CN109607481B - Emergency outlet of reaction furnace tail for hydrofluoric acid production process and reaction furnace - Google Patents
Emergency outlet of reaction furnace tail for hydrofluoric acid production process and reaction furnace Download PDFInfo
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- CN109607481B CN109607481B CN201910016751.5A CN201910016751A CN109607481B CN 109607481 B CN109607481 B CN 109607481B CN 201910016751 A CN201910016751 A CN 201910016751A CN 109607481 B CN109607481 B CN 109607481B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 77
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 230000007704 transition Effects 0.000 claims abstract description 103
- 239000002893 slag Substances 0.000 claims abstract description 72
- 238000007599 discharging Methods 0.000 claims abstract description 47
- 239000010440 gypsum Substances 0.000 claims abstract description 47
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims description 32
- 239000013049 sediment Substances 0.000 claims description 8
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 7
- 239000010962 carbon steel Substances 0.000 claims description 7
- 229910000856 hastalloy Inorganic materials 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000843 powder Substances 0.000 description 22
- 239000007789 gas Substances 0.000 description 15
- 230000000903 blocking effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/19—Fluorine; Hydrogen fluoride
- C01B7/191—Hydrogen fluoride
- C01B7/192—Preparation from fluorspar
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Furnace Details (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a reaction furnace tail emergency outlet for a hydrofluoric acid production process, which comprises a furnace tail cover communicated with an inner cavity of a reaction furnace, wherein an emergency discharge pipe for emergently discharging gas in the reaction furnace is arranged at the top of the furnace tail cover, a slag discharge pipe for discharging gypsum in the reaction furnace is arranged at the bottom of the furnace tail cover, the emergency discharge pipe comprises a horizontally arranged discharge main pipe and a transition pipe for guiding gas to the discharge main pipe, one end of the transition pipe is communicated with the top of the furnace tail cover, the other end of the transition pipe is communicated with the discharge main pipe, and an emergency discharge valve for controlling the on-off of the emergency discharge pipe is arranged on the discharge main pipe or the transition pipe. The invention also discloses a reaction furnace for the hydrofluoric acid production process, which comprises a furnace end, a furnace body and a furnace tail, wherein the furnace tail is provided with the furnace tail emergency outlet. The furnace tail emergency outlet and the reaction furnace have the advantages of reliable use, effective reduction of maintenance and replacement time and cost and the like.
Description
Technical Field
The invention belongs to the technical field of hydrofluoric acid production, and particularly relates to a reaction furnace tail emergency outlet for a hydrofluoric acid production process and a reaction furnace.
Background
In the production process of hydrofluoric acid, an internal slag returning reaction furnace is often adopted as a reaction device to prepare hydrogen fluoride gas, fluorite and sulfuric acid are continuously added into the reaction furnace according to a proportion to realize continuous production as reaction raw materials during operation, an emergency outlet is usually arranged at the tail end of the internal slag returning reaction furnace, and when an emergency accident or abnormal working condition occurs, such as blockage and the like of the internal slag returning reaction furnace, the emergency outlet can discharge gas escaping from the reaction furnace and then is sent to an absorption and purification device for treatment.
The existing emergency outlet of the furnace tail is an emergency discharge pipe which is directly communicated with the sealing cover of the furnace tail, a valve is arranged on the emergency discharge pipe, the valve is closed under normal working conditions, the emergency discharge pipe is in a closed state, when abnormal working conditions occur, the valve is opened to be communicated with the emergency discharge pipe, and gas in the reaction furnace can be discharged from the emergency discharge pipe. Because the sealed cowling of furnace end is one and has had the environment of high corrosive gas and mingled with a large amount of dust, and the valve is short in service life under such environment, need stop the material and change after reaching life, and the maintenance is changed complicatly, has influenced normal production, and the dust still can lead to urgent exhaust pipe to block up or the valve is dead to be inefficacy simultaneously, can't be fast effectively with gaseous discharge when needs urgent emission, exists certain potential safety hazard. Therefore, the existing furnace tail emergency outlet has the defects of unreliable use, difficult repair, high maintenance cost, long time and the like.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects existing in the prior art and providing the reaction furnace tail emergency outlet and the reaction furnace for the hydrofluoric acid production process, which are reliable in use and effectively reduce maintenance and replacement time and cost.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the utility model provides an urgent export of reaction furnace tail for hydrofluoric acid production technology, includes the tail cover that is linked together with the inner chamber of reaction furnace, the top of tail cover is equipped with and is used for urgent emission gaseous urgent exhaust pipe in the reaction furnace, the bottom of tail cover is equipped with and is used for with gypsum exhaust scum pipe in the reaction furnace, urgent exhaust pipe is including the discharge main pipe that the level set up and be used for leading gas to the transition pipe of discharge main pipe, the one end of transition pipe with the top intercommunication of tail cover, the other end and the discharge main pipe intercommunication of transition pipe, be equipped with the urgent exhaust valve that is used for controlling urgent exhaust pipe break-make on the discharge main pipe or the transition pipe.
The emergency outlet of the furnace tail is characterized in that the transition pipe comprises a transition vertical pipe and a transition inclined pipe, wherein the transition vertical pipe is vertically arranged, the transition inclined pipe is obliquely arranged, one end of the transition vertical pipe is directly communicated with the top of the furnace tail cover, the other end of the transition vertical pipe is sealed and sealed, one end of the transition inclined pipe is communicated with the transition vertical pipe, the other end of the transition inclined pipe is sealed and sealed, and one end of the discharge main pipe is communicated with the transition inclined pipe.
The furnace tail emergency outlet is characterized in that a vertical pipe opening is formed in the side face of the transition vertical pipe, the transition inclined pipe is communicated with the transition vertical pipe through the vertical pipe opening, an inclined pipe opening is formed in the side face of the transition inclined pipe, and the discharge main pipe is communicated with the transition inclined pipe through the inclined pipe opening.
In the above furnace tail emergency outlet, preferably, the emergency discharge valve is a hastelloy bell valve, and the hastelloy bell valve is disposed at a communication port between the transition standpipe and the furnace tail cover.
In the above furnace tail emergency outlet, preferably, the emergency discharge valve is a carbon steel butterfly valve, and the butterfly valve is disposed on the main discharge pipe.
The emergency outlet of the furnace tail is preferable, the butterfly valve comprises a valve body, a valve rod and a butterfly plate, wherein the valve rod is close to the junction of the valve body and the butterfly plate, and the valve rod penetrates through the butterfly plate along the radial direction of the butterfly plate.
In the above furnace tail emergency outlet, preferably, the opening direction of the butterfly plate is the same as the material flow direction in the main discharge pipe.
The furnace tail emergency outlet is preferably arranged in a furnace, and the closed ends of the transition vertical pipe and the transition inclined pipe are sealed and closed by blind plates.
The above-mentioned tail emergency outlet, preferably, the slag discharging pipe is vertically arranged and is directly communicated with the bottom of the tail cover.
The invention also provides a reaction furnace for the hydrofluoric acid production process, which comprises a furnace head, a furnace body and a furnace tail, wherein the furnace tail is provided with the furnace tail emergency outlet.
The reaction furnace is characterized in that the furnace tail end is provided with a furnace tail end cover, the furnace tail end cover is provided with a furnace tail gypsum slag discharging device, the furnace tail gypsum slag discharging device comprises a slag discharging port, a spiral discharging device and a material ladle, the slag discharging port is arranged at the center of the furnace tail end cover of the reaction furnace, the spiral discharging device is connected with the slag discharging port, the material ladle is arranged on the inner side surface of the furnace tail end cover and comprises an outlet end and an inlet end for scooping gypsum slag in the reaction furnace, the outlet end of the material ladle is communicated with the slag discharging port, and a guide plate for guiding and discharging the gypsum slag is arranged at the outlet end of the material ladle and is obliquely arranged.
In the reaction furnace, preferably, the ladle comprises a first side plate, a second side plate and a third side plate, wherein the first side plate and the second side plate are arranged at intervals, one side of the first side plate and one side of the second side plate are fixedly connected with the furnace tail end cover, two sides of the third side plate are fixedly connected with the other sides of the first side plate and the second side plate respectively, the first side plate, the second side plate and the third side plate are fixedly connected with the guide plate at one end, close to the slag discharge port, of the first side plate, the second side plate, the third side plate and the guide plate are enclosed to form a hollow discharge channel for circulating and discharging gypsum slag.
In the above reaction furnace, preferably, a baffle plate for preventing the gypsum slag from flowing back is provided on the slag discharge port.
In the above reaction furnace, preferably, two sides of the deflector are fixedly connected with the first side plate and the second side plate respectively, one end of the deflector is fixedly connected with the third side plate, and the other end of the deflector is fixedly connected with the baffle.
In the above reaction furnace, preferably, the included angle α between the deflector and the horizontal plane is 55 ° to 65 °.
In the above reaction furnace, preferably, the deflector is an arc plate protruding toward the outer side of the hollow discharge channel.
In the above reaction furnace, preferably, one ends of the second side plate and the third side plate extend to the inner wall of the reaction furnace barrel, and a space is reserved between one end of the first side plate and the inner wall of the reaction furnace barrel.
In the reaction furnace, preferably, the diameter of the furnace tail cover is D, and the distance between the first side plate and the second side plate is (0.14-0.17) D.
Compared with the prior art, the invention has the advantages that:
the emergency exhaust pipe comprises the exhaust main pipe and the transition pipe which are communicated, the emergency exhaust valve is arranged on the exhaust main pipe or the transition pipe and can control the on-off of the emergency exhaust pipe, the transition pipe can play a guiding role for lighter-weight gas, the transition pipe can guide the lighter-weight gas into the exhaust main pipe for subsequent treatment, and for powder in the tail cover, the powder is difficult to pass through the transition pipe to reach the exhaust main pipe due to the heavier-weight powder, most of floating powder is intercepted by the transition pipe and then falls back to the tail cover, so that the blockage of the emergency exhaust pipe is effectively avoided.
Drawings
Fig. 1 is a schematic diagram showing the front view of the reaction furnace for the hydrofluoric acid production process of example 1.
Fig. 2 is a schematic diagram showing the structure of the emergency exit of the reaction furnace tail according to example 1.
FIG. 3 is a schematic diagram showing the construction of a reaction furnace tail gypsum slag discharging apparatus according to example 1.
FIG. 4 is a schematic side view of the reaction furnace tail gypsum slag discharging apparatus of example 1.
FIG. 5 is a schematic view showing the structure of an emergency exit of the tail of the reaction furnace in example 2.
Legend description:
1. a furnace tail cover; 2. an emergency discharge pipe; 21. a discharge main pipe; 22. a transition pipe; 221. a transition standpipe; 222. a transition inclined tube; 3. a slag discharge pipe; 4. an emergency discharge valve; a. a burner; b. a furnace body; c. a furnace tail; b1, a slag discharging port; b11, a baffle plate; b2, a spiral discharging device; b3, a material spoon; b31, a first side plate; b32, a second side plate; b33, a third side plate; b34, a guide plate; and b4, a furnace tail end cover.
Detailed Description
The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown, for the purpose of illustrating the invention, but the scope of the invention is not limited to the specific embodiments shown.
Example 1:
as shown in fig. 1, the embodiment provides a reaction furnace for a hydrofluoric acid production process, which comprises a furnace end a, a furnace body b and a furnace tail c, wherein a furnace tail emergency outlet is arranged at the furnace tail c, and the furnace tail emergency outlet is convenient for discharging and treating hydrogen fluoride gas in the reaction furnace under abnormal emergency working conditions.
As shown in fig. 2, the emergency outlet of the reaction furnace tail of the embodiment comprises a furnace tail cover 1 communicated with the inner cavity of the reaction furnace, an emergency discharge pipe 2 for discharging the gas in the reaction furnace in an emergency way is arranged at the top of the furnace tail cover 1, a slag discharge pipe 3 for discharging gypsum in the reaction furnace is arranged at the bottom of the furnace tail cover 1, the emergency discharge pipe 2 comprises a discharge main pipe 21 horizontally arranged and a transition pipe 22 for guiding the gas to the discharge main pipe 21, one end of the transition pipe 22 is communicated with the top of the furnace tail cover 1, the other end of the transition pipe 22 is communicated with the discharge main pipe 21, and an emergency discharge valve 4 for controlling the on-off of the emergency discharge pipe 2 is arranged on the discharge main pipe 21 or the transition pipe 22. The emergency discharge valve 4 can control the on-off of the emergency discharge pipe 2, the gas transition pipe 22 can guide the gas transition pipe 22 into the discharge main pipe 21 for discharge, the transition pipe 22 can play a role in intercepting solid powder particles floating in the tail cover 1, the solid powder particles are prevented from entering the discharge main pipe 21 to cause blocking, the powder entering the transition pipe 22 also slides back into the tail cover 1, and the emergency discharge pipe 2 is in a smooth state and is not blocked.
In this embodiment, the transition pipe 22 includes a transition standpipe 221 vertically disposed and a transition inclined pipe 222 obliquely disposed, one end of the transition standpipe 221 is directly connected to the top of the tail hood 1, the other end of the transition standpipe 221 is sealed and closed, one end of the transition inclined pipe 222 is connected to the transition standpipe 221, the other end of the transition inclined pipe 222 is sealed and closed, and one end of the main discharge pipe 21 is connected to the transition inclined pipe 222. The vertical setting of transition standpipe 221 is at the top of furnace tail cover 1, and the gas discharge of being convenient for not only, and vertical setting can also cut off most showy powder, and the powder is difficult to adhere to on the wall and only can the roll-off back in the furnace tail cover 1, even if there is a small amount of powder to get into transition inclined tube 222, the inclined setting's transition inclined tube 222 also can effectively block this part of powder, the powder that falls can follow the wall landing roll-off back in the furnace tail cover 1 of slope, adopt the structure of transition standpipe 221 and transition inclined tube 222 basically can avoid the powder to get into the main emission pipe 21 and cause the knot to die or stop up, guarantee the unblock of urgent discharge pipe 2.
In this embodiment, a vertical pipe opening is formed on the side surface of the transition vertical pipe 221, the transition inclined pipe 222 is communicated with the transition vertical pipe 221 through the vertical pipe opening, an inclined pipe opening is formed on the side surface of the transition inclined pipe 222, and the main discharge pipe 21 is communicated with the transition inclined pipe 222 through the inclined pipe opening. The top end of the transition standpipe 221 is closed, and is communicated with the transition inclined tube 222 in a form of a side opening, the closed top end can play a role in intercepting powder, and the top end of the transition inclined tube 222 is also closed and is communicated with the discharge main tube 21 in a form of a side opening, so that the powder interception effect can be improved.
In this embodiment, the emergency discharge valve 4 is a carbon steel butterfly valve, and the butterfly valve is disposed on the discharge main pipe 21. The carbon steel butterfly valve can effectively block and seal the emergency discharge pipe, and has the advantages of low cost, convenience and easiness in maintenance and replacement, and the like, because the carbon steel butterfly valve is installed and arranged on the discharge main pipe 21 horizontally arranged, the transition vertical pipe 221 and the transition inclined pipe 222 can intercept most of powder, so that valve failure caused by excessive powder blocking on the carbon steel butterfly valve is avoided, the influence of dust in the furnace tail cover on the emergency discharge valve is greatly reduced, the service life of the carbon steel butterfly valve is prolonged, the emergency discharge valve is arranged on the horizontal discharge main pipe for convenient replacement and maintenance, the maintenance time is shortened, the effective production time is prolonged, and the improvement of yield and benefit is facilitated.
In this embodiment, the butterfly valve includes valve body, valve rod and butterfly plate, and the valve rod is close to the juncture setting of valve body and butterfly plate, and the radial butterfly plate that passes of valve rod along the butterfly plate. Adopt eccentric structure's butterfly valve, the valve rod setting is in the position that is close to discharge main pipe 21 pipe wall department, compares in the butterfly valve that sets up in central point, and impurity such as powder are difficult for the knot to die the valve rod department that lies in both sides, and the reliability is better.
In this embodiment, the butterfly plate opens in the same direction as the flow of material in the main discharge pipe 21. The same setting of flow direction can have a washing effect to the material of dish board department when the material flows, wash away powder material backward and avoid tying and lead to sealed not tight or the action inflexible on the dish board.
In this embodiment, the closed ends of the transition standpipe 221 and the transition chute 222 are sealed and closed by blind plates. The blind plates at the closed ends of the transition vertical pipe 221 and the transition inclined pipe 222 can play a role in improving the effect of blocking powder, and when cleaning or overhauling is needed, the blind plates can be quickly removed to treat the interiors of the transition vertical pipe 221 and the transition inclined pipe 222.
In this embodiment, a blind plate is disposed on the transition chute 222 at a position between the connection end of the transition chute 222 and the transition standpipe 221 and the chute opening. Specifically, the main discharge pipe 21 and part of the transition inclined pipe 222 can be separated from the tail cover 1 by the blind plate, so that the pipeline at the rear end can be temporarily inspected and maintained.
In the embodiment, the slag discharging pipe 4 is vertically arranged and is directly communicated with the bottom of the furnace tail cover 2. This arrangement facilitates the removal of gypsum residue.
As shown in fig. 3 and 4, the reaction furnace of this embodiment is further provided with a tail end cover b4 at the tail c, the tail end cover b4 is provided with a tail gypsum slag discharging device, the tail gypsum slag discharging device comprises a slag discharging port b1, a spiral discharging device b2 and a ladle b3, the slag discharging port b1 is arranged at the central position of the tail end cover b4 of the reaction furnace, the spiral discharging device b2 is connected with the slag discharging port b1, the ladle b3 is arranged on the inner side surface of the tail end cover b4, the ladle b3 comprises an outlet end and an inlet end for scooping up gypsum slag in the reaction furnace, the outlet end of the ladle b3 is communicated with the slag discharging port b1, a deflector b34 which is convenient for discharging the gypsum slag is arranged at the outlet end of the ladle b3, and the deflector b34 is obliquely arranged. Specifically, the outlet end of the spiral discharging device b2 is communicated with the inlet end of the tail cover 1. When the reaction furnace runs, the reaction furnace rotates 360 degrees around the axis of the reaction furnace, meanwhile, gypsum slag generated by the reaction is pushed to the furnace tail c of the reaction furnace, the reaction furnace rotates to drive the furnace tail gypsum slag discharging device to rotate, when the material spoon b3 rotates to the lower part, the inlet end of the material spoon b3 is used for shoveling the gypsum slag sunk at the bottom of the reaction furnace into the material spoon b3, along with the continuous rotation of the reaction furnace, the material spoon b3 rotates to the upper part, the gypsum slag in the shoveling material spoon b3 slides to the outlet end of the material spoon b3 from the inlet end of the material spoon b3 under the action of gravity, the gypsum slag can quickly slide into the slag discharging port b1 and then enter the spiral slag discharging device b2 to be discharged under the guidance of the guide plate b34, the problems of blocking and death caused by accumulation of the slag discharging port b1 are avoided, the problem that the gypsum slag can be shoveled up is limited, the problem that the slag leaks out from the rest material spoon b3 is thoroughly solved, and the discharging efficiency is improved.
In this embodiment, the ladle b3 includes a first side plate b31, a second side plate b32 and a third side plate b33, where the first side plate b31 and the second side plate b32 are arranged at intervals and one side of each side plate is fixedly connected to the tail end cover b4, two sides of the third side plate b33 are fixedly connected to the other sides of the first side plate b31 and the second side plate b32, one ends of the first side plate b31, the second side plate b32 and the third side plate b33, which are close to the slag discharge port b1, are fixedly connected to the guide plate b34, and the first side plate b31, the second side plate b32, the third side plate b33 and the guide plate b34 enclose and form a hollow discharge channel for circulating and discharging gypsum slag. Specifically, the first side plate b31 and the second side plate b32 are arranged in parallel, the distance between the first side plate b31 and the second side plate b32 is larger than the width of the slag discharge port b1, the slag discharge port b1 is completely covered in the ladle b3, the first side plate b31, the second side plate b32, the third side plate b33 and the guide plate b34 enclose to form a cuboid hollow discharge channel, gypsum slag is scooped up from the inlet end of the ladle b3 and enters the hollow discharge channel, then flows to the outlet end of the ladle b3 and is discharged from the slag discharge port b1, and the hollow discharge channel can effectively prevent the scooped gypsum slag from falling back to the bottom of the reaction furnace, so that the discharge efficiency is improved.
In this embodiment, a baffle b11 for preventing the back flow of gypsum slag is provided at the slag discharge port b 1. Specifically, the baffle b11 is a flat plate covering a portion of the slag discharge opening b 1. If no baffle is arranged, when excessive gypsum slag is gathered at the slag discharge port b1, the spiral discharging device b2 can discharge all the gypsum slag less quickly, partial gypsum slag can be pressed backwards to cause blocking during pushing and feeding, the baffle b11 can prevent the excessive gypsum slag gathered at the slag discharge port b1, the blocking caused by the blocking of a material spoon is avoided, and the discharging efficiency is improved.
In this embodiment, two sides of the deflector b34 are respectively fixedly connected with the first side plate b31 and the second side plate b32, one end of the deflector b34 is fixedly connected with the third side plate b33, and the other end of the deflector b34 is fixedly connected with the baffle b11. The guide plate b34 is in sealing connection with the first side plate b31, the second side plate b32 and the third side plate b33, so that gypsum slag in the material spoon b3 is prevented from leaking back to the reaction furnace, meanwhile, the guide plate b34 is matched with the baffle plate b11, the outlet end of the material spoon is prevented from being blocked by binding, and the discharging efficiency is improved.
In this embodiment, the angle α between the baffle b34 and the horizontal plane is 60 °. The volume of the hollow discharging channel of the material spoon b3 is reduced due to the overlarge included angle alpha, the amount of the scooped gypsum slag is reduced, the flow guiding effect of the flow guiding plate b34 is poor due to the overlarge included angle alpha, the gypsum slag cannot be effectively guided to the slag discharging port b1, and the gypsum slag is accumulated at the flow guiding plate b 34.
In this embodiment, the deflector b34 is an arc plate protruding toward the outside of the hollow discharge passage. Specifically, when the ladle b3 rotates to the upper part of the reaction furnace, the arc plate protruding outwards is in a shape with two high sides and a low middle, and two sides of the arc plate are symmetrical about the lowest middle. Adopt arc structure water conservancy diversion effect better, not only can guide the gypsum sediment in the material spoon b3 to sediment mouth b1 department, compare in the flat board, the guide plate b34 of arc plate structure can also be with the gypsum sediment of both sides eminence to middle gathering, makes the gypsum sediment be in the state that flows as far as, avoids staying for a long time and causes the dead problem of knot.
In this embodiment, one end of the second side plate b32 and one end of the third side plate b33 extend to the inner wall of the reaction furnace barrel, and a space is left between one end of the first side plate b31 and the inner wall of the reaction furnace barrel. The first side plate b31 is shorter, so that a feeding hole for shoveling gypsum slag into the hollow discharging channel is formed in the interval between the first side plate b31 and the inner wall of the reaction furnace cylinder, and the second side plate b32 and the third side plate b33 are longer, so that more gypsum slag can be shoveled up per rotation.
In this embodiment, the diameter of the furnace tail end cover b4 is 3.5m, and the distance between the first side plate b31 and the second side plate b32 is 0.55m, i.e., the width of the hollow discharge passage is 0.55m. The excessive distance between the first side plate b31 and the second side plate b32 can lead to that gypsum slag is not discharged from the slag discharge port b1, gypsum is accumulated in the material spoon b3 for a long time to generate dead blocking, the excessive distance can lead to that the amount of the gypsum slag which can be scooped up and discharged each time is limited, and the distance between the first side plate b31 and the second side plate b32 is controlled within the range to ensure that materials can be discharged sufficiently and timely.
Example 2:
the reaction furnace for hydrofluoric acid production process of this embodiment is basically the same as that of embodiment 1, except that the emergency discharge valve 4 of the tail emergency outlet of the reaction furnace is, as shown in fig. 5, in this embodiment, the emergency discharge valve 4 is a hastelloy bell valve, which is disposed at the communication port between the transition standpipe 221 and the tail cover 1. Specifically, the emergency discharge valve 4 is a C-4 hastelloy bell valve. The bell valve is arranged at the communication port of the transition vertical pipe 221 and the furnace tail cover 1, so that powder can be prevented from entering the emergency discharge pipe 2, the smoothness of the emergency discharge pipe 2 can be effectively ensured, when an emergency abnormal working condition occurs, the emergency discharge pipe 2 is opened by falling down of the valve body of the bell valve, gas is discharged from the emergency discharge pipe 2, and the transition vertical pipe 221 and the transition inclined pipe 222 can also play a role in blocking the powder from entering the discharge main pipe 21 when the gas is discharged in an emergency mode.
While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (9)
1. A reaction furnace tail emergency exit for hydrofluoric acid production technology which characterized in that: the furnace tail cover (1) is communicated with the inner cavity of the reaction furnace, an emergency discharge pipe (2) for emergently discharging gas in the reaction furnace is arranged at the top of the furnace tail cover (1), a slag discharge pipe (3) for discharging gypsum in the reaction furnace is arranged at the bottom of the furnace tail cover (1), the emergency discharge pipe (2) comprises a horizontally arranged discharge main pipe (21) and a transition pipe (22) for guiding gas to the discharge main pipe (21), one end of the transition pipe (22) is communicated with the top of the furnace tail cover (1), the other end of the transition pipe (22) is communicated with the discharge main pipe (21), and an emergency discharge valve (4) for controlling on-off of the emergency discharge pipe (2) is arranged on the discharge main pipe (21) or the transition pipe (22);
the transition pipe (22) is including the transition standpipe (221) of vertical setting and the transition inclined tube (222) of slope setting, the one end of transition standpipe (221) and the top direct communication of stove tail cover (1), the other end of transition standpipe (221) is sealed to be sealed, the one end and the transition standpipe (221) of transition inclined tube (222) are linked together, the other end of transition inclined tube (222) is sealed to be sealed, the one end of emission person in charge (21) with transition inclined tube (222) are linked together.
2. The tail gas emergency exit of claim 1, wherein: the side of transition standpipe (221) has seted up the standpipe opening, transition inclined tube (222) are through standpipe opening and transition standpipe (221) intercommunication, the inclined tube opening has been seted up to the side of transition inclined tube (222), discharge main pipe (21) are through inclined tube opening and transition inclined tube (222) intercommunication.
3. The tail gas emergency exit according to claim 1 or 2, characterized in that: the emergency discharge valve (4) is a hastelloy bell valve, and the hastelloy bell valve is arranged at a communication port of the transition vertical pipe (221) and the furnace tail cover (1).
4. The tail gas emergency exit according to claim 1 or 2, characterized in that: the emergency discharge valve (4) is a carbon steel butterfly valve, and the butterfly valve is arranged on the discharge main pipe (21).
5. The tail gas emergency exit of claim 4, wherein: the butterfly valve comprises a valve body, a valve rod and a butterfly plate, wherein the valve rod is close to the junction of the valve body and the butterfly plate, and the valve rod penetrates through the butterfly plate along the radial direction of the butterfly plate.
6. The tail gas emergency exit of claim 5, wherein: the opening direction of the butterfly plate is the same as the material flow direction in the main discharge pipe (21).
7. The tail gas emergency exit of claim 1, wherein: the closed ends of the transition vertical pipe (221) and the transition inclined pipe (222) are sealed and closed by blind plates.
8. A reaction furnace for hydrofluoric acid production process, which is characterized in that: comprising a burner (a), a burner body (b) and a burner tail (c) provided with a burner tail emergency outlet according to any one of claims 1 to 7.
9. The reactor according to claim 8, wherein: the utility model provides a reaction furnace, including stove tail end cover (b 4), stove tail end cover (b 4) is last to be equipped with stove tail gypsum sediment device, stove tail gypsum sediment device includes slag tap (b 1), spiral discharging device (b 2) and a material spoon (b 3), slag tap (b 1) are seted up in the central point of reaction stove tail end cover (b 4), spiral discharging device (b 2) with slag tap (b 1) link to each other, material spoon (b 3) set up on the medial surface of stove tail end cover (b 4), material spoon (b 3) include the exit end and are used for scooping up the entry end of reaction furnace interior gypsum sediment, the exit end of material spoon (b 3) with slag tap (b 1) intercommunication, be equipped with on the exit end of material spoon (b 3) be convenient for with gypsum sediment water conservancy diversion exhaust guide plate (b 34), guide plate (b 34) slope sets up.
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