CN114639498A

CN114639498A - Medical radioactive waste water decay pool

Info

Publication number: CN114639498A
Application number: CN202011485698.2A
Authority: CN
Inventors: 刘颖; 苏晓书; 冀东
Original assignee: FOURTH INSTITUTE OF NUCLEAR ENGINEERING OF CNNC
Current assignee: FOURTH INSTITUTE OF NUCLEAR ENGINEERING OF CNNC
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2022-06-17

Abstract

The invention belongs to a pool, and particularly relates to a medical radioactive wastewater decay pool. A medical radioactive waste water decay pool comprises a long pool, wherein four serially connected and mutually communicated box bodies are arranged in the long pool. The invention has the following effects: the inlet and outlet of single tank are distributed in diagonal direction to prolong the fluid path and improve decay effect. A baffle plate is arranged in each tank body close to the inlet so as to reduce the occurrence of short flow; the baffles in each cell are spaced from the cell wall (inlet cell wall) at unequal distances in order to enhance fluid flow to improve decay performance of the decay cell. The chamfer of establishing different angles is added to decay bottom both sides of pool, and the purpose is that improve the interior fluid flow of cell body, reduce the stagnant water district, and the effective decay volume of increase decay pond, and then improve the decay effect of decay pond to waste water. The baffle plate is additionally provided with the shunt hole, so that a dead water area in the decay pool body is further reduced, the effective decay volume of the pool body is increased, and the decay effect is improved.

Description

Medical radioactive waste water decay pool

Technical Field

The invention belongs to a water pool, and particularly relates to a medical radioactive wastewater decay pool.

Background

With the development of nuclear medicine, nuclide therapy is widely used in clinical applications. More and more large and medium-sized hospitals are provided with nuclear medicine subjects for treating human bodies by using radioactive medicines, and when the treatment method is adopted, patients need to inject or take the radioactive medicines, and then the radioactive medicines are discharged along with human excrement and body fluid through metabolism.

Radionuclides have their natural decay laws, so natural decay is mostly used for reduction and elimination. Generally, radioactive waste water discharged from containers containing isotopes and laboratory wash water, labeled compounds, etc., which has a high concentration and a long half-life, is stored in containers and naturally decays; the excrement generated after the patient takes the radioactive isotopes 131I, 99mTc and the like is low in concentration and short in half-life period, and needs to be discharged into a decay tank, decays to the national emission limit value and then is discharged.

At present, the structure of the decay tank is mainly divided into a parallel type and a serial type, each tank body of the parallel type decay tank operates independently, a plurality of ports are arranged, the decay effect is good, and the logic is clear. The serial-type decay pond separates pond mutual interference each, and the single-port is discharged, difficult design, and the ubiquitous structure is unreasonable at present, the stagnant water district is great, mix inhomogeneous scheduling problem, and under the same condition, the treatment effect generally is not as than parallel decay pond.

A typical in-line decay cell configuration that is currently in widespread use is shown in FIG. 1. The series decay tank has the characteristics of no need of any additional equipment, no need of special maintenance at ordinary times, simple operation and convenient management. The drawback is that the waste water flowing into the decay tank at different times is not fully mixed, and the serial mode may produce short flow under the conditions of water flow disturbance and existence of dead water area, so that the retention time in the decay tank is insufficient, and the waste water is automatically discharged into the sewage pipe network, thereby causing environmental pollution. Because the existence of stagnant water district, the shared effective pond volume of radioactive waste water decay reduces, and radioactive waste water stays decay time in the decay pond shorter, and then leads to its decay effect relatively poor, and the radioactive waste water of outlet can not discharge to reach standard.

Disclosure of Invention

The invention aims at overcoming the defects of the prior art and provides a medical radioactive wastewater decay tank.

The invention is realized by the following steps:

a decay pool for radioactive medical waste water is composed of a long pool with four serially connected boxes, and a water inlet and a water outlet.

The medical radioactive wastewater decay pond is characterized in that each box body is provided with a baffle plate, a chamfer on the bottom surface, a water inlet and outlet and a diversion hole.

The medical radioactive wastewater decay pond is characterized in that the water inlet and outlet are arranged on the side wall, the baffle plate is arranged in the middle of the box body, and the diversion hole is formed in the baffle plate.

A therapeutic radioactive waste decay tank as described above, wherein the baffle extends from the top surface towards the bottom to provide a small flow space for the liquid to exit.

The radioactive medical waste water decay tank as described above, wherein chamfers are respectively provided on the side walls where the water inlet and the water outlet are located.

The radioactive medical waste water decay pond has 3 diversion holes distributed homogeneously on the baffle plate.

A radioactive waste decay tank as hereinbefore described wherein the baffles in each box are at a different distance from the walls of the box.

The medical radioactive waste water decay tank has the advantages that the angles of the chamfers of the four box bodies are different.

The invention has the following effects: the inlet and outlet of single tank are distributed in diagonal direction to prolong the fluid path and improve decay effect.

A baffle plate is arranged in each tank body close to the inlet so as to reduce the occurrence of short flow; the baffles in each cell are spaced unequal distances from the cell wall (inlet cell wall) in order to enhance fluid flow to improve decay efficiency of the cell.

The chamfer of establishing different angles is added to decay bottom both sides of pool, and the purpose is that improve the interior fluid flow of cell body, reduce the stagnant water district, and the effective decay volume of increase decay pond, and then improve the decay effect of decay pond to waste water.

The baffle plate is additionally provided with the shunt holes, so that a dead water area in the pool body of the decay pool is further reduced, the effective decay volume of the pool body is increased, and the decay effect is improved.

Drawings

FIG. 1 is a schematic diagram of a typical prior art in-line decay tank

FIG. 2 is a schematic diagram of the decay effect of a typical prior art in-line decay cell

FIG. 3 is a plan view of a series-type decay tank structure

FIG. 4 is a cross-sectional view of the series-type decay tank structure A-A

FIG. 5 is a sectional view of a series-type cell structure B-B

FIG. 6 is a cross-sectional view of a series-connected cell configuration C-C

FIG. 7 is a schematic view of a tandem type decay cell structure

FIG. 8 schematic diagram of decay Effect of in-line decay cells

Wherein: 1. the first decay pool, the second decay pool, the third decay pool, the fourth decay pool, the ground, the concrete, the waste water inlet, the waste water outlet, the pool wall, the baffle plate, the chamfer angle, the water inlet and outlet, the water outlet and the diversion hole, the hole, and the hole, the diversion hole, the diversion hole, the hole, and the hole, the diversion hole, the

Detailed Description

A medical radioactive waste water decay tank, a novel series radioactive waste water decay tank. The decay tank mainly comprises: pool wall, baffle plate, chamfer, water outlet (inlet) and diversion hole, as shown in attached figure.

The inlet and outlet of single tank are distributed in diagonal direction to prolong the fluid path and improve decay effect.

Claims

1. A radioactive medical wastewater decay pond is characterized in that: comprises a long pool, wherein four serially connected and mutually communicated box bodies are arranged in the long pool.

2. A therapeutic radioactive waste water decay pond, according to claim 1, wherein: each box body is provided with a baffle plate (10), a chamfer (11) on the bottom surface, a water inlet and outlet (12) and a shunting hole (13).

3. A radioactive waste water decay tank for medical use according to claim 2, wherein: the water inlet and outlet (12) is arranged on the side wall, the baffle plate (10) is arranged in the middle of the box body, and the shunting holes (13) are arranged on the baffle plate (10).

4. A radioactive waste water decay tank for medical use according to claim 3, wherein: the baffle plate (10) extends from the top surface to a position close to the bottom and provides a small flow space for the liquid to flow out.

5. A radioactive waste decay pond according to claim 4, wherein: chamfers (11) are respectively arranged on the side walls where the water inlet and outlet openings (12) are arranged.

6. A radioactive waste decay pond according to claim 5, wherein: the number of the shunting holes (13) is 3, and the shunting holes are uniformly distributed on the baffle plate.

7. A radioactive waste decay pond according to claim 6, wherein: the baffles (10) in each box should be at unequal distances from the box walls.

8. A therapeutic radioactive waste water decay pond, according to claim 7, wherein: the angles of the chamfers (11) of the four box bodies are different.