Equipment for continuously generating elemental arsenic

Abstract

The utility model provides equipment for continuously generating elemental arsenic. The equipment comprises a refined white arsenic distillation furnace, a vertical carbon reduction furnace and a discharge heat exchanger, the refined white arsenic distillation furnace is provided with a distillation furnace material inlet, a distillation furnace tailing outlet, a distillation furnace gas outlet and a distillation furnace slag inlet. The vertical carbon reduction furnace comprises a furnace body, a furnace jacket, a slag receiving barrel and a movable cover. The furnace body is provided with a carbon powder inlet, a reduction furnace gas outlet, a gas inlet hole and a reduction furnace slag outlet. The furnace jacket is provided with a reduction furnace gas inlet; the reduction furnace gas inlet is connected with the distillation furnace gas outlet. The slag receiving barrel is provided with a barrel inlet and a barrel outlet. The barrel inlet is connected with the slag outlet of the reduction furnace, and the barrel outlet is connected to the distillation slag inlet. The movable cover is movably arranged in the slag receiving barrel in the vertical direction, and the movable cover comprises a blocking position and an opening position on the moving track of the movable cover. According to the equipment for continuously generating elemental arsenic, the refined arsenic distillation furnace can continuously generate gaseous arsenic oxide, and the gaseous arsenic oxide is continuously introduced into the vertical carbon reduction furnace, so that heat is effectively saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment for generating elementary arsenic, in particular to an equipment for continuously generating elementary arsenic. 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 called arsenic oxide. Refined white arsenic is commonly used as a raw material for preparing elementary arsenic in industrial production. In the prior art, the preparation of arsenic generally adopts the carbon thermal reduction method. The device for preparing elementary arsenic generally includes a distillation furnace and a carbon reduction furnace. The distillation furnace sublimes arsenic trioxide in refined white arsenic into a gas 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 elementary arsenic. In the device for preparing elementary arsenic in the prior art, after the carbon reduction furnace 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 wastes a lot of heat and affects the work efficiency.

[0003] Therefore, it is necessary to provide an equipment for continuously generating elementary arsenic to solve the above technical problems. Summary of the Utility Model

[0004] The utility model provides an equipment for continuously generating elementary arsenic, which can effectively save heat and improve work efficiency.

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

[0006] An equipment for continuously generating elementary arsenic, which comprises:

[0007] A refined white arsenic distillation furnace, one end of which is provided with a distillation furnace material inlet, and the bottom of the other end is provided with a distillation furnace tail slag outlet, and the top is provided with a distillation furnace gas outlet and a distillation furnace slag inlet; the distillation furnace material inlet is used for inputting refined white arsenic powder; the distillation furnace tail slag outlet is used for outputting arsenic-containing residues; the distillation furnace gas outlet is used for outputting gaseous arsenic oxide;

[0008] Vertical carbon reduction furnace, which includes a furnace body, a furnace jacket, a slag receiving bucket and a movable cover; the furnace body is provided with a carbon powder inlet, a reduction furnace gas outlet, an air inlet hole and a reduction furnace slag outlet; the bottom end of the furnace body is open and the top end is provided with a top wall, the carbon powder inlet is arranged on the top wall for inputting carbon powder; the reduction furnace gas outlet is arranged at the top end of the furnace body for outputting arsenic-containing gas; the air inlet hole is arranged on the circumferential side of the bottom end of the furnace body; the open bottom end of the furnace body forms the reduction furnace slag outlet; the furnace jacket 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 hole is communicated with the outer cavity, the furnace jacket is provided with a reduction furnace gas inlet, and the reduction furnace gas inlet is connected with the distillation furnace gas outlet; the top end of the slag receiving bucket is provided with a bucket inlet and the bottom end is provided with a bucket outlet; the bucket inlet is connected to the reduction furnace slag outlet, and the bucket outlet is connected to the distillation furnace slag inlet, and the bucket outlet is used for outputting the reacted carbon powder; the movable cover is vertically movably arranged in the slag receiving bucket, and the movable cover includes a blocking position and an open position on its moving track. When the movable cover is located at the blocking position, the movable cover blocks the connection between the bucket inlet and the reduction furnace slag outlet. When the movable cover is located at the open position, the movable cover is located below the bucket inlet, and there is a gap between the movable cover and the side wall of the slag receiving bucket; and,

[0009] Discharge heat exchanger, which is provided with a heat exchanger inlet and a heat exchanger outlet; the heat exchanger inlet is connected with the distillation furnace tail slag outlet; the heat exchanger outlet is used for outputting the cooled arsenic-containing residue.

[0010] In the device for continuously generating elemental arsenic according to the present invention, 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.

[0011] In the device for continuously generating elemental arsenic according to the present invention, the vertical carbon reduction furnace further includes a connecting shaft, which passes through the furnace body, its axis is vertical, the connecting shaft is rotatably arranged around its own axis and is vertically movably arranged, the bottom end of the connecting shaft is connected to the movable cover for driving the movable cover to move vertically, and the side wall of the connecting shaft is connected to the spiral blade for driving the spiral blade to rotate.

[0012] In the device for continuously generating elemental arsenic according to the present invention, the distance between the spiral blade and the side wall of the furnace body is 10 mm - 20 mm.

[0013] In the device for continuously generating elemental arsenic according to the present invention, the movable cover is provided with a plurality of exhaust holes.

[0014] In the device for continuously generating elemental arsenic according to the present invention, the bottom diameter of the furnace body gradually decreases from top to bottom.

[0015] In the apparatus for continuously generating elemental arsenic according to the present utility model, the furnace jacket is further provided with a nitrogen inlet for inputting nitrogen.

[0016] In the apparatus for continuously generating elemental arsenic according to the present utility model, the slag receiving bucket includes a bucket body and a bottom wall; the bucket body is in a cylindrical shape with openings at both ends, the top opening of the bucket body forms the bucket inlet, the diameter of the top of the bucket body gradually increases from top to bottom, and the diameter of the bottom of the bucket body gradually decreases from top to bottom; the bottom wall is connected to the lower opening of the bucket body, and the bucket outlet is arranged on the bottom wall.

[0017] In the apparatus for continuously generating elemental arsenic according to the present utility model, a plurality of reduction furnace gas inlets are provided, and the plurality of reduction furnace gas inlets are evenly distributed along the circumferential direction of the furnace jacket; a plurality of distillation furnace gas outlets are provided and are matched with the reduction furnace gas inlets.

[0018] In the apparatus for continuously generating elemental arsenic according to the present utility model, the apparatus for continuously generating elemental arsenic further includes:

[0019] 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;

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

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

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the equipment for continuously generating elemental arsenic of the present utility model, during use, the movable cover is moved to the blocking position, the furnace body is filled with carbon powder through the carbon powder inlet, and the carbon powder is heated; refined white arsenic powder is added into the refined white arsenic distillation furnace through the distillation furnace material inlet. Arsenic trioxide in the refined white arsenic powder sublimes into a gaseous state at high temperature. After the gaseous arsenic trioxide is output from the distillation furnace gas outlet, it is input into the outer cavity through the reduction furnace gas inlet, and then enters the furnace body through the air inlet holes. The gaseous arsenic trioxide and carbon powder react at high temperature to generate gaseous elemental arsenic and carbon monoxide. The arsenic-containing gas is output through the reduction furnace gas outlet located at the top of the furnace body; since the gaseous arsenic trioxide flows from bottom to top in the furnace body, after reacting for a period of time, the carbon in the carbon powder at the bottom of the furnace body is consumed first. It is necessary to move the movable cover downward to the open position, so that part of the carbon powder in the furnace body is output from the reduction furnace slag outlet, and is input into the slag receiving bucket through the bucket inlet, and then continues to be conveyed downward through the gap between the movable cover and the side wall of the slag receiving bucket. After flowing out from the bucket outlet, it enters the refined white arsenic distillation furnace through the distillation furnace slag inlet, and then is output through the distillation furnace tail slag outlet, and is input into the discharge heat exchanger through the heat exchanger inlet. After the reacted carbon powder in the furnace body is discharged from the furnace body, the movable cover is moved upward to the blocking position, and new carbon powder is continuously added into the furnace body through the carbon powder inlet. The movable cover moves back and forth between the blocking position and the open position; for the equipment for continuously generating elemental arsenic of the present utility model, the gaseous arsenic trioxide preferentially reacts with the carbon powder located at the bottom of the furnace body. When the carbon powder at the bottom reacts completely, the movable cover is moved to the open position to discharge the reacted carbon powder in the furnace body. At this time, the arsenic trioxide gas can react with the carbon powder located at the top of the furnace body. After the reacted carbon powder is discharged from the furnace body, the movable cover is moved to the blocking position to supplement new carbon powder. There can always be carbon powder in the furnace body, so the arsenic trioxide gas can be continuously introduced into the furnace body, and the refined white arsenic distillation furnace can maintain a constant temperature and continuously generate gaseous arsenic trioxide, effectively saving heat and effectively improving work efficiency.

[0023] In addition, the reacted carbon powder in the furnace body is input into the refined white arsenic distillation furnace and can be input into the discharge heat exchanger together with the arsenic-containing tail slag, so that both the arsenic-containing tail slag and the reacted carbon powder can be cooled for easy stacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 for use in the embodiments. The drawings in the following description are only the corresponding drawings of some embodiments of the present utility model.

[0025] Figure 1 It is a schematic structural diagram of the equipment for continuously generating elemental arsenic provided by a preferred embodiment of the present utility model.

[0026] Figure 2Structural schematic diagram of the vertical carbon reduction furnace of the device for continuously generating elemental arsenic provided by the preferred embodiment of the present utility model.

[0027] Among them,

[0028] 11. Refined white arsenic distillation furnace, 111. Distillation furnace material inlet, 112. Distillation furnace tail slag outlet, 113. Distillation furnace gas outlet, 114. Distillation furnace slag inlet,

[0029] 12. Vertical carbon reduction furnace,

[0030] 121. Furnace body, 1211. Carbon powder inlet, 1212. Reduction furnace gas outlet, 1213. Air inlet hole, 1214. Reduction furnace slag outlet, 1215. Top wall,

[0031] 122. Furnace jacket, 1221. Outer cavity, 1222. Reduction furnace gas inlet, 1223. Nitrogen inlet,

[0032] 123. Slag receiving bucket, 1231. Bucket inlet, 1232. Bucket outlet, 1233. Bucket body, 1234. Bottom wall,

[0033] 124. Movable cover,

[0034] 125. Spiral blade,

[0035] 126. Connecting shaft,

[0036] 13. Discharge heat exchanger, 131. Heat exchanger inlet, 132. Heat exchanger outlet,

[0037] 14. High-temperature filter, 141. Filter gas inlet, 142. Filter gas outlet, 143. Filter gas impurity outlet,

[0038] 15. Crystallization tank, 151. Tank gas inlet, 152. Tank gas outlet.

[0039] In the figure, units with similar structures are denoted by the same reference numerals. Detailed implementation mode

[0040] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described 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 the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0041] 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 attached drawings. The directional terms used are for explaining and understanding the present utility model, rather than for limiting the present utility model.

[0042] In the terms of the present utility model, words such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance, nor as a limitation on the sequence.

[0043] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms 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. It 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.

[0044] 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. In the device for preparing elemental arsenic in the prior art, after the carbon reduction furnace 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.

[0045] The following is a preferred embodiment of a device for continuously generating elemental arsenic provided by the present utility model, which can solve the above technical problems.

[0046] Please refer to Figure 1 , the preferred embodiment of the present utility model provides a device for continuously generating elemental arsenic, which includes a refined white arsenic distillation furnace 11, a vertical carbon reduction furnace 12 and a discharge heat exchanger 13.

[0047] One end of the white arsenic distillation furnace 11 is provided with a distillation furnace material inlet 111, and the bottom of the other end is provided with a distillation furnace tail slag outlet 112, the top is provided with a distillation furnace gas outlet 113 and a distillation furnace slag inlet 114. The distillation furnace material inlet 111 is used to input white arsenic powder; the distillation furnace tail slag outlet 112 is used to output arsenic-containing residues; the distillation furnace gas outlet 113 is used to output gaseous arsenic oxide.

[0048] Please refer to Figure 1 and Figure 2 , the vertical carbon reduction furnace 12 includes a furnace body 121, a furnace jacket 122, a slag receiving bucket 123 and a movable cover 124. The furnace body 121 is provided with a carbon powder inlet 1211, a reduction furnace gas outlet 1212, an air inlet hole 1213 and a reduction furnace slag outlet 1214. The bottom end of the furnace body 121 is open, and the top end is provided with a top wall 1215. The carbon powder inlet 1211 is arranged on the top wall 1215 and is used to input carbon powder. The reduction furnace gas outlet 1212 is arranged at the top end of the furnace body 121 and is used to output arsenic-containing gas; the air inlet hole 1213 is arranged on the circumferential side of the bottom end of the furnace body 121; the open bottom end of the furnace body 121 forms a reduction furnace slag outlet 1214; the furnace jacket 122 is wrapped around the circumferential side of the bottom end of the furnace body 121 and encloses an outer cavity 1221 with the furnace body 121. The air inlet hole 1213 is communicated with the outer cavity 1221, and the furnace jacket 122 is provided with a reduction furnace gas inlet 1222, and the reduction furnace gas inlet 1222 is connected to the distillation furnace gas outlet 113. The top end of the slag receiving bucket 123 is provided with a bucket inlet 1231, and the bottom end is provided with a bucket outlet 1232; the bucket inlet 1231 is connected to the reduction furnace slag outlet 1214, and the bucket outlet 1232 is connected to the distillation furnace slag inlet 114. The bucket outlet 1232 is used to output the reacted carbon powder. The movable cover 124 is movably arranged vertically in the slag receiving bucket 123. The movable cover 124 includes a blocking position and an open position on its movement track. When the movable cover 124 is located at the blocking position, the movable cover 124 blocks the connection between the bucket inlet 1231 and the reduction furnace slag outlet 1214. When the movable cover 124 is located at the open position, the movable cover 124 is located below the bucket inlet 1231, and there is a gap between the movable cover 124 and the side wall of the slag receiving bucket 123.

[0049] Please refer to Figure 1 , the discharge heat exchanger 13 is provided with a heat exchanger inlet 131 and a heat exchanger outlet 132; the heat exchanger inlet 131 is connected to the distillation furnace tail slag outlet 112; the heat exchanger outlet 132 is used to output the cooled arsenic-containing residues and the reacted carbon powder.

[0050] The device for continuously generating elemental arsenic of the present utility model, when in use, moves the movable cover 124 to the blocking position, fills the furnace body 121 with carbon powder through the carbon powder inlet 1211, and heats the carbon powder; adds refined white arsenic powder into the refined white arsenic distillation furnace 11 through the distillation furnace material inlet 111. The arsenic oxide in the refined white arsenic powder sublimes into a gaseous state at high temperature. After the gaseous arsenic oxide is output from the distillation furnace gas outlet 113, it is input into the outer cavity 1221 through the reduction furnace gas inlet 1222, and then enters the furnace body 121 through the air inlet hole 1213. The gaseous arsenic oxide and the carbon powder react at high temperature to generate gaseous elemental arsenic and carbon monoxide. The arsenic-containing gas is output through the reduction furnace gas outlet 1212 located at the top of the furnace body 121; since the gaseous arsenic oxide flows from bottom to top in the furnace body 121, after reacting for a period of time, the carbon in the carbon powder at the bottom of the furnace body 121 is consumed first. It is necessary to move the movable cover 124 downward to the open position, so that part of the carbon powder in the furnace body 121 is output from the reduction furnace slag outlet 1214. The reacted carbon powder is input into the slag receiving bucket 123 through the bucket inlet 1231, and then continues to be conveyed downward through the gap between the movable cover 124 and the side wall of the slag receiving bucket 123. After flowing out from the bucket outlet 1232, it enters the refined white arsenic distillation furnace 11 through the distillation furnace slag inlet 114, and then is output through the distillation furnace tail slag outlet 112, and is input into the discharge heat exchanger 13 through the heat exchanger inlet 131. After the reacted carbon powder in the furnace body 121 is discharged from the furnace body 121, the movable cover 124 moves upward to the blocking position, and continues to add new carbon powder into the furnace body 121 through the carbon powder inlet 1211. The movable cover 124 moves back and forth between the blocking position and the open position; for the device for continuously generating elemental arsenic of the present utility model, the gaseous arsenic oxide preferentially reacts with the carbon powder at the bottom of the furnace body 121. When the carbon powder at the bottom reacts completely, the movable cover 124 moves to the open position to discharge the reacted carbon powder in the furnace body 121. At this time, the arsenic oxide gas can react with the carbon powder at the top of the furnace body 121. After the reacted carbon powder is discharged from the furnace body 121, the movable cover 124 moves to the blocking position to supplement new carbon powder. There can always be carbon powder in the furnace body 121. Therefore, the arsenic oxide gas can be continuously introduced into the furnace body 121, and the refined white arsenic distillation furnace 11 can maintain a constant temperature and continuously generate gaseous arsenic oxide, effectively saving heat and effectively improving work efficiency.

[0051] In addition, the reacted carbon powder in the furnace body 121 is input into the refined white arsenic distillation furnace 11 and can be input into the discharge heat exchanger 13 together with the arsenic-containing tail slag, so that both the arsenic-containing tail slag and the reacted carbon powder can be cooled for easy stacking.

[0052] Please refer to Figure 2, the vertical carbon reduction furnace 12 further includes a spiral blade 125, which is arranged inside the furnace body 121, its axis is vertical, and the spiral blade 125 is rotatably arranged around its own axis. When replenishing carbon powder into the furnace body 121, the spiral blade 125 can rotate to convey the carbon powder downward to fill the furnace body 121 with carbon powder; when it is necessary to discharge the carbon powder at the bottom of the furnace body 121, the spiral blade 125 can rotate to smoothly discharge the carbon powder.

[0053] Please continue to refer to Figure 2 , the vertical carbon reduction furnace 12 further includes a connecting shaft 126, which passes through the furnace body 121, its axis is vertical, the connecting shaft 126 is rotatably arranged around its own axis, and is arranged to move vertically. The bottom end of the connecting shaft 126 is connected to the movable cover 124 for driving the movable cover 124 to move vertically. The side wall of the connecting shaft 126 is connected to the spiral blade 125 for driving the spiral blade 125 to rotate. The connecting shaft 126 can not only drive the movable cover 124 to move up and down, but also control the rotation of the spiral blade 125, making the structure compact.

[0054] Please continue to refer to Figure 2 , the distance between the spiral blade 125 and the side wall of the furnace body 121 is 10 mm - 20 mm, which will neither affect the rotation of the spiral blade 125 nor prevent the carbon powder from being smoothly conveyed downward.

[0055] Please continue to refer to Figure 2 , a plurality of exhaust holes are provided on the movable cover 124, and when the air pressure in the furnace body 121 is too high, the gas can be discharged through the exhaust holes.

[0056] Please continue to refer to Figure 2 , the bottom diameter of the furnace body 121 gradually decreases from top to bottom, so that the reacted carbon powder can be slowly conveyed downward to avoid blocking the slag receiving bucket 123.

[0057] Please continue to refer to Figure 2 , the furnace jacket 122 is further provided with a nitrogen inlet 1223 for inputting nitrogen, which can make the furnace body 121 close to an anaerobic atmosphere and prevent the reaction between oxygen and carbon monoxide from exploding.

[0058] Please continue to refer to Figure 2, the slag receiving bucket 123 includes a bucket body 1233 and a bottom wall 1234; the bucket body 1233 is in a cylindrical shape with openings at both ends. The top opening of the bucket body 1233 forms a bucket inlet 1231. During processing, it is convenient to connect the bucket inlet 1231 of the bucket body 1233 to the slag discharge port 1214 of the reduction furnace of the furnace body 121. The top diameter of the bucket body 1233 gradually increases from top to bottom. When the movable cover 124 is in the open position, there can be a gap between the peripheral edge of the movable cover 124 and the side wall of the bucket body 1233, which is convenient for carbon powder transportation. The bottom diameter of the bucket body 1233 gradually decreases from top to bottom. The bottom wall 1234 is connected to the lower opening of the bucket body 1233, and a bucket outlet 1232 is provided on the bottom wall 1234, which is convenient for carbon powder to gather around the bucket outlet 1232.

[0059] Please continue to refer to Figure 1 and Figure 2 , the reduction furnace gas inlets 1222 are provided in multiple numbers, and the multiple reduction furnace gas inlets 1222 are evenly distributed along the circumferential direction of the furnace jacket 122; the distillation furnace gas outlet 113 is provided in multiple numbers matching the reduction furnace gas inlets 1222. With the above structure, gaseous arsenic trioxide can be evenly input into the outer cavity 1221, and thus evenly input into the furnace body 121, and further come into uniform contact with the carbon powder.

[0060] Please refer to Figure 1 , and at the same time, please refer to Figure 2 . The device for continuously generating elemental arsenic further includes a crystallization tank 15, a condensation arsenic collection chamber 14, and a bag filter 16. The crystallization tank 15 includes a tank gas inlet 151 and a tank gas outlet 152; the tank gas inlet 151 is connected to the reduction furnace gas outlet 1212. The inlet of the condensation arsenic collection chamber 14 is connected to the tank gas outlet 152. The inlet of the bag filter 16 is connected to the outlet of the condensation arsenic collection chamber 14. Through the crystallization tank 15, gaseous elemental arsenic can be turned into a solid state, which is convenient for collection. Through the condensation arsenic collection chamber 14 and the bag filter 16, refined white arsenic can be collected and added to the refined white arsenic distillation furnace 11 again, improving the utilization rate of refined white arsenic.

[0061] The working process of the device for continuously generating elemental arsenic according to the preferred embodiment of the present utility model:

[0062] Move the movable cover 124 of the vertical carbon reduction furnace 12 to the blocking position, obtain carbon powder, fill the furnace body 121 with carbon powder through the carbon powder inlet 1211, and convey the carbon powder downward by rotating the spiral blade 125 to heat the carbon powder;

[0063] The refined white arsenic distillation furnace 11 obtains refined white arsenic powder, adds the refined white arsenic powder into the refined white arsenic distillation furnace 11 through the distillation furnace material inlet 111, heats the refined white arsenic powder, outputs gaseous arsenic trioxide through the distillation furnace gas outlet 113, and outputs arsenic-containing residue through the distillation furnace tail slag outlet 112;

[0064] The vertical carbon reduction furnace 12 obtains gaseous arsenic oxide, inputs the gaseous arsenic oxide into the outer cavity 1221 through the reduction furnace gas inlet 1222, and enters the furnace body 121 through the air inlet hole 1213, so that the gaseous arsenic oxide reacts with the carbon powder, and outputs the arsenic-containing gas through the reduction furnace gas outlet 1212;

[0065] Move the movable cover 124 of the vertical carbon reduction furnace 12 to the open position, output part of the carbon powder in the furnace body 121 through the reduction furnace slag outlet 1214, convey the reacted carbon powder downward by rotating the spiral blade 125, convey it to the slag receiving bucket 123 through the bucket inlet 1231, and output it through the bucket outlet 1232;

[0066] The refined white arsenic distillation furnace 11 obtains the reacted carbon powder and inputs it into the refined white arsenic distillation furnace 11 through the distillation furnace slag inlet 114;

[0067] The discharge heat exchanger 13 obtains the arsenic-containing residue and the reacted carbon powder, inputs them into the discharge heat exchanger 13 through the heat exchanger inlet 131, and outputs the cooled arsenic-containing residue and the reacted carbon powder through the heat exchanger outlet 132;

[0068] The crystallization tank 15 obtains the arsenic-containing gas, inputs it into the crystallization tank 15 through the tank gas inlet 151, obtains solid elemental arsenic, and outputs the waste gas through the tank gas outlet 152;

[0069] The condensation arsenic collection chamber 14 obtains the waste gas output from the tank gas outlet 152, collects the refined white arsenic and then outputs the waste gas;

[0070] The bag filter 16 obtains the waste gas output from the condensation arsenic collection chamber 14, collects the refined white arsenic and then outputs the waste gas.

[0071] In this way, the working process of the device for continuously generating elemental arsenic in this preferred embodiment is completed.

[0072] The device for continuously generating elemental arsenic of the present utility model, when in use, moves the movable cover to the blocking position, fills the furnace body with carbon powder through the carbon powder inlet, and heats the carbon powder; adds refined white arsenic powder into the refined white arsenic distillation furnace through the distillation furnace material inlet. The arsenic oxide in the refined white arsenic powder sublimes into a gaseous state at high temperature. After the gaseous arsenic oxide is output from the distillation furnace gas outlet, it is input into the outer cavity through the reduction furnace gas inlet, and then enters the furnace body through the air inlet holes. The gaseous arsenic oxide and the carbon powder react at high temperature to generate gaseous elemental arsenic and carbon monoxide. The arsenic-containing gas is output through the reduction furnace gas outlet located at the top of the furnace body; since the gaseous arsenic oxide flows from bottom to top in the furnace body, after reacting for a period of time, the carbon in the carbon powder at the bottom of the furnace body is consumed first. It is necessary to move the movable cover downward to the open position, so that part of the carbon powder in the furnace body is output from the reduction furnace slag outlet, and is input into the slag receiving bucket through the bucket inlet, and then continues to be conveyed downward through the gap between the movable cover and the side wall of the slag receiving bucket. After flowing out from the bucket outlet, it enters the refined white arsenic distillation furnace through the distillation furnace slag inlet, and is then output through the distillation furnace tail slag outlet, and is input into the discharge heat exchanger through the heat exchanger inlet. After the reacted carbon powder in the furnace body is discharged from the furnace body, the movable cover moves upward to the blocking position, and new carbon powder is continuously added to the furnace body through the carbon powder inlet. The movable cover moves back and forth between the blocking position and the open position; for the device for continuously generating elemental arsenic of the present utility model, the gaseous arsenic oxide preferentially reacts with the carbon powder located at the bottom of the furnace body. When the carbon powder at the bottom reacts completely, the movable cover moves to the open position to discharge the reacted carbon powder in the furnace body. At this time, the arsenic oxide gas can react with the carbon powder located at the top of the furnace body. After the reacted carbon powder is discharged from the furnace body, the movable cover moves to the blocking position to supplement new carbon powder. There can always be carbon powder in the furnace body, so the arsenic oxide gas can be continuously introduced into the furnace body, and the refined white arsenic distillation furnace can maintain a constant temperature and continuously generate gaseous arsenic oxide, effectively saving heat and effectively improving work efficiency.

[0073] In addition, the reacted carbon powder in the furnace body can be input into the refined white arsenic distillation furnace and can be input into the discharge heat exchanger together with the arsenic-containing tail slag, so that both the arsenic-containing tail slag and the reacted carbon powder can be cooled for easy stacking.

[0074] 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. An apparatus for continuously generating elemental arsenic, characterized in that, Comprising: A refined white arsenic distillation furnace, one end of which is provided with a distillation furnace material inlet, the bottom end of the other end is provided with a distillation furnace tail slag outlet, and the top end is provided with a distillation furnace gas outlet and a distillation furnace slag inlet; the distillation furnace material inlet is used for inputting refined white arsenic powder; the distillation furnace tail slag outlet is used for outputting arsenic-containing residues; the distillation furnace gas outlet is used for outputting gaseous arsenic oxide. A vertical carbon reduction furnace, which comprises a furnace body, a furnace jacket, a slag receiving bucket and a movable cover; the furnace body is provided with a carbon powder inlet, a reduction furnace gas outlet, air inlets and a reduction furnace slag outlet; the bottom end of the furnace body is open, and the top end is provided with a top wall, the carbon powder inlet is arranged on the top wall for inputting carbon powder; the reduction furnace gas outlet is arranged at the top end of the furnace body for outputting arsenic-containing gas; the air inlets are arranged on the peripheral side of the bottom end of the furnace body; the open bottom end of the furnace body forms the reduction furnace slag outlet; the furnace jacket is wrapped around the peripheral side of the bottom end of the furnace body and encloses an outer cavity with the furnace body, the air inlets are communicated with the outer cavity, the furnace jacket is provided with a reduction furnace gas inlet, and the reduction furnace gas inlet is connected with the distillation furnace gas outlet; the top end of the slag receiving bucket is provided with a bucket inlet and the bottom end is provided with a bucket outlet; the bucket inlet is connected to the reduction furnace slag outlet, the bucket outlet is connected to the distillation furnace slag inlet, and the bucket outlet is used for outputting reacted carbon powder; the movable cover is vertically movably arranged in the slag receiving bucket, and the movable cover includes a blocking position and an open position on its moving track. When the movable cover is in the blocking position, the movable cover blocks the connection between the bucket inlet and the reduction furnace slag outlet. When the movable cover is in the open position, the movable cover is located below the bucket inlet, and there is a gap between the movable cover and the side wall of the slag receiving bucket; and, A discharge heat exchanger, which is provided with a heat exchanger inlet and a heat exchanger outlet; the heat exchanger inlet is connected with the distillation furnace tail slag outlet; the heat exchanger outlet is used for outputting the cooled arsenic-containing residues.

2. The apparatus for continuously generating elemental arsenic according to claim 1, characterized in that, 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.

3. The apparatus for continuously generating elementary arsenic according to claim 2, wherein The vertical carbon reduction furnace further includes a connecting shaft, which penetrates through the furnace body, its axis is vertical, the connecting shaft is rotatably arranged around its own axis and movably arranged vertically, the bottom end of the connecting shaft is connected to the movable cover for driving the movable cover to move vertically, and the side wall of the connecting shaft is connected to the spiral blade for driving the spiral blade to rotate.

4. The apparatus for continuously generating elemental arsenic according to claim 2, wherein, The distance between the spiral blade and the side wall of the furnace body is 10 mm - 20 mm.

5. The apparatus for continuously generating elemental arsenic according to claim 1, wherein A plurality of exhaust holes are arranged on the movable cover.

6. The apparatus for continuously generating elementary arsenic according to claim 1, wherein The diameter of the bottom end of the furnace body gradually decreases from top to bottom.

7. The apparatus for continuously generating elemental arsenic according to claim 1, wherein The furnace jacket is further provided with a nitrogen inlet for inputting nitrogen.

8. The apparatus for continuously generating elemental arsenic according to claim 1, wherein The slag receiving bucket includes a bucket body and a bottom wall; the bucket body is in a cylindrical shape with both ends open, the top opening of the bucket body forms the bucket inlet, the top diameter of the bucket body gradually increases from top to bottom, and the bottom diameter of the bucket body gradually decreases from top to bottom; the bottom wall is connected to the lower opening of the bucket body, and the bucket outlet is arranged on the bottom wall.

9. The apparatus for continuously generating elemental arsenic according to claim 1, wherein The reducing furnace gas inlets are provided in plurality, and the plurality of reducing furnace gas inlets are evenly distributed along the circumferential direction of the furnace jacket; the distillation furnace gas outlets are provided in plurality to match the reducing furnace gas inlets.

10. The apparatus for continuously generating elementary arsenic according to claim 1, characterized in that, The device for continuously generating elemental arsenic further includes: a crystallization tank, which includes a tank gas inlet and a tank gas outlet; the tank gas inlet is connected to the reducing furnace gas outlet; a condensation arsenic collection chamber, whose inlet is connected to the tank gas outlet; and a bag filter, whose inlet is connected to the outlet of the condensation arsenic collection chamber.

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