Cold closed type circulating water on-line filtering device

Abstract

The utility model relates to the field of indirect air cooling, and discloses a cold closed type circulating water on-line filtering device which comprises a surface type condenser and a condensate pump, the condensate pump is arranged at the output end of the surface type condenser, and the surface type condenser leads one path of circulating water to a circulating water pump through the condensate pump. The output end of the circulating water pump is connected to the underground water tank, and a circulating cold water heat pipe is installed between the circulating water pump and the underground water tank. According to the cold closed type circulating water on-line filtering device, by arranging the condensate assembly composed of the iron removal filter, the activated carbon filter and the mixed ion exchanger, an existing indirect cooling circulating water system is transformed into a cold closed type circulating water on-line filtering system, multi-stage purification of indirect cooling circulating water is achieved, impurities in water can be effectively removed, and the water quality is improved. Corrosion and scaling of equipment are reduced, the operation efficiency is improved, the service life of the equipment is prolonged, and the problem that the water quality is affected due to high pH value of indirect air-cooled circulating water is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of indirect air cooling, in particular to a cold closed circulating water online filtering device. Background Art

[0002] Indirect air cooling technology is widely used in northern China as an important water-saving design for thermal power plants. Indirect air cooling uses circulating cooling water with a lower temperature as an intermediate medium to complete the heat exchange between the exhaust steam of the steam turbine and the air, and the circulating water uses demineralized water. During the capital construction and commissioning of the units, domestic indirect air-cooled units have all experienced abnormal increases in pH values ​​to varying degrees, with some even reaching as high as 8.8 to 9.5. If the pH value of the circulating water cannot be controlled in a timely manner, not only will a large amount of demineralized water be wasted, but it will also cause corrosion and leakage of the cooling triangle tube bundle of the intercooler tower, causing the unit to be shut down for a long time. The main adjustment and treatment methods for the water quality control of the intercooler circulating water are currently demineralized water replacement method, acid neutralization method, and side stream treatment method. The desalted water replacement method is used because the indirect cooling circulating water system has long pipelines, large pipe diameters, and large water storage capacity. It can only reduce the pH value by changing the water, which is not economical and time-effective. The acid neutralization method mainly uses weak acids such as ascorbic acid and carbonic acid to reduce the pH value, but it cannot remove aluminum ions in the system, and it only treats the symptoms and not the root cause. Compared with the first two, the side-stream treatment method uses filtration + desalination of circulating water side-stream treatment rules, which is more effective.

[0003] Moreover, investigations have shown that after the unit was transferred from infrastructure construction to formal production operation, historical problems such as excessive levels of silicon, iron, aluminum, conductivity, and pH value in the intercooling circulating water still exist, posing a huge safety hazard to the unit's operation.

[0004] Therefore, how to design a cold closed circulating water online filtration device to solve the above technical defects has become a key issue that needs to be studied at present. Utility Model Content

[0005] The purpose of the utility model is to provide a cold closed circulating water online filtering device to solve the problem of high pH value of indirect air-cooled circulating water affecting water quality proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cold closed circulating water online filtration device, comprising a surface condenser and a condensate pump, wherein the output end of the surface condenser is provided with a condensate pump, the surface condenser leads a path of circulating water to the circulating water pump through the condensate pump, the output end of the circulating water pump is connected to an underground water tank, a circulating cold water heat pipe is installed between the circulating water pump and the underground water tank, and a condensate assembly is provided between the inlet section and the outlet section of the circulating cold water heat pipe; the condensate assembly comprises an iron removal filter, an activated carbon filter and a mixed ion exchanger.

[0007] Preferably, a circulating cooling return water cooling pipe is connected between the surface condenser and the air cooling tower.

[0008] Preferably, a high-level water tank for storing cooling water is installed at the air cooling tower.

[0009] Preferably, an underground circulating water pipeline is provided at the input end of the underground water tank.

[0010] Preferably, the activated carbon filter is arranged behind the iron removal filter, and the mixed ion exchanger is arranged behind the activated carbon filter.

[0011] Preferably, the iron removal filter includes a filter screen and filter material for filtering iron impurities in water, the activated carbon filter is filled with activated carbon particles for adsorbing organic matter and odor in water, and the mixed ion exchanger includes a mixed ion exchange resin for removing ionic impurities in water.

[0012] Preferably, each pipeline between the surface condenser and the condensate assembly is provided with a corresponding control valve on the pipeline, and each pipeline adopts Φ219×6mm-CP.

[0013] Preferably, the underground water tank is provided with corresponding ventilation pipes and ladders, and the volume of the underground water tank is ≥200m 3 .

[0014] Compared with the existing technology, the beneficial effects of the utility model are: the cold closed circulating water online filtration device not only effectively removes impurities in the water, reduces corrosion and scaling of equipment, realizes real-time monitoring and adjustment of water quality, reduces manual operation and maintenance costs, but also realizes the connection between the indirect cooling circulating water and the condensate treatment system, and the system automatically operates periodically;

[0015] (1) By providing a condensate assembly consisting of an iron removal filter, an activated carbon filter, and a mixed ion exchanger, the existing indirect cooling circulating water system is transformed into a cold closed circulating water online filtration system to achieve multi-stage purification of the indirect cooling circulating water. The specific operation steps are as follows: the indirect cooling circulating water cooling water (hot water) is led to the condensate treatment system, and after being treated with iron removal, silicon removal, pH adjustment, etc., it is returned to the indirect cooling circulating water cooling water return (cold water) pipe. This can not only effectively remove impurities in the water and improve the purity of the water quality, but also ensure the stability of the water quality during the operation of the system, reduce the corrosion and scaling of the equipment, and improve the operating efficiency and equipment life;

[0016] (2) By setting the circulating water pump, circulating cooling backwater cold pipe, buried circulating water pipeline, 8, underground water tank, circulating cold water heat pipe, by installing chemical detection instrument in the system, the corresponding control valve is arranged on the pipeline of each pipeline, the water quality is monitored and adjusted in real time, the water quality parameter is measured in real time, the measured value is compared with the standard value, when the water quality deviates from the standard, the system automatically adjusts the water treatment amount, realizes the optimization of water quality, this design can ensure that the water quality is always in the best state, solves the problems of insufficient real-time monitoring and untimely adjustment in the traditional water quality treatment method, improves the automation degree and operation reliability of the system, reduces the manual operation and maintenance cost;

[0017] (3) By setting the circulating cooling backwater cold pipe, circulating cold water heat pipe, through system transformation, the double functions of condensate treatment and intercooling circulating water purification are realized, two pipelines are added in the existing condensate treatment system, the intercooling circulating water and the condensate treatment system are connected, the disturbance-free switching of the two is realized, in actual operation, the system can automatically perform periodic operation, complete water quality purification and treatment, avoid the complexity and potential operation errors of manual operation, this design greatly improves the operation efficiency and safety of the system, effectively avoids the equipment damage and shutdown risk caused by water quality problems, improves the economic benefit and environmental protection benefit. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a system flow schematic diagram of the utility model;

[0019] Figure 2 It is a buried circulating water pipeline connection schematic diagram of the utility model;

[0020] Figure 3 It is a condensate assembly position distribution schematic diagram of the utility model;

[0021] Figure 4 It is a circulating cooling backwater cold pipe connection schematic diagram of the utility model.

[0022] In the drawing: 1, surface type condenser; 2, condensate pump; 3, circulating water pump; 4, circulating cooling backwater cold pipe; 5, air cooling tower; 6, high-level water tank; 7, buried circulating water pipeline; 8, underground water tank; 9, iron removal filter; 10, activated carbon filter; 11, mixed ion exchanger; 12, circulating cold water heat pipe. DETAILED DESCRIPTION

[0023] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments only are a part of embodiments of the utility model, and not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0024] Embodiment 1: please refer to Figures 1-4 A cold closed circulating water online filtering device, including surface condenser 1 and condensate pump 2, the output end of surface condenser 1 is provided with condensate pump 2, surface condenser 1 is introduced to circulating water pump 3 through condensate pump 2, the output end of circulating water pump 3 is connected to underground water tank 8, circulating cold water heat pipe 12 is installed between circulating water pump 3 and underground water tank 8, and condensate assembly is arranged between the inlet pipe section and outlet pipe section of circulating cold water heat pipe 12;Condensate assembly includes iron filter 9, activated carbon filter 10 and mixed ion exchanger 11, surface condenser 1 is connected with circulating cooling return water cold pipe 4 between air cooling tower 5, and the input end of underground water tank 8 is provided with buried circulating water pipeline 7.

[0025] Specifically, as shown in Figure 1 , Figure 2 , Figure 3 And Figure 4 , the existing intercooling circulating water system is transformed into a cold closed circulating water online filtering system by setting condensate assembly composed of iron filter 9, activated carbon filter 10 and mixed ion exchanger 11, and multi-stage purification of intercooling circulating water is realized, and the specific operation steps are as follows: intercooling circulating water cooling water heat water is introduced to condensate treatment system, after iron removal, silicon removal, pH adjustment and other treatments, and then backflow to intercooling circulating water cooling water return water cold water pipe.

[0026] Embodiment 2: each pipeline between surface condenser 1 and condensate assembly is provided with corresponding control valve on pipeline, each pipeline adopts Φ219x6mm-CP, corresponding air pipe and ladder are arranged at underground water tank 8, and the volume of underground water tank 8 is ≥200m 3 ;

[0027] Specifically, as shown in Figure 1 , Figure 2 , Figure 3 And Figure 4 , by installing chemical detection instrument in the system, each pipeline is provided with corresponding control valve on pipeline, water quality is monitored and adjusted in real time, water quality parameters are measured in real time, the measured value is compared with the standard value, when the water quality deviates from the standard, the system automatically adjusts the water quantity, realizes the optimization of water quality, and can ensure that the water quality is always in the best state.

[0028] Example 3: A high-level water tank 6 for storing cooling water is installed at the air-cooling tower 5, an activated carbon filter 10 is arranged behind the iron removal filter 9, and a mixed ion exchanger 11 is arranged behind the activated carbon filter 10. The iron removal filter 9 includes a filter screen and filter material for filtering iron impurities in the water. The activated carbon filter 10 is filled with activated carbon particles for adsorbing organic matter and odor in the water. The mixed ion exchanger 11 includes a mixed ion exchange resin for removing ionic impurities in the water;

[0029] Specifically, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 Figure 1 Figure 2 Figure 3 Figure 4 As shown in the figure, through system transformation, the dual functions of condensate treatment and indirect cooling circulating water purification are realized. Two pipelines are added to the existing condensate treatment system to connect the indirect cooling circulating water and the condensate treatment system to achieve non-disruptive switching between the two. In actual operation, the system can automatically operate periodically to complete water purification and treatment.

[0030] Working principle: The hot water of the indirect cooling circulating water is led to the condensate treatment system. After being treated with iron removal, silicon removal, pH adjustment, etc., it is returned to the indirect cooling circulating water cooling water return cold water pipe. By setting a condensate component composed of an iron removal filter 9, an activated carbon filter 10, and a mixed ion exchanger 11, the existing indirect cooling circulating water system is transformed into a cold closed circulating water online filtration system to achieve multi-stage purification of the indirect cooling circulating water. By installing chemical detection instruments in the system and setting corresponding control valves on each pipeline, the water quality is monitored and adjusted in real time, the water quality parameters are measured in real time, and the measured values ​​are compared with the standard values. When the water quality deviates from the standard, the system automatically adjusts the treated water volume to achieve water quality optimization. Through system transformation, the dual functions of condensate treatment and indirect cooling circulating water purification are realized. Two pipelines are added to the existing condensate treatment system to connect the indirect cooling circulating water and the condensate treatment system to achieve non-disruptive switching between the two. In actual operation, the system can automatically operate periodically to complete water purification and treatment.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A cold closed circulating water online filtration device, comprising a surface condenser (1) and a condensate pump (2), characterized in that: The output end of the surface condenser (1) is provided with a condensate pump (2), and the surface condenser (1) leads a path of circulating water to a circulating water pump (3) through the condensate pump (2). The output end of the circulating water pump (3) is connected to an underground water tank (8), and a circulating cold water heat pipe (12) is installed between the circulating water pump (3) and the underground water tank (8). A condensate assembly is provided between the inlet pipe section and the outlet pipe section of the circulating cold water heat pipe (12); The condensate assembly comprises an iron removal filter (9), an activated carbon filter (10) and a mixed ion exchanger (11).

2. The cold closed circulating water online filtration device according to claim 1, characterized in that: A circulating cooling return water cooling pipe (4) is connected between the surface condenser (1) and the air cooling tower (5).

3. The cold closed circulating water online filtration device according to claim 1, characterized in that: The input end of the underground water tank (8) is provided with a buried circulating water pipeline (7).

4. The cold closed circulating water online filtration device according to claim 1, characterized in that: The activated carbon filter (10) is arranged behind the iron removal filter (9), and the mixed ion exchanger (11) is arranged behind the activated carbon filter (10).

5. The cold closed circulating water online filtration device according to claim 1, characterized in that: The iron removal filter (9) comprises a filter screen and filter material for filtering iron impurities in water; the activated carbon filter (10) is filled with activated carbon particles for adsorbing organic matter and odor in water; and the mixed ion exchanger (11) comprises a mixed ion exchange resin for removing ionic impurities in water.

6. The cold closed circulating water online filtration device according to claim 1, characterized in that: Each pipeline between the surface condenser (1) and the condensate assembly is provided with a corresponding control valve on the pipeline, and each pipeline adopts Φ219×6mm-CP.

7. The cold closed circulating water online filtration device according to claim 1, characterized in that: The underground water tank (8) is provided with corresponding ventilation pipes and ladders, and the volume of the underground water tank (8) is ≥200m 3 .

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