CN112973270A - Coal-containing wastewater treatment process for thermal power plant - Google Patents
Coal-containing wastewater treatment process for thermal power plant Download PDFInfo
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- CN112973270A CN112973270A CN202110075342.XA CN202110075342A CN112973270A CN 112973270 A CN112973270 A CN 112973270A CN 202110075342 A CN202110075342 A CN 202110075342A CN 112973270 A CN112973270 A CN 112973270A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
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Abstract
The invention discloses a coal-containing wastewater treatment process of a thermal power plant, which is characterized in that a coal cinder collecting device is arranged in a trench for collecting coal-containing wastewater, the coal cinder collecting device comprises a filter cloth, a rotating device and the like, the filter cloth is arranged at the upper part of the inner side of the trench, and the filter cloth slides forwards along the water flow direction under the power provided by the rotating device. When the coal-containing wastewater is collected to a coal water sedimentation tank from a trench, the wastewater enters the trench through the filter cloth and flows to the original collection tank along the trench, the turbidity of the wastewater can be reduced to below 10NTU, and the wastewater can be directly treated by a filter device to reach the standard for recycling; 99% of cinder in the wastewater is collected on the filter cloth, the filter cloth moves forwards along with the rotating shaft, and the cinder is directly collected to a designated area. The invention not only provides a novel process for treating coal-containing wastewater, but also solves the problems that the coal slag at the bottom of the sedimentation tank needs to be cleaned regularly when the raw coal slag is collected to the coal water sedimentation tank, and the like, and can realize unattended operation and collect the coal slag without cleaning the water tank regularly.
Description
Technical Field
The invention relates to a coal-containing wastewater treatment process of a thermal power plant.
Background
The coal-containing wastewater is conventional wastewater of a thermal power plant, has high turbidity and deep color, and can be recycled after being treated according to an environmental protection policy. Coal-containing waste water is mostly coal yard ground and belt and washes and come the waste water, and cinder content is high in the waste water, and present conventional processing technology is tertiary deposit + filter, through natural sedimentation, and the cinder deposits at the sedimentation tank bottom, needs regular clearance, and the clearance expense is high, and wastes time and energy, influences production simultaneously.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a coal-containing wastewater treatment process of a thermal power plant. The problem of raw coal sediment collect to the coal water sedimentation tank, need regularly clear up sedimentation tank bottom coal sediment scheduling is solved, unmanned on duty can be realized, need not regularly to clear up the pond, can collect the coal sediment.
The technical scheme adopted by the invention for solving the problems is as follows: a coal-containing wastewater treatment process of a thermal power plant is characterized in that: arranging a coal cinder collecting device in a trench for collecting coal-containing wastewater, wherein the coal cinder collecting device comprises a filter cloth, a rotating device and the like, the filter cloth is arranged on the upper part of the inner side of the trench, the filter cloth is arranged into a concave structure, and the rotating device is arranged in the middle of the trench. Specifically, the filter cloth is arranged on the left side and the right side of the trench in a wall-hanging manner, and meanwhile, the filter cloth is further arranged on a rotating device and slides forwards under the power provided by the rotating device. More specifically, the filter cloth on the left and right sides of the trench is fixedly arranged and distributed above the rotating device. The filter cloth on the rotating device is arranged on the rotating shaft and can slide forwards along the water flow direction, and the installation height of the filter cloth on the rotating shaft can be 10-20cm away from the top end of the trench.
When the coal-containing wastewater is collected to a coal water sedimentation tank from a trench, the wastewater enters the trench through the filter cloth and flows to the original collection tank along the trench, the turbidity of the wastewater can be reduced to below 10NTU, and the wastewater can be directly treated by a filter device to reach the standard for recycling; 99% of cinder in the wastewater is collected on the filter cloth, the filter cloth moves forwards along with the rotating shaft, and the cinder is directly collected to a designated area.
The invention not only provides a novel process for treating coal-containing wastewater, but also solves the problems that the coal slag at the bottom of the sedimentation tank needs to be cleaned regularly when the raw coal slag is collected to the coal water sedimentation tank, and the like, and can realize unattended operation and collect the coal slag without cleaning the water tank regularly.
Furthermore, the coal slag collecting device is composed of filter cloth, a rotating device and the like, and is simple in structure and convenient to install.
Further, when the coal-containing wastewater flows through the coal cinder collecting device, the wastewater leaks to the bottom of the trench through the filter cloth and is collected to the original collecting tank along the trench, and the turbidity of the wastewater can be reduced to below 10 NTU; 99% of the coal slag is trapped on the filter cloth, and the filter cloth at the bottom of the device slides forwards to bring the coal slag to a designated area. The turbidity of the coal-containing wastewater treated by the method is reduced to below 10NTU, the original three-stage sedimentation tank process can be replaced, the filtering equipment is directly adopted, and the coal-containing wastewater can be treated to reach the standard.
The invention not only provides a coal-containing wastewater treatment process, but also provides a coal cinder collecting method. The new process can replace the original three-stage sedimentation tank process, and the floor area of coal-containing wastewater treatment equipment is reduced; the novel process realizes the separation of the coal-containing wastewater from the coal cinder before the coal-containing wastewater enters the collecting tank, and the operation of periodically cleaning the coal cinder and the like in the settling tank is not needed, so that the operation cost is saved.
The coal cinder collecting device has simple structure, can realize unattended operation, has less operation and maintenance amount, can be started when a coal yard is flushed, and solves the related problems caused by the prior regular water tank cleaning work.
Compared with the prior art, the invention has the following advantages and effects:
1. the invention utilizes the trench with longer line to treat the coal-containing wastewater, thus saving the occupied area.
2. Before coal-containing wastewater enters the sedimentation tank, the coal-containing wastewater is separated from coal slag, the collection of the coal slag is convenient, and the regular cleaning work of the coal slag at the bottom of the sedimentation tank is reduced or even eliminated.
3. The coal-containing wastewater treated by the method can be directly filtered subsequently, and the coal-containing wastewater can be treated to reach the standard and reused.
4. The invention has simple structure, convenient operation and low operation and maintenance cost.
Drawings
FIG. 1 is a schematic front view of a coal slag collecting device according to the present invention.
FIG. 2 is a schematic diagram of the right side view of the coal slag collecting device of the present invention.
FIG. 3 is a flow chart of a process for treating raw coal-containing wastewater.
FIG. 4 is a flow chart of the novel coal-containing wastewater treatment process of the present invention.
In the figure: the device comprises a trench 1, filter cloth 2, a rotating device 3, a rotating shaft 4, intercepted coal slag 5 and filtered wastewater 6.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Example 1.
Referring to fig. 1, 2 and 4, a coal-containing wastewater treatment process of a thermal power plant is characterized in that a coal cinder collecting device is arranged in a trench 1 for collecting coal-containing wastewater, the coal cinder collecting device comprises filter cloth 2, a rotating device 3 and the like, the filter cloth 2 is arranged on the upper portion of the inner side of the trench 1, the filter cloth 2 is arranged in a concave structure, and the rotating device 3 is arranged in the middle of the trench 1. Specifically, the filter cloth 2 is arranged on the left side and the right side of the trench 1 in a wall-hanging manner, and meanwhile, the filter cloth 2 is also arranged on the rotating device 3 and slides forwards under the power provided by the rotating device 3. More specifically, the filter cloth 2 on the left and right sides of the trench 1 is fixedly installed and distributed above the rotating device 3. The filter cloth 2 on the rotating device 3 is arranged on the rotating shaft 4 and can slide forwards along the water flow direction, and the installation height of the filter cloth 2 on the rotating shaft 4 can be 10-20cm away from the top end of the trench 1.
When the coal-containing wastewater is collected to a coal water sedimentation tank from a trench 1, the wastewater enters the trench 1 through a filter cloth 2 and flows to an original collection tank along the trench 1, the turbidity of the wastewater can be reduced to below 10NTU, and the wastewater can be treated by a filter device directly to reach the standard for recycling; 99% of cinder in the wastewater is collected on the filter cloth 2, the filter cloth 2 moves forwards along with the rotating shaft 4, and the cinder is directly collected to a designated area.
The process flow is as follows:
1. when the coal-containing waste water on the ground is required to be collected by washing the ground of a coal yard and a belt, the rotating device 3 is started to drive the filter cloth 2 to slide, the coal-containing waste water is treated, intercepted coal slag 5 is distributed on the filter cloth 2 on the rotating device 3, and the filtered waste water 6 is collected at the bottom of the trench 1.
2. The trolley is arranged at the front end of the filter cloth 2, coal cinder on the filter cloth 2 is directly poured into the trolley, and the trolley is directly pulled into a coal yard, so that the coal yard is convenient and rapid.
3. Filtered waste water 6 collected at the bottom of the trench 1 is collected to a collecting pool, the turbidity of the waste water is reduced to below 10NTU, and when the liquid level in the collecting pool is higher, a waste water lifting pump and a filter are started to treat the waste water in the collecting pool. When the waste water liquid level in the collecting tank is lower, the waste water lift pump and the filter are closed.
4. When the coal yard ground and the belt are washed, the rotating device 3 is stopped, and the energy consumption is saved.
Example 2.
In a certain thermal power plant in Fujian, the unit capacity is 2 660MW, which is influenced by environmental protection policy, and the coal-containing wastewater is recycled after being treated. The coal-containing wastewater treatment adopts a three-stage sedimentation tank process, the sedimentation tank is cleaned once in 1 month, and the three-stage sedimentation effect is poor, so that the quality of the outlet water of the filter is unqualified and the backwashing frequency is high.
After the invention is transformed at the end of 2018 years, the water quality of the filter outlet water is qualified, the backwashing frequency of the filter is changed from one backwashing for 1 day to one backwashing for one week, the cleaning of the sedimentation tank is reduced from one cleaning for 1 month to one cleaning for 1 year, and the cost is saved by about 20 ten thousand yuan.
Example 3.
In a certain thermal power plant in Shandong, the unit capacity is 2 units of 145MW and 2 units of 330MW, and according to a ring assessment report, the coal-containing wastewater needs to be treated and recycled. The coal-containing wastewater treatment adopts a three-stage sedimentation tank process, the sedimentation tank is cleaned once in 20 days, and the three-stage sedimentation effect is poor, so that the quality of the outlet water of the filter is unqualified and the backwashing frequency is high.
After the invention is modified in the early 2019, the water quality of the outlet water of the filter is qualified, the backwashing frequency of the filter is reduced, and the sedimentation tank is not cleaned once from modification to the present.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (2)
1. A coal-containing wastewater treatment process of a thermal power plant is characterized in that: arranging a coal slag collecting device in a trench (1) for collecting coal-containing wastewater, wherein the coal slag collecting device comprises a filter cloth (2) and a rotating device (3), the filter cloth (2) is arranged at the upper part of the inner side of the trench (1), the filter cloth (2) is arranged into a concave structure, and the rotating device (3) is arranged in the middle of the trench (1); the filter cloth (2) is arranged on the left side and the right side of the trench (1) in a wall-hanging manner, and meanwhile, the filter cloth (2) is also arranged on the rotating device (3) and is powered by the rotating device (3) to slide forwards; the filter cloth (2) at the left side and the right side of the trench (1) are fixedly arranged and distributed above the rotating device (3); the filter cloth (2) on the rotating device (3) is arranged on the rotating shaft (4) and slides forwards along the water flow direction, and the installation height of the filter cloth (2) on the rotating shaft (4) is 10-20cm away from the top end of the trench (1);
when the coal-containing wastewater is collected to a coal water sedimentation tank from a trench (1), the wastewater leaks to the bottom of the trench (1) through a filter cloth (2) and flows to a collection tank along the trench (1), the turbidity of the wastewater is reduced to below 10NTU, and the wastewater is directly treated by a filter device to reach the standard for recycling; 99% of cinder in the wastewater is collected on the filter cloth (2), the filter cloth (2) moves forwards along with the rotating shaft (4), and the cinder is directly collected to a designated area.
2. The coal-containing wastewater treatment process of a thermal power plant according to claim 1, characterized in that: the process flow is as follows:
1) when the coal-containing waste water on the ground is required to be collected by washing the ground of a coal yard and a belt, starting a rotating device (3) to drive a filter cloth (2) to slide so as to treat the coal-containing waste water, wherein intercepted coal slag (5) is distributed on the filter cloth (2) on the rotating device (3), and the filtered waste water (6) is collected at the bottom of a trench (1);
2) a trolley is arranged at the front end of the filter cloth (2), coal slag on the filter cloth (2) is directly poured into the trolley, and the trolley is directly pulled into a coal yard;
3) filtered wastewater (6) collected at the bottom of the trench (1) is collected into a collection pool, and when the liquid level in the collection pool is higher, a wastewater lifting pump and a filter are started to treat the wastewater in the collection pool; when the liquid level of the wastewater in the collecting tank is lower, the wastewater lifting pump and the filter are closed;
4) and when the coal yard ground and the belt are washed, stopping rotating the device (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110075342.XA CN112973270A (en) | 2021-01-20 | 2021-01-20 | Coal-containing wastewater treatment process for thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110075342.XA CN112973270A (en) | 2021-01-20 | 2021-01-20 | Coal-containing wastewater treatment process for thermal power plant |
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| CN112973270A true CN112973270A (en) | 2021-06-18 |
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| CN202110075342.XA Pending CN112973270A (en) | 2021-01-20 | 2021-01-20 | Coal-containing wastewater treatment process for thermal power plant |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366850A (en) * | 2015-12-08 | 2016-03-02 | 国投钦州发电有限公司 | Electronic coagulation process and facility for coal-bearing wastewater |
| CN107050970A (en) * | 2017-06-17 | 2017-08-18 | 山东中科贝特环保装备股份有限公司 | Rubber belt type vacuum filter |
| CN108220590A (en) * | 2017-12-19 | 2018-06-29 | 王森杰 | A kind of quick wash device for rare-earth oxalate |
| CN108726703A (en) * | 2018-04-27 | 2018-11-02 | 陈阳波 | A kind of coal-contained wastewater treatment process and equipment |
| CN110180256A (en) * | 2019-05-10 | 2019-08-30 | 华电电力科学研究院有限公司 | A kind of coal water sedimentation pond of automatic collection coal slime and its working method |
-
2021
- 2021-01-20 CN CN202110075342.XA patent/CN112973270A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366850A (en) * | 2015-12-08 | 2016-03-02 | 国投钦州发电有限公司 | Electronic coagulation process and facility for coal-bearing wastewater |
| CN107050970A (en) * | 2017-06-17 | 2017-08-18 | 山东中科贝特环保装备股份有限公司 | Rubber belt type vacuum filter |
| CN108220590A (en) * | 2017-12-19 | 2018-06-29 | 王森杰 | A kind of quick wash device for rare-earth oxalate |
| CN108726703A (en) * | 2018-04-27 | 2018-11-02 | 陈阳波 | A kind of coal-contained wastewater treatment process and equipment |
| CN110180256A (en) * | 2019-05-10 | 2019-08-30 | 华电电力科学研究院有限公司 | A kind of coal water sedimentation pond of automatic collection coal slime and its working method |
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Application publication date: 20210618 |