Device suitable for heating pulse extraction column plate section

Abstract

The utility model belongs to the technical field of equipment heating, and particularly relates to a device suitable for pulse extraction column plate section heating. The device comprises a plurality of heating pipelines arranged in parallel; the heating pipeline is arranged around the plate section of the 2BX column and is parallel to the plate section; a preset distance is formed between the heating pipeline and the outer wall of the plate section; and hot water with a preset temperature is introduced into the heating pipeline. Heat transfer is used in a heating mode, water is used as a medium, cost is low, recycling can be achieved, damage is not prone to occurring, maintenance is avoided, radiation injury to personnel is greatly reduced, and the problem that the temperature of 2BX pulse column plate section feed liquid of a spent fuel reprocessing plant cannot meet the design requirement is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of device heating, and particularly relates to a device suitable for heating of a pulse extraction column plate section. BACKGROUND

[0002] The role of part of extraction equipment in a post-treatment process system is to separate the required substances from the organic phase into the aqueous phase through the back extraction of two-phase materials in the equipment, such as the 1C column in the co-decontamination separation process and the 2BX column in the plutonium purification system, which are all used to make uranium and plutonium enter the aqueous phase from the organic phase through back extraction. The back extraction effect is an endothermic reaction, so appropriately increasing the temperature of the equipment or the material liquid can make the back extraction effect better, and therefore, heating the extraction equipment or the material liquid can make it play a better role.

[0003] Currently, the 1C column and 2BX column equipment in the post-treatment plant are all heated by heating the material liquid, the aqueous phase reagent is heated by passing into 0.3 MPa steam through a high tank, and the organic phase material is heated by jacket heating to heat the material, so as to control the temperature of the material in the extraction equipment to a certain temperature. It is found in the debugging stage of the spent fuel post-treatment plant 2BX column that the temperature of the pulse column plate section surface cannot reach about 45 DEG C designed only by heating the two-phase material, and the design requirement cannot be met by continuously heating the high tank reagent temperature. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a device suitable for heating of a pulse extraction column plate section, and solve the problem of difficult heating of pipelines or equipment in a post-treatment plant with high radioactivity in the prior art.

[0005] The technical scheme for achieving the purpose of the application is as follows:

[0006] The application provides a device suitable for heating of a pulse extraction column plate section, and the device comprises a plurality of parallel arranged heating pipelines.

[0007] The heating pipelines are arranged around the plate section of the 2BX column and are parallel to the plate section, and the heating pipelines are spaced apart from the outer wall of the plate section by a preset distance.

[0008] Hot water of a preset temperature is passed through the heating pipelines.

[0009] Optionally, the heating pipelines are ten, and are evenly arranged around the plate section.

[0010] Optionally, the heating pipelines are spaced apart from the outer wall of the plate section by 5 mm.

[0011] Optionally, the preset temperature is 85 DEG C.

[0012] Optionally, the outer wall of the plate section is provided with a circular ring for fixing the heating pipelines at a preset distance.

[0013] Optionally, the plate segment is installed with a steel support welded on the steel covering wall of the equipment chamber for fixing the heating pipeline.

[0014] Optionally, a circle of pipeline dry pipe is arranged on the top and bottom of the plate segment, and connected with the plurality of parallel arranged heating pipelines.

[0015] Optionally, the heating pipeline is connected with a pneumatic valve and a bellows stop valve in series.

[0016] The beneficial technical effects of the present application are:

[0017] The device for heating the plate segment of the pulse extraction column provided by the embodiment of the present application comprises a plurality of parallel arranged heating pipelines 1. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The device for heating the plate segment of the pulse extraction column provided by the embodiment of the present application comprises a plurality of parallel arranged heating pipelines 1.

[0019] Figure 2 The device for heating the plate segment of the pulse extraction column provided by the embodiment of the present application comprises a plurality of parallel arranged heating pipelines 1.

[0020] In the figure:

[0021] 1-heating pipeline; 2-plate segment; 3-circle; 4-pipeline dry pipe. DETAILED DESCRIPTION

[0022] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments described in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] Referring to Figure 1 The figure is a structure schematic diagram of the device for heating the plate segment of the pulse extraction column provided by the embodiment of the present application.

[0024] The device for heating the plate segment of the pulse extraction column provided by the embodiment of the present application comprises a plurality of parallel arranged heating pipelines 1.

[0025] The heating pipeline 1 is arranged around the plate segment 2 of the 2BX column and is parallel to the plate segment 2; the heating pipeline 1 is spaced apart from the outer wall of the plate segment 2 by a preset distance;

[0026] Hot water of a preset temperature is passed through the heating pipeline 1.

[0027] To solve the problems in the prior art, the inventors of the present application have found, through research, that the 2BX column mainly has a long plate segment, and the heat dissipation amount is too large; the temperature of the plate segment of the 2BX column cannot be controlled by heating the feed liquid alone; therefore, the device of the present application arranges multiple heating pipelines 1 that are arranged in parallel around the equipment according to the size of the pipeline diameter that needs to be heated and the size of the diameter of the equipment, and the heating pipelines 1 are as close to the wall of the equipment as possible.

[0028] The heating pipeline 1 that is arranged around the 2BX column is regarded as a water reflection layer that wraps the 2BX column and has a uniform thickness; the 2BX column and the hot water heating pipeline are modeled and analyzed according to the structure of the 2BX column and the hot water heating pipeline; the MCNP5 software program is used; the amount of substance and the distribution of each different component of the feed liquid and the concentration of each different radioactive substance in the feed liquid are brought into the 2BX column by the Monte Carlo method; the 2BX column and the heating pipeline are re-calculated and analyzed for criticality; the critical value is 0.6 after the original 2BX column is increased by 30 cm of the water reflection layer; in order to consider the influence of the fluctuation of the U and Pu concentrations on the 2BX column during system operation, the U and Pu concentrations of the feed liquid are enlarged from the normal concentration to the upper limit of the system operation; the 30 cm of the water reflection layer that is originally increased is removed, and a DN15 hot water pipeline is used for calculation; the final calculation result is 0.043, which still satisfies the critical safety of the equipment and is subcritical safety.

[0029] In one example, the heating pipeline 1 has ten pipelines, which are evenly arranged around the plate segment 2.

[0030] In another example, the heating pipeline 1 is spaced apart from the outer wall of the plate segment 2 by 5 mm.

[0031] As an example, the preset temperature is 85°C.

[0032] In some possible implementation manners of the embodiments of the present application, as shown in Figure 2 A circular ring 3 for fixing the heating pipeline 1 is arranged on the outer wall of the plate segment 2 at a preset distance.

[0033] In one example, a steel support is welded to the steel cladding wall of the equipment room, and is used for fixing the heating pipeline 1.

[0034] In some possible implementation manners of the embodiments of the present application, as shown in Figure 2 A pipeline dry pipe 4 is arranged on the top and the bottom of the plate segment 2, and is connected to the multiple heating pipelines 1 that are arranged in parallel.

[0035] The heating pipeline 1 is connected to the pipeline main pipe 4 to form a hot water backflow replacement, hot water at about 85°C is introduced into the heating pipeline 1 to flow continuously and perform heat transfer, so that the surface temperature of the plate section 2 can reach up to 60°C, and the heated water is returned to the hot water receiving tank to continue heating the hot water and recycle.

[0036] In one example, the heating pipeline 1 is connected in series with a pneumatic valve and a bellows stop valve.

[0037] The pipeline main pipe 4 is led out of the equipment room, and a pneumatic valve and seven bellows stop valves are added to the heating pipeline 1, the pneumatic valve is connected to the air source box, and a signal is led to the central control room, and personnel remotely control the switch, when heating is needed, only the hand valve needs to be opened on site, and the main control remotely controls the heating switch and stop.

[0038] In specific implementation, the hot water valve on the upstream can be closed to empty the hot water in the heating pipeline 1 and to empty the liquid in the pulse extraction column; 10 heating pipelines 1 are arranged around the extraction column and are flush with the height of the plate section, and each of the upper and lower pipelines is connected to one pipeline main pipe 4; the 10 heating pipelines 1 are tightly attached to the wall of the plate section of the extraction column, and are fastened and spot-welded by stainless steel clamps (i.e., the circular ring 3). After installation is completed, the pulse column is filled, the water and backwater pipeline related valves on the heating pipeline 1 are opened, and the pulse column is heated. According to the temperature requirement of the liquid in the plate section of the pulse column, the valve opening of the heating pipeline 1 is properly adjusted, so that the temperature is stably maintained within the design requirement range.

[0039] Under the system operation condition, the temperature has a significant effect on the reduction stripping of plutonium by hydroxylamine, and when the temperature is increased from 35°C to 55°C by the device, the stripping rate of plutonium is increased by 30%. Although increasing the temperature is beneficial to increasing the stripping rate of plutonium, too high temperature will accelerate the decomposition of TBP and is not conducive to the stability of the solvent, therefore, the temperature of the reduction stripping section of plutonium is controlled at 45-50°C.

[0040] The heating mode of the device uses heat transfer, the medium is water, the cost is low, and the water can be recycled. The problem that the temperature of the liquid in the plate section of the 2BX pulse column in the spent fuel reprocessing plant cannot reach the design requirement is solved. The use of the device not only has a heating effect, but also is not easy to damage, is maintenance-free, and greatly reduces the radiation damage to personnel. The heating device has good heat transfer effect, stable heat transfer and fast speed, can be remotely controlled, greatly shortens the time, and improves the work efficiency.

[0041] The application has been described in detail above in combination with the drawings and examples, but the application is not limited to the above examples, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application. The contents not described in detail in the application can adopt the existing technology.

Claims

1. A device suitable for the heating of a pulse extraction column plate segment, characterized in that, The device comprises a plurality of parallel heating pipelines (1); The heating pipelines (1) are arranged around the plate section (2) of the 2BX column and are parallel to the plate section (2); the heating pipelines (1) are spaced apart from the outer wall of the plate section (2) by a preset distance; Hot water of a preset temperature is circulated in the heating pipelines (1).

2. The apparatus suitable for pulsed extraction column plate segment heating according to claim 1, characterized in that, The heating pipelines (1) are ten in number and are evenly arranged around the plate section (2).

3. The apparatus suitable for pulsed extraction column plate segment heating according to claim 1, characterized in that, The heating pipelines (1) are spaced apart from the outer wall of the plate section (2) by 5 mm.

4. The apparatus suitable for pulsed extraction column plate segment heating according to claim 1, characterized in that, The preset temperature is 85℃.

5. The apparatus suitable for pulsed extraction column plate segment heating according to any one of claims 1 to 4, characterized in that, The outer wall of the plate section (2) is provided with a circular ring (3) for fixing the heating pipelines (1) at a preset distance.

6. The apparatus suitable for pulsed extraction column plate segment heating according to any one of claims 1 to 4, characterized in that, The plate section (2) is provided with a steel support welded to the steel cladding wall of the equipment room for fixing the heating pipelines (1).

7. The apparatus suitable for pulsed extraction column plate segment heating according to any one of claims 1 to 4, characterized in that, The plate section (2) is provided with a ring of pipeline dry pipes (4) at the top and the bottom for connecting the plurality of parallel heating pipelines (1).

8. The apparatus suitable for pulsed extraction column plate segment heating according to claim 7, characterized in that, The heating pipelines (1) are connected in series with pneumatic valves and bellows stop valves.

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