Circulating cooling water bypass flow treatment system

Abstract

The utility model discloses a circulating cooling water bypass flow treatment system which comprises a hardness removal device, a hardness removal water production tank, a silicon removal device, a silicon removal water production tank, a filtering device and a backflow pipeline, the hardness removal device is connected with the circulating cooling tower unit and receives cooling water from the circulating cooling tower unit; the hardness removing device, the hardness removing water producing pool, the silicon removing device, the silicon removing water producing pool and the filtering device are sequentially connected according to the cooling water treatment flow direction, and the backflow pipeline is connected between the filtering device and the circulating cooling tower unit. According to the circulating cooling water bypass flow treatment system disclosed by the utility model, the circulating cooling water is subjected to bypass flow treatment through the hardness removal device, the hardness removal water production tank, the silicon removal device, the silicon removal water production tank and the filtering device, and calcium, magnesium, silicon, part of COD (Chemical Oxygen Demand) and phosphate in the circulating cooling water are subjected to bypass removal, so that the purposes of increasing the concentration ratio of the circulating cooling water and improving the quality of the circulating cooling water are achieved. And the concentration of scaling factors such as calcium, magnesium and silicon in the circulating cooling tower is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling water treatment, in particular to a circulating cooling water bypass treatment system. Background Art

[0002] For power plant circulating cooling water, environmental protection requirements are becoming increasingly stringent, with lower water intake quotas, less external discharge, and higher wastewater quality standards. For power plant circulating cooling water without a desulfurization system and a secondary reuse point for fully absorbing circulating cooling wastewater, it is particularly important to bypass the circulating cooling water.

[0003] By treating the circulating water side stream, it is expected to achieve the goals of reducing key pollutants in the circulating water, increasing the concentration rate of the circulating water, reducing the amount of circulating water wastewater discharged, and reducing the sewage discharge fee and comprehensive cost. Therefore, it is necessary to design a side stream treatment system to achieve the above goals. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a circulating cooling water bypass treatment system.

[0005] The utility model solves the technical problem by adopting a technical solution: providing a circulating cooling water bypass treatment system, including a hardness removal device for removing hardness from cooling water, a hardness removal water production pool, a silicon removal device for removing silicon from cooling water, a silicon removal water production pool, a filtering device and a return pipe;

[0006] The hardness removal device is connected to the circulating cooling tower unit to receive cooling water from the circulating cooling tower unit; the hardness removal device, hardness removal water production pool, silicon removal device, silicon removal water production pool and filtering device are connected in sequence according to the cooling water treatment flow direction, and the return pipe is connected between the filtering device and the circulating cooling tower unit.

[0007] In some embodiments, the hardness removal device comprises a hardness removal reaction tank, a hardness removal flocculation tank and a hardness removal sedimentation tank which are sequentially connected to each other;

[0008] The hardness removal reaction pool comprises a first hardness removal pool for adding a hardness removal agent therein and a second hardness removal pool for adding a flocculant therein; the first hardness removal pool and the second hardness removal pool are connected.

[0009] In some embodiments, the desiliconization device comprises a desiliconization reaction tank, a desiliconization flocculation tank and a desiliconization sedimentation tank which are sequentially connected to each other;

[0010] The desiliconization reaction pool comprises a first desiliconization pool for adding a desiliconizer and a second desiliconization pool for adding a flocculant; the first desiliconization pool and the second desiliconization pool are connected.

[0011] In some embodiments, the filtration device comprises a sand filter.

[0012] In some embodiments, the hardness removal device and the silicon removal device are respectively integrated devices.

[0013] In some embodiments, the circulating cooling water bypass treatment system further includes a first pipeline connected between the circulating cooling tower unit and the hardness removal device, and a first water pump disposed on the first pipeline.

[0014] In some embodiments, the circulating cooling water bypass treatment system further includes a second pipeline connected between the hardness removal water production pool and the silicon removal device, and a second water pump disposed on the second pipeline.

[0015] In some embodiments, the circulating cooling water bypass treatment system further includes a third pipeline connected between the desiliconization water production pool and the filtering device, and a third water pump disposed on the third pipeline.

[0016] In some embodiments, the circulating cooling water bypass treatment system also includes mud discharge pipes respectively connected to the hardness removal device and the silicon removal device.

[0017] In some embodiments, the circulating cooling tower unit includes a circulating cooling tower and a cooling tower forebay connected to each other; the circulating cooling tower is connected to the hardness removal device, and the return pipe is connected between the filtering device and the cooling tower forebay.

[0018] The circulating cooling water bypass treatment system of the utility model performs bypass treatment on the circulating cooling water through a hardness removal device, a hardness removal water production pool, a silicon removal device, a silicon removal water production pool and a filtering device, and removes calcium, magnesium, silicon, part of COD and phosphate in the circulating cooling water through bypass, so as to achieve the purpose of improving the concentration rate of the circulating cooling water and reducing the concentration of scaling factors such as calcium, magnesium and silicon in the circulating cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 It is a structural schematic diagram of a circulating cooling water bypass flow treatment system according to an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0022] like Figure 1As shown, a circulating cooling water bypass treatment system according to an embodiment of the utility model comprises a hardness removal device 10, a hardness removal water production pool 20, a silicon removal device 30, a silicon removal water production pool 40, a filtering device 50 and a return pipe 60 which are connected in sequence.

[0023] The hardness removal device 10 is connected to the circulating cooling tower unit and receives cooling water from the circulating cooling tower unit. The cooling water passes through the hardness removal device 10, the hardness removal water production pool 20, the silicon removal device 30, the silicon removal water production pool 40 and the filtering device 50 in sequence, and calcium, magnesium, silicon, part of COD and phosphate are removed therein, and finally flows back to the circulating cooling tower unit through the reflux pipe 60.

[0024] The circulating cooling tower unit may further include a circulating cooling tower 100 and a cooling tower forebay 110 ; the cooling tower forebay 110 is connected to the circulating cooling tower 100 via a circulating pipeline to form a circulating loop with the circulating cooling tower 100 .

[0025] Specifically, the hardness removal device 10 serves as a processing front end of the circulating cooling water bypass treatment system, is connected to the circulating cooling tower 100, receives cooling water from the circulating cooling tower 100, and performs hardness removal treatment on the cooling water.

[0026] In some embodiments, the circulating cooling water bypass treatment system further includes a first pipeline 61 and a first water pump 62. The first pipeline 61 is connected between the circulating cooling tower 100 and the hardness removal device 10, and the first water pump 62 is disposed on the first pipeline 61 to provide power to pump the circulating water into the hardness removal device 10.

[0027] Preferably, the hardness removal device 10 is an integrated device.

[0028] Furthermore, the hardness removal device 10 may include a hardness removal reaction tank 11, a hardness removal flocculation tank 12 and a hardness removal sedimentation tank 13 which are connected in sequence. The hardness removal reaction tank 11, the hardness removal flocculation tank 12 and the hardness removal sedimentation tank 13 may be separated and formed in an integral tank body, and the three are arranged according to the water flow direction.

[0029] The de-hardening reaction tank 11 may further include a first de-hardening tank 111 and a second de-hardening tank 112 connected to each other, wherein a stirrer is provided in each of the first de-hardening tank 111 and the second de-hardening tank 112. The first de-hardening tank 111 is used for putting a de-hardening agent into the first de-hardening tank 111, and the de-hardening agent is mixed with cooling water in the first de-hardening tank 111 to remove calcium and magnesium ions in the water. The second de-hardening tank 112 can be separated and connected to the first de-hardening tank 111 by at least two vertically staggered partitions 14, and the first de-hardening tank 111 can pass through the bottom of a first partition 14 along the first partition 14, and then flow upward along another first partition 14 into the second de-hardening tank 112. The second de-hardening tank 112 is used for putting a flocculant into the second de-hardening tank 112, and the flocculant is mixed with cooling water in the second de-hardening tank 112 to remove heavy metals, phosphates and COD in the water. The cooling water in the second hardness removal tank 112 then enters the hardness removal flocculation tank 12, and a coagulant is added to the hardness removal flocculation tank 12 to accelerate the formation of alum flocs. The hardness removal flocculation tank 12 is equipped with a stirrer for stirring. The flocculated water enters the hardness removal sedimentation tank 13 for solid-liquid separation, and the supernatant overflows into the hardness removal water production tank 20.

[0030] The hardness removal water production tank 20 is connected between the hardness removal device 10 and the silicon removal device 30 to store and clarify the cooling water after hardness removal. The cooling water overflowing from the hardness removal flocculation tank 12 to the hardness removal water production tank 20 can be stored and allowed to stand in the hardness removal water production tank 20, and the clarified liquid after standing is then sent to the silicon removal device 30.

[0031] The desiliconization device 30 is connected to the desiliconization water production tank 20, and receives the desiliconized cooling water from the desiliconization water production tank 20. The desiliconization device 30 is preferably an integrated device. The desiliconization device 30 includes a desiliconization reaction tank 31, a desiliconization flocculation tank 32, and a desiliconization sedimentation tank 33, which are sequentially connected and communicated with each other; the desiliconization reaction tank 31, the desiliconization flocculation tank 32, and the desiliconization sedimentation tank 33 can be separated and formed in an integral tank body, and the three are arranged according to the water flow direction.

[0032] The desiliconization reaction tank 31 may further include a first desiliconization tank 311 for adding a desiliconization agent and a second desiliconization tank 312 for adding a flocculant; the first desiliconization tank 311 and the second desiliconization tank 312 may be separated and connected by at least two second partitions 34 staggered up and down. Agitators are respectively provided in the first desiliconization tank 311 and the second desiliconization tank 312. In the first desiliconization tank 311, the desiliconization agent is mixed with cooling water to remove silicon in the water, and then can pass through the bottom of a second partition 34 along the second partition 34, and then flow upward along another second partition 34 into the second desiliconization tank 312. In the second desiliconization tank 312, the added flocculant is mixed with cooling water to further remove heavy metals, phosphates and COD in the water, and the cooling water then enters the desiliconization flocculation tank 32. A coagulant is added to the desiliconization flocculation tank 32 to accelerate the formation of alum flocs. The desiliconization flocculation tank 32 is provided with a stirrer for stirring. The cooling water after flocculation enters the desiliconization sedimentation tank 33 for solid-liquid separation, and the supernatant overflows into the desiliconization water production tank 40.

[0033] In order to transport the cooling water in the hardness removal water production pool 20 to the silicon removal device 30, in some embodiments, the circulating cooling water bypass treatment system further includes a second pipeline 71 connected between the hardness removal water production pool 20 and the silicon removal device 30, and a second water pump 72 disposed on the second pipeline 71. The second pipeline 71 is specifically connected between the hardness removal water production pool 20 and the first silicon removal pool 311 of the silicon removal reaction pool 31.

[0034] The desiliconization water production tank 40 stores and clarifies the cooling water after desiliconization. The cooling water overflowing from the desiliconization flocculation tank 32 to the desiliconization water production tank 40 can be stored and allowed to stand in the desiliconization water production tank 40, and the clarified liquid after standing is then sent to the filtering device 50.

[0035] In order to transport the cooling water in the desiliconization water production pool 40 to the filter device 50, in some embodiments, the circulating cooling water bypass treatment system further includes a third pipeline 81 and a third water pump 82. The third pipeline 81 is connected between the desiliconization water production pool 40 and the filter device 50, and the third water pump 82 is arranged on the third pipeline 81 to provide power to pump the cooling water in the desiliconization water production pool 40 into the filter device 50.

[0036] The filtering device 50 may include a sand filter to filter out tiny particles in the cooling water.

[0037] The reflux pipe 60 is connected between the filter device 50 and the cooling tower forebay 110 , and delivers the filtered cooling water to the cooling tower forebay 110 .

[0038] In addition, the sludge formed after being processed by the hardness removal device 10 and the silicon removal device 30 can be discharged out of the system through the sludge discharge pipe 90 and enter the sludge treatment system for unified treatment.

[0039] In summary, the utility model removes calcium, magnesium, silicon, total phosphorus and part of COD in the circulating water in the circulating cooling tower 100 through the cooperation of various devices, and the purified water is recycled to the circulating cooling tower 100, thereby achieving the effect of reducing emissions from the circulating cooling water system and improving the concentration rate of the circulating water.

[0040] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A circulating cooling water bypass treatment system, characterized in that: It includes a hardness removal device for removing hardness from cooling water, a hardness removal water production pool, a silicon removal device for removing silicon from cooling water, a silicon removal water production pool, a filtering device and a return pipe; The hardness removal device is connected to the circulating cooling tower unit to receive cooling water from the circulating cooling tower unit; the hardness removal device, hardness removal water production pool, silicon removal device, silicon removal water production pool and filtering device are connected in sequence according to the cooling water treatment flow direction, and the return pipe is connected between the filtering device and the circulating cooling tower unit.

2. The circulating cooling water bypass treatment system according to claim 1, characterized in that: The hardness removal device comprises a hardness removal reaction tank, a hardness removal flocculation tank and a hardness removal sedimentation tank which are sequentially connected to each other; The hardness removal reaction pool comprises a first hardness removal pool for adding a hardness removal agent therein and a second hardness removal pool for adding a flocculant therein; the first hardness removal pool and the second hardness removal pool are connected.

3. The circulating cooling water bypass treatment system according to claim 1, characterized in that: The desiliconization device comprises a desiliconization reaction tank, a desiliconization flocculation tank and a desiliconization sedimentation tank which are connected to each other in sequence; The desiliconization reaction pool comprises a first desiliconization pool for adding a desiliconizer and a second desiliconization pool for adding a flocculant; the first desiliconization pool and the second desiliconization pool are connected.

4. The circulating cooling water bypass treatment system according to claim 1, characterized in that: The filtering device comprises a sand filter.

5. The circulating cooling water bypass treatment system according to claim 1, characterized in that: The hardness removal device and the silicon removal device are respectively integrated equipment.

6. The circulating cooling water bypass treatment system according to any one of claims 1 to 5, characterized in that: The circulating cooling water bypass treatment system also includes a first pipeline connected between the circulating cooling tower unit and the hardness removal device, and a first water pump arranged on the first pipeline.

7. The circulating cooling water bypass treatment system according to any one of claims 1 to 5, characterized in that: The circulating cooling water bypass treatment system also includes a second pipeline connected between the hardness removal water production pool and the silicon removal device, and a second water pump arranged on the second pipeline.

8. The circulating cooling water bypass treatment system according to any one of claims 1 to 5, characterized in that: The circulating cooling water bypass treatment system also includes a third pipeline connected between the desiliconization water production pool and the filtering device, and a third water pump arranged on the third pipeline.

9. The circulating cooling water bypass treatment system according to any one of claims 1 to 5, characterized in that: The circulating cooling water bypass treatment system also includes mud discharge pipelines respectively connected to the hardness removal device and the silicon removal device.

10. The circulating cooling water bypass treatment system according to any one of claims 1 to 5, characterized in that: The circulating cooling tower unit comprises a circulating cooling tower and a cooling tower forebay connected to each other; the circulating cooling tower is connected to the hardness removal device, and the return pipe is connected between the filtering device and the cooling tower forebay.

Images