High-temperature incineration curing device for radioactive waste resin of nuclear power plant

Abstract

The utility model discloses a high-temperature incineration and solidification device for radioactive waste resin of a nuclear power plant. The high-temperature incineration and solidification device comprises a preheating bin, an incinerator, an ignition furnace, a filter bin unit, a flue and a heat exchange sleeve. A heat exchange layer is arranged on the outer side of the preheating bin, and the heat exchange sleeve is connected with the heat exchange layer through a connecting pipe so as to convey a cooling medium absorbing smoke heat in the heat exchange sleeve into the heat exchange layer. According to the high-temperature incineration and solidification device for the radioactive waste resin of the nuclear power plant, through cooperation of the preheating bin, the incinerator, the ignition furnace and the filter bin unit, incineration and solidification treatment on the radioactive waste resin are achieved, and meanwhile through arrangement of the heat exchange sleeve on the flue and connection with the preheating bin, the heat exchange sleeve can be recycled. The heat of the flue gas is recycled while the flue gas is cooled, energy consumption is reduced, and the incineration curing cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of radioactive waste resin treatment technology, and in particular to a high-temperature incineration and curing device for radioactive waste resin from nuclear power plants. Background Technology

[0002] Currently, plasma technology has been widely applied in fields such as machinery, metallurgy, and materials. Its application in waste treatment is a relatively new process that has developed over the past two decades. Organic matter is pyrolyzed into combustible small molecules, while inorganic matter is melted at high temperatures to form a glassy residue. This plasma technology features rapid reaction, minimal secondary pollution, and wide applicability. It overcomes the shortcomings of traditional treatment technologies such as incineration and chemical treatment, which suffer from significant secondary pollution, complex processes, and selective application to waste. It is particularly suitable for the environmental treatment of hazardous wastes such as waste resin, asbestos, and incineration fly ash.

[0003] For the treatment of waste, incineration solidification technology can achieve high temperatures above 1500℃, without producing dioxins, and is a more thorough treatment. However, existing high-temperature incineration solidification devices for radioactive waste resins require cooling of the flue gas. After cooling, the heat from the flue gas cannot be utilized, leading to energy consumption and increased incineration solidification costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an improved high-temperature incineration and curing device for radioactive waste resin from nuclear power plants.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to provide a high-temperature incineration and curing device for radioactive waste resin in nuclear power plants, including a preheating chamber for preheating radioactive waste resin, an incinerator for incinerating and curing the preheated radioactive waste resin, an ignition furnace for receiving combustible gas from the incinerator and igniting it to generate flue gas, a filter chamber unit for cooling and filtering the flue gas, a flue connecting the ignition furnace and the filter chamber unit, and a heat exchange jacket disposed on the outer periphery of the flue.

[0006] The preheating chamber is provided with a heat exchange layer on its outer side. The heat exchange sleeve is connected to the heat exchange layer through a connecting pipe to transport the cooling medium that has absorbed the heat of the flue gas in the heat exchange sleeve to the heat exchange layer.

[0007] In one embodiment, the heat exchange layer is a heat exchange box, and the preheating chamber is housed within the heat exchange box.

[0008] In one embodiment, the heat exchange layer is a heat exchange interlayer disposed on the outer periphery of the preheating chamber.

[0009] In one embodiment, the filter chamber unit includes a cooling filter chamber, an adsorption filter chamber, and a filter pipe connecting the cooling filter chamber and the adsorption filter chamber; the cooling filter chamber is connected to the ignition furnace through the flue.

[0010] In one embodiment, the flue is connected between the top of the ignition furnace and the top of the cooling filter chamber.

[0011] In one embodiment, the high-temperature incineration and curing device for radioactive waste resin from a nuclear power plant further includes a combustible gas pipeline;

[0012] The combustible gas pipeline connects the incinerator and the ignition furnace, and the combustible gas generated in the incinerator enters the ignition furnace through the combustible gas pipeline.

[0013] In one embodiment, the combustible gas pipeline is connected between the top of the incinerator and the top or upper end of the ignition furnace.

[0014] In one embodiment, the heat exchange jacket is provided with a medium inlet and a medium outlet; the cooling medium enters the heat exchange jacket through the medium inlet; the medium outlet is connected to the connecting pipe, and the cooling medium in the heat exchange jacket that has absorbed heat from the flue gas enters the connecting pipe through the medium outlet.

[0015] In one embodiment, the preheating chamber is equipped with an electric heating element for auxiliary heating.

[0016] The beneficial effects of this utility model are as follows: by coordinating the preheating chamber, incinerator, ignition furnace and filter chamber units, the radioactive waste resin can be incinerated and solidified. At the same time, by setting up a heat exchange jacket on the flue and connecting it with the preheating chamber, the heat of the flue gas can be recovered and utilized while cooling the flue gas, thereby reducing energy consumption and reducing the cost of incineration and solidification. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a high-temperature incineration and curing device for radioactive waste resin in a nuclear power plant, according to an embodiment of this utility model. Detailed Implementation

[0019] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] like Figure 1 As shown, an embodiment of the present invention provides a high-temperature incineration and curing device for radioactive waste resin in nuclear power plants, comprising a preheating chamber 10, an incinerator 20, an ignition furnace 30, and a filtration chamber unit.

[0021] The preheating chamber 10 is used to preheat the radioactive waste resin, the incinerator 20 is used to incinerate and solidify the preheated radioactive waste resin, the ignition furnace 30 receives combustible gas from the incinerator 20, ignites the combustible gas and generates flue gas, and the filtration chamber unit receives the flue gas discharged from the ignition furnace 30 and cools and filters the flue gas.

[0022] The filter chamber unit is connected to the ignition furnace 30 via a flue 40. The flue gas generated in the ignition furnace 30 enters the flue 40 and flows along it into the filter chamber unit. To cool the flue gas and recover its heat, a heat exchange jacket 50 is installed around the outer periphery of the flue 40. A cooling medium is circulated through the heat exchange jacket 50, and the cooling medium is heated after heat exchange with the flue gas in the flue 40. The heated cooling medium can then be transported to other locations for heat recovery and reuse.

[0023] like Figure 1 As shown in the figure, in this utility model, a heat exchange layer 11 is provided on the outside of the preheating chamber 10, and the heat exchange sleeve 50 is connected to the heat exchange layer 11 through the connecting pipe 53, so as to transport the cooling medium after absorbing the heat of flue gas in the heat exchange sleeve 50 to the heat exchange layer 11, to heat the radioactive waste resin in the preheating chamber 10, and realize the recovery and use of the heat of flue gas.

[0024] Specifically, the heat exchange jacket 50 is provided with a medium inlet 51 and a medium outlet 52 that connect the interior of the heat exchange jacket 50. The medium inlet 51 is used to introduce a cooling medium (e.g., cooling water), which exchanges heat with the flue gas inside the heat exchange jacket 50 and then exits from the medium outlet 52. The medium outlet 52 is connected to a connecting pipe 53, which connects to the heat exchange layer 11. The cooling medium, after absorbing heat from the flue gas inside the heat exchange jacket 50, enters the connecting pipe 53 through the medium outlet 52 and then enters the heat exchange layer 11 along the connecting pipe 53.

[0025] The flue 40 is located between the ignition furnace 30 and the filter chamber unit, preferably connecting the top of the ignition furnace 30 and the top of the filter chamber unit. The heat exchange jacket 50 on the flue 40 has its medium inlet 51 preferably located on the downward-facing side wall of one end of the heat exchange jacket 50, and its medium outlet 52 preferably located on the upward-facing side wall of the opposite end of the heat exchange jacket 50, achieving a bottom-in, top-out flow of the cooling medium and enabling sufficient heat exchange with the flue gas within the flue 40.

[0026] The heat exchange layer 11 serves as the heating structure of the preheating chamber 10. It can utilize the heat of flue gas to heat the radioactive waste resin to achieve preheating, thereby reducing the energy consumption of incineration solidification and lowering costs.

[0027] Alternatively, the heat exchange layer 11 can be a heat exchange box, with the preheating chamber 10 housed inside. Or, the heat exchange layer 11 can be a heat exchange jacket disposed on the outer periphery of the preheating chamber 10.

[0028] In addition, electric heating elements or the like can be installed on the preheating chamber 10 as auxiliary heating. Auxiliary heating can be activated when the heating effect of the heat exchange layer 11 on the preheating chamber 10 is insufficient.

[0029] Furthermore, the preheating chamber 10 can be connected to one side of the incinerator 20, and the preheated radioactive waste resin enters the incinerator 20 through the interface between the two. Alternatively, the preheating chamber 10 can be connected to the incinerator 20 via a conveyor such as a track, and the preheated radioactive waste resin enters the incinerator 20 via the conveyor.

[0030] The incinerator 20 is connected to the ignition furnace 30 via a combustible gas pipeline 21. The combustible gas generated in the incinerator 20 enters the ignition furnace 30 through the combustible gas pipeline 21 and is burned in the ignition furnace 30 to produce flue gas.

[0031] Preferably, the combustible gas pipeline 21 is connected between the top of the incinerator 20 and the top or upper end of the ignition furnace 30.

[0032] The filter chamber unit further includes a cooling filter chamber 60, an adsorption filter chamber 70, and a filter pipe 80 connecting the cooling filter chamber 60 and the adsorption filter chamber 70; the cooling filter chamber 60 is connected to the combustion furnace 30 through a flue 40.

[0033] The flue gas generated in the ignition furnace 30 enters the cooling filter chamber 60 through the flue 40. The flue gas is cooled inside the cooling filter chamber 60, and at the same time, the cooling filter chamber 60 filters the dust in the flue gas. The cooled and filtered flue gas enters the adsorption filter chamber 70 through the filter pipe 80. The adsorption filter chamber 70 adsorbs and filters dioxins and volatile radionuclides in the flue gas. The adsorbed and filtered flue gas is then discharged from the exhaust pipe.

[0034] refer to Figure 1 The steps of the high-temperature incineration and curing device for radioactive waste resin in nuclear power plants according to this utility model for high-temperature incineration and curing treatment of radioactive waste resin are as follows:

[0035] (1) Beforehand, a small amount of non-combustible material in the radioactive waste resin is sorted out, and the large pieces of radioactive waste resin are crushed. At least one of the following methods is selected for sorting non-combustible material: magnetic separation, picking, air separation, and water separation.

[0036] (2) Mix the radioactive waste resin with the curing agent and then preheat it in the preheating chamber 10. It can be understood that the radioactive waste resin can be added to the preheating chamber 10 together with the curing agent and then mixed in the preheating chamber 10, or the radioactive waste resin can be mixed with the curing agent first and then placed into the preheating chamber 10.

[0037] Radioactive waste resin is mixed with curing agent to form a mixture.

[0038] (3) The preheated mixture is sent into the incinerator 20 for high-temperature incineration and solidification treatment to generate combustible gas and slag.

[0039] During combustion, the organic components in the radioactive waste resin decompose, generating combustible gases; the inorganic components and radionuclides in the radioactive waste resin, together with the curing agent, form slag.

[0040] The molten slag can be discharged through the discharge port at the bottom of the incinerator 20 and enter the ash cylinder for cooling and condensation for centralized treatment, while the combustible gas is transported to the ignition furnace 30.

[0041] (4) The combustible gas is fully mixed with air in the ignition furnace 30 and then ignited to produce flue gas. The flue gas enters the cooling and filtering chamber 60 through the flue 40.

[0042] Meanwhile, as the flue gas flows through the flue 40, it exchanges heat with the cooling medium of the heat exchange jacket 50 on the outer periphery. After the heat exchange, the cooling medium is heated and transported to the heat exchange layer 11, while the flue gas is cooled down after the heat exchange and enters the cooling filter chamber 60.

[0043] (5) The flue gas passes through the cooling filter chamber 60 and the adsorption filter chamber 70 in sequence to remove dust, dioxins and volatile radionuclides from the flue gas.

[0044] The dust filtered and deposited in the cooling filter chamber 60 and the dioxins and radionuclides adsorbed in the adsorption filter chamber 70 can be collected and placed in a solid cylinder for compression to form a solid.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-temperature incineration and curing device for radioactive waste resin from nuclear power plants, characterized in that, It includes a preheating chamber for preheating radioactive waste resin, an incinerator for incinerating and solidifying the preheated radioactive waste resin, an ignition furnace for receiving combustible gas from the incinerator and igniting it to generate flue gas, a filter chamber unit for cooling and filtering the flue gas, a flue connecting the ignition furnace and the filter chamber unit, and a heat exchange jacket disposed on the outer periphery of the flue. The preheating chamber is provided with a heat exchange layer on its outer side. The heat exchange sleeve is connected to the heat exchange layer through a connecting pipe to transport the cooling medium that has absorbed the heat of the flue gas in the heat exchange sleeve to the heat exchange layer.

2. The high-temperature incineration and curing device for radioactive waste resin from nuclear power plants according to claim 1, characterized in that, The heat exchange layer is a heat exchange box, and the preheating chamber is housed within the heat exchange box.

3. The high-temperature incineration and curing device for radioactive waste resin from nuclear power plants according to claim 1, characterized in that, The heat exchange layer is a heat exchange interlayer disposed on the outer periphery of the preheating chamber.

4. The high-temperature incineration and curing device for radioactive waste resin from nuclear power plants according to claim 1, characterized in that, The filter chamber unit includes a cooling filter chamber, an adsorption filter chamber, and a filter pipe connecting the cooling filter chamber and the adsorption filter chamber; the cooling filter chamber is connected to the ignition furnace through the flue.

5. The high-temperature incineration and curing device for radioactive waste resin from nuclear power plants according to claim 4, characterized in that, The flue connects the top of the ignition furnace and the cooling filter chamber.

6. The high-temperature incineration and curing device for radioactive waste resin from nuclear power plants according to claim 1, characterized in that, The high-temperature incineration and curing device for radioactive waste resin in nuclear power plants also includes a combustible gas pipeline. The combustible gas pipeline connects the incinerator and the ignition furnace, and the combustible gas generated in the incinerator enters the ignition furnace through the combustible gas pipeline.

7. The high-temperature incineration and curing device for radioactive waste resin from nuclear power plants according to claim 6, characterized in that, The combustible gas pipeline is connected between the top of the incinerator and the top or upper end of the ignition furnace.

8. The high-temperature incineration and curing apparatus for radioactive waste resin from nuclear power plants according to any one of claims 1-7, characterized in that, The heat exchange jacket is provided with a medium inlet and a medium outlet; the cooling medium enters the heat exchange jacket through the medium inlet; the medium outlet is connected to the connecting pipe, and the cooling medium in the heat exchange jacket that has absorbed the heat of the flue gas enters the connecting pipe through the medium outlet.

9. The high-temperature incineration and curing apparatus for radioactive waste resin from nuclear power plants according to any one of claims 1-7, characterized in that, The preheating chamber is equipped with an electric heating element for auxiliary heating.

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