Complete device for continuously preparing elemental arsenic

Abstract

The invention discloses a complete device for continuously preparing elemental arsenic, which comprises a tray conveying roller way and a tray returning roller way, the tray conveying roller way sequentially penetrates through a material distribution area, a high-temperature roasting area, a water jacket cooling area and an unloading area, the tray returning roller way is arranged between the unloading area and the material distribution area, a feeding front chamber and a material distributor are arranged in the material distribution area, and the material distributor is arranged in the material distribution area. A feeding bin door is mounted at an outlet of a first charging tray of the front feeding chamber, and a distributing device is mounted behind the feeding bin door; the high-temperature roasting area is provided with a high-temperature hearth and a settlement collecting chamber, a steam outlet of the high-temperature hearth is communicated with an inlet of the settlement collecting chamber, and a tray outlet is communicated with the water jacket cooling area; a cooling water jacket is mounted in the water jacket cooling area, and the tray conveying roller way penetrates through the cooling water jacket; the discharging area is provided with a discharging chamber, and the discharging chamber is provided with a second charging tray inlet communicated with the output end of the charging tray conveying roller way and a second charging tray outlet communicated with the input end of the charging tray returning roller way. According to the method, totally-closed and full-automatic preparation of the simple substance arsenic is realized, the direct yield is high, and the method is environment-friendly.

Description

Technical Field

[0001] The invention relates to a production technology for preparing elemental arsenic with a short process of arsenic alkali slag, and in particular to a complete set of equipment for continuously preparing elemental arsenic. Background Art

[0002] The traditional method of preparing elemental arsenic from arsenic-containing materials usually uses arsenic trioxide as a transitional form, and then goes through complex purification reactions to obtain elemental arsenic of higher purity. The traditional purification method is mainly to prepare elemental arsenic through carbothermal reduction. Carbon thermal reduction methods are divided into two categories: one is to mix arsenic trioxide with charcoal, heat and reduce it in a crucible or an electric furnace, and then condense and collect it. For example, Chinese patent CN92110735.8 adopts this process. This process has low direct yield, poor product quality, large raw material loss, serious environmental pollution, and large investment; the other is that arsenic trioxide is not mixed with charcoal, and the roasting furnace body is divided into two layers, the lower layer is covered with arsenic trioxide powder, and the upper layer is covered with charcoal. A resistance wire is installed on the outside of the furnace body for heating, and the upper and lower layers are heated separately, so that the arsenic trioxide vapor passes through the hot charcoal layer (the temperature of the charcoal layer is controlled at 750°C to 800°C) and is reduced to arsenic vapor. The arsenic vapor is condensed into a metallic arsenic product in the condenser on the upper part of the furnace body. For example, Chinese patent CN89101045.9 adopts this process. This type of process is simple and reliable, and has strong adaptability to raw materials, but there are problems such as serious corrosion of the furnace body, which needs to be replaced frequently, poor working environment, and high labor intensity. Summary of the invention

[0003] The technical problem to be solved by the present invention is that, in view of the problems that the furnace body is severely corroded when preparing elemental arsenic by carbon reduction method, needs to be frequently replaced, has a poor working environment and high labor intensity, the present invention provides a complete set of equipment for continuously preparing elemental arsenic with high degree of automation, high direct recovery rate, environmental friendliness, low labor intensity and low operating cost.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A complete set of equipment for continuously preparing elemental arsenic, comprising a tray conveying roller, a tray return roller, and a continuously arranged material distribution area, a high-temperature roasting area, a water jacket cooling area and a discharge area, wherein the tray conveying roller passes through the material distribution area, the high-temperature roasting area, the water jacket cooling area and the discharge area in sequence, and the tray return roller is arranged between the discharge area and the material distribution area, and is characterized in that:

[0006] The material distribution area is provided with a feeding front chamber and a distributor, a first lifting rod and a first tray installed at the bottom of the first lifting rod are installed in the feeding front chamber, a first material tray inlet and a first material tray outlet are provided in the feeding front chamber, the first material tray inlet is arranged opposite to the output end of the material tray return roller, the first material tray outlet is arranged opposite to the feeding bin door, a first push rod for pushing the material tray out of the feeding front chamber is installed on the feeding front chamber, the distributor is installed behind the feeding bin door, and a feeding valve is installed at the outlet of the distributor;

[0007] The high-temperature roasting zone is provided with a high-temperature furnace and a sedimentation collection chamber, the high-temperature furnace is provided with an arsenic vapor collection pipe and a material tray conveying channel, the sedimentation collection chamber includes a plurality of sedimentation boxes installed in sequence, the first sedimentation box is connected to the arsenic vapor collection pipe, the last sedimentation box is provided with a tail gas pipe, the plurality of sedimentation boxes are connected in sequence through a condenser to form a closed airflow channel, and a discharge port is provided at the bottom of each sedimentation box, and the discharge port is connected to a product collection container;

[0008] A cooling water jacket is installed in the water jacket cooling zone, and the tray conveying roller conveyor carries the tray through the high-temperature furnace and then enters the cooling water jacket;

[0009] The unloading area is provided with an unloading chamber, and a second material tray inlet connected with the output end of the material tray conveying roller and a second material tray outlet connected with the material tray return roller are provided on the unloading chamber. A material tray turning space is provided in the unloading chamber, and a second tray for receiving the material tray is installed in the material tray turning space. A clamping mechanism for clamping the second tray and the material tray as a whole is installed on the second tray. The middle part of the second tray is fixedly connected to the gear shaft of the turning gear, and the turning gear is meshed with a transmission gear, and the transmission gear is connected to a transmission mechanism. When the transmission mechanism drives the transmission gear, the transmission gear rotates with the turning gear and the turning tray to a slag unloading angle, and a slag unloading port is provided at the bottom of the material tray turning space.

[0010] The complete set of equipment for continuously preparing elemental arsenic of the present invention is designed based on the characteristics of the raw material pyroarsenate: it can be decomposed into metal arsenate (MeAsO4) at a temperature above 200°C, first generates As4O6 vapor under the action of reducing carbon powder, and is further reduced to As / As2 / As3 / As4 vapor. In addition, the feeding and slag discharge of the device of the present invention can be automatically controlled, the entire arsenic preparation process is fully closed, and no one contacts the arsenic-containing material. It has the advantages of high degree of automation, high direct recovery rate, environmental friendliness, low labor intensity, low operating cost, etc.

[0011] The present invention utilizes a material tray to load materials, thereby avoiding direct contact between the materials and the furnace body, reducing corrosion of the furnace body, avoiding frequent replacement of the furnace body, and reducing the operating cost of the furnace body.

[0012] The present invention provides a plurality of settling boxes, and sequentially connects the plurality of settling boxes through condensing pipes to form a closed air flow channel, so that the arsenic vapor can be cooled and crystallized in the closed air flow channel, thereby avoiding leakage of the arsenic vapor and ensuring the condensation efficiency and cooling speed of the arsenic vapor, which is beneficial to the continuous and stable operation of the arsenic collection operation.

[0013] The present invention fixes the gear shaft of the flipping gear in the middle of the second tray, and the flipping gear meshes with the transmission gear, and the transmission gear is connected to the transmission mechanism, so that when the transmission mechanism drives the transmission gear, the transmission gear rotates with the flipping gear and the second tray to the slag unloading angle. During the flipping process of the second tray, due to the use of a more stable and reliable gear transmission, the flipping of the material tray of the present invention is more stable and reliable, and a certain flipping speed can be maintained as required to achieve continuous slag unloading.

[0014] Preferably, the transmission gear is a rack, and the transmission mechanism is a hydraulic pull rod.

[0015] Preferably, the clamping mechanism includes a cylinder, a second push rod installed at the actuating end of the cylinder, and a baffle rod installed on the second pallet, one end of the baffle rod is hinged to the second pallet, and the other end is provided with a strip hole, the middle part of the second push rod is connected to the actuating end of the cylinder, and the end of the second push rod is placed in the strip hole, when the actuating end of the cylinder is extended, the second push rod pushes the baffle rod to rotate toward the upper side of the second pallet, so that the baffle rod extends out of the second pallet, when the actuating end of the cylinder retracts, the second push rod retracts together, and the second push rod simultaneously drives the baffle rod to rotate toward the bottom of the second pallet until the baffle rod is finally flush with or lower than the second pallet.

[0016] Preferably, a tray lifting space is set in the unloading chamber, and a third pallet is installed in the tray lifting space, the third pallet is connected to the second lifting rod, the second lifting rod drives the third pallet, so that the third pallet has a material receiving position and a transfer position, the material receiving position is connected to the second tray inlet, and the transfer position is connected to the unturned second tray, and a third push rod is installed on the unloading chamber to push the tray at the transfer position onto the second pallet.

[0017] Preferably, the front two sedimentation tanks are directly connected to form a whole, and the rear sedimentation tanks are connected in sequence through condensation pipes, so that the arsenic vapor can be deposited in the front two sedimentation tanks as much as possible to increase the arsenic collection efficiency.

[0018] Preferably, each of the settling boxes is respectively equipped with an air hammer so as to vibrate the elemental arsenic adhering to the inner wall of the settling box to the slag discharge port.

[0019] Preferably, a discharge valve is installed on the discharge port, and the discharge valve is a pneumatic discharge valve.

[0020] Preferably, a wet electrostatic precipitator is installed on the tail gas pipe, so that the unsettled arsenic vapor can enter the wet electrostatic precipitator through the tail gas pipe for dust removal before being discharged in compliance with the emission standards.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention connects the continuously arranged material distribution area, high-temperature roasting area, water jacket cooling area and unloading area through the tray conveying roller and the tray return roller, realizing a fully enclosed elemental arsenic production line, and the feeding and slag discharge can all be automatically controlled. No one contacts the arsenic-containing materials during the entire production process. It has the advantages of high degree of automation, high direct recovery rate, environmental friendliness, low labor intensity, low operating cost, etc.

[0023] 2. The present invention realizes cooling of arsenic vapor through a condenser, thereby increasing the cooling area, improving the cooling efficiency, and further increasing the arsenic collection efficiency.

[0024] 3. The collection of elemental arsenic in the present invention is achieved by cooling crystallization in a closed air flow channel, thereby avoiding leakage of arsenic vapor and facilitating continuous and stable operation of the arsenic collection operation.

[0025] 4. When the present invention is unloading slag, the turning of the material tray is achieved through gear transmission, which makes the turning action more stable and reliable, and can also maintain a certain turning speed as needed to achieve continuous automatic unloading.

[0026] 5. The slag unloading of the present invention is carried out in a closed unloading chamber, and the turning speed of the material tray is stable, so that the dust is small during the slag unloading and is basically closed in the unloading chamber, which will not cause pollution to the external environment and humans. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the structure of a complete set of equipment for continuously preparing elemental arsenic according to the present invention.

[0029] Figure 2 It is a schematic diagram of the structure of the sedimentation collection chamber of the present invention.

[0030] Figure 3 It is a schematic diagram of the overall structure of the unloading chamber of the present invention.

[0031] Figure 4It is a schematic structural diagram of the turning mechanism and the clamping mechanism of the discharge chamber of the present invention.

[0032] Figure 5 for Figure 4 Top view of the . DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figure 1 , Figure 2 , an embodiment of the complete set of equipment for continuously preparing elemental arsenic of the present invention comprises a tray conveyor roller 16, a tray return roller 14, and a continuously arranged distribution area, a high-temperature roasting area, a water jacket cooling area, and a discharge area. The input end of the tray conveyor roller 16 is connected to the distribution area, and then passes through the high-temperature roasting area and the water jacket cooling area in sequence, and finally the output end of the tray conveyor roller 16 is connected to the discharge area. The tray return roller 14 is arranged between the discharge area and the distribution area, that is, the input end of the tray return roller 14 is connected to the discharge area, and the output end is connected to the distribution area.

[0037] The feeding front chamber 2 and the distributor 5 are arranged in the feeding front chamber 2. The first lifting rod 3 and the first tray (not shown) connected to the bottom of the first lifting rod 3 are installed in the feeding front chamber 2. The feeding front chamber 2 is provided with a first tray inlet and a first tray outlet. The first tray inlet is arranged opposite to the output end of the tray return roller 14, and the first tray outlet is arranged opposite to the input end of the tray conveying roller 16. The input end of the tray conveying roller 16 is provided with a feeding bin door 4. The feeding front chamber 2 is also provided with a first push rod 1 for pushing the tray out of the feeding front chamber 2. The distributor 5 is installed on the tray conveying roller 16 behind the feeding bin door 4, and a material level meter 6 is installed on the distributor 5, and a feeding valve 7 is installed at its outlet.

[0038] The high temperature roasting zone is provided with a high temperature furnace 8 and a sedimentation collection chamber 15. An arsenic vapor collection pipe 9 is provided at the top of the high temperature furnace 8, and a tray conveying channel is provided in the high temperature furnace 8. The tray conveying roller 16 carries the tray through the tray conveying channel. The sedimentation collection chamber 15 includes a plurality of sedimentation boxes 151 sequentially installed on a support frame 158. The top of the first sedimentation box is connected to the arsenic vapor collection pipe 9, and the top of the last sedimentation box is installed with a tail gas pipe 152. The first two sedimentation boxes 151 are connected to form a whole. The rear sedimentation boxes 151 are separated from each other by a partition 153, and are sequentially connected through a condenser 154 to form a closed air flow channel. A discharge port is provided at the bottom of each sedimentation box 151, and a discharge valve 155 is installed on the discharge port. A product collection container 156 is installed at the outlet of the discharge valve 155. The discharge valve 155 preferably adopts a pneumatic discharge valve. A pneumatic hammer 157 is installed on each of the settling boxes 151 to vibrate the elemental arsenic on the inner wall of the settling box to the discharge port. A wet electrostatic precipitator is installed on the tail gas pipe 152 to pass the unsettled arsenic vapor into the wet electrostatic precipitator through the tail gas pipe for dust removal before being discharged in compliance with the standards.

[0039] The water jacket cooling zone is provided with a cooling water jacket 10. The tray conveying roller 16 carries the tray through the high-temperature furnace 8 and then continues to pass through the cooling water jacket 10 to cool the slag.

[0040] The unloading area is provided with a unloading chamber 11. A tray turning space 111 and a tray lifting space 112 are provided in the unloading chamber 11. A second tray inlet 113 connected to the output end of the tray conveying roller 16 is provided at the upper part of the tray lifting space 112, and a second tray outlet 114 provided on the tray turning space 111 is directly opposite to the lower part of the tray lifting space 112, and the second tray outlet 114 is connected to the input end of the tray return roller 14. A slag discharge port 115 is provided at the bottom of the tray turning space 111.

[0041] A second tray 116 for receiving the tray is installed in the tray turning space 111, and a clamping mechanism for clamping the second tray 116 and the tray together is provided on the second tray 116. The middle of the second tray 116 is fixedly connected to the gear shaft of the turning gear 117, and the turning gear 117 is meshed with the transmission gear 118, and the transmission gear 118 is connected to the transmission mechanism 119. When the transmission mechanism 119 drives the transmission gear 118, the transmission gear 118 rotates with the turning gear 117 and the second tray 116.

[0042] In this embodiment, the transmission gear 118 is a rack, and the transmission mechanism 119 is a hydraulic flip pull rod. Obviously, the transmission gear 118 of the present invention can also be a conventional gear, and the transmission mechanism 119 can be any driving mechanism that can drive the transmission gear 118.

[0043] The clamping mechanism includes a cylinder 120, a second push rod 121 installed at the actuating end of the cylinder, and a baffle 122 installed at the end of the second pallet 116, one end of the baffle 122 is hinged to the second pallet 116, and the other end is provided with a strip hole, the middle part of the second push rod 121 is connected to the actuating end of the cylinder 120, and the end of the second push rod 121 is placed in the strip hole, when the actuating end of the cylinder is extended, the second push rod 121 pushes the baffle 122 to rotate toward the upper side of the second pallet 116, so that the baffle 122 extends out of the second pallet 116 and thus can prevent the material tray on the second pallet 116 from sliding off during the flipping process, when the actuating end of the cylinder retracts, it retracts with the second push rod 121, and the second push rod 121 simultaneously drives the baffle 122 to rotate toward the bottom of the second pallet 116, and finally is flush with or lower than the second pallet 116 to avoid preventing the material tray from entering the second pallet 116.

[0044] A third pallet 123 is installed in the material tray lifting space 112, and the third pallet 123 is connected to the second lifting rod 12. The second lifting rod 12 drives the third pallet 123 so that the third pallet 123 has a material receiving position and a transfer position. The material receiving position is connected to the second material tray inlet 113, and the transfer position is connected to the second pallet 116 that has not been flipped over.

[0045] The unloading chamber 11 is also provided with a third push rod 13 for pushing the material tray at the transfer position onto the second tray 116 , and the pushing direction of the third push rod 13 is directly facing the second material tray outlet 114 .

[0046] When the complete set of equipment for continuously preparing elemental arsenic of the present invention is used, the raw materials and carbon powder are first mixed in a certain proportion (hereinafter referred to as materials) and then put into the distributor 5. Then, the automatic operation program of the device of the present invention is started, and the first lifting rod 3 lifts the material boat in the first tray to the first tray outlet at the top, and the second lifting rod 12 lifts the third tray 123 in the discharge chamber 11 to the second tray inlet 113 at the top, and then the feed bin door 4 is opened, and the first push rod 1 pushes the material boat in the first tray in the feed front chamber 2 to the bottom of the distributor 5 and then returns, and then the feed bin door 4 is closed, and the first lifting rod 3 lowers the first tray to the first tray inlet at the bottom, ready to receive the empty tray conveyed by the tray return roller 14. Open the pneumatic feed valve 7 to discharge the material in the distributor 5 into the material boat at a uniform speed (in this process, the amount of material in the distributor 5 can be accurately known through the level meter 6); the material boat after distributing the material is pushed by the rear material boat (in production, the material trays are discharged one by one, and the rear material trays will give thrust to the front material trays and thus promote the material trays to move forward) into the high-temperature furnace 8 for high-temperature roasting, and the generated arsenic vapor enters the sedimentation collection chamber 15 through the arsenic vapor collection pipe 9. The calcined slag in the boat after the reaction in the high-temperature furnace 8 finally enters the cooling water jacket 10 for cooling through the continuous pushing of the rear boat, and finally enters the unloading chamber 11 through the continuous pushing of the rear boat in the cooling zone and is lifted to the third tray 123 at the top by the second lifting rod 12; then the third tray 123 drops to the bottom and the third push rod 13 pushes the boat in the third tray 123 to the second tray 116 for unloading and flipping and returns; after the second tray 116 flips over and unloads, the third push rod 13 pushes the boat in the second tray 116 to the boat return roller 14 and returns, and the boat returns to the first tray at the bottom of the feeding front chamber 2 via the boat return roller 14, that is, the boat returns to the distribution area through the boat return roller 14 to complete a cycle.

[0047] The arsenic vapor generated by high-temperature reduction roasting enters the closed airflow channel formed by the sedimentation box 151 through the arsenic vapor collecting pipe 9. The high-temperature arsenic vapor is rapidly cooled and condensed into a solid state in the entire closed airflow channel (settling box 151) under the condensation action of the condenser 154. Most of the arsenic vapor entering through the arsenic vapor collecting pipe 9 is settled and collected in the first two sedimentation boxes 151, and a small part is collected in the rear sedimentation box 151. In this process, due to the installation of the condenser 154, the cooling area is increased, the cooling efficiency is improved, and the purpose of efficiently collecting elemental arsenic is achieved. A very small part of the arsenic vapor that has not settled in the sedimentation box 151 enters the wet electrostatic precipitator through the tail pipe 152 for dust removal and then meets the emission standards. The elemental arsenic collected in the sedimentation box 151 will stick to the inner wall of the sedimentation box 151, and can be vibrated to the discharge port by opening the air hammer 157 installed on the sedimentation box 151; the elemental arsenic collected in the sedimentation box 151 is discharged into the product collection closed container 156 by opening the pneumatic discharge valve 155, ultimately achieving the purpose of safely and efficiently collecting elemental arsenic.

[0048] When unloading and flipping, first the second lifting rod 12 pulls the third tray 123 to the receiving position and faces the second tray inlet 113. The tray cooled in the cooling zone is pushed into the third tray 123 under the thrust of the rear tray. Then the second lifting rod 12 lowers the third tray 123 to the transfer position. Then the third push rod 13 pushes the tray in the third tray 123 into the second tray 116 for flipping and unloading. Then the tray blocking rod 122 is popped out to block the material boat on the second tray 116 by starting the clamping mechanism. Then the third push rod 13 returns to its original position. Then, the transmission mechanism 119 (hydraulic flip pull rod) ) starts to start, the transmission gear 118 runs, and the flip gear 117 rotates accordingly, and then pulls the second tray 116 connected to it to the slag unloading angle, the slag is separated from the material tray, and the slag is poured into the discharge port 115; finally, the transmission mechanism 119 (hydraulic flip pull rod) returns to its original position, and at the same time, the tray blocking rod 122 is recovered to its original position under the action of the clamping mechanism, and the third push rod 13 is started again to push the material tray in the second tray 116 to the second material tray outlet 114 and enter the material tray return roller 14, and then the third push rod 13 returns to its original position to complete one slag unloading, and this is repeated to complete continuous slag unloading. It can be seen that the entire slag unloading process of the present invention is carried out in a fully enclosed unloading chamber 11, which reduces dust emission and protects the environment.

[0049] The above is only a specific implementation scheme of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the art can make many possible changes and modifications to the technical scheme of the present invention by using the technical content disclosed above without departing from the scope of the technical scheme of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical scheme of the present invention should fall within the protection scope of the technical scheme of the present invention.

Claims

1. A complete set of equipment for continuously preparing elemental arsenic, comprising a tray conveyor roller, a tray return roller, and a continuously arranged material distribution area, a high-temperature roasting area, a water jacket cooling area and a discharge area, wherein the tray conveyor roller sequentially passes through the material distribution area, the high-temperature roasting area, the water jacket cooling area and the discharge area, and the tray return roller is arranged between the discharge area and the material distribution area, characterized in that: A feeding front chamber and a distributor are arranged in the material distribution area, a first lifting rod and a first tray installed at the bottom of the first lifting rod are installed in the feeding front chamber, a first material tray inlet and a first material tray outlet are arranged in the feeding front chamber, the first material tray inlet is arranged opposite to the output end of the material tray return roller, the first material tray outlet is arranged opposite to the feeding bin door, a first push rod for pushing the material tray out of the feeding front chamber is installed on the feeding front chamber, the distributor is installed behind the feeding bin door, and a feeding valve is installed at the outlet of the distributor; The high-temperature roasting zone is provided with a high-temperature furnace and a sedimentation collection chamber, the high-temperature furnace is provided with an arsenic vapor collection pipe and a material tray conveying channel, the sedimentation collection chamber includes a plurality of sedimentation boxes installed in sequence, the first sedimentation box is connected to the arsenic vapor collection pipe, the last sedimentation box is provided with a tail gas pipe, the plurality of sedimentation boxes are connected in sequence through a condenser to form a closed airflow channel, and a discharge port is provided at the bottom of each sedimentation box, and the discharge port is connected to a product collection container; A cooling water jacket is installed in the water jacket cooling zone, and the tray conveying roller conveyor carries the tray through the high-temperature furnace and then enters the cooling water jacket; The unloading area is provided with an unloading chamber, and a second material tray inlet connected with the output end of the material tray conveying roller and a second material tray outlet connected with the material tray return roller are provided on the unloading chamber. A material tray turning space is provided in the unloading chamber, and a second tray for receiving the material tray is installed in the material tray turning space. A clamping mechanism for clamping the second tray and the material tray as a whole is installed on the second tray. The middle part of the second tray is fixedly connected to the gear shaft of the turning gear, and the turning gear is meshed with a transmission gear, and the transmission gear is connected to a transmission mechanism. When the transmission mechanism drives the transmission gear, the transmission gear rotates with the turning gear and the turning tray to a slag unloading angle, and a slag unloading port is provided at the bottom of the material tray turning space.

2. The complete set of equipment for continuously preparing elemental arsenic according to claim 1, characterized in that: The transmission gear is a rack, and the transmission mechanism is a hydraulic pull rod.

3. The complete set of equipment for continuously preparing elemental arsenic according to claim 1, characterized in that: The clamping mechanism includes a cylinder, a second push rod installed at the actuating end of the cylinder, and a baffle rod installed on the second pallet, one end of the baffle rod is hinged to the second pallet, and the other end is provided with a strip hole, the middle part of the second push rod is connected to the actuating end of the cylinder, and the end of the second push rod is placed in the strip hole, when the actuating end of the cylinder is extended, the second push rod pushes the baffle rod to rotate toward the upper side of the second pallet, so that the baffle rod extends out of the second pallet, when the actuating end of the cylinder retracts, the second push rod retracts together, and the second push rod simultaneously drives the baffle rod to rotate toward the bottom of the second pallet until the baffle rod is finally flush with or lower than the second pallet.

4. The complete set of equipment for continuously preparing elemental arsenic according to claim 1, characterized in that: A tray lifting space is set in the unloading chamber, and a third pallet is installed in the tray lifting space. The third pallet is connected to the second lifting rod, and the second lifting rod drives the third pallet so that the third pallet has a material receiving position and a transfer position. The material receiving position is connected to the inlet of the second tray, and the transfer position is connected to the unturned second tray. A third push rod for pushing the tray at the transfer position onto the second tray is installed on the unloading chamber.

5. The complete set of equipment for continuously preparing elemental arsenic according to claim 1, characterized in that: The front two sedimentation tanks are directly connected into one, and the rear sedimentation tanks are connected in sequence through condensation pipes.

6. The complete set of equipment for continuously preparing elemental arsenic according to claim 1, characterized in that: A pneumatic hammer is installed on each of the settlement boxes.

7. The complete set of equipment for continuously preparing elemental arsenic according to claim 1, characterized in that: A discharge valve is installed on the discharge port, and the discharge valve is a pneumatic discharge valve.

8. The complete set of equipment for continuously preparing elemental arsenic according to claim 1, characterized in that: A wet electrostatic precipitator is installed on the tail gas pipe.

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