section, the water storage tank is arranged in the trench and filled with demineralized water, one end of the overflow pipe extension section is connected with the overflow pipe, the other end of the overflow pipe extension section extends into the demineralized water in the water storage tank, and the liquid level of the demineralized water is higher than the pipeline outlet of the overflow pipe extension section.
Wherein, the sleeve pipe is a plastic sleeve pipe, the clapboard is a reticular plastic clapboard, and the reticular aperture is smaller than the minimum aperture through which the filtering agent can pass. The length of the sleeve is 20cm, and the thickness of the sleeve is 2 cm. The filtering agent is alkali asbestos particles and is used for filtering CO in air2. The blast pipe be the type of falling U blast pipe, the blast pipe extend section the bore the same with the blast pipe, sealing connection between the two, its cover is equipped with the sheathed tube mouth of pipe and the distance on ground is 1.5 m.
Further, the filtering component comprises an exhaust pipe extension section, a sleeve, a filtering agent and a partition plate, wherein one end of the exhaust pipe extension section is connected with the exhaust pipe, the sleeve is sleeved on the inner side of the other end of the exhaust pipe extension section, the filtering agent is filled in the sleeve, and the two partition plates are arranged at the upper end and the lower end of the sleeve respectively and used for fixing the filtering agent.
The caliber of the water storage tank is larger than that of the overflow pipe extension section and smaller than that of the trench pipeline. The demineralized water is water at the outlet of the boiler feed water treatment system. The water storage tank is filled with demineralized water.
Compared with the prior art, the utility model has the advantages of it is following:
1) the reliability is high: the utility model discloses in, the water seal subassembly of being connected with the overflow pipe is in the trench, does not receive external influence, is difficult to destroyed, long service life, and the water seal reliability is high, and the filter assembly who is connected with the blast pipe can the filtered air in CO2Can well remove CO completely2The effect of (3) is high in reliability;
meanwhile, in the utility model, the caliber of the overflow pipe is large enough, the caliber of the water storage tank is slightly larger than that of the overflow pipe, the demineralized water in the water storage tank is enough, the situation that water is evaporated to dryness hardly occurs, and the filtering agent is alkaline asbestos particles and is fixed between the two reticular clapboards, so that the water quality in the water tank is not influenced, and the reliability is further improved;
2) the operation is simple and convenient: for the water seal assembly, only enough demineralized water is required to be added into the water storage tank at the initial stage of putting into use, no other operation is required, for the filter assembly, only quantitative alkali asbestos particles are required to be added at one time, no other complex operation is required, and the operation is simple and convenient;
3) the maintenance cost is low: the water seal assembly is arranged in the trench, the main components are made of the same material as the trench pipeline, and the service life of the water seal assembly is the same as that of the trench pipeline, so that the water seal assembly is basically not damaged and does not need to be maintained; the filter assembly does not need any maintenance except that anti-freezing measures are required to be taken in winter, and the maintenance cost is low.
Drawings
FIG. 1 is a schematic view of a prior art seal structure for a demineralized water tank;
figure 2 is the utility model discloses demineralized water tank seal structure schematic diagram.
Wherein: 1. the device comprises a water storage tank, 2, an overflow pipe extension section, 3, demineralized water, 4, an exhaust pipe extension section, 5, a sleeve, 6, a filtering agent, 7, a partition plate, 8, a water inlet pipe, 9, a demineralized water tank, 10, an exhaust pipe, 11, an overflow pipe, 12, a water outlet pipe, 13 and a trench.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example (b):
as shown in FIG. 2, the utility model provides a sealing device for preventing demineralized water tank from polluting includes two parts, is water seal subassembly and filtering component respectively, and wherein, the water seal subassembly sets up in trench 13, and is connected with warning pipe 11 for sealed warning pipe 11, filtering component and blast pipe 10 fixed connection, CO for absorbing in the blast pipe 102。
The water seal assembly comprises a water storage tank 1 and an overflow pipe extension section 2, the water storage tank 1 is arranged in a trench 13 and is the same as the pipeline of the trench 13 in material, desalted water 3 is filled in the water storage tank, one end of the overflow pipe extension section 2 is hermetically connected with the overflow pipe 11, the other end of the overflow pipe extension section extends into the desalted water 3 of the water storage tank 1 and is the same as the overflow pipe 11 in material, the caliber of the desalted water is slightly larger than that of the overflow pipe 2 but smaller than that of the pipeline of the trench 13, the desalted water 3 refers to boiler makeup water of a power plant poured into the water storage tank 1, namely water at the outlet of a boiler makeup water treatment system, the liquid level of the desalted water is higher than that of the pipeline outlet of the overflow pipe extension section 2, and the water storage tank 1 is preferably filled.
The filtering component comprises an exhaust pipe extension section 4, a sleeve 5, a filtering agent 6 and a partition plate 7, the exhaust pipe 10 of the demineralized water tank is an inverted U-shaped exhaust pipe, the caliber and the material of the exhaust pipe extension section 4 are the same as those of the exhaust pipe 10, one end of the exhaust pipe extension section is hermetically connected with the exhaust pipe 10, the other end of the exhaust pipe extension section is 1.5m away from the ground, the sleeve 5 is a plastic sleeve, the length of the sleeve is 20cm, the thickness of the sleeve is 2cm, the fixed sleeve is arranged on the inner side of the end part, close to the ground, of the exhaust pipe extension section 4, and the filtering agent 6 is filled in the sleeve 52The partition board 7 is a net-shaped plastic partition board, and is provided with two sheets, which are respectively positioned at the upper end and the lower end of the sleeve 5 and used for fixing the filtering agent 6, wherein the net-shaped aperture of the partition board is smaller than the minimum aperture through which the filtering agent 6 can pass.
The utility model discloses a theory of operation does:
when the water level of the box body 9 of the demineralized water tank is overhigh, water overflows from the overflow pipe 11 and is discharged, and the water tank automatically exhausts the air in the water tank, so that the sealing effect is naturally achieved; however, when the demineralized water tank body 9 is in the unfilled state for most of the time, a certain amount of air is inevitably generated therein, and the air enters from the exhaust pipe 10 and the overflow pipe 11 through the trench 13, so that it is considered that the air inlets are sealed.
Firstly, the overflow pipe 11 is connected with the overflow pipe extension section 2 to the trench 13, a water storage tank 1 which has the same material with the pipeline of the trench 13 is arranged at the periphery of the overflow pipe, the size of the water storage tank is suitable for being placed into the trench 13, the depth of the water storage tank 1 is slightly smaller than the diameter of the trench 3, outlet water of a mixed bed of a boiler feedwater treatment system, namely desalted water 3, is injected into the water storage tank, the water injection amount is suitable for filling the tank, and because the diameter of the overflow pipe 11 is large, the condition that water in the water storage tank 1 is evaporated to dryness does not need to be considered basically, the sealing of the overflow pipe 11 can be realized, and the water quality is not influenced by air in the pipe section.
Secondly, the exhaust pipe 10 is connected with the exhaust pipe extension 4, the tail part of the exhaust pipe is connected with a section of sleeve 5 internally provided with a filtering agent 6, and the filtering agent 6, preferably alkali asbestos particles, absorbs carbon dioxide in the air, so that the carbon dioxide cannot enter a water tank, the water quality is ensured to be stable, and meanwhile, the filtering agent 6 in the exhaust pipe is replaced periodically.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a prevent sealing device that demineralized water tank pollutes, demineralized water tank include overflow pipe (11), blast pipe (10), box (9) and inlet tube (8) and outlet pipe (12) be connected with box (9) respectively, blast pipe (10) one end be connected with box (9), the other end communicates to the air, overflow pipe (11) one end be connected with box (9), the other end is connected to trench (13), its characterized in that, the device include water seal assembly and filter assembly, water seal assembly set up in trench (13), and be connected with overflow pipe (11), filter assembly and blast pipe (10) fixed connection.
2. The sealing device for preventing the contamination of the demineralized water tank according to claim 1, characterized in that said water sealing assembly comprises a water storage tank (1) and an overflow pipe extension section (2), said water storage tank (1) is arranged in a trench (13) and filled with demineralized water (3), one end of said overflow pipe extension section (2) is connected with an overflow pipe (11), the other end extends into the demineralized water (3) of the water storage tank (1), the liquid level of said demineralized water (3) is higher than the pipe outlet of the overflow pipe extension section (2).
3. The sealing device for preventing the pollution of the demineralized water tank according to claim 1, wherein the filtering component comprises an exhaust pipe extension section (4), a sleeve (5), a filtering agent (6) and a partition plate (7), one end of the exhaust pipe extension section (4) is connected with the exhaust pipe (10), the sleeve (5) is sleeved on the inner side of the other end of the exhaust pipe extension section (4), the filtering agent (6) is filled in the sleeve (5), and the partition plate (7) is provided with two pieces which are respectively arranged at the upper end and the lower end of the sleeve (5) and used for fixing the filtering agent (6).
4. A sealing device for preventing pollution of a demineralized water tank according to claim 2, characterized in that said overflow pipe extension (2) has the same diameter as the overflow pipe (11), and is connected with the overflow pipe in a sealing way, and the diameter of said water storage tank (1) is larger than the diameter of the overflow pipe extension (2) and smaller than the pipe diameter of the trench (13).
5. A sealing device against contamination of a demineralized water tank according to claim 2, characterised in that said demineralized water (3) is water at the outlet of the boiler makeup water treatment system.
6. A sealing device against contamination of a demineralized water tank according to claim 2, characterised in that said water storage tank (1) is filled with demineralized water (3).
7. A sealing device against contamination of a demineralized water tank according to claim 3, characterised in that said sleeve (5) is a plastic sleeve and said partition (7) is a plastic mesh partition with mesh pore size smaller than the smallest pore size through which the filtering agent (6) can pass.
8. A sealing device against contamination of a demineralized water tank according to claim 7, characterised in that said filtering agent (6) is alkaline asbestos particles for filtering CO in the air2。
9. A sealing device against contamination of a demineralized water tank according to claim 3, characterised in that said sleeve (5) has a length of 20cm and a thickness of 2 cm.
10. A sealing device for preventing the contamination of a demineralized water tank according to claim 3, characterized in that said exhaust pipe (10) is an inverted U-shaped exhaust pipe, said exhaust pipe extension (4) has the same diameter as the exhaust pipe (10), and is connected with the exhaust pipe (10) in a sealing way, and the distance between the pipe opening of the sleeve (5) and the ground is 1.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022657510.XU CN213929544U (en) | 2020-11-17 | 2020-11-17 | Sealing device for preventing desalting water tank from being polluted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022657510.XU CN213929544U (en) | 2020-11-17 | 2020-11-17 | Sealing device for preventing desalting water tank from being polluted |
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| Publication Number | Publication Date |
|---|---|
| CN213929544U true CN213929544U (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022657510.XU Active CN213929544U (en) | 2020-11-17 | 2020-11-17 | Sealing device for preventing desalting water tank from being polluted |
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| CN (1) | CN213929544U (en) |
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- 2020-11-17 CN CN202022657510.XU patent/CN213929544U/en active Active
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