CN215372416U - Automatic recovery unit of thermodynamic system row-fixing cooling pond drainage - Google Patents
Automatic recovery unit of thermodynamic system row-fixing cooling pond drainage Download PDFInfo
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- CN215372416U CN215372416U CN202120631333.XU CN202120631333U CN215372416U CN 215372416 U CN215372416 U CN 215372416U CN 202120631333 U CN202120631333 U CN 202120631333U CN 215372416 U CN215372416 U CN 215372416U
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Abstract
本实用新型公开了一种热力系统定排冷却池排水自动回收装置，其特征是，泵出口管线(1依次通过离心泵(2)、进口管线(12)连接自吸罐(3)；所述自吸罐(3)连通有进口吸入管线(4)；包括与定排冷却池(33)连接的液位自动控制系统(5)；所述自吸罐(3)连通有补水管线(13)，所述自吸罐罐体(15)下部与底排管线(19)连接，上部与溢流管线(17)连接；所述底排管线(19)上设置放水阀(18)、溢流观察口(20)，所述溢流管线(17)上设置溢流阀(16)。本实用新型结构操作简单、建造成本低、工作可靠性高，既能达到自动控制和管道防冻，又能降低操作人员工作量，实现真正意义的降能降耗、优化系统。
The utility model discloses an automatic water recovery device for fixed-row cooling pool drainage of a thermal system, which is characterized in that a pump outlet pipeline (1) is connected to a self-priming tank (3) through a centrifugal pump (2) and an inlet pipeline (12) in sequence; The self-priming tank (3) is communicated with an inlet suction line (4); it includes an automatic liquid level control system (5) connected with a fixed-row cooling pool (33); the self-priming tank (3) is connected with a water replenishing pipeline (13) , the lower part of the self-priming tank body (15) is connected with the bottom discharge pipeline (19), and the upper part is connected with the overflow pipeline (17); The port (20) is provided with an overflow valve (16) on the overflow pipeline (17). The utility model has the advantages of simple structure and operation, low construction cost and high work reliability, which can not only achieve automatic control and pipeline antifreeze, but also reduce The workload of operators can be realized in a real sense to reduce energy consumption and optimize the system.
Description
Technical Field
The utility model relates to the technical field of coal chemical industry recovery devices, in particular to an automatic recovery device for the drainage of a constant-drainage cooling pool of a thermodynamic system, which is applied to the recovery and utilization of the cooling water of the constant-drainage cooling pool provided with the constant-drainage system in a coal chemical industry self-contained power plant and a thermodynamic power plant.
Background
Water is an important spontaneous combustion resource, is a necessary resource for human survival and social development, and the form of water resource shortage is increasingly serious along with the development of social economy. Especially in recent years, the rapid development of industry causes the rapid increase of water resource consumption, and the national strength of controlling the water resource of industrial water is also increased: the prices of underground water, yellow river water, reservoir water and water in sewage treatment plants are gradually increased, and meanwhile, a series of control measures such as collection of sewage discharge cost by using the underground water, the yellow river water, the reservoir water and a sewage treatment company cause the water consumption cost of enterprises and unit water consumption to be increased sharply. Therefore, the reasonable recycling of the sewage discharged from the self-contained power plant in the chemical enterprises is of great significance. At present, the condensate of a fixed-discharge flash tank is directly discharged into a fixed-discharge cooling pool in the fixed-discharge system of a self-contained power plant of domestic chemical enterprises, and the cooled water is overflowed into the fixed-discharge cooling pool to a reuse water device for secondary treatment and then is sent to a raw water pool for recycling. However, the cooling water of the fixed-discharge cooling pool is a mixture of steam condensate and raw water, the water quality requirement of the cooling water is higher than that of the raw water, and the cooling water is discharged to reuse water and then mixed with the discharge water of a chemical system to be treated again, so that a large amount of chemical agents and power consumption are consumed, and resource waste is caused.
In the boiler fixed-discharge system, the high-temperature high-pressure steam of the fixed-discharge flash tank comes from the internal leakage of a part of valves of a boiler continuous sewage system, a periodic sewage system and a boiler water system, and the total amount is about 5t/h, the average temperature is about 130 ℃ and the pressure is 0.25 MPa. After water (steam) from each path of the fixed-discharge flash tank is converged into a main inlet pipe of the fixed-discharge flash tank and enters the fixed-discharge flash tank for flash evaporation, condensate at about 80 ℃ automatically flows into a fixed-discharge cooling pool and is cooled again, and uncondensed steam is directly discharged to the atmosphere through an emptying pipeline. In order to effectively recycle the steam discharged as the atmosphere after flash evaporation and avoid heat and water resource waste, in the prior art, a spraying desuperheater is additionally arranged on the technical improvement of an inlet main pipe of a fixed-discharge flash tank, a desuperheating water source uses raw water to cool water entering the fixed-discharge flash tank in advance, but the water discharge of the fixed-discharge flash tank is increased after the technical improvement to reach 40 t/h. In order to directly recycle the water with the quality higher than that of the raw water by 40t/h in the fixed-row cooling pond to the raw water pond, an automatic recycling device is required to continuously operate, otherwise, the resource waste still exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an automatic drainage recovery device for a fixed-row cooling pool of a thermodynamic system, which overcomes the problems in the prior art, can effectively recover cooling water of the fixed-row cooling pool, simultaneously achieves automatic control, avoids the problem that high-quality water in the fixed-row cooling pool is discharged to a secondary treatment link of a reuse water device due to untimely manual operation, finally realizes the rational utilization of the fixed-row cooling water, and achieves the purposes of energy conservation, emission reduction and consumption reduction.
The technical problem to be solved by the utility model is realized by the following technical scheme:
an automatic drainage recovery device for a constant-displacement cooling pond of a thermodynamic system is characterized by comprising an outlet pipeline of a pump, wherein the outlet pipeline of the pump is connected with a self-priming tank through a centrifugal pump; a suction pipeline at the inlet of the self-priming tank is communicated with the self-priming tank; the device also comprises a liquid level automatic control system connected with the fixed row cooling pool;
the outlet pipeline of the pump is provided with a local pressure gauge, a local thermometer, a pump outlet water discharge pipeline, a pump outlet manual valve and a pump outlet check valve;
the self-sucking tank is communicated with a water replenishing pipeline, and a water replenishing valve is arranged on the water replenishing pipeline; the lower part of the self-priming tank body is connected with a bottom discharge pipeline, and the upper part of the self-priming tank body is connected with an overflow pipeline; the bottom discharge pipe line is provided with a water drain valve and an overflow observation port, and the overflow pipe line is provided with an overflow valve. An inlet filter screen is arranged on the inlet suction pipeline of the self-sucking tank;
the liquid level automatic control system comprises an in-situ magnetic turning plate liquid level meter which is connected with the in-situ control box through a liquid level control loop; and a liquid level control switch and the floating ball of the magnetic turning plate liquid level meter are arranged on the in-situ magnetic turning plate liquid level meter and suspend and drain the surface of the cooling water in the pond in the running process.
The outlet pipeline of the centrifugal pump is provided with a water discharge pipeline close to the low point of the outlet of the pump, the water discharge valve is opened a little during the operation process, and the water is led to the fixed-discharge cooling pool by the rubber tube, so that the water of the outlet pipeline of the pump continues to slowly flow to enter the fixed-discharge cooling pool after the pump is stopped in winter, and the anti-freezing effect is achieved.
The fixed-discharge flash tank is connected with a desuperheating water pipeline; and the temperature reduction water pipeline and the fixed-row flash tank inlet main pipe spray water pipeline are mixed at the temperature reducer for temperature reduction. And the water after the temperature reduction in the fixed-discharge flash tank automatically flows into the fixed-discharge cooling pool through the drainage pipeline and flows and is cooled from right to left in an S-shaped flowing manner.
During operation, firstly, water is injected into the self-priming tank: closing a water drain valve of a self-priming tank; opening an overflow valve of the self-priming tank; opening a water replenishing valve of the self-sucking tank, replenishing water to the self-sucking tank, and closing the overflow valve after the water flows to the overflow valve; and closing the water replenishing valve. Secondly, starting/stopping the automatic cooling water recovery system of the fixed-row cooling pool: the control mode of a control box of the liquid level automatic control system is switched to a liquid level mode, when the liquid level of the fixed-row cooling pool reaches the upper limit of the liquid level control switch, the centrifugal pump is automatically started, water enters the outer cavity of the self-priming tank through a suction pipeline at the inlet of the self-priming tank, enters the centrifugal pump through a connecting pipeline of the inlet of the centrifugal pump and the self-priming tank, and is delivered to a raw water pool of a plant area through an outlet pipeline of the centrifugal pump; when the liquid level of the fixed-row cooling pool is reduced to the lower limit of the liquid level control switch, the centrifugal pump automatically stops.
Further, in order to prevent water from overflowing to the reuse water device, the upper limit of a liquid level control switch of the magnetic turning plate liquid level meter is about 100mm lower than an overflow port of the fixed-discharge cooling pool; in order to prevent the pump from being damaged due to the fact that sundries in the fixed-row cooling pool enter the pump body, a filter screen is arranged on a suction pipeline at the inlet of the self-sucking tank; the lower limit of a liquid level control switch of the magnetic turning plate liquid level meter is 400mm higher than the bottom of the cooling pool in the fixed row.
Furthermore, the outlet of the automatic drainage recovery device of the constant-discharge cooling pool of the thermodynamic system is provided with a check valve, so that water in an outlet pipeline is prevented from flowing backwards and entering the constant-discharge cooling pool after the centrifugal pump is stopped.
Furthermore, the control system of the automatic drainage recovery device of the constant-drainage cooling pool of the thermodynamic system comprises two control modes of liquid level control and local manual control, and when the liquid level automatic control fails, the system can be ensured to continue to operate by adopting a manual start/stop mode.
Through the technical scheme, the utility model has the following beneficial effects:
after the self-priming tank is replenished with water for one time, as long as the outlet check valve, the self-priming tank water replenishing valve, the water drain valve and the overflow valve are not leaked, the vacuum of a self-priming system can be kept, and the water in the constant-discharge cooling pond can be pumped out. The liquid level control completely achieves the automatic control effect, the intervention of operators is not needed during the normal operation, and the workload of the operators is reduced.
Drawings
FIG. 1 is a schematic view of the structure of the present invention
FIG. 2 is a schematic view of the structure of the self-priming canister of the present invention
In the figure, 1-pump outlet pipeline, 2-centrifugal pump, 3-self-priming tank, 4-suction pipeline, 5-liquid level automatic control system, 6-local pressure gauge, 7-local thermometer, 8-pump outlet water discharge pipeline, 9-pump outlet valve, 10-pump outlet check valve, 11-drain valve, 12-pump inlet pipeline, 13-water supply pipeline, 14-water supply valve, 15-self-priming tank body, 16-overflow valve, 17-overflow pipeline, 18-drain valve, 19-drain pipeline, 20-overflow observation port, 21-magnetic turning plate liquid level meter, 22-control loop, 23-liquid level switch, 24-control box, 25-temperature reduction cooling water pipeline, 26-fixed discharge flash tank inlet mother pipe, 27-spraying desuperheater, 28-fixed row flash tank, 29-fixed row water drain pipeline, 31-cooling tank overflow port, 32-fixed row cooling tank, 33-inlet filter screen and 34-floating ball
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein throughout the description of the patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings, which is for convenience in describing the patent and for simplicity in description, rather than indicating or implying a device of interest or in the description of this patent, it is noted that the terms "mounted," "connected," and "disposed" are to be construed broadly unless otherwise specifically stated or limited, e.g., can be fixedly connected and arranged, can also be detachably connected and arranged, or can be integrally connected and arranged. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
As shown in fig. 1, the automatic recovery device for the drainage of the constant-displacement cooling pond of the thermodynamic system comprises a pump outlet pipeline 1, the pump outlet pipeline is made of a DN80 carbon steel pipeline and flange fittings, the pump outlet pipeline is connected with a centrifugal pump 2 in a flange mode, the pump outlet pipeline is sequentially arranged from the flange surface to the outside, a pump outlet check valve 10, a pump outlet valve 9, a pump outlet drainage pipeline 8, an on-site thermometer 7 and an on-site pressure gauge 6. After the centrifugal pump 2 is started, whether the pumping quantity is normal or not can be judged according to the indication of the pump outlet pressure gauge 6, whether the water temperature needs to be adjusted or not is judged according to the display of the local thermometer 7, and the size of the discharged water quantity can be controlled by adjusting the opening degree of the centrifugal pump outlet valve 9. The check valve 10 mainly prevents the water in the outlet pipeline 1 from flowing backwards after the centrifugal pump stops running, and the pump outlet water discharge pipeline 8 and the water discharge valve 11 are mainly used for preventing freezing in winter.
Particularly, the centrifugal pump 2 is a circulating water pump of a heat exchange station in an original factory area, the parameter pipe diameter DN80, the flow rate is 50t/h, the lift is 25m, a centrifugal hot water pump which is not used temporarily is reused, and the cost is saved. 2 imports of centrifugal pump are connected with self priming jar 3 with the flange form, and 2 exports of centrifugal pump are connected with outlet pipeline 1 with the flange form, and this connected mode is favorable to pump body to overhaul.
The utility model relates to an automatic drainage recovery device for a constant-drainage cooling pool of a thermodynamic system, which comprises an automatic liquid level control system 5, wherein the automatic liquid level control system 5 comprises an in-situ magnetic turning plate liquid level meter 21, a control box 24 and a liquid level control switch 23. Real-time liquid level scale indication is arranged on the magnetic turning plate liquid level meter 21, and a liquid level control switch 23 is arranged on the body of the magnetic turning plate liquid level meter 21. The liquid level high limit of 1.4m and the liquid level bottom limit of 0.4m are set according to the actual operation liquid level of the fixed-row cooling pool 32, namely under the control mode of 'liquid level automatic': when the liquid level of the fixed-row cooling pool 32 rises to 1.4m, the centrifugal pump is automatically started, and when the liquid level is reduced to 0.4m, the centrifugal pump automatically stops running, so that the aim of automatically controlling the liquid level is fulfilled.
As shown in fig. 2, the self-priming tank 3 of the automatic recovery device for drainage of the cooling pond of the thermodynamic system is schematically structured, and the self-priming tank 3 is installed on the upper surface of the cooling pond 32 of the thermodynamic system at an interval of 0.3 m; the self-sucking tank 3 comprises a tank body 15, a water replenishing pipeline 13 connected with the self-sucking tank 3 and a water replenishing valve 14 arranged on the water replenishing pipeline 13; the self-priming tank 3 comprises an overflow pipeline 17, a water discharge pipeline 19 and an overflow observation port 15; inlet suction line 4, screen 33. For example convenient maintenance, all be flange joint with 3 connecting line of self priming jar, need to self priming jar water injection before the commissioning: closing the water drain valve 18 of the self-priming tank 3; opening an overflow valve 16 of the self-priming tank 3; opening a water replenishing valve 14 of the self-sucking tank 3, replenishing water to the self-sucking tank 3, and closing an overflow valve 16 after water flows to the overflow valve 16; the refill valve 14 is closed. Self priming jar design principle is that the cavity moisturizing volume is greater than the suction tube volume can, can be earlier with self priming jar cavity liquid discharge after 2 starts of centrifugal pump, because 3 jar bodies of self priming jar are airtight container, form certain vacuum in the self priming jar, atmospheric pressure just will decide the water pressure of arranging in the cooling tank 32 and go into self priming jar 3 formation circulations this moment, the liquid level reaches the purpose that provides water to the continuous pump above centrifugal pump entry liquid level in keeping jar, guarantee that the pump can continuous operation, will decide the water automatic discharge in the row cooling tank.
The tank body 15 of the self-priming tank 3 is manufactured by sealing and welding two ends of a stainless steel pipeline with the length of 0.6m and the DN600, and the wall thickness is 8 mm; internal and external rust removal and corrosion prevention.
The utility model relates to a using method of an automatic drainage recycling device of a fixed-row cooling pool of a thermodynamic system, which comprises the following steps:
step one, injecting water into a self-priming tank: closing the water drain valve 18 of the self-priming tank 3; opening an overflow valve 16 of the self-priming tank 3; opening a water replenishing valve 14 of the self-sucking tank 3, replenishing water to the self-sucking tank 3, and closing an overflow valve 16 after water flows to the overflow valve 16; the refill valve 14 is closed. Secondly, starting/stopping the automatic cooling water recovery system of the fixed-row cooling pool: the control mode of a control box 24 of the liquid level automatic control system 5 is switched to a liquid level mode, when the liquid level of a fixed-row cooling pool 32 reaches the upper limit set by a liquid level control switch 23, a centrifugal pump 2 is automatically started, water enters an outer cavity of a self-priming tank 3 from an inlet of the self-priming tank 3 through a suction pipeline 4, enters the centrifugal pump 2 through an inlet of the centrifugal pump 2 and a connecting pipeline 12 of the self-priming tank 3, and is delivered to a plant raw water pool through an outlet pipeline 1 of the centrifugal pump 2; when the liquid level of the fixed-row cooling pool 32 is lowered to the lower limit set by the liquid level control switch 23, the centrifugal pump 2 is automatically stopped. When the device is in normal operation, an operator can judge whether the pumping amount is normal according to the indication of a pump outlet pressure gauge (6) after starting the centrifugal pump, whether the water temperature needs to be adjusted is judged according to the display of a local thermometer (7), the opening of an outlet valve 9 of the pump can be adjusted to control the amount of discharged water, a check valve 10 mainly prevents water in an outlet pipeline 1 from flowing backwards after the pump is stopped, and a drain valve 11 of the outlet pipeline 8 is mainly used for preventing freezing in winter; the automatic liquid level control system 5 is controlled by an upper limit liquid level control switch 23 and a lower limit liquid level control switch 23 of the magnetic turning plate liquid level meter 21.
The utility model operates 8000 hours annually, the quantity of recoverable water is 40 multiplied by 8000-320000 tons. The energy-saving and consumption-reducing effect is 40X 8000X 0.5 (160000 yuan) based on the treatment cost of the reuse water of 0.5 yuan/ton.
The utility model has simple structure, low construction cost, high working reliability and simple operation, can achieve automatic control and pipeline anti-freezing, can reduce the workload of operators, and realizes energy reduction, consumption reduction and system optimization in a real sense.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention may be made by those skilled in the art.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120631333.XU CN215372416U (en) | 2021-03-29 | 2021-03-29 | Automatic recovery unit of thermodynamic system row-fixing cooling pond drainage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120631333.XU CN215372416U (en) | 2021-03-29 | 2021-03-29 | Automatic recovery unit of thermodynamic system row-fixing cooling pond drainage |
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| CN215372416U true CN215372416U (en) | 2021-12-31 |
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| CN202120631333.XU Expired - Fee Related CN215372416U (en) | 2021-03-29 | 2021-03-29 | Automatic recovery unit of thermodynamic system row-fixing cooling pond drainage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117446880A (en) * | 2023-10-31 | 2024-01-26 | 山东专海信息科技有限公司 | A safety monitoring device for chemical wastewater cooling pools during water filling |
-
2021
- 2021-03-29 CN CN202120631333.XU patent/CN215372416U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117446880A (en) * | 2023-10-31 | 2024-01-26 | 山东专海信息科技有限公司 | A safety monitoring device for chemical wastewater cooling pools during water filling |
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Granted publication date: 20211231 |