CN111462933A - A waste solidification system and method - Google Patents

Abstract

Embodiments of the present invention provide a waste solidification system and method. The waste solidification system includes: a solidification device, wherein a stirring device is arranged in the solidification device; a waste conveying device, an output port of the waste conveying device and the solidifying device are The input port of the first feeding device is connected to the input port of the solidifying device for conveying the waste to the solidifying device; the output port of the first feeding device is connected to the input port of the solidifying device, which is used to transfer the powdered gelatinized The material is transported to the curing device; the second feeding device, the output port of the second feeding device is connected with the input port of the curing device, and is used for transporting the paste-like cementitious material to the curing device. The embodiment of the present invention provides a waste solidification system with simple structure, simple operation and low cost.

Description

A waste solidification system and method

technical field

Embodiments of the present invention relate to the technical field of waste treatment, and in particular, to a system and method for solidifying waste.

Background technique

The development of nuclear engineering and nuclear technology has led to the generation of more and more radioactive waste. Radioactive waste is harmful to human body and cannot be placed at will, but must be disposed of properly. In particular, the radioactive waste generated by the nuclear energy industry is extremely harmful to the human body. The safe disposal of nuclear waste is a major issue related to the sustainable development of nuclear energy. The amount of radioactive waste produced by some small nuclear technology application sites is relatively small. In order to save the cost of building a complex radioactive waste treatment system, the untreated radioactive waste is directly discharged, but this method will seriously pollute the living environment of human beings. The cost of building conventional waste treatment facilities alone is prohibitive and the utilization rate is low.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a waste solidification system and method, so as to solve the problem that the volume of radioactive waste generated in some small nuclear technology application sites is small, and in order to save the cost of building a complex radioactive waste treatment system, the untreated radioactive waste is directly However, this method will seriously pollute the living environment of human beings, and the cost of building conventional waste treatment facilities alone is too high and the utilization rate is low.

In a first aspect, an embodiment of the present invention provides a waste solidification system, including:

a curing device, wherein a stirring device is arranged in the curing device;

a waste conveying device, the output port of the waste conveying device is connected with the input port of the solidifying device, and is used for conveying waste to the solidifying device;

a first feeding device, the output port of the first feeding device is connected with the input port of the curing device, and is used for conveying the powdered cementitious material to the curing device;

The second feeding device, the output port of the second feeding device is connected with the input port of the curing device, and is used for conveying the slurry-like cementitious material to the curing device.

Optionally, the output port of the waste conveying device is connected to the first input port of the solidifying device;

The output port of the first feeding device is connected with the second input port of the curing device;

The output port of the second feeding device is connected with the third input port of the curing device.

Optionally, the first input port, the second input port and the third input port are arranged at different positions on the top of the curing device.

Optionally, the waste solidification system further includes:

A drug delivery device, the output port of the drug delivery device is connected with the input port of the curing device, and is used for delivering the drug to the curing device.

Optionally, the waste conveying device includes a waste storage tank and a waste conveying pump, the output port of the waste storage tank is connected to the input port of the waste conveying pump, and the output port of the waste conveying pump is connected to the solidifying device. input port connection.

Optionally, the stirring device includes a stirring head and a stirring paddle, and the stirring head and the stirring paddle are detachably connected.

Optionally, the first feeding device includes a feeding hopper and a conveyor, the output port of the feeding hopper is connected to the input port of the conveyor, and the output port of the conveyor is connected to the input port of the curing device. ;

and / or

The second feeding device includes a slurry tank and a slurry delivery pump, the output port of the slurry tank is connected to the input port of the slurry delivery pump, and the output port of the slurry delivery pump is connected to the input port of the curing device .

Optionally, the drug delivery device includes a drug tank and a drug delivery pump, the output port of the drug tank is connected to the input port of the drug delivery pump, and the output port of the drug delivery pump is connected to the input port of the curing device. .

Optionally, the curing device is a curing barrel, an end cover is provided on the top of the curing barrel, and the cementing material is cement.

In a second aspect, an embodiment of the present invention provides a waste solidification method, which is applied to the waste solidification system according to the embodiment of the present invention, and the method includes:

conveying waste from the waste conveying device to the solidifying device, the waste including one or more of radioactive wastewater, mud, raffinate, and waste resin;

conveying the powdered cementitious material from the first feeding device to the curing device;

Use a stirring device to stir the mixture in the solidifying device;

placing the curing device for a preset period of time to harden the mixture in the curing device;

The paste-like cementitious material is conveyed from the second feeding device to the curing device so that the paste-like cementitious material covers the hardened mixture.

The waste solidification system of the embodiment of the present invention includes a solidification device, a waste conveying device, a first feeding device and a second feeding device, the waste conveying device conveys the waste to the solidifying device, and the first feeding device The powdery cementitious material is sent to the curing device, the stirring device mixes and stirs the waste and the cementing material in the curing device, and the second feeding device conveys the slurry cementitious material to the curing device. The solidifying device is used so that the slurry-like cementitious material covers the mixture of waste and cementitious material. The embodiment of the present invention provides a waste solidification system with simple structure, simple operation and low cost.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

Fig. 1 is one of the structural schematic diagrams of a waste solidification system provided by an embodiment of the present invention;

2 is a second schematic structural diagram of a waste solidification system provided by an embodiment of the present invention;

FIG. 3 is a schematic flowchart of a method for solidifying waste according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a waste solidification system provided by an embodiment of the present invention. As shown in FIG. 1, the waste solidification system includes:

The curing device 1 is provided with a stirring device 5 in the curing device 1;

The waste conveying device 2, the output port of the waste conveying device 2 is connected with the input port of the solidifying device 1, and is used for conveying the waste to the solidifying device 1;

The first feeding device 3, the output port of the first feeding device 3 is connected with the input port of the curing device 1, and is used for conveying the powdered cementitious material to the curing device 1;

The second feeding device 4 , the output port of the second feeding device 4 is connected with the input port of the curing device 1 , and is used for conveying the slurry-like cementitious material to the curing device 1 .

Wherein, the curing device 1 is a device having a certain accommodating space, and the waste is cured in the accommodating space of the curing device 1 . Specifically, the curing device 1 may be in a cylindrical shape or a square barrel shape, and the specific shape of the curing device 1 is not limited in the embodiment of the present invention. As a preferred embodiment, the curing device 1 is a curing barrel, and the curing barrel may be a 200L standard waste barrel. As shown in FIG. 2 , the stirring device 5 may include a stirring paddle 52 , and the stirring device 5 is used for stirring the waste and the cementitious material in the curing device 1 , so as to mix the waste and the cementing material in the curing device 1 uniformly.

Wherein, the waste conveying device 2 is used for conveying the waste to the solidifying device 1, and the waste may include radioactive waste water, mud, steam residue, waste resin and the like. The waste conveying device 2 may include a conveying pump, through which the waste placed in the waste storage tank 21 or a waste storage place such as a waste pool is pumped out and conveyed to the solidifying device 1 .

Wherein, the first feeding device 3 may include a conveyor 32, and the powdery cementitious material may be conveyed to the curing device 1 through the conveyor 32, and the cementitious material may be cement, lime, resin, or the like. As a preferred embodiment, the cementitious material is cement, and the powdered cement is delivered to the curing device 1 through the first feeding device 3 . The first feeding device 3 may also include a powder metering component, which may be used to meter the weight of the cementitious material to be conveyed, so as to facilitate quantitative conveying.

Wherein, the second feeding device 4 may include a slurry delivery pump 42 , through which the slurry-like cementitious material placed in a slurry storage place such as a slurry tank 41 or a slurry tank is extracted and output to the curing device 1 . The slurry-like cementitious material can be a slurry formed by mixing water and the cementitious material in a preset ratio, and the slurry can form a hardened product of the cementitious material after being placed for a certain period of time. Taking cement as the cementitious material as an example, the weight ratio of water and cement may be 0.3, or may be 0.5, which is not limited in the embodiment of the present invention. The second feeding device 4 may also include a slurry metering component, which may be used to meter the volume of the delivered slurry, so as to facilitate quantitative delivery.

Among them, the waste solidification system can be controlled manually, and can also be controlled by PLC (Programmable Logic Controller, programmable logic controller). The input port of the curing device 1 may have only one input port, or may include multiple input ports.

The waste solidification system of the embodiment of the present invention includes a solidification device 1, a waste conveying device 2, a first feeding device 3 and a second feeding device 4. The waste conveying device 2 conveys waste to the solidifying device 1, and the first feeding device 3 The powdery cementitious material is transported to the curing device 1, the stirring device 5 mixes and stirs the waste and the cementitious material in the curing device 1, and the second feeding device 4 transports the slurry cementitious material to the curing device 1, The mixture of waste and cementitious material is covered with a slurry of cementitious material. The embodiment of the present invention provides a waste solidification system with simple structure, simple operation and low cost.

Optionally, as shown in FIG. 2 , the output port of the waste conveying device 2 is connected to the first input port of the curing device 1;

The output port of the first feeding device 3 is connected with the second input port of the curing device 1;

The output port of the second feeding device 4 is connected to the third input port of the curing device 1 .

The first input port, the second input port and the third input port are different input ports of the curing device 1 . The waste conveying device 2 , the first feeding device 3 and the second feeding device 4 are respectively connected through different input ports of the curing device 1 , the inputs between the devices do not affect each other, and the installation and disassembly are more convenient.

Optionally, as shown in FIG. 2 , the first input port, the second input port and the third input port are arranged at different positions on the top of the curing device 1 .

The top end of the curing device 1 may be provided with an end cover 11 , and the first input port, the second input port and the third input port may be respectively provided at different positions of the end cover 11 . By arranging the first input port, the second input port and the third input port at different positions at the top of the curing device 1 , compared with arranging each input port in the middle or lower part of the curing device 1 , the advantages of the curing device 1 can be more fully utilized. Use space.

Optionally, as shown in Figure 2, the waste solidification system further includes:

In the drug delivery device 6 , the output port of the drug delivery device 6 is connected with the input port of the curing device 1 , and is used for delivering the drug to the curing device 1 .

The medicine can be a chemical agent. When the waste conveying device 2 transports the waste into the curing device 1, the chemical agent can be transported into the curing device 1 through the drug delivery device 6, and the chemical agent is used to adjust the acidity and alkalinity of the waste. The drug delivery device 6 may also include a medical liquid metering component, which can be used to measure the volume of the liquid drug to be delivered, so as to facilitate quantitative delivery.

The medicine is delivered to the solidification device 1 by the medicine delivery device 6, and the acidity and alkalinity of the waste are adjusted, which can improve the waste treatment capacity of the waste solidification system.

Optionally, as shown in FIG. 2 , the waste conveying device 2 includes a waste storage tank 21 and a waste conveying pump 22. The output port of the waste storage tank 21 is connected to the input port of the waste conveying pump 22, and the output port of the waste conveying pump 22 is connected to the input port of the waste conveying pump 22. The input port of the curing device 1 is connected.

Wherein, the waste storage tank 21 and the waste conveying pump 22 can be connected by a hose, so that when the waste storage tank 21 is emptied, it is convenient to be replaced to the next waste storage tank 21 .

Optionally, as shown in FIG. 2 , the stirring device 5 includes a stirring head 51 and a stirring paddle 52 , and the stirring head 51 and the stirring paddle 52 are detachably connected.

The stirring paddle 52 can be arranged in the curing device 1 , the stirring head 51 can be arranged outside the curing device 1 , and a positioning point can be welded in the curing device 1 to support the stirring paddle 52 arranged in the center of the curing device 1 . The stirring paddle 52 can be a disposable stirring paddle 52 , and after the waste is stirred uniformly, it remains in the solidifying device 1 and becomes a part of the solid waste, so as to reduce the risk of radioactive contamination spreading. The stirring head 51 can be engaged and fixed with the disposable stirring paddle 52 to provide power for the disposable stirring paddle 52 to fully mix the waste and the gel material in the curing device 1 .

Optionally, as shown in FIG. 2 , the first feeding device 3 includes a feeding hopper 31 and a conveyor 32 , the output port of the feeding hopper 31 is connected to the input port of the conveyor 32 , and the output port of the conveyor 32 is connected to the solidifying device 1 input port connection;

and / or

The second feeding device 4 includes a slurry tank 41 and a slurry delivery pump 42 .

Wherein, the cementitious material is cement as an example for description, the feeding hopper 31 may be a cement powder feeding hopper 31 , and the conveyor 32 may be a screw conveyor 32 . The slurry tank 41 is provided with a pipeline fixing plate for fixing various pipelines that supply materials to the slurry tank 41 . The second feeding device 4 also includes a slurry input port 43 , which can supply slurry to the slurry tank 41 . The cementitious material is transported through the feeding hopper 31 and the conveyor 32, and the slurry tank 41 and the slurry transport pump 42 transport the slurry. The structure is simple, and it is convenient to form a movable waste solidification system.

Optionally, as shown in FIG. 2 , the drug delivery device 6 includes a drug tank 61 and a drug delivery pump 62 , the output port of the drug tank 61 is connected to the input port of the drug delivery pump 62 , and the output port of the drug delivery pump 62 is connected to the curing device. 1 is connected to the input port, the structure is simple, and it is convenient to form a movable waste solidification system.

Optionally, the curing device 1 is a curing barrel, an end cover 11 is provided on the top of the curing barrel, and the cementing material is cement.

The end cover 11 can be a pipeline fixing plate for fixing various types of pipelines that supply materials to the curing barrel. At the same time, the end cover 11 can also prevent the waste in the curing barrel from splashing out of the curing barrel.

Optionally, as shown in Figure 2, the waste solidification system further includes a water supply device 7, the first output port of the water supply device 7 is connected to the input port of the solidification device 1, and the second output port of the water supply device 7 is connected to the slurry tank. 41 input port connection.

Wherein, the water supply device 7 is used to inject process water into the solidification device 1 and the slurry tank 41. When the waste solidification system needs to be flushed, the water supply device 7 can be turned on.

Please refer to FIG. 3. FIG. 3 is a schematic flowchart of a method for solidifying waste according to an embodiment of the present invention, which is applied to the solidifying system for waste according to an embodiment of the present invention. The method includes:

Step 101 , conveying waste from the waste conveying device to the solidifying device, where the waste includes one or more of radioactive waste water, mud, steam residue and waste resin;

Step 102, conveying the powdered cementitious material from the first feeding device to the curing device;

Step 103, using a stirring device to stir the mixture in the curing device;

Step 104, placing the curing device for a preset period of time to harden the mixture in the curing device;

Step 105 , conveying the paste-like cementitious material from the second feeding device to the curing device so that the paste-like cementitious material covers the hardened mixture.

Wherein, after the waste in the solidification device is solidified and formed, the second feeding device injects the configured paste-like cementitious material into the upper part of the solidified waste body of the solidification device to form a bucket cap, which is further beneficial to prevent radioactive substances in the solidification device. diffusion.

As a preferred embodiment, taking cement as the cementing material as an example, a solidifying barrel with a disposable stirring paddle is placed under the pipeline fixing plate, and the radioactive waste in the waste storage tank is pumped into the solidifying barrel by a waste conveying pump. , after reaching the preset amount of waste, stop the waste conveying pump; convey the cement powder to the solidification barrel already containing the radioactive waste to be solidified through the cement powder feeding hopper, screw conveyor, and powder metering device; connect the mixing head to the solidification barrel The disposable stirring paddles inside mesh, start the stirring head, mix the radioactive waste and cement powder in the curing barrel evenly and stop stirring, remove the stirring paddle on the stirring head, and transport the curing barrel to the preset location for maintenance; If the radioactive waste in the solidification barrel needs to be added with chemicals, the chemicals in the medicine tank are pumped into the solidification barrel by the drug delivery pump before stirring, and then the stirring procedure is performed; after the mixture in the solidification barrel is solidified, the solidification The bucket is repositioned under the line holder plate for cap grouting. The prepared slurry is injected into the upper part of the solidified mixture in the solidification barrel through the slurry tank, the slurry delivery pump and the slurry metering device to form a cap of the cement barrel, which is more conducive to preventing the spread of radioactive substances in the barrel. When a batch of waste treatment is completed, the equipment and pipes of the system are flushed with process water to avoid clogging the system.

The embodiment of the present invention is especially suitable for cement solidification of small batches of radioactive waste, and the radioactive waste is formed into a cement solidified body, which is convenient for the transportation, temporary storage and final disposal of the radioactive waste. The waste solidification system of the embodiment of the present invention has a simple structure, can be fixedly installed, or can be formed as a mobile device, and is easy to operate.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments may be referred to each other.

In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", The orientations or positional relationships indicated by "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, It is only for the convenience of describing the present invention and simplifying the description, not to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "arrangement" and "connection" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium. The fixed connection can be common technical solutions such as welding, screw connection and tightening. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or replacements, which should cover within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. A waste solidification system, comprising:

the curing device is internally provided with a stirring device;

a waste transport device, an output port of the waste transport device being connected to an input port of the solidification device for transporting waste to the solidification device;

the output port of the first feeding device is connected with the input port of the curing device and is used for conveying the powdery cementing material to the curing device;

and the output port of the second feeding device is connected with the input port of the curing device, and the second feeding device is used for conveying the pasty cementing material to the curing device.

2. A waste solidifying system as claimed in claim 1, wherein the output of the waste transport device is connected to the first input of the solidifying device;

the output port of the first feeding device is connected with the second input port of the curing device;

and the output port of the second feeding device is connected with the third input port of the curing device.

3. A waste solidifying system as claimed in claim 2 wherein the first inlet, the second inlet and the third inlet are provided at different locations at the top end of the solidifying means.

4. The waste solidification system of claim 1 further comprising:

and the output port of the drug delivery device is connected with the input port of the curing device and is used for delivering the drugs to the curing device.

5. A waste immobilisation system as claimed in claim 1, wherein the waste transport device comprises a waste storage tank and a waste transport pump, an output of the waste storage tank being connected to an input of the waste transport pump, an output of the waste transport pump being connected to an input of the immobilisation device.

6. The waste solidifying system of claim 1 wherein the stirring device comprises a stirring head and a stirring paddle, the stirring head and the stirring paddle being removably connected.

7. The waste solidifying system of claim 1 wherein the first feeding device comprises a hopper and a conveyor, the hopper having an output connected to the conveyor input, the conveyor output connected to the solidifying device input;

and/or

The second feeding device comprises a slurry tank and a slurry delivery pump, an output port of the slurry tank is connected with an input port of the slurry delivery pump, and an output port of the slurry delivery pump is connected with an input port of the curing device.

8. The waste curing system of claim 4, wherein said drug delivery device includes a drug canister and a drug delivery pump, an output port of said drug canister being connected to an input port of said drug delivery pump, an output port of said drug delivery pump being connected to an input port of said curing device.

9. The waste curing system of claim 1, wherein the curing device is a curing barrel having an end cap disposed on the top thereof, and the cementitious material is cement.

10. A waste solidifying method applied to the waste solidifying system of any one of claims 1 to 9, wherein the method comprises:

conveying waste from the waste conveyor to the solidification unit, the waste comprising one or more of radioactive waste water, sludge, raffinate and waste resin;

conveying the powdered cementitious material from the first feeding device to the curing device;

stirring the mixture in the curing device by adopting a stirring device;

placing the curing device for a preset time period to harden the mixture in the curing device;

and conveying the pasty cementing material from the second feeding device to the curing device so as to cover the hardened mixture with the pasty cementing material.

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