Elementary substance arsenic continuous generation device based on multiple reduction furnaces

Abstract

The utility model provides a continuous elemental arsenic generation device based on multiple reduction furnaces. The continuous elemental arsenic generation device comprises a refined white arsenic distillation furnace, a plurality of vertical carbon reduction furnaces, a plurality of deslagging pipelines and a plurality of gas inlet pipelines, the plurality of vertical carbon reduction furnaces are divided into a plurality of groups, and each vertical carbon reduction furnace is provided with a carbon powder inlet, a reduction furnace gas outlet, a reduction furnace gas inlet and a reduction furnace slag outlet. The input ends of the multiple deslagging pipelines are connected with the reduction furnace slag outlets of the vertical carbon reduction furnaces in a one-to-one correspondence mode, and each deslagging pipeline is provided with a deslagging valve. The gas inlet pipelines comprise gas inlet main pipelines, the input ends of the gas inlet main pipelines of the plurality of gas inlet pipelines are connected with the gas outlet of the distillation furnace, the output ends of the gas inlet main pipelines of the plurality of gas inlet pipelines are respectively connected to the reduction furnace gas inlets of the vertical carbon reduction furnaces in a one-to-one correspondence manner, and each gas inlet main pipeline is provided with a gas inlet main valve. According to the simple substance arsenic continuous generation device based on the multiple reduction furnaces, heat is effectively saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elemental arsenic production devices, and particularly relates to a continuous elemental arsenic production device based on multiple reduction furnaces. Background Art

[0002] Arsenic is a non-metallic element existing in nature and is widely used in industrial fields such as alloy smelting, pesticides, pharmaceuticals, and pigments. Refined white arsenic is highly toxic, and its main component is arsenic trioxide, also known as arsenic oxide. Refined white arsenic is commonly used as a raw material for preparing elemental arsenic in industrial production. In the prior art, the preparation of arsenic generally adopts the carbon thermal reduction method, and the device for preparing elemental arsenic generally includes a distillation furnace and a carbon reduction furnace. The distillation furnace sublimes arsenic trioxide in refined white arsenic into a gaseous state at a certain high temperature, and then inputs it into the carbon reduction furnace. At a certain high temperature, arsenic trioxide reacts with carbon powder to generate gaseous elemental arsenic. After the carbon reduction furnace in the prior art works for a period of time, the carbon powder inside it is consumed, and the carbon reduction furnace must stop working. After discharging the reacted carbon powder, it continues to work. Therefore, the distillation furnace cannot continuously input gaseous arsenic oxide into the carbon reduction furnace. When the carbon reduction furnace stops working, the distillation furnace also needs to cool down and stop working. When the carbon reduction furnace is refilled with new carbon powder, the distillation furnace needs to be reheated to start working again. The repeated cooling and heating operations of the distillation furnace are very wasteful of heat and affect work efficiency.

[0003] Therefore, it is necessary to provide a continuous elemental arsenic production device based on multiple reduction furnaces to solve the above technical problems. Summary of the Utility Model

[0004] The utility model provides a continuous elemental arsenic production device based on multiple reduction furnaces, which effectively saves heat and improves work efficiency.

[0005] The technical solution of the utility model is as follows:

[0006] A continuous elemental arsenic production device based on multiple reduction furnaces, which includes:

[0007] A refined white arsenic distillation furnace, with two ends being a first end and a second end respectively. The first end is provided with a distillation furnace material inlet, the bottom of the second end is provided with a distillation furnace tail slag outlet, and the top is provided with a distillation furnace gas outlet; the distillation furnace material inlet is used to input refined white arsenic powder; the distillation furnace tail slag outlet is used to output arsenic-containing residues; the distillation furnace gas outlet is used to output gaseous arsenic oxide;

[0008] Multiple vertical carbon reduction furnaces, with multiple of the vertical carbon reduction furnaces divided into multiple groups. The top of the vertical carbon reduction furnace is provided with a carbon powder inlet and a reduction furnace gas outlet, and the bottom is provided with a reduction furnace gas inlet and a reduction furnace slag outlet; the carbon powder inlet is used for inputting carbon powder; the reduction furnace gas outlet is used for outputting arsenic-containing gas; the reduction furnace gas inlet is connected to the distillation furnace gas outlet; the reduction furnace slag outlet is used for outputting carbon slag.

[0009] Multiple slag discharge pipes, with the input ends of multiple of the slag discharge pipes respectively and correspondingly connected to the reduction furnace slag outlets of each group of the vertical carbon reduction furnaces. A slag discharge valve is provided on each of the slag discharge pipes for controlling the opening or closing of the slag discharge pipe; and,

[0010] Multiple intake pipes, the intake pipes including an intake main pipe. The input ends of the intake main pipes of multiple of the intake pipes are all connected to the distillation furnace gas outlet, and the output ends are respectively and correspondingly connected to the reduction furnace gas inlets of each group of the vertical carbon reduction furnaces. An intake main valve is provided on each of the intake main pipes for controlling the opening or closing of the intake main pipe.

[0011] In the device for continuously generating elemental arsenic based on multiple reduction furnaces of the present utility model, each group of the vertical carbon reduction furnaces is provided with multiple vertical carbon reduction furnaces; the intake pipes further include multiple intake branch pipes. The number of intake branch pipes of each of the intake pipes is equal to the number of the vertical carbon reduction furnaces in each group. In each of the intake pipes, the input ends of multiple of the intake branch pipes are all connected to the output end of the intake main pipe, and the output ends of multiple of the intake branch pipes are respectively and correspondingly connected to the reduction furnace gas inlets of multiple vertical carbon reduction furnaces in the same group. An intake branch valve is provided on each of the intake branch pipes for controlling the opening or closing of the intake branch pipe.

[0012] In the device for continuously generating elemental arsenic based on multiple reduction furnaces of the present utility model, the vertical carbon reduction furnace includes:

[0013] A furnace body, whose bottom end is open and whose top end is provided with a top wall. The carbon powder inlet is arranged on the top wall, the reduction furnace gas outlet is arranged at the top end of the furnace body, the open bottom end of the furnace body forms the reduction furnace slag outlet, and air inlet holes are arranged on the peripheral side of the bottom end of the furnace body; and,

[0014] A furnace jacket, which wraps around the peripheral side of the bottom end of the furnace body and encloses an outer cavity with the furnace body. The air inlet holes are communicated with the outer cavity, and the reduction furnace gas inlet is arranged on the furnace jacket.

[0015] In the device for continuously generating elemental arsenic based on multiple reduction furnaces of the present utility model, the diameter of the bottom end of the furnace body gradually decreases from top to bottom.

[0016] In the device for continuously generating elemental arsenic based on multiple reduction furnaces according to the present utility model, the device for continuously generating elemental arsenic based on multiple reduction furnaces further includes a nitrogen generator, and an outlet thereof is connected to the reduction furnace gas inlet.

[0017] In the device for continuously generating elemental arsenic based on multiple reduction furnaces according to the present utility model, the refined white arsenic distillation furnace rotates around its own axis, and the first end is higher than the second end.

[0018] In the device for continuously generating elemental arsenic based on multiple reduction furnaces according to the present utility model, the device for continuously generating elemental arsenic based on multiple reduction furnaces further includes a crystallization tank, which includes a tank gas inlet and a tank gas outlet; the tank gas inlet is connected to the reduction furnace gas outlet.

[0019] In the device for continuously generating elemental arsenic based on multiple reduction furnaces according to the present utility model, the device for continuously generating elemental arsenic based on multiple reduction furnaces further includes:

[0020] A condensation arsenic collection chamber, an inlet thereof is connected to the tank gas outlet; and,

[0021] A bag filter, an inlet thereof is connected to an outlet of the condensation arsenic collection chamber.

[0022] In the device for continuously generating elemental arsenic based on multiple reduction furnaces according to the present utility model, the device for continuously generating elemental arsenic based on multiple reduction furnaces further includes a discharge heat exchanger, which is provided with a heat exchanger inlet and a heat exchanger outlet; the heat exchanger inlet is connected to both the distillation furnace tail slag outlet and an output end of the slag discharge pipeline; the heat exchanger outlet is used for outputting the arsenic-containing residue and carbon slag after temperature reduction.

[0023] In the vertical carbon reduction furnace according to the present utility model, the vertical carbon reduction furnace further includes a spiral blade, which is arranged in the furnace body, its axis is vertical, and the spiral blade is rotatably arranged around its own axis.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows: In the device for continuously generating elemental arsenic based on multiple reduction furnaces of the present utility model, when in use, multiple groups of vertical carbon reduction furnaces work alternately, so that the refined white arsenic distillation furnace can work continuously without repeated heating and cooling, effectively saving heat and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following briefly introduces the drawings required to be used in the embodiments. The drawings in the following description are only the corresponding drawings of some embodiments of the present utility model.

[0026] Figure 1Schematic diagram of the structure of the continuous arsenic generation device based on multiple reduction furnaces provided by the preferred embodiment of the present utility model.

[0027] Figure 2 Schematic diagram of the structure of a group of vertical carbon reduction furnaces of the continuous arsenic generation device based on multiple reduction furnaces provided by the preferred embodiment of the present utility model.

[0028] Among them,

[0029] 11. Refined white arsenic distillation furnace,

[0030] 111. First end, 1111. Distillation furnace material inlet, 112. Second end, 1121. Distillation furnace tail slag outlet, 1122. Distillation furnace gas outlet,

[0031] 12. Vertical carbon reduction furnace, 121. Carbon powder inlet, 122. Reduction furnace gas outlet, 123. Reduction furnace gas inlet, 124. Reduction furnace slag outlet, 125. Furnace body, 1251. Top wall, 1252. Air inlet hole, 126. Furnace jacket, 127. Outer cavity, 128. Spiral blade,

[0032] 13. Slag discharge pipeline, 131. Slag discharge valve,

[0033] 14. Intake pipeline,

[0034] 141. Intake main pipeline, 1411. Intake main valve,

[0035] 142. Intake branch pipeline, 1421. Intake branch valve,

[0036] 15. Nitrogen generator,

[0037] 16. Condensation arsenic collection chamber,

[0038] 17. Crystallization tank, 171. Tank gas inlet, 172. Tank gas outlet,

[0039] 18. Discharge heat exchanger, 181. Heat exchanger inlet, 182. Heat exchanger outlet,

[0040] 19. Bag filter.

[0041] In the figure, units with similar structures are denoted by the same reference numerals. Detailed implementation manners

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present utility model.

[0043] The directional terms mentioned in the present utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", "top", and "bottom", etc., are only with reference to the orientation of the accompanying drawings. The directional terms used are for explaining and understanding the present utility model, rather than for limiting the present utility model.

[0044] The words such as "first" and "second" in the terms of the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying relative importance, nor as a limitation on the order of precedence.

[0045] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0046] In the prior art, the preparation of arsenic generally adopts the carbon thermal reduction method. The device for preparing elemental arsenic generally includes a distillation furnace and a carbon reduction furnace. The distillation furnace sublimes arsenic trioxide in refined white arsenic into a gaseous state at a certain high temperature, and then inputs it into the carbon reduction furnace. At a certain high temperature, arsenic trioxide reacts with carbon powder to generate gaseous elemental arsenic. After the carbon reduction furnace in the prior art works for a period of time, the carbon powder inside it is consumed, and the carbon reduction furnace must stop working. After discharging the reacted carbon powder, it continues to work. Therefore, the distillation furnace cannot continuously input gaseous arsenic oxide into the carbon reduction furnace. When the carbon reduction furnace stops working, the distillation furnace also needs to cool down and stop working. When the carbon reduction furnace is refilled with new carbon powder, the distillation furnace needs to be reheated to start working. The operation of repeatedly cooling and heating the distillation furnace is very wasteful of heat and affects the work efficiency.

[0047] The following is a preferred embodiment of a continuous elemental arsenic generation device based on multiple reduction furnaces provided by the present utility model that can solve the above technical problems.

[0048] Please refer to Figure 1 and Figure 2, a preferred embodiment of the present utility model provides a continuous arsenic generation device based on multiple reduction furnaces, which includes a refined white arsenic distillation furnace 11, multiple vertical carbon reduction furnaces 12, multiple slag discharge pipes 13, and multiple intake pipes 14.

[0049] Please refer to Figure 1 , the two ends of the refined white arsenic distillation furnace 11 are respectively a first end 111 and a second end 112. The first end 111 is provided with a distillation furnace material inlet 1111, the bottom of the second end 112 is provided with a distillation furnace tail slag outlet 1121, and the top is provided with a distillation furnace gas outlet 1122; the distillation furnace material inlet 1111 is used to input refined white arsenic powder; the distillation furnace tail slag outlet 1121 is used to output arsenic-containing residues; the distillation furnace gas outlet 1122 is used to output gaseous arsenic oxide.

[0050] The multiple vertical carbon reduction furnaces 12 are divided into multiple groups. The top of the vertical carbon reduction furnace 12 is provided with a carbon powder inlet 121 and a reduction furnace gas outlet 122, and the bottom is provided with a reduction furnace gas inlet 123 and a reduction furnace slag outlet 124; the carbon powder inlet 121 is used to input carbon powder; the reduction furnace gas outlet 122 is used to output arsenic-containing gas; the reduction furnace gas inlet 123 is connected to the distillation furnace gas outlet 1122; the reduction furnace slag outlet 124 is used to output carbon slag.

[0051] The input ends of the multiple slag discharge pipes 13 are respectively connected to the reduction furnace slag outlets 124 of each group of vertical carbon reduction furnaces 12 in a one-to-one correspondence. A slag discharge valve 131 is arranged on each slag discharge pipe 13 to control the opening or closing of the slag discharge pipe 13.

[0052] The intake pipe 14 includes an intake main pipe 141. The input ends of the intake main pipes 141 of the multiple intake pipes 14 are all connected to the distillation furnace gas outlet 1122, and the output ends are respectively connected to the reduction furnace gas inlets 123 of each group of vertical carbon reduction furnaces 12 in a one-to-one correspondence. An intake main valve 1411 is arranged on each intake main pipe 141 to control the opening or closing of the intake main pipe 141.

[0053] For the continuous arsenic generation device based on multiple reduction furnaces of the present utility model, assuming there are two groups of vertical carbon reduction furnaces 12, namely A and B, during use, the slag discharge valve 131 corresponding to the group A vertical carbon reduction furnace 12 is set to the closed state, and the group A vertical carbon reduction furnace 12 is filled with carbon powder through the carbon powder inlet 121.

[0054] Add white arsenic powder into the white arsenic distillation furnace 11 through the material inlet 1111 of the distillation furnace, so that arsenic oxide in the white arsenic powder sublimes into gaseous arsenic oxide at high temperature, and the gaseous arsenic oxide is output through the gas outlet 1122 of the distillation furnace. Keep the main intake valve 1411 corresponding to the group A vertical carbon reduction furnace 12 in the open state. The gaseous arsenic oxide is transported through the main intake pipeline 141 connected to the group A vertical carbon reduction furnace 12, and then enters the group A vertical carbon reduction furnace 12 through the reduction furnace gas inlet 123 at the bottom. The gaseous arsenic oxide flows from bottom to top. During the flow process, it reacts with carbon powder at high temperature to generate gaseous elemental arsenic and carbon monoxide. The arsenic-containing gas is output through the reduction furnace gas outlet 122 at the top.

[0055] After a period of time, when all the carbon powder in the group A vertical carbon reduction furnace 12 is reacted and becomes carbon slag, set the main intake valve 1411 corresponding to the group A vertical carbon reduction furnace 12 to the closed state to stop transporting gaseous arsenic oxide into the group A vertical carbon reduction furnace 12; set the slag discharge valve 131 corresponding to the group A vertical carbon reduction furnace 12 to the open state to discharge the carbon slag in the group A vertical carbon reduction furnace 12.

[0056] Set the slag discharge valve 131 corresponding to the group B vertical carbon reduction furnace 12 to the closed state, and fill the group B vertical carbon reduction furnace 12 with carbon powder through the carbon powder inlet 121; set the main intake valve 1411 corresponding to the group B vertical carbon reduction furnace 12 to the open state. The gaseous arsenic oxide is transported through the main intake pipeline 141 connected to the group B vertical carbon reduction furnace 12, and then enters the group B vertical carbon reduction furnace 12 through the reduction furnace gas inlet 123 at the bottom. The gaseous arsenic oxide flows from bottom to top. During the flow process, it reacts with carbon powder at high temperature to generate gaseous elemental arsenic and carbon monoxide. The arsenic-containing gas is output through the reduction furnace gas outlet 122 at the top.

[0057] After a period of time, when all the carbon powder in the group B vertical carbon reduction furnace 12 is reacted and becomes carbon slag, set the main intake valve 1411 corresponding to the group B vertical carbon reduction furnace 12 to the closed state to stop transporting gaseous arsenic oxide into the group B vertical carbon reduction furnace 12. Set the slag discharge valve 131 corresponding to the group B vertical carbon reduction furnace 12 to the open state to discharge the carbon slag in the group B vertical carbon reduction furnace 12. Again, set the slag discharge valve 131 corresponding to the group A vertical carbon reduction furnace 12 to the closed state, and set the main intake valve 1411 corresponding to the group A vertical carbon reduction furnace 12 to the open state.

[0058] The group A vertical carbon reduction furnace 12 and the group B vertical carbon reduction furnace 12 work alternately, so that the white arsenic distillation furnace 11 can work continuously without repeated heating and cooling, effectively saving heat and improving work efficiency.

[0059] Please refer toFigure 2 Meanwhile, please combine with Figure 1 . Each group of vertical carbon reduction furnaces 12 is provided with a plurality of vertical carbon reduction furnaces 12; the intake pipe 14 further includes a plurality of intake sub-pipes 142. The number of intake sub-pipes 142 in each intake pipe 14 is equal to the number of vertical carbon reduction furnaces 12 in each group. In each intake pipe 14, the input ends of the plurality of intake sub-pipes 142 are all connected to the output end of the intake main pipe 141, and the output ends of the plurality of intake sub-pipes 142 are respectively connected in one-to-one correspondence with the reduction furnace gas inlets 123 of the plurality of vertical carbon reduction furnaces 12 in the same group. Each intake sub-pipe 142 is provided with an intake sub-valve 1421 for controlling the opening or closing of the intake sub-pipe 142. If the amount of gaseous arsenic oxide output by the refined white arsenic distillation furnace 11 is large, then all the intake sub-valves 1421 corresponding to all the vertical carbon reduction furnaces 12 in the same group are set to the open state, so that all the vertical carbon reduction furnaces 12 in this group work simultaneously; if the amount of gaseous arsenic oxide output by the refined white arsenic distillation furnace 11 is small, then the intake sub-valves 1421 corresponding to some of the vertical carbon reduction furnaces 12 in the same group are set to the open state, so that some of the vertical carbon reduction furnaces 12 in this group work, reducing the workload of repeatedly discharging carbon slag and adding carbon powder.

[0060] Please refer to Figure 2 , the vertical carbon reduction furnace 12 includes a furnace body 125 and a furnace jacket 126. The bottom end of the furnace body 125 is open, and a top wall 1251 is provided at the top end. The carbon powder inlet 121 is provided on the top wall 1251, the reduction furnace gas outlet 122 is provided at the top end of the furnace body 125, the open bottom end of the furnace body 125 forms a reduction furnace slag outlet 124, and air inlet holes 1252 are provided on the peripheral side of the bottom end of the furnace body 125. The furnace jacket 126 wraps around the peripheral side of the bottom end of the furnace body 125 and encloses an outer cavity 127 with the furnace body 125. The air inlet holes 1252 are communicated with the outer cavity 127, and the reduction furnace gas inlet 123 is provided on the furnace jacket 126. The gaseous arsenic oxide enters the outer cavity 127 through the reduction furnace gas inlet 123, and then enters the furnace body 125 through the air inlet holes 1252. The air inlet holes 1252 are provided on the peripheral side of the bottom end of the furnace body 125, which can make the gaseous arsenic oxide evenly distributed in the furnace body 125, so as to evenly contact with the carbon powder.

[0061] Please continue to refer to Figure 2 , the diameter of the bottom end of the furnace body 125 gradually decreases from top to bottom, which can make the carbon slag slowly output and avoid blocking the slag discharge pipe 13.

[0062] Please continue to refer to Figure 2 , the vertical carbon reduction furnace 12 further includes a spiral blade 128, which is arranged inside the furnace body 125, its axis is vertical, and the spiral blade 128 is rotatably arranged around its own axis. The carbon powder is conveyed downward by the rotation of the spiral blade 128, making the carbon powder flow smoothly.

[0063] Please continue to refer toFigure 2 The distance between the spiral blade 128 and the side wall of the furnace body 125 is 10 mm - 20 mm, which neither affects the rotation of the spiral blade 128 nor prevents all carbon powders from being conveyed downward.

[0064] Please refer to Figure 1 The device for continuously generating elemental arsenic based on multiple reduction furnaces further includes a nitrogen generator 15, the outlet of which is connected to the reduction furnace gas inlet 123, so as to make the atmosphere in the vertical carbon reduction furnace 12 nearly oxygen-free and prevent an explosion caused by the reaction between oxygen and carbon monoxide.

[0065] Please continue to refer to Figure 1 The refined white arsenic distillation furnace 11 rotates around its own axis, so that the refined white arsenic powder can fully contact the side wall of the refined white arsenic distillation furnace 11, which is beneficial to heat absorption. The first end 111 is higher than the second end 112, so that the arsenic-containing residue can move to the distillation furnace tail slag outlet 1121 for easy discharge.

[0066] Please continue to refer to Figure 1 The device for continuously generating elemental arsenic based on multiple reduction furnaces further includes a crystallization tank 17. The crystallization tank 17 includes a tank gas inlet 171 and a tank gas outlet 172; the tank gas inlet 171 is connected to the reduction furnace gas outlet 122. With the above structure, the crystallization tank 17 cools the arsenic-containing gas, so that the gaseous elemental arsenic inside becomes solid, and other gases remain gaseous, thereby collecting the elemental arsenic.

[0067] Please continue to refer to Figure 1 The device for continuously generating elemental arsenic based on multiple reduction furnaces further includes a condensation arsenic collection chamber 16 and a bag filter 19. The inlet of the condensation arsenic collection chamber 16 is connected to the tank gas outlet 172. The inlet of the bag filter 19 is connected to the outlet of the condensation arsenic collection chamber 16. Both the condensation arsenic collection chamber 16 and the bag filter 19 can collect refined white arsenic and add it to the refined white arsenic distillation furnace 11 for treatment again, improving the utilization rate of refined white arsenic.

[0068] Please continue to refer to Figure 1 The device for continuously generating elemental arsenic based on multiple reduction furnaces further includes a discharge heat exchanger 18, which is provided with a heat exchanger inlet 181 and a heat exchanger outlet 182; the heat exchanger inlet 181 is connected to both the distillation furnace tail slag outlet 1121 and the output end of the slag discharge pipeline 13; the heat exchanger outlet 182 is used to output the cooled arsenic-containing residue and carbon slag. With the above structure, the arsenic-containing residue and carbon slag are input into the discharge heat exchanger 18 through the heat exchanger inlet 181, and the discharge heat exchanger 18 can cool the arsenic-containing residue and carbon slag for easy stacking.

[0069] The working process of the device for continuously generating elemental arsenic based on multiple reduction furnaces in the preferred embodiment of the present utility model:

[0070] Suppose there are two groups of vertical carbon reduction furnaces 12, namely Group A and Group B. During use, set the slag discharge valve 131 corresponding to the vertical carbon reduction furnaces 12 in Group A to the closed state, and fill the vertical carbon reduction furnaces 12 in Group A with carbon powder through the carbon powder inlet 121; set the main intake valve 1411 corresponding to the vertical carbon reduction furnaces 12 in Group A to the open state, and gaseous arsenic trioxide is transported into the vertical carbon reduction furnaces 12 in Group A through the main intake pipeline 141 connected to the vertical carbon reduction furnaces 12 in Group A. After a period of time, when all the carbon powder in the vertical carbon reduction furnaces 12 in Group A is reacted and becomes carbon slag, set the main intake valve 1411 corresponding to the vertical carbon reduction furnaces 12 in Group A to the closed state to stop transporting gaseous arsenic trioxide into the vertical carbon reduction furnaces 12 in Group A; set the slag discharge valve 131 corresponding to the vertical carbon reduction furnaces 12 in Group A to the open state to discharge the carbon slag in the vertical carbon reduction furnaces 12 in Group A.

[0071] Set the slag discharge valve 131 corresponding to the vertical carbon reduction furnaces 12 in Group B to the closed state, and fill the vertical carbon reduction furnaces 12 in Group B with carbon powder through the carbon powder inlet 121; set the main intake valve 1411 corresponding to the vertical carbon reduction furnaces 12 in Group B to the open state, and gaseous arsenic trioxide is transported into the vertical carbon reduction furnaces 12 in Group B through the main intake pipeline 141 connected to the vertical carbon reduction furnaces 12 in Group B. After a period of time, when all the carbon powder in the vertical carbon reduction furnaces 12 in Group B is reacted and becomes carbon slag, set the main intake valve 1411 corresponding to the vertical carbon reduction furnaces 12 in Group B to the closed state to stop transporting gaseous arsenic trioxide into the vertical carbon reduction furnaces 12 in Group B; set the slag discharge valve 131 corresponding to the vertical carbon reduction furnaces 12 in Group B to the open state to discharge the carbon slag in the vertical carbon reduction furnaces 12 in Group B.

[0072] Once again, set the slag discharge valve 131 corresponding to the vertical carbon reduction furnaces 12 in Group A to the closed state, and set the main intake valve 1411 corresponding to the vertical carbon reduction furnaces 12 in Group A to the open state. The vertical carbon reduction furnaces 12 in Group A and the vertical carbon reduction furnaces 12 in Group B work alternately.

[0073] The arsenic-containing gas is input into the crystallization tank 17 through the tank gas inlet 171. The crystallization tank 17 cools the arsenic-containing gas, making the gaseous elemental arsenic inside become solid, while other gases remain gaseous, so as to collect the elemental arsenic. The gas output from the tank gas outlet 172 is successively input into the condensation arsenic collection chamber 16 and the bag filter 19 to collect refined white arsenic, which is then added to the refined white arsenic distillation furnace 11 for further treatment.

[0074] The arsenic-containing residue and carbon slag are input into the discharge heat exchanger 18 through the heat exchanger inlet 181. The discharge heat exchanger 18 can cool the arsenic-containing residue and carbon slag for easy stacking.

[0075] This is the working process of the continuous arsenic generation device based on multiple reduction furnaces in this preferred embodiment.

[0076] When the continuous arsenic generation device based on multiple reduction furnaces of the present utility model is in use, multiple groups of vertical carbon reduction furnaces work alternately, so that the refined white arsenic distillation furnace can work continuously without repeated heating and cooling, effectively saving heat and improving work efficiency.

[0077] In summary, although the present utility model has been disclosed above with preferred embodiments, the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the concept of the technical solution of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A continuous generation device for elemental arsenic based on multiple reduction furnaces, characterized in that, Comprising: A refined white arsenic distillation furnace, with two ends being the first end and the second end respectively. The first end is provided with a distillation furnace material inlet, the bottom of the second end is provided with a distillation furnace tail slag outlet, and the top of the second end is provided with a distillation furnace gas outlet; the distillation furnace material inlet is used to input refined white arsenic powder; the distillation furnace tail slag outlet is used to output arsenic-containing residues; the distillation furnace gas outlet is used to output gaseous arsenic oxide; Multiple vertical carbon reduction furnaces, which are divided into multiple groups. The top of the vertical carbon reduction furnace is provided with a carbon powder inlet and a reduction furnace gas outlet, and the bottom is provided with a reduction furnace gas inlet and a reduction furnace slag outlet; the carbon powder inlet is used to input carbon powder; the reduction furnace gas outlet is used to output arsenic-containing gas; the reduction furnace gas inlet is connected to the distillation furnace gas outlet; the reduction furnace slag outlet is used to output carbon slag; Multiple slag discharge pipes, the input ends of the multiple slag discharge pipes are respectively connected in one-to-one correspondence with the reduction furnace slag outlets of each group of the vertical carbon reduction furnaces, and each slag discharge pipe is provided with a slag discharge valve for controlling the opening or closing of the slag discharge pipe; and, Multiple intake pipes, the intake pipes include an intake main pipe. The input ends of the intake main pipes of the multiple intake pipes are all connected to the distillation furnace gas outlet, and the output ends are respectively connected in one-to-one correspondence to the reduction furnace gas inlets of each group of the vertical carbon reduction furnaces. Each intake main pipe is provided with an intake main valve for controlling the opening or closing of the intake main pipe.

2. The continuous arsenic generation device based on multiple reduction furnaces according to claim 1, wherein Each group of the vertical carbon reduction furnaces is provided with multiple vertical carbon reduction furnaces; the intake pipes further include multiple intake branch pipes. The number of intake branch pipes of each intake pipe is equal to the number of vertical carbon reduction furnaces in each group. In each intake pipe, the input ends of the multiple intake branch pipes are all connected to the output end of the intake main pipe, and the output ends of the multiple intake branch pipes are respectively connected in one-to-one correspondence to the reduction furnace gas inlets of multiple vertical carbon reduction furnaces in the same group. Each intake branch pipe is provided with an intake branch valve for controlling the opening or closing of the intake branch pipe.

3. The continuous arsenic generation device based on multiple reduction furnaces according to claim 1, characterized in that The vertical carbon reduction furnace includes: A furnace body, whose bottom end is open and the top end is provided with a top wall. The carbon powder inlet is arranged on the top wall, the reduction furnace gas outlet is arranged at the top end of the furnace body, the open bottom end of the furnace body forms the reduction furnace slag outlet, and air inlet holes are arranged on the circumferential side of the bottom end of the furnace body; and, A furnace jacket, which wraps around the circumferential side of the bottom end of the furnace body and encloses an outer cavity with the furnace body. The air inlet holes are communicated with the outer cavity, and the reduction furnace gas inlet is arranged on the furnace jacket.

4. The continuous arsenic generation device based on multiple reduction furnaces according to claim 3, characterized in that, The diameter of the bottom end of the furnace body gradually decreases from top to bottom.

5. The continuous generation device of elemental arsenic based on multiple reduction furnaces according to claim 1, characterized in that, The device for continuously generating elemental arsenic based on multiple reduction furnaces further includes a nitrogen generator, whose outlet is connected to the reduction furnace gas inlet.

6. The continuous arsenic generation device based on multiple reduction furnaces according to claim 1, characterized in that, The refined white arsenic distillation furnace rotates around its own axis, and the first end is higher than the second end.

7. The continuous arsenic generation device based on multiple reduction furnaces according to claim 1, characterized in that, The device for continuously generating elemental arsenic based on multiple reduction furnaces further includes a crystallization tank, which includes a tank gas inlet and a tank gas outlet; the tank gas inlet is connected to the reduction furnace gas outlet.

8. The continuous arsenic generation device based on multiple reduction furnaces according to claim 7, wherein, The device for continuously generating elemental arsenic based on multiple reduction furnaces further includes: A condensation arsenic collection chamber, whose inlet is connected to the gas outlet of the tank; and, A bag filter, whose inlet is connected to the outlet of the condensation arsenic collection chamber.

9. The continuous arsenic generation device based on multiple reduction furnaces according to claim 1, wherein, The continuous elementary arsenic generation device based on multiple reduction furnaces further includes a discharge heat exchanger, which is provided with a heat exchanger inlet and a heat exchanger outlet; the heat exchanger inlet is connected to both the tail slag outlet of the distillation furnace and the output end of the slag discharge pipeline; the heat exchanger outlet is used to output the arsenic-containing residue and carbon slag after temperature reduction.

10. The continuous production device of elemental arsenic based on multiple reduction furnaces according to claim 3, wherein, The vertical carbon reduction furnace further includes a spiral blade, which is arranged in the furnace body, its axis is vertical, and the spiral blade is rotatably arranged around its own axis.

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