CN216725853U - Production device for preparing arsenic trioxide from crude arsenic - Google Patents
Production device for preparing arsenic trioxide from crude arsenic Download PDFInfo
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- CN216725853U CN216725853U CN202220331704.7U CN202220331704U CN216725853U CN 216725853 U CN216725853 U CN 216725853U CN 202220331704 U CN202220331704 U CN 202220331704U CN 216725853 U CN216725853 U CN 216725853U
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Abstract
The utility model relates to the technical field of arsenic trioxide preparation, in particular to a production device and a method for continuously and massively preparing arsenic trioxide from crude arsenic. A production device for preparing arsenic trioxide from crude arsenic, which comprises: the device comprises a feeding device, a discharging device, a blowing device, a thermal reaction device, an arsenic collecting device, a flue gas treatment device, a discharging device and a control device; the outlet of the feeding device is connected with the inlet of the discharging device through a pipeline, the outlet of the discharging device is connected with the inlet of the three-way pipe, two outlets of the three-way pipe are respectively connected with the air outlet of the blowing device and the inlet of the thermal reaction device, the outlet of the thermal reaction device is connected with the top inlet of the arsenic collecting device through a pipeline, the top outlet of the arsenic collecting device is connected with the inlet of the flue gas treatment device through a pipeline, and the bottom outlet of the arsenic collecting device is connected with the discharging device. The utility model can continuously and automatically prepare high-purity arsenic trioxide in large batch.
Description
Technical Field
The utility model relates to the technical field of arsenic trioxide preparation, in particular to a production device for continuously and massively preparing arsenic trioxide from crude arsenic.
Background
Arsenic trioxide (commonly known as arsenic trioxide) is mainly used in agricultural and coating materials and in pharmaceutical industry as pesticide, rust-removing preservative, chemical preparation, etc. At present, the process technology for separating and refining high-purity arsenic trioxide by using crude arsenic trioxide (crude arsenic described in this specification) as a raw material mainly utilizes the characteristic that arsenic trioxide is easy to sublimate, and impurities (oxides of iron, zinc and the like) in the arsenic trioxide are not sublimated for separation, and generally is carried out in a vacuum sublimation furnace, and the sublimation temperature and the condensation temperature are controlled to separate and remove the impurities in the arsenic trioxide, so that the high-purity arsenic trioxide is obtained. In the conventional preparation method for extracting arsenic by using the existing sublimation method, the purity of the prepared arsenic trioxide is not high, the prepared arsenic trioxide generally only reaches the secondary arsenic trioxide (the content of the arsenic trioxide is about 98 percent), the working environment is severe, and the risk of serious arsenic pollution to the surrounding environment is caused.
For the improvement of the production and purification of arsenic trioxide, the following two technologies exist: a chain strip type process furnace and a steel belt conveying type process furnace. The basic principle of the two production processes is that crude arsenic is conveyed into a process furnace through a belt conveyor, after an inlet is sealed, the process furnace is heated and insulated, the flue gas of an arsenic trioxide product is conveyed into a product collecting bin from an outlet at the top of the furnace, then, a process furnace opening is opened, and the crude arsenic is conveyed into the process furnace again, so that the arsenic trioxide is prepared in a circulating and reciprocating manner.
Although the two production processes improve the production efficiency, the production process has the problems of untight sealing of the process furnace, frequent failure, unstable product quality, high production cost, high labor intensity, ineffective control of environmental pollution, difficulty in long-term work of workers directly participating in production and the like. In addition, the production process can not prepare high-purity arsenic trioxide in a large batch, continuous, low-energy-consumption and automatic mode, and is difficult to realize the requirement of industrial production and meet the requirements of energy conservation, emission reduction and environmental protection. Therefore, it is the current research direction to develop a device for preparing high-purity arsenic trioxide in a large batch, continuous and automatic manner by using crude arsenic (the content of arsenic trioxide is about 96%) as a material.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a production device for preparing arsenic trioxide from crude arsenic, which prepares and purifies the arsenic trioxide by a sublimation method, can greatly improve the automation degree, has small material component fluctuation and stable oxidation effect because of continuous feeding, has high production safety under a sealed environment and can prepare the arsenic trioxide in large batch.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a apparatus for producing of coarse arsenic preparation arsenic trioxide which characterized in that: the device includes: the device comprises a feeding device, a discharging device, a blowing device, a thermal reaction device, an arsenic collecting device, a flue gas treatment device, a discharging device and a control device; the outlet of the feeding device is hermetically connected with the inlet of the discharging device through a pipeline, the outlet of the discharging device is hermetically connected with the inlet of the three-way pipe, two outlets of the three-way pipe are respectively and hermetically connected with the air outlet of the blowing device and the inlet of the thermal reaction device, the outlet of the thermal reaction device is hermetically connected with the top inlet of the arsenic collecting device through a pipeline, the top outlet of the arsenic collecting device is hermetically connected with the inlet of the flue gas treatment device through a pipeline, the bottom outlet of the arsenic collecting device is hermetically connected with the discharging device, and the control device is respectively connected with and controls the feeding device, the discharging device, the blowing device, the thermal reaction device, the dust collecting device, the flue gas treatment device and the discharging device.
Further, the discharging device comprises a primary discharging valve, a secondary discharging valve and a weighing and metering device, wherein the inlet of the primary discharging valve is connected with the outlet of the feeding device in a sealing manner, the outlet of the primary discharging valve is connected with the inlet of the secondary discharging valve in a sealing manner through a pipeline, the outlet of the secondary discharging valve is connected with the inlet of the weighing and metering device in a sealing manner through a pipeline, and the outlet of the weighing and metering device is connected with the inlet of the three-way pipe in a sealing manner through a pipeline.
Further, the thermal reaction device comprises an outer shell, a heat preservation layer and an inner shell, wherein multiple groups of heating assemblies are sequentially arranged on the outer surface of the inner shell at intervals along the length direction of the inner shell, a plurality of baffles are arranged in the inner shell at intervals along the length direction of the inner shell, each baffle is provided with a notch, and each notch is arranged along the length direction of the inner shell in a staggered manner.
Further, the blowing device comprises a fan and a heating furnace, an outlet of the fan is connected with an inlet of the heating furnace in a sealing manner, and an outlet of the heating furnace is connected with a three-way pipe in a sealing manner.
Further, it includes one-level cooling crystallization device, second grade cooling crystallization device, tertiary dust arrester installation to receive the arsenic device, the export of thermal reaction unit passes through the top entry of pipeline sealing connection one-level cooling crystallization device, the top export of one-level cooling crystallization device passes through the top entry of pipeline sealing connection second grade cooling crystallization device, the entry of pipeline sealing connection tertiary dust arrester installation is passed through in the top export of second grade cooling crystallization device, the entry of pipeline sealing connection flue gas processing apparatus is passed through in the top export of tertiary dust arrester installation, the bottom export of one-level cooling crystallization device, second grade cooling crystallization device, tertiary dust arrester installation is sealing connection discharging device respectively.
Furthermore, outlets at the bottoms of the first-stage cooling crystallization device, the second-stage cooling crystallization device and the third-stage dust collection device are respectively connected with the discharging device in a sealing mode through two-stage discharge valves in sequence.
Further, the feeding device and the discharging device are both screw conveyors.
Furthermore, a slag discharging hole is formed in the bottom of the three-way pipe, and the sealing end cover detachably seals the slag discharging hole.
Compared with the prior art, the utility model has the beneficial effects that:
1. by adopting the technical scheme, the method can be used for preparing high-purity arsenic trioxide from crude arsenic in a continuous and large-batch manner by using a sublimation method, and can also ensure that the whole preparation system is in a closed state, thereby avoiding potential safety hazards caused by arsenic trioxide flue gas leakage.
2. The control device is used for connecting and controlling the feeding device, the discharging device, the blowing device, the thermal reaction device, the arsenic collecting device, the flue gas treatment device and the discharging device, so that the automation of arsenic trioxide preparation is realized, the unattended operation is realized, and the good popularization and application prospect is realized.
3. Related equipment such as a feeding device and a discharging device can adopt a screw conveyor, a discharging device can adopt a discharging valve controlled by a servo motor, a blowing device can adopt a Roots blower and a heating furnace, an arsenic collecting device can adopt the existing condensation kettle and dust collecting equipment, a flue gas treatment device can adopt a spray tower and a water bath treatment technology, and the related equipment and the technology are standardized equipment, so that the construction of the whole production system is facilitated, and the development cost of the system equipment is saved; in addition, sectional temperature control is adopted in the thermal reaction device, the reaction temperature can be increased and then reduced, the efficiency of preparing arsenic trioxide is improved, energy conservation and consumption reduction can be realized, and carbon emission is reduced.
4. The discharging device adopts a secondary discharging mechanism, so that the sealing performance of the whole system can be improved while continuous discharging is realized, and the arsenic trioxide gas is prevented from escaping; the arsenic collecting device adopts a three-level arsenic collecting mechanism, so that the arsenic collecting efficiency and the arsenic collecting quality are further improved.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
FIG. 2 is a schematic partial sectional view of a thermal reaction apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a half-sectional structure of a thermal reaction apparatus according to an embodiment of the present invention.
In the figure: 1. the device comprises a feeding device, 11, a horizontal screw conveyor, 12, a vertical screw conveyor, 13, a feeding port, 2, a discharging device, 21, a primary discharging valve, 22, a secondary discharging valve, 23, a weighing and metering device, 24, a temporary storage box, 25, a bulk cargo pipe, 26, a three-way pipe, 27, a slag discharging hole, 3, a blowing device, 31, a fan, 32, a heating furnace, 4, a thermal reaction device, 41, an outer shell, 42, a heat insulation layer, 43, an inner shell, 44, a heating assembly, 45, a baffle, 46, a notch, 5, an arsenic collecting device, 51, a primary cooling and crystallizing device, 52, a secondary cooling and crystallizing device, 53, a tertiary dust collecting device, 54, a secondary discharging valve, 6, a smoke processing device, 7, a discharging device, 8 and a control device.
Detailed Description
The following examples are provided to further illustrate the embodiments of the present invention.
Referring to the attached figure 1, a production device for preparing arsenic trioxide from crude arsenic comprises: a feeding device 1, a discharging device 2, a blowing device 3, a thermal reaction device 4, an arsenic collecting device 5 and a flue gas treatment device 6, the outlet of the feeding device 1 is hermetically connected with the inlet of the discharging device 2 through a pipeline, the outlet of the discharging device 2 is hermetically connected with the inlet of a three-way pipe 26, two outlets of the three-way pipe 26 are respectively and hermetically connected with the air outlet of the blowing device 3 and the inlet of the thermal reaction device 4, the outlet of the thermal reaction device 4 is hermetically connected with the top inlet of the arsenic collecting device 5 through a pipeline, the top outlet of the arsenic collecting device 5 is hermetically connected with the inlet of the flue gas treatment device 6 through a pipeline, the bottom outlet of the arsenic collecting device 5 is hermetically connected with the discharging device 7, and the control device 8 is respectively connected with and controls the feeding device 1, the discharging device 2, the blowing device 3, the thermal reaction device 4, the dust collecting device 5, the flue gas treatment device 6 and the discharging device 7.
The production device is used for continuously preparing and purifying the arsenic trioxide from the arsenic trioxide coarse material with the arsenic trioxide content of more than 96 percent and the crushed arsenic trioxide coarse material with the granularity of less than 1 mm.
And the feeding device 1 is used for conveying the arsenic trioxide coarse material into the discharging device 2 for standby. The feeding device 1 comprises a horizontal screw conveyer 11 in the horizontal direction and a vertical screw conveyer 12 in the vertical direction communicated with the horizontal screw conveyer 11, a feeding port 13 is arranged on the horizontal screw conveyer 11, and crude arsenic enters the feeding device 1 through the feeding port 13. The horizontal screw conveyor 11 and the vertical screw conveyor 12 are used as feeding devices, so that the crude arsenic is in a sealed state in the feeding process.
And the discharging device 2 is used for temporarily storing, metering and discharging the crude arsenic conveyed by the feeding device 1. The discharging device 2 comprises a primary discharging valve 21, a secondary discharging valve 22 and a weighing and metering device 23, wherein the inlet of the primary discharging valve 21 is hermetically connected with the outlet of the vertical screw conveyor 12 through a flange, and the outlet of the primary discharging valve 21 and the inlet of the secondary discharging valve 22 are hermetically connected with the two ends of a temporary storage box 24 through flanges respectively; the outlet of the secondary discharge valve 22 is hermetically connected with the inlet of the weighing and metering device 23, the outlet of the weighing and metering device 23 is hermetically connected with the ellipsoidal material dispersing pipe 25 through a flange, and the outlet of the ellipsoidal material dispersing pipe 25 is hermetically connected with the inlet of the three-way pipe 26 through a flange.
The primary discharge valve 21 and the secondary discharge valve 22 are both discharge mechanisms controlled by servo motors, and the control device 8 controls the rotation of the servo motors to complete the opening and closing of the discharge channels. By adopting the two-stage discharging mechanism, firstly, asynchronous discharging of the primary discharging valve and the secondary discharging valve can be realized during discharging, so that the sealing effect of the discharging device 2 can be realized, and the situation that arsenic trioxide gas generated by the thermal reaction device flows out of the feeding device 1 from the discharging device 2, enters the feeding device 1 and is discharged out of the atmosphere to cause potential safety and environmental hazards is avoided; secondly, the continuity of the crude arsenic can be realized to improve the unloading efficiency, when the weighing and metering device 23 detects that the crude arsenic in the weighing and metering device reaches the set threshold value, the sensing signal is transmitted to the control device 8, the control device 8 controls the secondary unloading valve 22 to be opened, the crude arsenic in the temporary storage box 24 is evenly unloaded in the set time according to the set unloading speed, after the crude arsenic in the temporary storage box 24 is unloaded, the secondary unloading valve 22 is closed, the control device 8 controls the primary unloading valve 21 to be opened, and the crude arsenic in the loading device 1 enters the temporary storage box 24. A weighing and metering device 23 can be installed in the temporary storage box 24, and when the volume of the fallen crude arsenic reaches the threshold value of the weighing and metering device 23, the primary discharge valve 21 is closed; the amount of god falling into the temporary storage box 24 can also be controlled by controlling the time of opening and closing the primary discharge valve 21.
Through setting up ellipsoid bulk material pipe 25, make the coarse arsenic who falls into from weighing and metering device 23 disperse, avoid the caking, block up the pipeline.
And the thermal reaction device 4 is used for heating the crude arsenic and generating arsenic trioxide gas. Referring to fig. 2 and 3, the thermal reaction device comprises an outer shell 41, an insulating layer 42 and an inner shell 43, wherein the inlet of the inner shell 43 is hermetically connected with one outlet of the three-way pipe 26, and the crude arsenic discharged from the discharging device 2 is blown into the inner shell 43 by the blowing device 3 to be heated. A plurality of groups of heating assemblies 44 are sequentially fixed on the outer surface of the inner shell 43 at intervals along the length direction of the inner shell, a plurality of baffles 45 are welded in the inner shell 43 at intervals along the length direction of the inner shell, each baffle is provided with a notch 46, and each notch 46 is arranged in a staggered manner along the length direction of the inner shell.
The heating temperature of the multiple groups of heating assemblies 44 can be controlled by the control device 8, and segmented management of the temperature in the thermal reaction device 4 is realized. When the emphasis is on improving the production efficiency, the temperature of each heating element 44 can be set to the optimum temperature for the crude arsenic reaction; when energy conservation and consumption reduction are emphasized, the temperature of each heating component 44 can be controlled to be gradually increased, maintained at a certain temperature and reduced along the advancing direction of the crude arsenic, so that the sufficient reaction of the crude arsenic can be realized, and the energy conservation and consumption reduction can be finely managed to a certain extent.
The baffle 45 has various structural forms, as shown in fig. 2 and 3, the baffle 45 is of an integral structure, notches 46 are formed in the baffle 45, the notches 46 in the baffle 45 are staggered in the vertical direction, and the cross sections of the notches can be circular, oval, directional and other shapes. The baffle 45 can also be provided to include an upper baffle and a lower baffle, a gap 46 is provided between the upper baffle and the lower baffle, and the gaps 46 are staggered in the up-down direction.
Under the action of the heating assembly 44, each baffle 45 fixed in the inner shell 43, especially on the inner wall corresponding to the heating assembly 44, has a certain temperature, and by arranging the baffles 45, the contact area of the crude arsenic and the thermal reaction device 4 is increased, so that the sublimation reaction of the crude arsenic is more sufficient. Through setting up crisscross breach 46 each other, both increased the area of contact of crude arsenic thermal reaction, increased reaction time, also had the vortex effect simultaneously, further improved the quality and the efficiency of crude arsenic preparation arsenic trioxide.
To further increase the contact area of the crude arsenic with the baffle 46 during reaction, the baffle 46 may be designed as a fin structure.
And an air blowing device 3 for generating hot air and blowing the crude arsenic discharged from the discharging device 2 into the thermal reaction device 4. The blowing device 3 comprises a blower 31 and a heating furnace 32, the blower 31 can be a roots blower, the outlet of the blower 31 is hermetically connected with the inlet of the heating furnace 32, and the outlet of the heating furnace 32 is hermetically connected with the other outlet of the tee pipe 26 (i.e. the outlet of the tee pipe 26 opposite to the inlet of the connecting inner shell 43). In order to prevent the cold air blown by the fan 31 from dissipating the heat in the thermal reaction device 4, a heating furnace 32 is provided. The control device 8 can control the rotation speed of the fan 31 to control the blowing speed of the crude arsenic and can control the temperature of the heating furnace 32 to control the reaction speed of the crude arsenic in the thermal reaction device 4.
And the arsenic collecting device 5 is used for cooling and crystallizing the arsenic trioxide gas. The arsenic collecting device 5 comprises a primary cooling and crystallizing device 51, a secondary cooling and crystallizing device 52 and a tertiary dust collecting device 53. An outlet of an inner shell 43 of the thermal reaction device 4 is hermetically connected with a top inlet of a first-stage cooling crystallization device 51 through a pipeline, a top outlet of the first-stage cooling crystallization device 51 is hermetically connected with a top inlet of a second-stage cooling crystallization device 52 through a pipeline, a top outlet of the second-stage cooling crystallization device 52 is hermetically connected with an inlet of a third-stage dust collecting device 53 through a pipeline, a top outlet of the third-stage dust collecting device 53 is hermetically connected with an inlet of a flue gas treatment device 6 through a pipeline, and bottom outlets of the first-stage cooling crystallization device 51, the second-stage cooling crystallization device 52 and the third-stage dust collecting device 53 are hermetically connected with a discharging device respectively.
The primary cooling crystallization device 51 and the secondary cooling crystallization device 52 can be existing water cooling kettles, and the tertiary dust collection device 53 can be an existing bag type dust collector or a pulse type dust collector. The arsenic trioxide gas can be cooled and crystallized through a first-stage cooling crystallization device and a second-stage cooling crystallization device, and the residual arsenic trioxide gas which is not cooled and crystallized is subjected to arsenic recovery through a third-stage dust collection device.
In order to keep the sealing effect of the whole system and avoid the arsenic trioxide gas from escaping to the atmosphere through the arsenic collecting device 5 and the discharging device 7, outlets at the bottoms of the first-stage cooling and crystallizing device 51, the second-stage cooling and crystallizing device 52 and the third-stage dust collecting device 53 of the arsenic collecting device 5 are respectively connected with the discharging device 7 in a sealing manner through two-stage discharge valves 54 in sequence. The two-stage discharge valve 54 in this position may be provided in accordance with the above-described arrangement and structure of the first-stage discharge valve 21 and the second-stage discharge valve 22, and the outlets of the two-stage discharge valves 54 are connected to the discharging device 7 through sealing flanges, respectively.
And the discharging device 7 is used for conveying the crystallized arsenic trioxide into the collecting container. The discharging device 7 can be a horizontally arranged screw conveyor, the outlets of the two-stage discharging valves 54 are respectively connected with the screw conveyor through sealing flanges, and the sealing effect of the discharging process can be realized through the screw conveyor.
In order to avoid the blockage of the three-way pipe 26 caused by overlarge moisture content, larger particles or overlarge impurities of the crude arsenic, the bottom of the three-way pipe is provided with a slag discharging hole 27, and the sealing end cover detachably seals the slag discharging hole 27. When the three-way pipe 26 is blocked, the blocked material can be cleaned by opening the sealing end cover.
And the flue gas treatment device 6 is used for collecting and intensively treating the gas which cannot be crystallized. Other impurity gases which can not be subjected to arsenic collection through condensation crystallization or a dust collection device need to be treated, and the flue gas treatment device 6 can be used for treating by using a spray tower and a water bath technology in the prior art.
And the control device 8 is used for connecting and controlling the feeding device 1, the discharging device 2, the blowing device 3, the thermal reaction device 4, the arsenic collecting device 5, the flue gas treatment device 6 and the discharging device 7. The control device 8 is connected with and controls the devices, so that the automatic and digital control of the production system can be realized, even the unattended production can be realized, and the adjustment can be carried out according to actual production parameters, production environment and production mode.
For example, the control device 8 can control the feeding speed and the feeding amount by controlling the feeding device 1, the discharging device 2 to control the discharging speed, the discharging amount and the discharging interval, the blowing device 3 to control the wind speed and the blowing temperature, the thermal reaction device 4 to control the thermal reaction temperature, the arsenic collecting device 5 to control the arsenic collecting speed and the arsenic collecting amount, the flue gas treatment device 6 to control the waste gas treatment speed and the treatment amount, and the discharging device 7 to control the discharging speed and the discharging amount. The program of the control device 8 for controlling the parameters of various related devices can utilize the existing program, so that the control and the construction of the whole production system are facilitated, the production efficiency and the production safety of arsenic trioxide are improved, and the construction cost of the whole production system is reduced.
The feeding device 1, the discharging device 2, the blowing device 3, the thermal reaction device 4, the arsenic collecting device 5, the flue gas treatment device 6 and the discharging device 7 can be provided with a plurality of groups, and the control device 8 controls the automatic operation of the plurality of groups respectively, so that the production efficiency can be further improved. In order to reduce the complexity of the whole multi-group production system, the feeding device 1 can be set into a group of feeding mechanisms consisting of a horizontal screw conveyor and a vertical screw conveyor and feeding mechanisms respectively communicated with the discharging devices, and the feeding mechanisms can be belt transmission feeding mechanisms, gas conveying mechanisms and the like.
The working principle of the embodiment for preparing arsenic trioxide from crude arsenic is as follows:
as shown in FIG. 1, first, the control device 8 controls the internal temperature of the thermal reaction device 4, and the temperature in the heating furnace 32 to control the temperatures in the primary and secondary condensing-crystallizing devices to appropriate temperatures. In addition, according to the production efficiency of crude arsenic and the requirements of energy conservation and consumption reduction, the control device 8 respectively controls the feeding speed of the feeding device 1, the discharging speed and the discharging amount of the discharging device 2, the wind speed of the fan 31, the discharging speed of the discharging device 7, the dust collecting speed of the three-stage dust collecting device, the processing speed of the flue gas processing device 6 and other parameters.
Under the premise that all parameters are set, the primary discharge valve and the secondary discharge valve are in a closed state by two stages of discharge valves. During production, the control device 8 controls the fan 31 to be opened, coarse arsenic enters the horizontal screw conveyor 11 through the feeding port 13, the control device 8 controls the primary discharge valve and the secondary discharge valve to be opened, and after the coarse arsenic enters the weighing and metering device 23, the secondary discharge valve 22 is closed. After the crude arsenic in the temporary storage box 24 reaches a set threshold value, the primary discharge valve 21 is closed, meanwhile, the crude arsenic in the weighing and metering device 23 enters the thermal reaction device 4 through the bulk material pipe 25 and the three-way pipe 26 to react to generate arsenic trioxide gas, the arsenic trioxide gas is collected through the primary condensation crystallization device 51, the secondary condensation crystallization device 52 and the three-stage dust collection device 53, when the arsenic trioxide gas reaches a certain amount, the control device 8 controls the two-stage discharge valve to be opened, and the arsenic trioxide solid enters the discharge device 7 and is conveyed to a finished product bin through the discharge device 7. The impurity gas which is not collected by the first-stage condensation crystallization device 51, the second-stage condensation crystallization device 52 and the third-stage dust collecting device 53 is discharged after being treated in a harmless and pollution-free way by the flue gas treatment device 6.
When the amount of the coarse arsenic in the weighing and metering device 23 reaches a set threshold value, the control device 8 controls the secondary discharge valve 22 to be opened, after the coarse arsenic in the temporary storage box 24 enters the weighing and metering device 23, the secondary discharge valve 22 is closed, the primary discharge valve 21 is opened, and after the coarse arsenic enters the temporary storage box 24 through the feeding device 1, the control device 8 controls the primary discharge valve 21 to be closed. And the operation is repeated in sequence.
The above embodiments and examples are specific supports for the technical idea of the production apparatus for preparing arsenic trioxide from crude arsenic provided by the present invention, and the protection scope of the present invention should not be limited thereby, and any equivalent changes or equivalent modifications made on the basis of the technical scheme according to the technical idea provided by the present invention still belong to the protection scope of the technical scheme of the present invention.
Claims (8)
1. The utility model provides a apparatus for producing of coarse arsenic preparation arsenic trioxide which characterized in that: the device includes: the device comprises a feeding device, a discharging device, a blowing device, a thermal reaction device, an arsenic collecting device, a flue gas treatment device, a discharging device and a control device; the outlet of the feeding device is hermetically connected with the inlet of the discharging device through a pipeline, the outlet of the discharging device is hermetically connected with the inlet of the three-way pipe, two outlets of the three-way pipe are respectively and hermetically connected with the air outlet of the blowing device and the inlet of the thermal reaction device, the outlet of the thermal reaction device is hermetically connected with the top inlet of the arsenic collecting device through a pipeline, the top outlet of the arsenic collecting device is hermetically connected with the inlet of the flue gas treatment device through a pipeline, the bottom outlet of the arsenic collecting device is hermetically connected with the discharging device, and the control device is respectively connected with and controls the feeding device, the discharging device, the blowing device, the thermal reaction device, the dust collecting device, the flue gas treatment device and the discharging device.
2. The production device for preparing arsenic trioxide from crude arsenic as claimed in claim 1, wherein: the discharge device comprises a primary discharge valve, a secondary discharge valve and a weighing and metering device, wherein the inlet of the primary discharge valve is hermetically connected with the outlet of the feeding device, the outlet of the primary discharge valve is hermetically connected with the inlet of the secondary discharge valve through a pipeline, the outlet of the secondary discharge valve is hermetically connected with the inlet of the weighing and metering device through a pipeline, and the outlet of the weighing and metering device is hermetically connected with the inlet of the three-way pipe through a pipeline.
3. The production device for preparing arsenic trioxide from crude arsenic as claimed in claim 1, wherein: the thermal reaction device comprises an outer shell, a heat preservation layer and an inner shell, wherein multiple groups of heating assemblies are sequentially arranged on the outer surface of the inner shell at intervals along the length direction of the inner shell, a plurality of baffles are arranged in the inner shell at intervals along the length direction of the inner shell, each baffle is provided with a notch, and each notch is arranged along the length direction of the inner shell in a staggered manner.
4. The production device for preparing arsenic trioxide from crude arsenic as claimed in claim 1, wherein: the blowing device comprises a fan and a heating furnace, an outlet of the fan is connected with an inlet of the heating furnace in a sealing manner, and an outlet of the heating furnace is connected with a three-way pipe in a sealing manner.
5. The production device for preparing arsenic trioxide from crude arsenic as claimed in claim 1, wherein: receive arsenic device and include one-level cooling crystallization device, second grade cooling crystallization device, tertiary dust arrester installation, pipeline sealing connection one-level cooling crystallization device's top entry is passed through in the export of hot reaction unit, pipeline sealing connection second grade cooling crystallization device's top entry is passed through in the export of one-level cooling crystallization device's top, pipeline sealing connection tertiary dust arrester installation's entry is passed through in the export of second grade cooling crystallization device's top, pipeline sealing connection flue gas processing apparatus's entry is passed through in tertiary dust arrester installation's top export, one-level cooling crystallization device, second grade cooling crystallization device, tertiary dust arrester installation's bottom export difference sealing connection discharging device.
6. The production device for preparing arsenic trioxide from crude arsenic as claimed in claim 5, wherein: and bottom outlets of the first-stage cooling crystallization device, the second-stage cooling crystallization device and the third-stage dust collection device are respectively connected with the discharging device in a sealing mode through two-stage discharge valves in sequence.
7. The production device for preparing arsenic trioxide from crude arsenic as claimed in claim 1, wherein: and the feeding device and the discharging device are both screw conveyors.
8. The production device for preparing arsenic trioxide from crude arsenic as claimed in claim 1, wherein: the bottom of the three-way pipe is provided with a slag discharging hole, and the sealing end cover can detachably seal the slag discharging hole.
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| CN202220331704.7U CN216725853U (en) | 2022-02-18 | 2022-02-18 | Production device for preparing arsenic trioxide from crude arsenic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114344933A (en) * | 2022-02-18 | 2022-04-15 | 郑州德凯科技有限公司 | Production device and method for preparing arsenic trioxide from crude arsenic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114344933A (en) * | 2022-02-18 | 2022-04-15 | 郑州德凯科技有限公司 | Production device and method for preparing arsenic trioxide from crude arsenic |
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