A complete device for continuously preparing elemental arsenic

Abstract

The application discloses a complete set of device for continuously preparing elemental arsenic, which comprises a material disc conveying roller way and a material disc returning roller way, the material disc conveying roller way sequentially passes through a material distribution area, a high-temperature roasting area, a water jacket cooling area and a discharging area, the material disc returning roller way is arranged between the discharging area and the material distribution area, a feeding pre-chamber and a material distributor are arranged in the material distribution area, a feeding bin door is arranged on a first material disc outlet of the feeding pre-chamber, and the material distributor is arranged behind the feeding bin door; the high-temperature roasting area is provided with a high-temperature furnace chamber and a settling collection chamber, a steam outlet of the high-temperature furnace chamber is communicated with an inlet of the settling collection chamber, and a material disc outlet is communicated with the water jacket cooling area; the water jacket cooling area is provided with a cooling water jacket, and the material disc conveying roller way passes through the cooling water jacket; the discharging area is provided with a discharging chamber, a second material disc inlet communicated with an output end of the material disc conveying roller way and a second material disc outlet communicated with an input end of the material disc returning roller way are arranged on the discharging chamber. The application realizes the fully-closed and fully-automatic preparation of the elemental arsenic, and has high direct yield and environmental friendliness.

Description

TECHNICAL FIELD

[0001] The present application relates to a short process for preparing elemental arsenic from arsenic alkali residue, in particular to a complete set of devices for continuously preparing elemental arsenic. BACKGROUND

[0002] In the conventional preparation of elemental arsenic from arsenic-containing materials, arsenic trioxide is usually used as an intermediate form, and high-purity elemental arsenic can only be obtained through complex purification reactions. The traditional purification method is carbon thermal reduction method. Carbon thermal reduction method can be divided into two categories: one is to mix arsenic trioxide with carbon, heat and reduce in a crucible or electric furnace, and then collect by condensation. For example, Chinese patent CN92110735.8 uses this process. This process has low direct yield, poor product quality, large raw material loss, serious environmental pollution, and high investment. The other is to divide the roasting furnace body into two layers, with arsenic trioxide powder in the lower layer and carbon in the upper layer. An electric resistance wire is installed outside the furnace body, and the upper and lower layers are heated separately. Arsenic trioxide vapor is reduced to arsenic vapor by passing through the hot carbon layer (carbon layer temperature controlled at 750-800℃), and the arsenic vapor is condensed into metallic arsenic product in the condenser at the upper part of the furnace body. For example, Chinese patent CN89101045.9 uses this process. This type of process is simple and reliable, and has strong adaptability to raw materials. However, it has problems such as severe furnace body corrosion, frequent replacement, poor working environment, and high labor intensity. SUMMARY

[0003] The present application provides a complete set of devices for continuously preparing elemental arsenic, which has high automation, high direct yield, environmental friendliness, low labor intensity, and low operating cost.

[0004] To solve the above technical problems, the present application adopts the following technical solutions:

[0005] A complete set of devices for continuously preparing elemental arsenic, comprising a tray conveying roller, a tray returning roller, and a continuously arranged material distribution area, a high-temperature roasting area, a water jacket cooling area, and a discharge area. 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. The tray returning roller is arranged between the discharge area and the material distribution area, characterized in that:

[0006] A feeding front chamber and a distributor are provided in the feeding front chamber, 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, and the last sedimentation box is provided with a tail gas pipe. The plurality of sedimentation boxes are connected in sequence through a condenser pipe 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 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 communicated with the output end of the material tray conveying roller and a second material tray outlet communicated 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 into one is installed on the second tray, and 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 the transmission gear, and the transmission gear is connected to the transmission mechanism. When the transmission mechanism drives the transmission gear, the transmission gear rotates with the turning gear and the turning tray to the slag unloading angle, and a slag unloading port is provided at the bottom of the material tray turning space.

[0010] The complete device 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 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 enclosed 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 application sets multiple settling boxes, and connects the multiple settling boxes in sequence through the condensing pipes to form a closed airflow channel, so that the arsenic vapor can be cooled and crystallized in the closed airflow channel, avoiding arsenic vapor leakage, and ensuring the arsenic vapor condensing efficiency and cooling speed, which is beneficial to the continuous and stable operation of arsenic collection operation.

[0013] The gear shaft of the turnover gear is fixedly connected to the middle part of the second tray, and the turnover gear is engaged with a transmission gear connected with a transmission mechanism, so that when the transmission mechanism drives the transmission gear, the transmission gear rotates with the turnover gear and the second tray to the slag discharging angle.

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

[0015] Preferably, the clamping mechanism comprises a cylinder, a second push rod installed on the actuating end of the cylinder, and a blocking rod installed on the second tray, one end of the blocking rod being hingedly connected to the second tray and the other end being provided with a strip-shaped hole, the middle part of the second push rod being connected to the actuating end of the cylinder, and the end part of the second push rod being arranged in the strip-shaped hole, when the actuating end of the cylinder extends, the second push rod drives the blocking rod to rotate to the upper side of the second tray, so that the blocking rod extends out of the second tray, and when the actuating end of the cylinder retracts, the second push rod retracts together, and the second push rod drives the blocking rod to rotate to the lower side of the second tray until the blocking rod is flush with or lower than the second tray.

[0016] Preferably, a tray lifting space is arranged in the discharging chamber, a third tray is installed in the tray lifting space, the third tray is connected with a second lifting rod, the second lifting rod drives the third tray to have a material receiving position and a transfer position, the material receiving position is in butt joint with the second tray inlet, and the transfer position is in butt joint with the second tray which has not been turned over, and a third push rod is installed on the discharging chamber to push the tray in the transfer position to the second tray.

[0017] Preferably, the front two settling boxes are directly connected into one body, and the rear settling boxes are connected in sequence through the condensing pipes, so that the arsenic vapor can be deposited in the front two settling boxes as much as possible, and the arsenic collection efficiency is increased.

[0018] Preferably, an air hammer is installed on each of the settling boxes to shake the elemental arsenic adhered to the inner wall of the settling box to the slag discharging port.

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

[0020] Preferably, a wet electrostatic precipitator is installed on the tail gas pipe to discharge the un-settled arsenic vapor through the tail gas pipe into the wet electrostatic precipitator for dust removal to meet the discharge standard.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] 1. The present application connects the continuously arranged cloth area, high-temperature roasting area, water jacket cooling area and discharging area through the tray conveying roller and the tray returning roller, realizes the full-closed elemental arsenic production line, and the feeding and discharging can be automatically controlled, no one contacts the arsenic-containing material in the whole production process, and the present application has the advantages of high automation degree, high direct yield, environmental friendliness, low labor intensity and low operation cost.

[0023] 2. The present application realizes the cooling of arsenic vapor through the condensing pipe, increases the cooling area, improves the cooling efficiency, and further increases the arsenic collection efficiency.

[0024] 3. The collection of elemental arsenic in the present application is realized through cooling crystallization in the closed airflow channel, which avoids the leakage of arsenic vapor and is conducive to the continuous and stable operation of the arsenic collection operation.

[0025] 4. When discharging the slag, the tray overturning is realized through gear transmission, so that the overturning action is more stable and reliable, and a certain overturning speed can be maintained according to the need to realize continuous automatic discharging.

[0026] 5. The discharging of the present application is carried out in a closed discharging chamber, and the tray overturning speed is stable, so that the dust is small when discharging the slag and is basically enclosed in the discharging chamber, which will not pollute the external environment and human beings. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 It is a structure schematic view of the complete device for continuously preparing elemental arsenic of the present application.

[0029] Figure 2 It is a structure schematic view of the settling and collecting chamber of the present application.

[0030] Figure 3 It is a whole structure schematic view of the discharging chamber of the present application.

[0031] Figure 4The figure is a structure diagram of the overturning mechanism and the clamping mechanism of the discharge chamber of the application.

[0032] Figure 5 The figure is a top view of the discharge chamber. Figure 4 DETAILED DESCRIPTION

[0033] The application will be further described in connection with specific preferred embodiments, but the scope of protection of the application is not limited by the specific embodiments.

[0034] In the description of the application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0036] Please refer to Figure 1 , Figure 2 The embodiment of the complete set of devices for continuously preparing elemental arsenic includes a tray conveying roller 16, a tray returning roller 14 and a continuously arranged material distribution area, a high-temperature roasting area, a water jacket cooling area and a discharge area. The input end of the tray conveying roller 16 is connected to the material distribution area, then passes through the high-temperature roasting area and the water jacket cooling area in sequence, and finally the output end of the tray conveying roller 16 is connected to the discharge area. The tray returning roller 14 is arranged between the discharge area and the material distribution area, that is, the input end of the tray returning roller 14 is connected to the discharge area, and the output end is connected to the material distribution area.

[0037] ​The material distribution area is provided with a pre-feeding chamber 2 and a distributor 5. The pre-feeding chamber 2 is provided with a first lifting rod 3 and a first tray (not shown in the figure) connected to the bottom of the first lifting rod 3. The pre-feeding 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 way 14, and the first tray outlet is arranged opposite to the input end of the tray conveying roller way 16. The input end of the tray conveying roller way 16 is provided with a feeding bin door 4. The pre-feeding chamber 2 is further provided with a first push rod 1 for pushing the tray out of the pre-feeding chamber 2. The distributor 5 is arranged above the tray conveying roller way 16 behind the feeding bin door 4. The distributor 5 is provided with a material level meter 6, and the discharge outlet of the distributor 5 is provided with a feeding valve 7.

[0038] The high-temperature roasting area is provided with a high-temperature furnace 8 and a settling collection chamber 15. The top of the high-temperature furnace 8 is provided with an arsenic vapor collection pipe 9. The high-temperature furnace 8 is provided with a tray conveying passage, and the tray conveying roller way 16 passes through the tray conveying passage. The settling collection chamber 15 includes a plurality of settling boxes 151 arranged in sequence on a support frame 158. The top of the first settling box is communicated with the arsenic vapor collection pipe 9, and the top of the last settling box is provided with a tail gas pipe 152. The front two settling boxes 151 are communicated as a whole, and the rear settling boxes 151 are separated from each other by a partition 153 and are sequentially communicated by a condensing pipe 154 to form a closed air flow passage. The bottom of each settling box 151 is provided with a discharge port, and the discharge port is provided with a discharge valve 155. The outlet of the discharge valve 155 is provided with a product collection container 156. The discharge valve 155 is preferably a pneumatic discharge valve. Each of the settling boxes 151 is provided with a pneumatic hammer 157 to shake the elemental arsenic adhered to the inner wall of the settling box to the discharge port. The tail gas pipe 152 is provided with a wet electrostatic precipitator to discharge the un-settled arsenic vapor through the tail gas pipe into the wet electrostatic precipitator for dust removal.

[0039] The water jacket cooling area is provided with a cooling water jacket 10. After passing through the high-temperature furnace 8, the tray conveying roller way 16 continues to pass through the cooling water jacket 10 to cool the slag.

[0040] The discharging area is provided with a discharging chamber 11. The discharging chamber 11 is provided with a tray overturning space 111 and a tray lifting space 112. The upper part of the tray lifting space 112 is provided with a second tray inlet 113 communicated with the output end of the tray conveying roller way 16. The lower part of the tray lifting space 112 is provided with a second tray outlet 114 opposite to the second tray outlet 114 arranged on the tray overturning space 111, and the second tray outlet 114 is communicated with the input end of the tray return roller way 14. The bottom of the tray overturning space 111 is provided with a slag discharge port 115.

[0041] The second tray 116 is installed in the tray turnover space 111 for receiving the tray, and a clamping mechanism is arranged on the second tray 116 for clamping the second tray 116 and the tray as a whole. The middle part of the second tray 116 is fixedly connected with the gear shaft of a turnover gear 117, and the turnover gear 117 is engaged with a transmission gear 118, which is connected with a transmission mechanism 119. When the transmission mechanism 119 drives the transmission gear 118, the transmission gear 118 rotates with the turnover gear 117 and the second tray 116.

[0042] In the embodiment, the transmission gear 118 is a rack, and the transmission mechanism 119 is a hydraulic turnover pull rod. Obviously, the transmission gear 118 of the present application can also be a conventional gear, and the transmission mechanism 119 can be any driving mechanism capable of driving the transmission gear 118.

[0043] The clamping mechanism comprises a cylinder 120, a second push rod 121 installed on the actuating end of the cylinder, and a stop rod 122 installed on the end of the second tray 116. One end of the stop rod 122 is hinged to the second tray 116, and the other end is provided with a strip-shaped hole. The middle part of the second push rod 121 is connected with the actuating end of the cylinder 120, and the end part of the second push rod 121 is placed in the strip-shaped hole. When the actuating end of the cylinder extends, the second push rod 121 pushes the stop rod 122 to rotate to the upper side of the second tray 116, so that the stop rod 122 extends out of the second tray 116 and can prevent the tray on the second tray 116 from falling during the turnover process. When the actuating end of the cylinder retracts, the second push rod 121 retracts together with the second push rod 121, and the second push rod 121 drives the stop rod 122 to rotate to the lower side of the second tray 116 at the same time, so that the stop rod 122 is finally flush with or lower than the second tray 116, so as to avoid preventing the tray from entering the second tray 116.

[0044] The third tray 123 is installed in the tray lifting space 112, and the second lifting rod 12 is connected with the third tray 123. The second lifting rod 12 drives the third tray 123, so that the third tray 123 has a receiving position and a transfer position. The receiving position is in butt joint with the second tray inlet 113, and the transfer position is in butt joint with the second tray 116 which has not been turned over.

[0045] The unloading chamber 11 is also provided with a third push rod 13 for pushing the tray in the transfer position to the second tray 116. The pushing direction of the third push rod 13 is directly opposite to the second tray outlet 114.

[0046] The complete device for continuously preparing elemental arsenic uses the following method. First, the raw material is mixed with carbon powder in a certain proportion (hereinafter referred to as material) and fed into the distributor 5. Then, the automatic operation program of the device is started. The first lifting rod 3 lifts the boat in the first tray to the first tray outlet at the top, the second lifting rod 12 lifts the third tray 123 in the discharge chamber 11 to the second tray inlet 113 at the top, then the feed bin door 4 is opened, the first push rod 1 pushes the boat in the first tray in the pre-feeding chamber 2 to the position directly below the distributor 5 and returns, then the feed bin door 4 is closed, the first lifting rod 3 lowers the first tray to the first tray inlet at the bottom, ready to receive the empty tray transported by the tray return roller 14. The pneumatic feeding valve 7 is opened to uniformly feed the material in the distributor 5 into the boat (in this process, the amount of material in the distributor 5 can be accurately known through the level meter 6). The boat with the material is pushed by the boat behind it (in production, the trays are discharged one by one, and the rear tray will give a pushing force to the front tray to promote the forward movement of the tray) into the high-temperature furnace 8 for high-temperature roasting, and the generated arsenic vapor is collected through the arsenic vapor collection pipe 9 into the settling collection chamber 15. The roasting slag in the boat after the reaction in the high-temperature furnace 8 is finally cooled in the cooling water jacket 10 through the continuous pushing of the rear boat, and finally enters the discharge chamber 11 through the continuous pushing of the rear boat in the cooling zone, and is lifted by the second lifting rod 12 into the third tray 123 at the top. Then, the third tray 123 is lowered to the bottom, and the third push rod 13 pushes the boat in the third tray 123 into the second tray 116 for unloading and turning, and returns. After the second tray 116 is turned and unloaded, the third push rod 13 pushes the boat in the second tray 116 onto the boat return roller 14 for return. The boat returns to the first tray at the bottom of the pre-feeding chamber 2 through the boat return roller 14, i.e., the boat completes a cycle after returning to the feeding area through the boat return roller 14.

[0047] The arsenic steam generated by high-temperature reduction roasting enters the closed airflow channel formed by the communication of the settling tanks 151, and the high-temperature arsenic steam is rapidly cooled and condensed into a solid state in the entire closed airflow channel (the settling tanks 151) under the condensing action of the condensing pipes 154, and most of the arsenic steam entering through the arsenic steam collection pipe 9 is collected in the front two settling tanks 151, and a small part is collected in the rear settling tanks 151. In this process, due to the installation of the condensing pipes 154, the cooling area is increased, the cooling efficiency is improved, and the purpose of high-efficiency collection of elemental arsenic is achieved. A small part of the arsenic steam that does not settle in the settling tanks 151 is discharged after dust removal by the wet electrostatic precipitator through the tail gas pipe 152. The elemental arsenic collected in the settling tanks 151 can be shaken to the discharge port by opening the air hammer 157 installed on the settling tanks 151; the elemental arsenic collected in the settling tanks 151 is discharged into the product collection closed container 156 by opening the pneumatic discharge valve 155, and the purpose of safe and efficient collection of elemental arsenic is finally achieved.

[0048] When the discharge is turned over, first, the second lifting rod 12 pulls the third tray 123 to the receiving position, and after the tray cooled in the cooling area is pushed into the third tray 123 under the rear tray pushing force, the second lifting rod 12 lowers the third tray 123 to the transfer position, and then the third pushing rod 13 pushes the tray in the third tray 123 to the second tray 116 for turning over and discharging, and then the clamping mechanism is started to make the tray stopper 122 pop out to block the boat on the second tray 116, and then the third pushing rod 13 returns to the original position; then, the transmission mechanism 119 (hydraulic turning rod) starts to operate, the transmission gear 118 operates, the turning gear 117 rotates, and then the second tray 116 connected thereto is pulled to the discharge angle, the slag is separated from the tray, and the slag is poured into the discharge port 115; finally, the transmission mechanism 119 (hydraulic turning rod) returns to the original position, and the tray stopper 122 is recovered to the original position under the action of the clamping mechanism, and the third pushing rod 13 is started again to push the tray in the second tray 116 to the second tray outlet 114 and enter the tray return roller 14, and then the third pushing rod 13 returns to the original position to complete one slagging, and the continuous slagging is completed by repeating the above process. It can be seen that the entire slagging process of the present application is carried out in the fully enclosed discharge chamber 11, which reduces dust dispersion and protects the environment.

[0049] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make many possible changes and modifications to the technical solutions of the present application, or modify equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application, by using the technical contents disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solutions of the present application, shall fall within the protection scope of the technical solutions of the present application.

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 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 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 distribution area, characterized in that: A feeding front chamber and a distributor are provided in the feeding front chamber, 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; 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, and the last sedimentation box is installed with a tail gas pipe. The plurality of sedimentation boxes are connected in sequence through a condenser pipe 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 carries the tray through the high-temperature furnace and then enters the cooling water jacket; The unloading area is provided with an unloading chamber, the unloading chamber is provided with a second material tray inlet communicated with the output end of the material tray conveying roller and a second material tray outlet communicated with the material tray return roller, a material tray turning space is provided in the unloading chamber, 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 the transmission gear, and the transmission gear is connected to the transmission mechanism, and when the transmission mechanism drives the transmission gear, the transmission gear rotates with the turning gear and the second tray to the slag unloading angle, and a slag unloading port is provided at the bottom of the material tray turning space; 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 second tray inlet, and the transfer position is connected to the unturned second tray. A third push rod is installed on the unloading chamber to push the tray at the transfer position onto the second pallet, and the pushing direction of the third push rod is facing the second tray outlet.

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

5. The complete device for continuously preparing elemental arsenic according to claim 1, characterized in that: An air hammer is installed on each of the settlement boxes.

6. The complete device 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.

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

Images