CN117804243A - Slag-discharging smoke recycling device for yellow phosphorus production - Google Patents

Abstract

The invention discloses a slag-discharging smoke recycling device for yellow phosphorus production, which relates to the field of chemical waste removal, and comprises a slag discharging mechanism and a slag pool mechanism, wherein the slag pool mechanism comprises a containing body and a cover plate, a smoke extraction pipe is communicated with the containing body, the cover plate can be movably covered on the containing body, a sealed containing cavity is formed by the containing body and the cover plate, and the slag pool mechanism is communicated with the slag discharging mechanism; the cover plate is formed by splicing a plurality of grating plates, the middle of each grating plate is separated by a cover steel groove, one end of each grating plate is hinged with the cover steel groove, the other end of each grating plate is in a free state, and when the pressure in the accommodating cavity is less than or equal to the atmospheric pressure, each grating plate is sealed with the cover steel groove. The cover plate is formed by splicing the plurality of grid plates, the grid plates are movably arranged and matched with the smoke extraction pipe, so that the purposes of avoiding the risk of injury to operators caused by excessive water vapor in the slag pool and extremely rapid expansion of gas in the slag pool and flushing of the cover plate are achieved.

Description

Slag-discharging smoke recycling device for yellow phosphorus production

Technical Field

The invention relates to the field of chemical waste removal, in particular to a slag-discharging flue gas recovery device for yellow phosphorus production.

Background

The electric furnace method is a common method for producing yellow phosphorus, which mainly extracts yellow phosphorus by smelting phosphate ore, slag is required to be discharged every 3-4 hours, a large amount of smoke is generated in the slag discharging process, and the main components of the smoke are harmful gases such as phosphorus, sulfur, carbon monoxide and the like, if any of the harmful gases is discharged in an unorganized manner, the smoke can pollute the environment and endanger human health. This method generally involves the use of an electric furnace for ore smelting, the specific steps being as follows: raw material preparation: phosphate ores are the primary raw material for this process, and typically contain oxides and impurities. These ores are crushed and finely processed for smelting in an electric furnace; smelting in an electric furnace: the phosphate ore is placed in an electric furnace where electrical energy is typically used to generate high temperatures to melt the ore. At high temperatures, oxides in the ore are reduced to phosphorus; yellow phosphorus extraction: after smelting, the liquid state of yellow phosphorus produced is collected. This is to ensure high purity yellow phosphorus by controlling the temperature and smelting conditions. This produces fumes and waste residues containing harmful substances such as sulphur, phosphorus, etc., which constitute a potential risk to the environment and to the health of humans, and therefore the attention of emissions treatment and fume cleaning is particularly important for this production method.

At present, most yellow phosphorus production slag discharging positions are open, flue gas in the slag discharging process is not subjected to centralized treatment, and a slag pool cover plate is mostly an open or integral cover plate, when slag in a high-temperature molten state flows into a slag pool, the slag pool is quenched into blocks or particles by water, meanwhile, water in the slag pool generates a large amount of water vapor due to the fact that a large amount of heat energy enters, and the water vapor contains phosphoric acid and has corrosiveness, so that electrical equipment in a factory building can be corroded, potential safety hazards are caused, and harm can be caused to the environment and human health. Therefore, it is objectively required to develop a recycling device with reasonable structure, low flue gas treatment cost and good flue gas treatment effect.

In view of this, the present application is specifically proposed.

Disclosure of Invention

The invention aims to provide a slag-discharging flue gas recovery device for yellow phosphorus production, which is formed by splicing a plurality of grid plates with cover plates, wherein the grid plates are movably arranged and matched with a smoke extraction pipe, so that the problem that operators are injured due to the fact that gas in a slag tank expands extremely rapidly due to too much water vapor when the slag tank is provided with an integral cover plate in the prior art is solved.

The embodiment of the invention is realized by the following technical scheme: the utility model provides a yellow phosphorus production arranges sediment flue gas recovery unit, includes sediment mechanism and slag bath mechanism, and slag bath mechanism includes accommodation body and apron, and the intercommunication has the smoking pipe on the accommodation body, and the apron movable cover closes on the accommodation body, holds body and apron and forms a sealed accommodation cavity, slag bath mechanism and sediment mechanism intercommunication.

The cover plate is formed by splicing a plurality of grating plates, the middle of each grating plate is separated by a cover steel groove, one end of each grating plate is hinged with the cover steel groove, the other end of each grating plate is in a free state, and when the pressure in the accommodating cavity is less than or equal to the atmospheric pressure, each grating plate is sealed with the cover steel groove.

Preferably, when the upward thrust of the flue gas in the accommodating chamber to the cover plate is equal to the sum of the gravity of the cover plate and the friction force between the cover plate and the accommodating body, a gap is formed between the grid plate and the cover steel groove.

Preferably, the slag discharging mechanism is provided with an exhaust pipe.

Preferably, the exhaust pipe is arranged at the top of the slag discharging mechanism.

Preferably, the side surface of the slag discharging mechanism is hinged with a plurality of side doors, and when the side doors are closed, the slag discharging mechanism is in a sealing state.

Preferably, the top of the slag discharging mechanism is provided with a slag discharging steel groove, the top of the slag discharging mechanism is sealed through a plurality of top doors, and the top doors are clamped with the slag discharging steel groove.

Preferably, the top door is upwardly arched.

Preferably, the side door is provided with two or more.

Preferably, the slag discharging mechanism is communicated with the slag pool mechanism through a pipeline mechanism.

Preferably, the conduit means is provided with a transfer means.

Compared with the prior art, the embodiment of the invention has the following advantages and beneficial effects:

according to the slag-discharging smoke recycling device for yellow phosphorus production, the cover plate of the slag pool mechanism is arranged to be a plurality of grid plates, the grid plates are hinged to the cover steel groove, when the pressure of gas in the accommodating body is small, smoke is discharged from the smoke suction pipe, if the pressure in the accommodating body is large, the smoke in the accommodating body can be slowly accumulated at the moment when the discharge speed of the smoke pipe is smaller than the new increment of the smoke in the accommodating body, the pressure is gradually increased, the cover plate can be flushed by the smoke for the existing integrated movable cover plate, the safety of operators is threatened, and in the cover plate structure provided by the invention, when the pressure in the accommodating body is large, the grid plates are stressed to rotate upwards, a gap is formed between the grid plates and the cover steel groove, part of smoke is released, the phenomenon that the cover plate is prevented from being flushed is achieved, when the pressure in the accommodating body is reduced, the grid plates are stressed by gravity or elastic force to rotate to restore to a sealed position, and the smoke suction pipe is collected at the moment.

In general, the slag-discharging flue gas recovery device for yellow phosphorus production provided by the embodiment of the invention is formed by splicing a plurality of grid plates with cover plates, and the grid plates are movably arranged to be matched with a smoke extraction pipe, so that the aim of avoiding risk of injury to operators caused by excessive water vapor in a slag pool and rapid expansion of gas in the slag pool and flushing of the cover plates is fulfilled.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a slag-discharging flue gas recovery device for yellow phosphorus production, which is provided by the embodiment of the invention;

fig. 2 is a schematic structural diagram of a slag-discharging flue gas recovery device for yellow phosphorus production according to an embodiment of the invention.

In the drawings, the reference numerals and corresponding part names:

1-accommodating body, 2-cover plate, 3-smoke extraction pipe, 4-grid plate, 5-cover steel tank, 6-exhaust pipe, 7-side door, 8-slag discharge steel tank, 9-top door, 10-pipeline mechanism, 100-slag pool mechanism and 200-slag discharge mechanism.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Examples

As shown in fig. 1-2, an embodiment of the present invention provides a yellow phosphorus production slag-discharging flue gas recovery device, which comprises a slag discharging mechanism 200 and a slag pool mechanism 100, wherein the slag discharging mechanism 200 is used for discharging waste slag in the yellow phosphorus production process and delivering the waste slag into the slag pool mechanism 100, the slag pool mechanism 100 is used for storing and stacking the waste slag delivered by the slag discharging mechanism 200, the slag pool mechanism 100 comprises a containing body 1 and a cover plate 2, a smoke extraction pipe 3 is communicated with the containing body 1, the cover plate 2 can be movably covered on the containing body 1, a sealed containing cavity is formed by the containing body 1 and the cover plate 2, and the slag pool mechanism 100 is communicated with the slag discharging mechanism 200.

Specifically, the container 1 is a structure for containing high temperature slag, and is generally a large container or tank, and the specific shape and size are not limited herein, and may be designed according to actual production or demand. The holding body 1 is connected with the smoke extraction pipe 3, so that generated smoke can smoothly enter the smoke extraction pipe 3, the smoke is prevented from polluting the environment, the human body is injured or resources are wasted, the smoke can be recycled and discharged after being treated, and the existing smoke treatment technology can be adopted, so that the smoke treatment technology is not excessively described.

The cover plate 2 is a structure covering the accommodating body 1, and can be movably covered on the accommodating body 1, the mobility of the cover plate 2 can be opened when needed, the slag discharging operation is convenient, meanwhile, the accommodating body 1 can be sealed during normal operation, corrosive hot steam generated by a water quenching process is prevented from leaking into the environment and a large amount of heat energy is wasted, and when the cover plate 2 is covered on the accommodating body 1, a sealed accommodating chamber is formed. The structure prevents corrosive hot steam generated by the water quenching process from leaking to the environment and a great amount of heat energy from being wasted, thereby reducing the potential harm to the environment and personnel. The slag bath mechanism 100 is in communication with the slag bath mechanism 200, either directly or through a pipe or other connection, which ensures that the slag bath mechanism 200 can deliver high temperature slag to the slag bath mechanism 100 for subsequent processing and discharge.

The key point of the invention is that the cover plate 2 comprises a plurality of grid plates 4 which are spliced, the middle of each grid plate 4 is separated by a cover steel groove 5, one end of each grid plate 4 is hinged with the cover steel groove 5, the other end is in a free state, and when the pressure in the accommodating cavity is less than or equal to atmospheric pressure, each grid plate 4 is sealed with the cover steel groove 5. In particular, the cover plate 2 is made up of a plurality of panels 4, which panels 4 are interconnected to form a unitary cover plate 2 structure, with one end of each panel 4 being hinged to the cover steel channel 5, which means that by means of the hinged connection the panels 4 are movable relative to the cover steel channel 5, with the other end of the panel 4 being free, i.e. the end is not directly connected to any support structure, and the complaints being such that the panels 4 are relatively free to move under certain conditions, in which embodiment the movement of the panels 4 is achieved by rotation about the cover steel channel 5, i.e. the cover steel channel 5 is an assembly of connected panels 4, located in the middle of each panel 4, separating adjacent panels 4, the cover steel channel 5 allowing the panels 4 to hinge at one end, providing rotational support to the panels 4.

In the operation process, when the slag discharging mechanism 200 discharges high-temperature slag to the slag bath mechanism 100, corrosive smoke and heat energy of the slag bath mechanism 100 are gradually accumulated due to the water quenching effect, and at the moment, the smoke is discharged from the smoke discharging pipe 3 only, and along with the gradual increase of the slag discharging amount in the slag bath mechanism 100, the smoke increasing speed in the slag bath mechanism 100 is also gradually increased, and the smoke discharging capacity of the smoke discharging pipe 3 is limited, so that the smoke amount in the slag bath mechanism 100 is gradually increased even if smoke is continuously discharged, so that the pressure in the slag bath mechanism 100 is continuously increased. In the recovery device provided by the embodiment of the invention, when the pressure in the accommodating cavity is less than or equal to atmospheric pressure, each grid plate 4 is sealed with the steel cover groove 5, and the sealing state is realized by the gravity of the grid plate 4, and of course, a spring can be arranged in the hinged structure, so that the sealing between the grid plate 4 and the steel cover groove 5 can be realized under the action of the elastic force. This structure ensures that the grid plates 4 can form an effective seal with the steel cover channels 5 under appropriate pressure conditions, thereby preventing leakage of harmful gases and water vapor. When the pressure in the accommodating chamber is continuously increased to be equal to the gravity of the cover plate 2, the cover plate 2 has the risk of being knocked over when the pressure generated on the cover plate 2 is increased, however, due to the unique structure of the invention, the pressure of the flue gas in the accommodating chamber can push the grid plate 4 to rotate in advance, so that the free end of the grid plate 4 is separated from the cover steel groove 5, a gap is generated, and the flue gas in the slag bath mechanism 100 can be partially discharged from the gap, so that the pressure in the slag bath mechanism 100 is reduced, and the cover plate 2 is prevented from being knocked over.

It should be noted that, the shape of the grid plates 4 is not limited herein, and may be specifically designed according to the volume or structure of the actual operation, and similarly, the number of the grid plates 4 is not limited herein, so that, for convenience of understanding, in the embodiment of the present invention, the accommodating body 1 of the slag pool mechanism 100 is set to a cuboid structure, the cover plate 2 is set to a rectangular structure, the grid plates 4 may be set to four in each row, and a total of eight rows, that is, 32 grid plates 4 are set, and during the actual operation, the critical pressure for rotation of each grid plate 4 may be set to be different, so that the opening number of the grid plates 4 may be limited by the pressure in the accommodating body 1, and the purpose of reducing the exhaust of the flue gas from the gaps of the grid plates 4 as much as possible under the condition that the cover plate 2 is not turned over is ensured.

Meanwhile, in the aspect of reducing the emission of the smoke from the gaps of the grid plate 4, the embodiment of the invention also limits the upward rotation critical point of the grid plate 4, and in the actual operation process, the adjustment can be performed according to the combination of the gravity of the grid plate 4, the hinging resistance, the elasticity of the springs and the like, and the limitation of the embodiment of the invention is as follows: when the upward thrust of the flue gas in the accommodating chamber to the cover plate 2 is equal to the sum of the gravity of the cover plate 2 and the friction between the cover plate 2 and the accommodating body 1, a gap is formed between the grid plate 4 and the cover steel groove 5. This structure is designed according to a balance of forces, in particular when the fumes inside the containing chamber exert an upward thrust on the cover plate 2, this thrust will try to lift the cover plate 2. The gravity of the cover plate 2 itself is downward, trying to pull the cover plate 2 back to its original position, there is a friction force on the surface of the cover plate 2 in contact with the containing body 1. The direction of this friction force is to hinder the movement of the cover plate 2, opposite to the direction of movement of the cover plate 2. When the sum of the pushing force of the flue gas to the cover plate 2, the gravity of the cover plate 2 and the friction between the cover plate 2 and the accommodating body 1 reaches balance, a gap is formed between the grid plate 4 and the cover steel groove 5. The structure can avoid the grid plate 4 from being opened prematurely, and can play the role of reducing the discharge of the flue gas from the gaps of the grid plate 4.

Further, the slag discharging mechanism 200 is provided with the exhaust pipe 6, so as to effectively remove part of the flue gas before the waste slag enters the slag bath mechanism 100, so as to reduce the flue gas burden of the slag bath mechanism 100, and similarly, the exhaust pipe 6 is communicated with a subsequent waste gas treatment unit for purification or recovery. The extraction duct 6 is typically connected to an extraction device, such as a blower or an air extractor. These devices create a negative pressure causing the exhaust gas in the slag extractor 200 to be drawn into the ductwork. As a preferred embodiment of the present invention, the suction pipe 6 may be installed at the top of the slag discharging mechanism 200. The mounting on top can take advantage of the direction of the natural air flow so that the exhaust gas more easily enters the exhaust pipe 6 without the need for additional booster equipment. This design also helps to prevent the retention of exhaust gases within the slag extractor 200, while the exhaust pipe 6 is located at the top of the slag extractor 200, generally away from the operator's work area, which helps to reduce direct contact of the operator with the harmful gases. The top mounting reduces the risk of clogging of the exhaust gas in the pipe, and the exhaust gas flows upwards with generally less sediment and solid particles, thus reducing the risk of clogging of the pipe.

Further, the side surface of the slag discharging mechanism 200 is hinged with a plurality of side doors 7, and when the side doors 7 are closed, the slag discharging mechanism 200 is in a sealed state. Specifically, through the design of the side door 7, the operator can easily enter or observe the interior of the slag discharging mechanism 200 to perform inspection and maintenance of slag discharging, when the side door 7 is closed, the slag discharging mechanism 200 is in a sealed state, that is, in the slag discharging process, the structure helps to prevent harmful gas, smoke or other waste gas from leaking into the surrounding environment, and at this time, the smoke can only enter the slag pool structure through waste slag or be discharged from the exhaust pipe 6, thereby ensuring protection of the environment and the operator. When the slag is discharged, the inside of the slag discharging mechanism 200 is cleaned, the side door 7 can be opened at this time, operators enter the inside of the slag discharging mechanism 200 to clean or maintain, and the structure ensures that the design of the side door 7 can periodically check and maintain the slag discharging mechanism 200 so as to ensure the normal operation and sealing performance of the side door 7. Helping to ensure the safety and environmental protection of the whole system.

In the embodiment of the invention, a slag discharging steel groove 8 is arranged at the top of the slag discharging mechanism 200, the top of the slag discharging mechanism 200 is sealed through a plurality of top doors 9, and the top doors 9 are clamped with the slag discharging steel groove 8. Specifically, the slag discharging steel groove 8 is located at the top of the slag discharging mechanism 200, is a groove-shaped structure along the length of the slag discharging mechanism 200, and is used for guiding a designated area where the top door 9 is clamped, the top door 9 is installed at the top of the slag discharging mechanism 200, and the inside of the slag discharging mechanism 200 can be conveniently observed through a plurality of top doors 9, so that the top door 9 can be rapidly opened for slag discharging inspection and maintenance operation when needed. The sealing state of the slag discharging mechanism 200 is realized through the clamping of the top door 9 and the slag discharging steel groove 8, which is helpful for preventing harmful gas, smoke or other waste gas from leaking into the surrounding environment and ensuring the safety of the environment and operators. During slag removal, which may be accompanied by a flow of molten slag at a higher temperature, the closed design of the top door 9 helps to prevent slag from splashing onto the surrounding environment or equipment. In general, the movable top door 9 facilitates the deslagging operation, and a worker can choose to open part or all of the top door 9 without opening the whole top structure, preferably, the top door 9 can be provided with an upward arch structure, when the top door 9 is subjected to thermal expansion deformation, the arch structure is easier to restore than a flat plate structure, the arch structure has better bearing capacity at the upper part, and the structure can better support the weight above the top door 9, such as equipment or other structures attached to the top door 9. The arch helps to prevent dust or other particulate matter from accumulating on the top door 9. Due to the arched geometry, dust tends to slide more easily, reducing the adhesion to the top door 9, while avoiding water accumulation, and also improving the overall structural stability of the top door 9, which helps to reduce deformation and ensure tightness, especially in the face of external forces or pressure variations.

Further, the side door 7 is provided with more than two side doors 7, and operators can select to open part or all of the side doors 7 by arranging more than two side doors 7 so as to adapt to different operation requirements, so that more flexible deslagging options are provided; importantly, the plurality of side doors 7 may improve the safety of the apparatus, for example, by restricting access to the interior of the slag discharging mechanism 200 by an operator by closing one of the side doors 7, thereby reducing the exposure to harmful gases. When the slag discharging mechanism 200 is required to be inspected or maintained, the arrangement of the plurality of side doors 7 can accelerate the maintenance and cleaning process of the equipment. The operator can more easily access the interior of the device without having to move the massive structure.

In the embodiment of the present invention, the slag discharging mechanism 200 communicates with the slag bath mechanism 100 through the pipe mechanism 10. The piping system is used to transfer the slag or other slag material generated by the slag extractor 200 to the slag bath mechanism 100, ensuring that the slag can effectively enter the subsequent processing stages, and if the slag extractor 200 and the slag bath mechanism 100 are located at different heights, the piping system can be designed to accommodate such differences in elevation, ensuring that the slag is smoothly transferred without obstruction. The arrangement of the conveying mechanism in the pipeline system can be helpful for more effectively conveying the slag discharge materials, the automation and the operation efficiency of the system are improved, and particularly, the conveying mechanism can be used for accurately controlling the slag discharge materials, including the conveying speed, the flow and the direction. This helps ensure that the slag discharge material is conveyed in the designed path and speed. Of course, in other embodiments, the conveying of the waste residue or other slag discharging materials may be realized by digging a slag discharging groove between the slag discharging mechanism 200 and the slag basin mechanism 100 instead of providing a pipe mechanism.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and that descriptions of well-known components and processing techniques and procedures are omitted so as not to unnecessarily limit the present invention.

Claims (10)

1. The slag discharge smoke recovery device for yellow phosphorus production comprises a slag discharge mechanism (200) and a slag pool mechanism (100), and is characterized in that the slag pool mechanism (100) comprises a containing body (1) and a cover plate (2), a smoke extraction pipe (3) is communicated with the containing body (1), the cover plate (2) is movably covered on the containing body (1), the containing body (1) and the cover plate (2) form a sealed containing cavity, and the slag pool mechanism (100) is communicated with the slag discharge mechanism (200);

the cover plate (2) comprises a plurality of grid plates (4) which are spliced, each grid plate (4) is divided by a cover steel groove (5), one end of each grid plate (4) is hinged with the cover steel groove (5), the other end of each grid plate is in a free state, and when the pressure in the accommodating cavity is less than or equal to the atmospheric pressure, each grid plate (4) is sealed with the cover steel groove (5).

2. The slag-off flue gas recovery device for yellow phosphorus production according to claim 1, wherein when the upward thrust of the flue gas in the accommodating cavity to the cover plate (2) is equal to the sum of the gravity of the cover plate (2) and the friction between the cover plate (2) and the accommodating body (1), a gap is formed between the grid plate (4) and the cover steel groove (5).

3. The yellow phosphorus production slag-off flue gas recovery device according to claim 1, wherein the slag-off mechanism (200) is provided with an exhaust pipe (6).

4. A yellow phosphorus production slag-off flue gas recovery device according to claim 3, wherein the extraction pipe (6) is mounted on top of the slag-off mechanism (200).

5. The yellow phosphorus production slag-off flue gas recovery device according to claim 1, wherein a plurality of side doors (7) are hinged on the side surface of the slag-off mechanism (200), and when the side doors (7) are closed, the slag-off mechanism (200) is in a sealing state.

6. The yellow phosphorus production slag-off flue gas recovery device according to claim 1, wherein a slag-off steel groove (8) is arranged at the top of the slag-off mechanism (200), the top of the slag-off mechanism (200) is sealed through a plurality of top doors (9), and the top doors (9) are clamped with the slag-off steel groove (8).

7. The yellow phosphorus production slag-discharging flue gas recovery device according to claim 6, wherein the top door (9) is of an upward arch structure.

8. The yellow phosphorus production slag-discharging flue gas recovery device according to claim 5, wherein the side door (7) is provided with more than two.

9. The yellow phosphorus production slag-off flue gas recovery device according to claim 1, wherein the slag-off mechanism (200) is in communication with the slag bath mechanism (100) via a pipe mechanism (10).

10. The yellow phosphorus production slag-discharging flue gas recovery device as claimed in claim 9, wherein a conveying mechanism is arranged in the pipeline mechanism (10).