Nuclear biochemical decontamination waste liquid treatment device

Abstract

The utility model provides a nuclear biochemical decontamination waste liquid treatment device which comprises a flocculation reactor, a centrifugal machine and membrane separation equipment, and is characterized in that the input end of the flocculation reactor is connected with a water pump, and the output end of the flocculation reactor is connected with the input end of the centrifugal machine; at least one decay tank is connected in series between the output end of the centrifugal machine and the input end of the membrane separation equipment; according to the utility model, the water pump provides power to pump the waste liquid into the flocculation reactor for flocculation and sedimentation, solid impurities in the waste liquid are separated through the centrifugal machine, the membrane separation equipment is used for reverse osmosis separation and concentration, and the decay tank provides a space for the waste liquid, so that the radioactive waste liquid is decayed; a plurality of decay tanks are connected in series, so that the retention time of the wastewater in the decay tanks can be prolonged, and the decay effect of radioactive elements in the wastewater is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste liquid treatment, and in particular relates to a nuclear, biological and chemical decontamination waste liquid treatment device. Background Art

[0002] Decontamination refers to the technical process of disinfecting, decontaminating and sterilizing the ground, equipment, facilities, personnel and environment at the site of a chemical accident that have been contaminated by chemical pollutants, radioactive substances and biological agents through mechanical, physical or chemical methods. It is an effective way to make dangerous substances lose their toxic effects and effectively prevent their spread. It is an important measure to eliminate the toxic hazards of contaminated bodies and contaminated areas.

[0003] In the prior art, the Chinese utility model patent document with authorization publication number CN209266035U discloses another nuclear, biological and chemical decontamination waste liquid pretreatment device, which uses a combined process of "flocculation + centrifugation + residual chlorine removal + cavitation" to pretreat the nuclear, biological and chemical decontamination waste liquid. However, it does not provide a dedicated space for the radioactive waste liquid to decay. The currently commonly adopted method is to connect decay pools in series in the treatment device, each of which is provided with an inlet pipe and an outlet pipe. After the wastewater enters the inlet pipe, it flows directly to the outlet pipe. The wastewater has a short residence time inside the decay pool, which affects the decay effect of the radioactive elements in the wastewater.

[0004] Therefore, it is necessary to design a nuclear, biological and chemical decontamination waste liquid treatment device that can extend the residence time of wastewater in the decay pool and ensure the decay effect of radioactive elements in the wastewater to solve the current technical problems. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the utility model provides a nuclear, biological and chemical decontamination waste liquid treatment device which prolongs the residence time of wastewater in a decay pool and ensures the decay effect of radioactive elements in the wastewater.

[0006] The technical solution of the utility model is: a nuclear, biological and chemical decontamination waste liquid treatment device, including a flocculation reactor, a centrifuge and a membrane separation device, characterized in that: the input end of the flocculation reactor is connected to a water pump, the output end of the flocculation reactor is connected to the input end of the centrifuge, and at least one decay tank is connected in series between the output end of the centrifuge and the input end of the membrane separation device; the decay tank has a tank body, the top end of the tank body has a water inlet pipe, the bottom end side of the tank body has a water outlet pipe, the interior of the tank body is sequentially provided with a filter chamber, a first buffer chamber, a first buffer hopper, a second buffer hopper, and a second buffer chamber from top to bottom; the bottom of the filter chamber is connected to the first buffer chamber, the first buffer chamber is connected to the inner bottom of the first buffer hopper, the first buffer hopper is connected to the inner bottom of the second buffer hopper, and the second buffer hopper is connected to the inner bottom of the second buffer chamber; the outlet pipe is provided on the top side of the second buffer chamber.

[0007] A first communicating tube is centrally provided at the bottom of the first buffer chamber for connecting the first buffer chamber with the first buffer hopper. A gap is left between the top end of the first communicating tube and the bottom of the filter chamber, and a gap is left between the bottom end of the first communicating tube and the inner bottom of the first buffer hopper.

[0008] A baffle corresponding to the first communicating pipe is fixedly provided at the bottom of the filter cavity, and a filter ring is provided on the outer side of the baffle.

[0009] A retaining ring is fixedly arranged on the outer side of the bottom of the baffle.

[0010] The bottom of the first buffer hopper is provided with second communicating pipes in a circumferential array for connecting the first buffer hopper with the second buffer hopper. The top of the second communicating pipe is lower than the top of the first buffer hopper, and a gap is left between the bottom end of the second communicating pipe and the inner bottom of the second buffer hopper.

[0011] A third communicating pipe is centrally provided at the bottom of the second buffer hopper for connecting the second buffer hopper with the second buffer cavity. The top end of the third communicating pipe is lower than the top end of the second buffer hopper, and a gap is left between the bottom end of the third communicating pipe and the inner bottom of the second buffer cavity.

[0012] The tank body comprises a tank body main body, and a tank body cover plate is detachably fixedly provided on the top of the tank body.

[0013] Beneficial effects of the utility model:

[0014] (1) In the present invention, a water pump provides power to pump the waste liquid into a flocculation reactor for flocculation and sedimentation, a centrifuge is used to separate solid impurities in the waste liquid, a membrane separation device is used for reverse osmosis separation and concentration, and a decay tank provides space for the waste liquid to decay with radioactivity. Connecting multiple decay tanks in series can extend the residence time of the waste water inside the decay tank;

[0015] (2) When the wastewater enters the tank through the water inlet pipe, the impurities in the wastewater can be filtered again through the filter chamber. At the same time, the wastewater flows through the filter chamber, the first buffer chamber, the first buffer bucket, the second buffer bucket and the second buffer chamber in sequence, which can further extend the residence time of the wastewater in the decay pool and ensure the decay effect of the radioactive elements in the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the nuclear, biological and chemical decontamination waste liquid treatment device of the present invention.

[0017] Figure 2 It is a structural diagram of the decay cell in the utility model.

[0018] Figure 3 for Figure 2 Cross-section view at AA in the middle. DETAILED DESCRIPTION

[0019] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and does not constitute any limitation on the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully convey the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0020] The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are simply used to distinguish different parts. Terms such as "include" or "comprising" mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] like Figures 1 to 3As shown, the nuclear, biological and chemical decontamination waste liquid treatment device includes a flocculation reactor 2, a centrifuge 3 and a membrane separation device 5. The input end of the flocculation reactor 2 is connected to a water pump 1, and the output end of the flocculation reactor 2 is connected to the input end of the centrifuge 3. At least one decay tank 4 is connected in series between the output end of the centrifuge 3 and the input end of the membrane separation device 5; the water pump 1 provides power to pump the waste liquid into the flocculation reactor 2 for flocculation precipitation, and the solid impurities in the waste liquid are separated by the centrifuge 3. The membrane separation device 5 is used for reverse osmosis separation and concentration. The decay tank 4 provides space for the waste liquid to decay with radioactive waste liquid. Connecting multiple decay tanks 4 in series can extend the residence time of the wastewater inside the decay tank and ensure the decay effect of radioactive elements in the wastewater; the decay tank 4 has a tank body 41, the top of the tank body 41 has an inlet pipe 42, the bottom side of the tank body 41 has an outlet pipe 43, and the tank body 41 has a plurality of decay tanks 4 in series. From top to bottom, a filter chamber 44, a first buffer chamber 45, a first buffer hopper 46, a second buffer hopper 47, and a second buffer chamber 49 are sequentially provided inside; the bottom of the filter chamber 44 is connected to the first buffer chamber 45, the first buffer chamber 45 is connected to the inner bottom of the first buffer hopper 46, the first buffer hopper 46 is connected to the inner bottom of the second buffer hopper 47, and the second buffer hopper 47 is connected to the inner bottom of the second buffer chamber 49; the outlet pipe 43 is provided on one side of the top of the second buffer chamber 49; when the wastewater enters the tank body 41 through the water inlet pipe 42, the impurities in the wastewater can be filtered again through the filter chamber 44. At the same time, the wastewater flows through the filter chamber 44, the first buffer chamber 45, the first buffer hopper 46, the second buffer hopper 47 and the second buffer chamber 49 in sequence, which can further extend the residence time of the wastewater in the decay tank and ensure the decay effect of radioactive elements in the wastewater.

[0022] In some embodiments, a first connecting pipe 451 is centrally provided at the bottom of the first buffer chamber 45 for connecting it with the first buffer bucket 46. A gap is left between the top end of the first connecting pipe 451 and the bottom of the filter chamber 44, and a gap is left between the bottom end of the first connecting pipe 451 and the inner bottom of the first buffer bucket 46. After the wastewater is filtered through the filter chamber 44, it falls into the first buffer chamber 45. When the waste liquid level inside the first buffer chamber 45 continues to rise to the upper end of the first connecting pipe 451, the waste liquid enters the first connecting pipe 451 and flows down along the first connecting pipe 451 to the inner bottom of the first buffer bucket 46, thereby increasing the flow path of the waste liquid and extending the residence time of the waste liquid.

[0023] In some embodiments, a baffle 441 corresponding to the first connecting tube 451 is fixedly provided at the bottom of the filter chamber 44. The baffle 441 is used to prevent the waste liquid from dripping directly into the inside of the first connecting tube 451. A filter ring 443 is provided on the outside of the baffle 441. The filter ring 443 is used to filter the waste liquid.

[0024] In some embodiments, a retaining ring 442 is fixedly provided on the outer side of the bottom of the baffle 441 . The retaining ring 442 is used to prevent the waste liquid flowing out of the filter ring 443 from flowing into the interior of the first connecting pipe 451 .

[0025] In some embodiments, the bottom of the first buffer hopper 46 is provided with a circumferential array of second connecting tubes 461 for connecting it to the second buffer hopper 47. The top of the second connecting tubes 461 is lower than the top of the first buffer hopper 46, and a gap is left between the bottom of the second connecting tubes 461 and the inner bottom of the second buffer hopper 47. When the waste liquid flows into the first buffer hopper 46 through the first connecting tubes 461, the liquid level inside the first buffer hopper 46 gradually rises. When the liquid level reaches the upper end of the second connecting tubes 461, the waste liquid enters the second connecting tubes 461 and flows down along the second connecting tubes 461 to the inner bottom of the second buffer pad 47, further increasing the flow path of the waste liquid and extending the residence time of the waste liquid.

[0026] In some embodiments, a third connecting tube 471 is centrally provided at the bottom of the second buffer hopper 47 for connecting it with the second buffer chamber 49. The top of the third connecting tube 471 is lower than the top of the second buffer hopper 47, and a gap is left between the bottom end of the third connecting tube 471 and the inner bottom of the second buffer chamber 49, thereby further increasing the flow path of the waste liquid and extending the residence time of the waste liquid.

[0027] In some embodiments, the tank body 41 has a tank body main body 411, and a tank body cover 412 is detachably fixedly provided on the top of the tank body main body 411. Removing the tank body cover 412 can clean the impurities inside the filter chamber 44; specifically, a flange is provided on the outside of the top end of the tank body main body 411, and the tank body cover 412 is detachably fixedly connected to the flange by a bolt and nut mechanism.

[0028] In the above embodiment, the first buffer hopper 46 and the second buffer hopper 47 are fixedly mounted inside the tank body 411 by support plates 48 arranged in a circumferential array on the outer side of their bottom ends. The above-mentioned water inlet pipe 42 is the input end of the decay tank 4, and the water outlet pipe 43 is the output end of the decay tank 4.

[0029] Thus far, various embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details well known in the art have not been described. Based on the above description, those skilled in the art will fully understand how to implement the technical solutions disclosed herein.

[0030] The above-described embodiments represent only some of the embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present utility model, and these modifications and improvements fall within the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model patent shall be based on the appended claims.

Claims

1. A nuclear, biological and chemical decontamination wastewater treatment device, comprising a flocculation reactor, a centrifuge and a membrane separation device, characterized in that: The input end of the flocculation reactor is connected to a water pump, the output end of the flocculation reactor is connected to the input end of the centrifuge, and at least one decay tank is connected in series between the output end of the centrifuge and the input end of the membrane separation device; the decay tank has a tank body, the top end of the tank body has a water inlet pipe, the bottom end of the tank body has a water outlet pipe, and the interior of the tank body is sequentially provided with a filter chamber, a first buffer chamber, a first buffer hopper, a second buffer hopper, and a second buffer chamber from top to bottom; the bottom of the filter chamber is connected to the first buffer chamber, the first buffer chamber is connected to the inner bottom of the first buffer hopper, the first buffer hopper is connected to the inner bottom of the second buffer hopper, and the second buffer hopper is connected to the inner bottom of the second buffer chamber; the outlet pipe is provided on the top side of the second buffer chamber.

2. The nuclear, biological and chemical decontamination waste liquid treatment device according to claim 1, characterized in that: A first communicating tube is centrally provided at the bottom of the first buffer chamber for connecting the first buffer chamber with the first buffer hopper. A gap is left between the top end of the first communicating tube and the bottom of the filter chamber, and a gap is left between the bottom end of the first communicating tube and the inner bottom of the first buffer hopper.

3. The nuclear, biological and chemical decontamination waste liquid treatment device according to claim 2, characterized in that: A baffle corresponding to the first communicating pipe is fixedly provided at the bottom of the filter cavity, and a filter ring is provided on the outer side of the baffle.

4. The nuclear, biological and chemical decontamination waste liquid treatment device according to claim 3, characterized in that: A retaining ring is fixedly arranged on the outer side of the bottom of the baffle.

5. The nuclear, biological and chemical decontamination waste liquid treatment device according to claim 1 is characterized by: The bottom of the first buffer hopper is provided with second communicating pipes in a circumferential array for connecting the first buffer hopper with the second buffer hopper. The top of the second communicating pipe is lower than the top of the first buffer hopper, and a gap is left between the bottom end of the second communicating pipe and the inner bottom of the second buffer hopper.

6. The nuclear, biological and chemical decontamination waste liquid treatment device according to claim 1, characterized in that: A third communicating pipe is centrally provided at the bottom of the second buffer hopper for connecting the second buffer hopper with the second buffer cavity. The top end of the third communicating pipe is lower than the top end of the second buffer hopper, and a gap is left between the bottom end of the third communicating pipe and the inner bottom of the second buffer cavity.

7. The nuclear, biological and chemical decontamination waste liquid treatment device according to claim 1, characterized in that: The tank body comprises a tank body main body, and a tank body cover plate is detachably fixedly provided on the top of the tank body.

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