CN210764515U

CN210764515U - Desulfurization and denitrification PTU system clarification tank

Info

Publication number: CN210764515U
Application number: CN201921509324.2U
Authority: CN
Inventors: 吴征; 邵斌; 曹俊; 曹翔
Original assignee: Jiangsu Saiou Environmental Protection Equipment Co ltd
Current assignee: Jiangsu Saiou Environmental Protection Equipment Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-06-16
Anticipated expiration: 2029-09-11

Abstract

The utility model discloses a desulfurization and denitrification PTU system clarification tank, which relates to the technical field of clarification tanks and comprises a tank body, wherein a plurality of flow guide walls vertical to the bottom of the tank body are arranged in the tank body to divide the inner cavity of the tank body into a reaction area, a buffer area and a settling area in sequence; a variable frequency speed control agitator is installed to the bottom in reaction zone, the well upper portion in reaction zone is fixed with the agitator that congeals, the agitator that congeals is open-top's hollow structure, the inner chamber of the agitator that congeals is the narrow venturi shape structure in the wide centre in both ends, No. two variable frequency speed control agitators are installed to the inner chamber of the agitator that congeals, the impeller of No. two variable frequency speed control agitators is located the inner chamber bottom of the agitator that congeals, it is connected with the inlet tube to congeal agitator bottom lateral wall, the inlet tube stretches out outside the pond body, the top of the agitator that congeals is equipped with PA. The utility model discloses utilize venturi shape to congeal the churn and produce cavitation for sewage and flocculating agent mixed reaction are more abundant, and the separation efficiency that thoughtlessly congeals is high, area is little, with low costs simple to manufacture.

Description

Desulfurization and denitrification PTU system clarification tank

Technical Field

The utility model relates to a clarification tank technical field especially relates to a SOx/NOx control PTU system clarification tank for flue gas wet flue gas desulfurization denitration wastewater treatment.

Background

Flue gas generated by burning fossil fuels such as a coal-fired power plant and the like contains a large amount of acid gases such as sulfur dioxide and the like, which not only can directly cause harm to the ecological environment, but also is an important precursor for forming acid rain, dust haze and the like. Among the various flue gas desulfurization methods, limestone-gypsum wet flue gas desulfurization is the most mature and widely applied desulfurization and denitrification technology in the world at present. In the wet flue gas desulfurization and denitration process flow, the temperature of the flue gas of the boiler needs to be reduced to below 60 ℃. The wet saturation temperature of the general flue gas is about 45 ℃, a relatively economic and effective cooling measure is to adopt a humidification cooling method, but the sewage after humidification and washing contains a certain amount of fly ash, and is not suitable for direct discharge according to the requirement of environmental protection, and a PTU (packet transport unit) waste liquid treatment system is usually adopted for treating the desulfurization and denitrification waste liquid.

In the PTU waste liquid treatment system, in order to remove fly ash in ash water after washing and prevent failure in the circulating process, a clarification tank is adopted in a general treatment system to treat ash water, precipitate and separate, and the following defects also exist in the common clarification tank in the practical engineering application: in order to ensure the efficiency of flocculation reaction, a large amount of PAM (polymeric flocculant) must be added, so that the operation cost is increased; in order to ensure good coagulation reaction effect, the reaction zone must have enough area, the process flow is long, the occupied area is increased, the investment and the manufacturing cost are increased, and the problem of low efficiency is caused by the excessively large occupied area.

Disclosure of Invention

An object of the utility model is to overcome the not enough of above-mentioned technique, provide a separation efficiency height thoughtlessly congeals, area is little, with low costs SOx/NOx control PTU system clarification tank who makes simply.

In order to realize the purpose of the utility model, the utility model adopts the technical scheme that: a desulfurization and denitrification PTU system clarification tank comprises a tank body, wherein a plurality of guide walls vertical to the bottom of the tank body are arranged in the tank body to divide the inner cavity of the tank body into a reaction zone, a buffer zone and a settling zone in sequence; an inclined tube packing layer is arranged at the middle upper part of the settling zone, three sides of the periphery of the inclined tube packing layer are fixed on the inner wall of the tank body of the settling zone through hanging buckles, a vertical baffle is fixed on the inner wall of the tank body at the top of the settling zone, the baffle is parallel to the other side of the inclined tube packing layer, and the other side of the inclined tube packing layer is fixed on the baffle through hanging buckles; the inclined tube packing layer divides the settling zone into a clear water zone and a sludge zone which are distributed up and down; a sludge scraper is arranged at the bottom of the sludge area, and a sludge collecting tank is arranged at the center of the bottom of the sludge area; a plurality of water outlet channels are arranged in the clear water area, a water outlet pipe is also arranged in the clear water area, and all the water outlet channels converge to the same water outlet pipe; the utility model discloses a reactor, including the reaction zone, the upper portion of reaction zone, the impeller of No. two variable frequency speed governing agitators is located the inner chamber bottom of thoughtlessly congealing the agitator, and the inlet tube is connected with the inlet tube outside the inlet tube stretches out the pond body, and the top of thoughtlessly congealing the agitator is equipped with PAM charge device.

Sewage enters a coagulation stirring barrel from a water inlet pipe, rapidly rises under the rapid rotation and pushing of a second variable frequency speed stirrer, and is simultaneously dosed by a PAM dosing device, after the sewage is fully mixed under the stirring action and the water flow cavitation effect, the sewage rapidly leaves the coagulation stirring barrel and is diffused into a water body in a reaction zone, floccules are gradually further enlarged under the slow stirring of a first variable frequency speed stirrer, then the sewage reaches a sludge zone through a buffer zone, one part of floccules downwards precipitate to the bottom of the sludge zone, the other part of floccules ascends along with the water body, the rest floccules to the bottom of the sludge zone under the blocking and filtering of an inclined tube packing layer, the floccules precipitate to be sludge at the bottom of the precipitation zone, the sludge is concentrated under the continuous hanging and sweeping of a sludge scraper, and is scraped into a sludge collecting tank to wait for subsequent treatment; the filtered water body enters the water outlet channel in the clean water area and then flows out from the water outlet pipe.

Furthermore, the coagulation stirring barrel is fixedly connected with the inner wall of the tank body of the reaction zone and the guide wall through a support rod.

Furthermore, a guide plate which inclines downwards is fixed on the outer circumferential wall of the top of the coagulation stirring barrel, and a space is reserved between the guide plate and the inner wall of the reaction area.

Furthermore, the bottom of the buffer area is provided with a mud and dirt prevention slope, the cross section of the mud and dirt prevention slope is a right-angled triangle, and two right-angled adjacent surfaces of the mud and dirt prevention slope are respectively attached to the bottom surface of the buffer area and the side surfaces of the guide wall between the buffer area and the settling area.

Further, mud district bottom surface is the toper structure, and the mud scraper of mud scraper is on a parallel with the toper bottom surface setting in mud district, and the mud collecting vat is located the lowest in mud district.

Furthermore, the first variable frequency speed regulation stirrer and the second variable frequency speed regulation stirrer are positioned on the same axis, so that the water flow distribution is ensured to be uniform and stable.

Further, the sludge collection tank is connected with a pump for pumping sludge.

The utility model has the advantages that: combine traditional flocculation district and reaction zone as an organic whole, reduced area, the agitator that flocculates simultaneously adopts venturi shape structure, utilizes cavitation effect for sewage and flocculating agent mixed reaction are more abundant, have reduced the use of flocculating agent, have improved coagulation reaction efficiency, have reduced enterprise operation cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: the device comprises a tank body 1, a flow guide wall 2, a reaction zone 3, a buffer zone 4, a settling zone 5, an inclined tube packing layer 6, a hanging buckle 7, a clear water zone 8, a sludge zone 9, a mud scraper 10, a sludge collecting tank 11, a water outlet channel 12, a water outlet pipe 13, a first variable frequency speed regulating stirrer 14, a coagulation stirring barrel 15, a second variable frequency speed regulating stirrer 16, a water inlet pipe 17, a PAM dosing device 18, a support rod 19, a guide plate 20, a mud scale prevention slope 21, a mud scraper 101 and an impeller 161.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1, a desulfurization and denitrification PTU system clarification tank comprises a tank body 1, wherein a plurality of guide walls 2 vertical to the bottom of the tank are arranged in the tank body 1 to divide the inner cavity of the tank body 1 into a reaction zone 3, a buffer zone 4 and a settling zone 5 in sequence; an inclined tube packing layer 6 is arranged at the middle upper part of the settling zone 5, three sides of the periphery of the inclined tube packing layer 6 are fixed on the inner wall of the tank body 1 of the settling zone 5 through hanging buckles 7, a vertical baffle is fixed on the inner wall of the tank body 1 at the top of the settling zone 5, the baffle is parallel to the other side of the inclined tube packing layer 6, and the other side of the inclined tube packing layer 6 is fixed on the baffle through hanging buckles 7; the inclined tube packing layer 6 divides the settling zone 5 into a clear water zone 8 and a sludge zone 9 which are distributed up and down; a mud scraper 10 is arranged at the bottom of the sludge area 9, a sludge collecting tank 11 is arranged at the center of the bottom of the sludge area 9, the bottom surface of the sludge area 9 is of a conical structure, a mud scraper 101 of the mud scraper 10 is arranged in parallel to the conical bottom surface of the sludge area 9, the sludge collecting tank 11 is positioned at the lowest part of the sludge area 9, and the sludge collecting tank 11 is connected with a pump for pumping sludge; a plurality of water outlet channels 12 are arranged in the clear water area 8, and all the water outlet channels 12 converge to the same water outlet pipe 13; the reaction zone 3 is communicated with the bottom water of the buffer zone 4, the buffer zone 4 is communicated with the top water of the sludge zone 9, the first variable frequency speed regulation stirrer 14 is arranged at the bottom of the reaction zone 3, the coagulation stirring barrel 15 is fixed at the middle upper part of the reaction zone 3, the coagulation stirring barrel 15 is fixedly connected with the inner wall of the tank body 1 of the reaction zone 3 and the guide wall 2 through a support rod 19, a guide plate 20 which inclines downwards is fixed on the outer circumferential wall of the top of the coagulation stirring barrel 15, a space is reserved between the guide plate 20 and the inner wall of the reaction zone 3, the coagulation stirring barrel 15 is of a hollow structure with an opening at the top, the inner cavity of the coagulation stirring barrel 15 is of a Venturi-shaped structure with two wide ends and a narrow middle part, the second variable frequency speed regulation stirrer 16 is arranged in the inner cavity of the coagulation stirring barrel 15, an impeller 161 of the second variable frequency speed regulation stirrer 16 is positioned at the bottom of, a water inlet pipe 17 extends out of the tank body 1, a PAM dosing device 18 is arranged above the coagulation stirring barrel 15, and the first variable-frequency speed-regulating stirrer 14 and the second variable-frequency speed-regulating stirrer 16 are positioned on the same axis to ensure uniform and stable water flow distribution; the bottom of the buffer zone 4 is provided with a mud-proof slope 21, the cross section of the mud-proof slope 21 is a right-angled triangle, and two right-angled adjacent surfaces of the mud-proof slope 21 are respectively attached to the bottom surface of the buffer zone 4 and the side surface of the guide wall 2 between the buffer zone 4 and the settling zone 5.

Sewage enters a coagulation stirring barrel 15 from a water inlet pipe 17, rapidly rises under the rapid rotation and pushing of a second variable frequency speed stirrer 16, is dosed by a PAM dosing device 18, is rapidly separated from the coagulation stirring barrel 15 and is diffused into a water body in a reaction zone 3 after being fully mixed under the stirring action and the water flow cavitation effect, floccules are gradually increased under the slow stirring of a first variable frequency speed stirrer 14, then reach a sludge zone 9 through a buffer zone 4, a part of floccules are precipitated downwards to the bottom of the sludge zone 9, the other part of floccules rise along with the water body, the rest floccules are precipitated to the bottom of the sludge zone 9 under the blocking and filtering of an inclined tube packing layer 6, the floccules are precipitated to be sludge at the bottom of the precipitation zone 5, are continuously scraped and swept by a sludge scraper 10 to be concentrated and are scraped into a sludge collecting tank 11 to wait for subsequent treatment; the filtered water enters the outlet channel 12 in the clean water zone 8 and then flows out of the outlet pipe 13.

The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. A desulfurization and denitrification PTU system clarification tank comprises a tank body, wherein a plurality of guide walls vertical to the bottom of the tank body are arranged in the tank body to divide the inner cavity of the tank body into a reaction zone, a buffer zone and a settling zone in sequence; an inclined tube packing layer is arranged at the middle upper part of the settling zone, three sides of the periphery of the inclined tube packing layer are fixed on the inner wall of the tank body of the settling zone through hanging buckles, a vertical baffle is fixed on the inner wall of the tank body at the top of the settling zone, the baffle is parallel to the other side of the inclined tube packing layer, and the other side of the inclined tube packing layer is fixed on the baffle through hanging buckles; the inclined tube packing layer divides the settling zone into a clear water zone and a sludge zone which are distributed up and down; a sludge scraper is arranged at the bottom of the sludge area, and a sludge collecting tank is arranged at the center of the bottom of the sludge area; a plurality of water outlet channels are arranged in the clear water area, a water outlet pipe is also arranged in the clear water area, and all the water outlet channels converge to the same water outlet pipe; the utility model discloses a reactor, including the reaction zone, the upper portion of reaction zone, the impeller of No. two variable frequency speed governing agitators is located the inner chamber bottom of thoughtlessly congealing the agitator, and the inlet tube is connected with the inlet tube outside the inlet tube stretches out the pond body, and the top of thoughtlessly congealing the agitator is equipped with PAM charge device.

2. The desulfurization and denitrification PTU system clarification tank of claim 1, wherein the coagulation stirring barrel is fixedly connected with the inner wall of the tank body of the reaction zone and the flow guide wall through a support rod.

3. The desulfurization and denitrification PTU system clarifier according to claim 1, wherein a guide plate which is inclined downwards is fixed on the outer circumferential wall of the top of the coagulating and stirring barrel, and a space is reserved between the guide plate and the inner wall of the reaction zone.

4. The desulfurization and denitrification PTU system clarification tank as claimed in claim 1, wherein the bottom of the buffer zone is provided with a mud and scale prevention slope, the cross section of the mud and scale prevention slope is a right-angled triangle, and two right-angled adjacent surfaces of the mud and scale prevention slope are respectively attached to the bottom surface of the buffer zone and the side surfaces of the flow guide wall of the buffer zone and the settling zone.

5. The desulfurization and denitrification PTU system clarifier according to claim 1, wherein the bottom surface of the sludge area is of a conical structure, a mud scraper of a mud scraper is arranged in parallel with the conical bottom surface of the sludge area, and a sludge collecting tank is positioned at the lowest part of the sludge area.

6. The desulfurization and denitrification PTU system clarifier according to claim 1, wherein the first variable-frequency speed-regulating stirrer and the second variable-frequency speed-regulating stirrer are positioned on the same axis.

7. The SOx/NOx control PTU system clarifier of claim 1, wherein the sludge collection tank is connected to a pump for pumping sludge.