Air draft pipeline system for rare earth production

Abstract

The utility model relates to an air draft pipeline system for rare earth production, which comprises an air draft header pipe arranged above a rare earth production line, an air draft opening is arranged on a reaction kettle, the air draft opening is connected to the air draft header pipe through an air draft branch pipe, and the top end of the air draft branch pipe is communicated with the air draft header pipe through a branch pipe connecting branch pipe. The bottom end of the air draft branch pipe is connected to an air draft opening of each reaction kettle; a section of anti-backflow bent pipe is arranged in the middle of the air draft branch pipe; the branch pipe connecting branch pipe is arranged on the air draft header pipe, the branch pipe connecting branch pipe comprises a pipe body, symmetrical liquid containing bottom grooves are formed in the bottoms of the left end and the right end of the pipe body, emptying openings are formed in the lowest ends of the liquid containing bottom grooves, and two flow baffles which are arranged in a bilateral symmetry mode are arranged in the pipe body; a backflow preventer is arranged between every two adjacent branch pipe connecting branch pipes, and the backflow preventer is arranged on the air draft header pipe. According to the utility model, condensate is prevented from flowing back to each reaction kettle in all directions, and the condensate is prevented from being mixed to pollute product raw materials or materials, so that the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rare earth production technical field especially relates to a kind of for rare earth production's air draft pipeline system. BACKGROUND

[0002] Rare earth needs to be carried out acid solution (raw material is added hydrochloric acid into dissolution), extraction (single element is obtained by purification), precipitation (add oxalic acid, and generate precipitate) and calcination in production, and calcination is to burn off oxalic acid, and obtain oxide of rare earth, and the production of rare earth is that raw ore is formed into base raw material by crushing, preliminary refining step, and then the base raw material is formed into oxide of rare earth by above steps, and the calcination part is burned by high temperature, so that oxalic acid ion combines with rare earth ion, to form oxide of rare earth, to complete production.

[0003] In the process of acid solution, extraction and precipitation, different gases are generated due to chemical reaction, and an air draft system needs to be set to draft and exhaust, and different reaction vessels at different stations share an air draft main pipe in rare earth production system, and different gases generated by different reactions are condensed and backflow in the air draft main pipe, which is easy to backflow into other reaction vessels, causing mixed pollution of different solutions, and long-term accumulation affects product quality. SUMMARY

[0004] The utility model discloses a kind of for rare earth production's air draft pipeline system, prevent mixed pollution of the reaction vessel of different station by being provided with anti-backflow device in air draft pipeline, improve product quality.

[0005] The utility model discloses a kind of for rare earth production's air draft pipeline system, prevent mixed pollution of the reaction vessel of different station by being provided with anti-backflow device in air draft pipeline, improve product quality.

[0006] An air draft pipeline system for rare earth production, comprising an air draft main pipe arranged above an acid dissolution section, an extraction section and a precipitation section of a rare earth production line, the acid dissolution section is provided with a plurality of oxalic acid heat preservation tanks and oxalic acid dissolution tanks, the extraction section is provided with a plurality of organic solvent reaction tanks, and the precipitation section is provided with a plurality of suction filters.

[0007] The top end of the air draft branch pipe is communicated with the air draft main pipe through a branch pipe connection sub-pipe, and the bottom end of the air draft branch pipe is connected to the air draft ports of the reaction tanks.

[0008] The branch pipe connecting branch pipe is arranged on the air extraction main pipe, and comprises a pipe body, the left and right ends of the pipe body are communicated with the air extraction main pipe, and the front of the pipe body is provided with a through hole communicated with the air extraction branch pipe; the bottom of the left and right ends of the pipe body is provided with symmetrical liquid containing bottom grooves, the lowest end of the liquid containing bottom groove is provided with a discharge port, and the discharge port is provided with an openable bottom cover; two left and right symmetrical flow baffles are arranged in the pipe body, the top end of the flow baffle at the left end of the pipe body is fixed to the upper left corner of the pipe body, and the flow baffle is arranged in an inclined manner; a backflow preventer is arranged between the two adjacent branch pipe connecting branch pipes.

[0009] Further, the backflow prevention elbow comprises an upper inclined section, a vertical section and a lower inclined section connected in sequence, and the upper inclined section and the lower inclined section are inclined downward in the same direction.

[0010] Further, the inclination angles of the upper inclined section and the lower inclined section are 5°-30°.

[0011] Further, one end of the upper inclined section is connected with the upper part of the air extraction branch pipe in a smooth manner, and the other end is connected with the vertical section in a smooth manner.

[0012] Further, the other end of the lower inclined section is connected with the lower part of the air extraction branch pipe in a smooth manner.

[0013] Further, the cross section of the liquid containing bottom groove is V-shaped.

[0014] Further, the included angle between the flow baffle at the left end of the pipe body and the left wall of the pipe body is greater than 40°.

[0015] Further, the bottom end of the flow baffle is water drop-shaped, so that the condensed water is blocked and guided to drop into the liquid containing bottom groove.

[0016] Further, the bottom end of the flow baffle is higher than the top end of the air extraction branch pipe.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] The present application provides an air extraction pipeline system for rare earth production, two backflow prevention elbows with inclined sections are arranged on each air extraction branch pipe, each air extraction branch pipe is communicated to the air extraction main pipe through a branch pipe connecting branch pipe, and a backflow preventer is arranged between the two adjacent branch pipe connecting branch pipes, so that the condensed liquid is prevented from flowing back to each reaction kettle in all directions, the condensed liquid is prevented from mixing and contaminating the product raw materials or materials, and the product quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The figure is a structural schematic diagram of the present application.

[0020] Figure 2The structure diagram of the branch pipe connection sub-pipe of the utility model is shown.

[0021] Among them:

[0022] Oxalic acid heat preservation tank 1, oxalic acid dissolving kettle 2, organic solvent reaction kettle 3, suction filter box 4, suction main pipe 5, suction branch pipe 6, anti-backflow elbow 61, upper inclined section 611, vertical section 612, lower inclined section 613, branch pipe connection sub-pipe 7, pipe body 71, liquid containing bottom groove 72, bottom cover 73, flow baffle 74, backflow preventer 8. DETAILED DESCRIPTION

[0023] In order to better understand the technical scheme of the utility model, the following will be combined with relevant drawings to make detailed description. It should be understood that the following specific examples are not used to limit the specific implementation of the technical scheme of the utility model, and they are only implementation of the technical scheme of the utility model. It should be pointed out that the description of the position relationship of each component in this paper, such as A component is located above B component, is based on the description of the relative position of each component in the drawing, and is not used to limit the actual position relationship of each component. Example 1

[0024] Referring to Figures 1-2 , Figure 1 The structure diagram of the utility model is drawn. As shown in the figure, the utility model relates to a suction pipe system for rare earth production, which comprises a suction main pipe 5 arranged above the acid dissolution section, extraction section and precipitation section of the rare earth production line, the acid dissolution section is provided with a plurality of oxalic acid heat preservation tanks 1 and oxalic acid dissolving kettles 2, the extraction section is provided with a plurality of organic solvent reaction kettles 3, the precipitation section is provided with a plurality of suction filter boxes 4, the oxalic acid heat preservation tanks 1, oxalic acid dissolving kettles 2 and organic solvent reaction kettles 3 are arranged in sequence, the suction filter boxes 4 are arranged on the front side of the organic solvent reaction kettles 3, and one organic solvent reaction kettle 3 corresponds to 2 to 3 suction filter boxes 4.

[0025] The oxalic acid heat preservation tank 1, oxalic acid dissolving kettle 2 and organic solvent reaction kettle 3 are respectively provided with suction ports, the suction ports are connected to the suction main pipe 5 through the suction branch pipe 6 and communicate with the suction main pipe 5.

[0026] The top end of the suction branch pipe 6 communicates with the suction main pipe 5 through the branch pipe connection sub-pipe 7, and the bottom end of the suction branch pipe 6 is connected to the suction port of each reaction kettle; the middle part of the suction branch pipe 6 is provided with an anti-backflow elbow 61, the anti-backflow elbow 61 comprises an upper inclined section 611, a vertical section 612 and a lower inclined section 613 connected in sequence, the upper inclined section 611 and the lower inclined section 613 are inclined downward in the same direction, and the inclination angle is 5°~30°;

[0027] One end of the upper inclined section 611 is connected to the upper part of the air extraction branch pipe 6 in a smooth manner, and the other end is connected to the vertical section 612 in a smooth manner.

[0028] The branch pipe connecting sub-pipe 7 is arranged on the air extraction main pipe 5, and the branch pipe connecting sub-pipe 7 comprises a pipe body 71, the left and right ends of the pipe body 71 are communicated with the air extraction main pipe 5, and the front of the pipe body 71 is provided with a through hole communicated with the air extraction branch pipe 6;

[0029] The bottom of the left and right ends of the pipe body 71 is provided with symmetrical liquid containing bottom grooves 72, the cross section of the liquid containing bottom groove 72 is V-shaped, the lowest end of the liquid containing bottom groove 72 is provided with a drain opening, the drain opening is provided with an openable bottom cover 73, and the drain opening is used for draining the long-term accumulated condensed liquid;

[0030] Two left and right symmetrical flow baffles 74 are arranged in the pipe body 71, the top end of the flow baffle 74 at the left end of the pipe body 71 is fixed to the upper left corner of the pipe body 71, and an included angle greater than 40° is arranged between the flow baffle 74 and the left wall of the pipe body 71, that is, the flow baffle 74 is arranged in an inclined manner;

[0031] The bottom end of the flow baffle 74 is water drop-shaped, which is convenient for blocking the condensed water and guiding the condensed water to drop into the liquid containing bottom groove 72; and the bottom end of the flow baffle 74 is higher than the top end of the air extraction branch pipe 6.

[0032] A backflow preventer 8 is arranged between two adjacent branch pipe connecting sub-pipes 7.

[0033] One end of the air extraction main pipe 5 is provided with an air extraction fan.

[0034] Working principle:

[0035] The utility model provides a kind of air extraction pipeline system for rare earth production, and the air extraction branch pipe of the air extraction main pipe above rare earth production line is connected to each reaction kettle, and branch pipe connecting sub-pipe is communicated with air extraction main pipe is arranged, the bottom of the left and right ends of the pipe body of branch pipe connecting sub-pipe is provided with liquid containing bottom groove, and left and right symmetrical inclined flow baffle is arranged in the pipe body of branch pipe connecting sub-pipe, condensed liquid remaining in pipeline is blocked by flow baffle when passing through branch pipe connecting sub-pipe during air extraction, and the drainage of liquid containing bottom groove is opened after a period of time to drain.

[0036] Meanwhile, two anti-backflow bends of inclined section are arranged on the air extraction branch pipe to prevent a small part of condensed liquid from flowing back to the lower part of the air extraction branch pipe.

[0037] On the other hand, backflow preventer is also arranged on the air extraction main pipe, and one backflow preventer is arranged between two adjacent air extraction branch pipes, to further prevent condensed liquid in pipeline in different station sections of air extraction main pipe from flowing back and mixing, so as to pollute product.

[0038] The above is only a specific application example of the present application, and does not constitute any limitation on the protection scope of the present application. Any technical solution formed by equivalent transformation or equivalent replacement falls within the protection scope of the present application.

Claims

1. A system of extraction ducts for rare earth production, characterized by: It includes the total pipe (5) of drawing air which is arranged on the acid dissolving section, extraction section and precipitation section of the rare earth production line, the acid dissolving section is equipped with multiple oxalic acid heat preservation tanks (1) and oxalic acid dissolving kettles (2), the extraction section is equipped with multiple organic solvent reaction kettles (3), the precipitation section is equipped with multiple suction filters (4), the oxalic acid heat preservation tank (1), the oxalic acid dissolving kettle (2) and the organic solvent reaction kettle (3) are sequentially arranged, and the suction filter (4) is arranged on one side of the organic solvent reaction kettle (3); the oxalic acid heat preservation tank (1), the oxalic acid dissolving kettle (2) and the organic solvent reaction kettle (3) are respectively provided with the air outlet, the air outlet is connected to the total pipe (5) of drawing air through the branch pipe (6) and communicates with the total pipe (5) of drawing air; The top end of the branch pipe (6) communicates with the total pipe (5) of drawing air through the branch pipe connecting branch pipe (7), and the bottom end of the branch pipe (6) is connected to the air outlet of each reaction kettle; the middle part of the branch pipe (6) is provided with an anti-backflow bend (61); The branch pipe connecting branch pipe (7) is arranged on the total pipe (5) of drawing air, the branch pipe connecting branch pipe (7) includes a pipe body (71), the left and right ends of the pipe body (71) communicate with the total pipe (5) of drawing air, the front of the pipe body (71) is provided with a through hole which communicates with the branch pipe (6), the bottom of the left and right ends of the pipe body (71) is provided with symmetrical liquid containing bottom grooves (72), the lowest end of the liquid containing bottom groove (72) is provided with a discharge port, and the discharge port is provided with an openable bottom cover (73); the pipe body (71) is provided with two left and right symmetrical flow baffles (74), the top end of the flow baffle (74) at the left end of the pipe body (71) is fixed to the upper left corner of the pipe body (71), and the flow baffle (74) is inclinedly arranged; one backflow preventer (8) is arranged between adjacent two branch pipe connecting branch pipes (7), and the backflow preventer (8) is arranged on the total pipe (5) of drawing air.

2. A system of extraction ducts for the production of rare earths according to claim 1, characterized in that: The anti-backflow bend (61) includes an upper inclined section (611), a vertical section (612) and a lower inclined section (613) which are sequentially connected, and the upper inclined section (611) and the lower inclined section (613) are inclined downward in the same direction.

3. A system of extraction ducts for the production of rare earths according to claim 2, characterized in that: The inclination angle of the upper inclined section (611) and the lower inclined section (613) is 5°-30°.

4. A system of extraction ducts for the production of rare earths according to claim 2, characterized in that: One end of the upper inclined section (611) is connected to the upper part of the branch pipe (6) in a smooth manner, and the other end is connected to the vertical section (612) in a smooth manner.

5. A system of extraction ducts for the production of rare earths according to claim 2, characterized in that: The lower inclined section (613) is connected to the vertical section (612) in a chamfered manner, and the other end is connected to the lower part of the branch pipe (6) in a smooth manner.

6. A system of extraction ducts for the production of rare earths according to claim 1, characterized in that: The cross section of the liquid containing bottom groove (72) is V-shaped.

7. The induced draft duct system for rare earth production of claim 1, wherein: The included angle between the flow baffle (74) at the left end of the pipe body (71) and the left wall of the pipe body (71) is greater than 40°.

8. A system of extraction ducts for the production of rare earths according to claim 1, characterized in that: The bottom end of the flow baffle (74) is water-drop-shaped, which is convenient for blocking the condensed water and guiding the condensed water to drop into the liquid containing bottom groove (72).

9. A system of extraction ducts for the production of rare earths according to claim 8, characterized in that: The bottom end of the flow baffle (74) is higher than the top end of the branch pipe (6).

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