CN114642950A - Explosion-proof equipment is used in formaldehyde production - Google Patents
Explosion-proof equipment is used in formaldehyde production Download PDFInfo
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- CN114642950A CN114642950A CN202011523419.7A CN202011523419A CN114642950A CN 114642950 A CN114642950 A CN 114642950A CN 202011523419 A CN202011523419 A CN 202011523419A CN 114642950 A CN114642950 A CN 114642950A
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 230000007246 mechanism Effects 0.000 claims abstract description 50
- 238000010521 absorption reaction Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 239000007788 liquid Substances 0.000 claims description 37
- 238000011084 recovery Methods 0.000 claims description 30
- 238000009827 uniform distribution Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- 238000005273 aeration Methods 0.000 claims description 7
- 238000007865 diluting Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 238000004880 explosion Methods 0.000 abstract description 22
- 238000010790 dilution Methods 0.000 abstract description 3
- 239000012895 dilution Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 131
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 54
- 239000000243 solution Substances 0.000 description 34
- 239000007864 aqueous solution Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010572 single replacement reaction Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an explosion-proof device for formaldehyde production, which comprises an absorption tower, an explosion-proof tank, a tail gas incineration tower and a PLC (programmable logic controller), wherein the output end of the PLC is electrically connected with an electric control end of a tail gas inlet mechanism, an electric control end of a tail gas dilution mechanism, an electric control end of a tail gas conveying mechanism and an electric control end of a pressure relief mechanism; this scheme is passed through tail gas mechanism of admitting air, tail gas equipartition mechanism, tail gas dilution mechanism, tail gas conveying mechanism cooperation PLC controller and is effectively prevented that the combustible gas concentration in the explosion-proof tank from reaching the extreme value of explosion, perhaps explosion-proof tank pressure is too big and produce the phenomenon of explosion, improves production efficiency, guarantees safety in production.
Description
Technical Field
The invention relates to the technical field of formaldehyde production, in particular to an explosion-proof device for formaldehyde production.
Background
The present industrial formaldehyde is produced with methanol as material and through tail gas circulating process, and the tail gas after absorption is circulated to the reactor as heat stabilizer to reach the required thermodynamic equilibrium and safe production.
In the industry formaldehyde production process, the tail gas of production contains hydrogen, formaldehyde gas, methyl alcohol and a small amount of methane gas etc, industry formaldehyde tail gas direct discharge can cause environmental pollution, influence personnel healthy, and simultaneously, combustible gas directly discharges, can cause the potential safety hazard, consequently, adopt the mode of tail gas burning to handle more, in the tail gas that conveniently absorbs the tower exhaust enters into the burning furnace, and guarantee the security of pipeline, generally can set up explosion-proof tank between absorption tower and burning furnace, set up the water seal liquid in the explosion-proof tank, but still can produce the phenomenon of explosion when the combustible gas concentration who gets into in the explosion-proof tank reaches certain volume, therefore, we propose an explosion-proof equipment for formaldehyde production.
Disclosure of Invention
The invention aims to provide an explosion-proof device for formaldehyde production, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an explosion-proof equipment is used in formaldehyde production includes:
the system comprises an absorption tower, an explosion-proof tank, a tail gas incineration tower and a PLC (programmable logic controller), wherein the output end of the PLC is electrically connected with an electric control end of a tail gas inlet mechanism, an electric control end of a tail gas diluting mechanism, an electric control end of a tail gas conveying mechanism and an electric control end of a pressure relief mechanism;
the tail gas inlet mechanism comprises a tail gas inlet pipe, a tail gas uniform distribution mechanism is arranged at the bottom inside the anti-explosion tank, the top of the absorption tower is communicated with the tail gas uniform distribution mechanism through the tail gas inlet pipe, a first electromagnetic valve is fixedly installed on the outer wall of the tail gas inlet pipe, and differential pressure sensors are fixedly installed on the outer walls of the tail gas inlet pipes positioned on two sides of the first electromagnetic valve;
the tail gas diluting mechanism comprises a supporting plate, the supporting plate is fixedly arranged on the outer wall of the explosion-proof tank, the upper end of the supporting plate is fixedly provided with an air blower, and an air outlet of the air blower is communicated with the interior of the explosion-proof tank;
the tail gas conveying mechanism comprises a mounting plate, the mounting plate is fixedly mounted at the upper end of the outer wall of the explosion-proof tank, a negative pressure fan is fixedly mounted on the upper surface of the mounting plate, a tail gas outlet is formed in the upper end of the inner wall of the explosion-proof tank and communicated with a gas inlet of the negative pressure fan, and a gas outlet of the negative pressure fan is communicated with the tail gas incineration tower through a U-shaped liquid seal pipe;
the pressure relief mechanism comprises a pressure relief pipe and a pressure sensor, a pressure relief opening is formed in the top of the explosion-proof tank, a pressure relief electromagnetic valve is arranged on the outer wall of the pressure relief pipe and the outer wall of the pressure relief pipe, and the pressure sensor is fixedly installed on the inner top of the explosion-proof tank;
the tail gas equipartition mechanism includes tail gas inlet branch pipe, tail gas inlet branch pipe fixed mounting be in the inside of explosion-proof tank, tail gas inlet branch pipe's one end with the tail gas intake pipe is linked together, tail gas inlet branch pipe's the other end is sealed setting, tail gas inlet branch pipe's outer wall top fixed mounting has rotatory nozzle, tail gas inlet branch pipe's outer wall side fixed mounting has the aeration head.
By adopting the technical scheme, the tail gas entering the anti-explosion tank is quickly and uniformly dispersed through the tail gas uniform distribution mechanism, meanwhile, a large amount of air is blown into the anti-explosion tank through the air blower, the density of the tail gas is quickly reduced to a safe range, the protection efficiency is improved, moreover, the U-shaped liquid seal pipe is arranged between the anti-explosion tank and the tail gas incineration tower, the occurrence of a backfire drop condition is further reduced, when the pressure in the anti-explosion tank is rapidly increased, the temperature in the anti-explosion tank can not be reduced in a mode of reducing the blowing speed of the air blower and the tail gas absorption speed of the negative pressure fan, and the pressure value sensed by the pressure sensor in the anti-explosion tank is higher than a set anti-explosion limit value, the PLC controls the pressure relief electromagnetic valve to be opened, the gas in the anti-explosion tank is rapidly released, and the safe production is ensured;
through atomizer, level sensor, the third solenoid valve, solution recovery pump cooperation PLC controller, with remaining methyl alcohol gas in the tail gas, formaldehyde gas filters and stays in the water seal liquid, and rotatory nozzle is under the drive of atmospheric pressure, can drive the water seal liquid and rotate, increase water seal liquid and explosion-proof tank formaldehyde gas, methyl alcohol gas's area of contact, when the height of water seal liquid level is higher than level sensor's high value, open third solenoid valve and solution recovery pump in proper order through the PLC controller and dissolve explosion-proof tank in with formaldehyde, the aqueous solution of methyl alcohol is taken away, when the height of water seal liquid level is less than level sensor's low value, close third solenoid valve and solution recovery pump in proper order through the PLC controller, reduce the production material loss.
Preferably, the input end of the PLC controller is electrically connected with the differential pressure sensor and the pressure sensor, and the output end of the PLC controller is electrically connected with the electric control end of the first electromagnetic valve, the electric control end of the air blower, the electric control end of the pressure relief electromagnetic valve and the electric control end of the negative pressure fan.
Through adopting above-mentioned technical scheme, when the pressure value that differential pressure sensor sensed is lower, prevent that the inside of water seal liquid entering tail gas intake pipe in the explosion-proof jar, reduce the blast air speed through PLC controller control air-blower, reduce the pressure in the explosion-proof jar, accelerate tail gas absorption speed through PLC controller control negative-pressure air fan simultaneously, further fall the pressure difference value in pressure in the explosion-proof jar and the tail gas intake pipe to normal range, whole journey need not artifical the participation, improve protection efficiency, guarantee safety in production.
Preferably, a water inlet pipe is fixedly mounted at the upper end of the outer wall of the explosion-proof tank, a second electromagnetic valve is fixedly arranged on the outer wall of the water inlet pipe, a water inlet branch pipe is fixedly mounted at the upper end of the inner wall of the explosion-proof tank, an atomizing nozzle is fixedly mounted on the outer wall of the water inlet branch pipe, and an included angle formed between the atomizing nozzle and the vertical direction ranges from 15 degrees to 30 degrees.
Through adopting above-mentioned technical scheme, spun water smoke can be with formaldehyde gas, the methyl alcohol gas that does not dissolve in bottom water seal liquid solution in the tail gas, further purification filtration, then fall into explosion-proof tank bottom.
Preferably, a solution outlet is formed in the bottom of the explosion-proof tank, a solution recovery pipe is communicated with the outer side of the solution outlet, a third electromagnetic valve is fixedly mounted on the outer wall of the solution recovery pipe, and the other end of the solution recovery pipe is communicated with a water inlet of a solution recovery pump.
By adopting the technical scheme, after the residual formaldehyde gas and methanol gas in the tail gas enter one-step filtration through the water seal liquid, the aqueous solution dissolved with formaldehyde and methanol is sent to the raw material reaction tank for continuous use through the solution recovery pump, and the loss of production materials is reduced.
Preferably, the inner wall fixed mounting of explosion-proof tank has level sensor, the input of PLC controller with level sensor electric connection, the output of PLC controller with the automatically controlled end of second solenoid valve the third solenoid valve the automatically controlled end electric connection of solution recovery pump.
Through adopting above-mentioned technical scheme, when the height of water seal liquid level is higher than level sensor's high value, open third solenoid valve and solution recovery pump in proper order through the PLC controller and take away the water solution that has dissolved formaldehyde, methyl alcohol in the explosion-proof tank, when the height of water seal liquid level is less than level sensor's low value, close third solenoid valve and solution recovery pump in proper order through the PLC controller.
Preferably, the outer wall of the tail gas inlet branch pipe is fixedly connected with a connecting pipe, the outer wall of the connecting pipe is provided with an external thread, and the rotary nozzle is fixedly connected with the connecting pipe through a thread.
Through adopting above-mentioned technical scheme, install rotatory nozzle on tail gas inlet branch pipe through the mode of screw thread installation, when rotatory nozzle damaged, can single replacement, need not change whole tail gas equipartition mechanism, reduce the later maintenance cost.
Preferably, the tail gas inlet branch pipes provided with the rotary spray heads and the aeration heads are not less than three groups.
Through adopting above-mentioned technical scheme, swift effectual tail gas that will get into in the explosion-proof jar, even scattering in the explosion-proof jar.
Preferably, the bottom of the interior of the explosion-proof tank is provided with water seal liquid, and the distance from the top of the rotary spray head to the water seal liquid level is not less than 30 cm.
Through adopting above-mentioned technical scheme for tail gas can be abundant with water contact, avoid directly getting into the tail gas incineration tower through water filterable tail gas in, cause the waste.
Preferably, a filter screen is fixedly installed on the outer side of an air inlet of the air blower.
Through adopting above-mentioned technical scheme, effectively filter dust and other impurity in the outside air, prevent to get into explosion-proof tank's inside, cause the pollution.
Preferably, the outer wall of the explosion-proof tank is fixedly provided with a control box, and the PLC is fixedly arranged in the control box.
Through adopting above-mentioned technical scheme, install the PLC controller in the control box, effectively avoid the PLC controller to receive the influence of external dust, for the PLC controller provides good operational environment, guarantee its stable performance.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the tail gas inlet mechanism, the tail gas uniform distribution mechanism, the tail gas dilution mechanism and the tail gas conveying mechanism are matched with the PLC controller, so that the phenomenon that the concentration of inflammable gas in the explosion-proof tank reaches the limit value of explosion or the explosion is generated due to overhigh pressure of the explosion-proof tank is effectively prevented, the production efficiency is improved, and the safe production is ensured.
2. According to the invention, after the residual formaldehyde gas and methanol gas in the tail gas enter one-step filtration through the water seal liquid, the aqueous solution dissolved with formaldehyde and methanol is sent to the raw material reaction tank for continuous use through the solution recovery pump, so that the loss of production materials is reduced.
Drawings
FIG. 1 is a schematic structural view of an explosion-proof apparatus for formaldehyde production according to the present invention;
FIG. 2 is a sectional view of an explosion-proof tank of an explosion-proof apparatus for formaldehyde production according to the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic structural diagram of a tail gas uniform distribution mechanism of the explosion-proof device for formaldehyde production according to the invention;
FIG. 5 is a schematic view of a partial structure of an explosion-proof apparatus for formaldehyde production according to the present invention.
In the figure: 1. an absorption tower; 2. an explosion-proof tank; 3. a tail gas incineration tower; 4. a tail gas inlet pipe; 5. a differential pressure sensor; 6. a blower; 7. a negative pressure fan; 8. a water inlet pipe; 9. a second solenoid valve; 10. a solution recovery pipe; 11. a solution recovery pump; 12. a U-shaped liquid seal pipe; 13. a control box; 14. a filter screen; 15. a first solenoid valve; 16. a third electromagnetic valve; 17. a water inlet branch pipe; 18. a tail gas inlet branch pipe; 19. rotating the spray head; 20. mounting a plate; 21. a support plate; 22. a liquid level sensor; 23. a connecting pipe; 24. an aeration head; 25. a tail gas outlet; 26. a solution outlet; 27. an atomizing spray head; 28. a PLC controller; 29. A pressure sensor; 30. a pressure relief pipe; 31. a pressure relief solenoid valve; 32. a pressure relief port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution:
an explosion-proof equipment is used in formaldehyde production includes: the system comprises an absorption tower 1, an explosion-proof tank 2, a tail gas incineration tower 3 and a PLC (programmable logic controller) 28, wherein the output end of the PLC 28 is electrically connected with an electric control end of a tail gas inlet mechanism, an electric control end of a tail gas diluting mechanism, an electric control end of a tail gas conveying mechanism and an electric control end of a pressure relief mechanism;
specifically, the tail gas inlet mechanism comprises a tail gas inlet pipe 4, a tail gas uniform distribution mechanism is arranged at the bottom inside the explosion-proof tank 2, the top of the absorption tower 1 is communicated with the tail gas uniform distribution mechanism through the tail gas inlet pipe 4, a first electromagnetic valve 15 is fixedly installed on the outer wall of the tail gas inlet pipe 4, and differential pressure sensors 5 are fixedly installed on the outer walls of the tail gas inlet pipes 4 at two sides of the first electromagnetic valve 15;
specifically, the tail gas diluting mechanism comprises a supporting plate 21, the supporting plate 21 is fixedly installed on the outer wall of the explosion-proof tank 2, an air blower 6 is fixedly installed at the upper end of the supporting plate 21, and an air outlet of the air blower 6 is communicated with the interior of the explosion-proof tank 2;
specifically, the tail gas conveying mechanism comprises a mounting plate 20, the mounting plate 20 is fixedly mounted at the upper end of the outer wall of the explosion-proof tank 2, a negative pressure fan 7 is fixedly mounted on the upper surface of the mounting plate 20, a tail gas outlet 25 is formed in the upper end of the inner wall of the explosion-proof tank 2, the tail gas outlet 25 is communicated with a gas inlet of the negative pressure fan 7, and a gas outlet of the negative pressure fan 7 is communicated with the tail gas incineration tower 3 through a U-shaped liquid seal pipe 12;
specifically, the pressure relief mechanism comprises a pressure relief pipe 30 and a pressure sensor 29, a pressure relief opening 32 is formed in the top of the explosion-proof tank 2, a pressure relief electromagnetic valve 31 is arranged on the outer walls of the pressure relief pipe 30 and the pressure relief pipe 30, and the pressure sensor 29 is fixedly installed on the top of the interior of the explosion-proof tank 2;
specifically, tail gas equipartition mechanism includes tail gas inlet branch 18, tail gas inlet branch 18 fixed mounting be in explosion-proof tank 2's inside, tail gas inlet branch 18 one end with tail gas intake pipe 4 is linked together, tail gas inlet branch 18's the other end is sealed setting, tail gas inlet branch 18's outer wall top fixed mounting has rotatory nozzle 19, tail gas inlet branch 18's outer wall side fixed mounting has aeration head 24.
The structure principle is as follows: the tail gas entering the anti-explosion tank 2 is rapidly and uniformly dispersed through the tail gas uniform distribution mechanism, meanwhile, a large amount of air is blown into the anti-explosion tank 2 through the air blower 6, the density of the tail gas is rapidly reduced to a safe range, the protection efficiency is improved, moreover, the U-shaped liquid seal pipe 12 is arranged between the anti-explosion tank 2 and the tail gas incineration tower 3, the occurrence of backfire drop is further reduced, when the pressure in the anti-explosion tank 2 is rapidly increased, the temperature in the anti-explosion tank 2 cannot be reduced in a mode of reducing the blowing speed of the air blower 6 and the tail gas absorption speed of the negative pressure fan 7, and the pressure value sensed by the pressure sensor 29 in the anti-explosion tank 2 is higher than a set anti-explosion limit value, the PLC 28 controls the electromagnetic valve 31 to be opened, the pressure relief of the gas in the anti-explosion tank 2 is rapidly released, and the safe production is ensured;
through atomizer 27, level sensor 22, third solenoid valve 16, solution recovery pump 11 cooperation PLC controller 28, with remaining methyl alcohol gas in the tail gas, the filtration of formaldehyde gas is stayed in the water seal liquid, and rotatory nozzle 19 is under the drive of atmospheric pressure, can drive the water seal liquid and rotate, increase water seal liquid and explosion-proof tank 2 in formaldehyde gas, methyl alcohol gas's area of contact, when the height of water seal liquid level is higher than level sensor 22's high value, open third solenoid valve 16 and solution recovery pump 11 in proper order through PLC controller 28 and dissolve the formaldehyde in explosion-proof tank 2, the aqueous solution of methyl alcohol is taken away, when the height of water seal liquid level is less than level sensor 22's low value, close third solenoid valve 16 and solution recovery pump 11 in proper order through PLC controller 28, reduce the production material loss.
The input end of the PLC 28 is electrically connected with the differential pressure sensor 5 and the pressure sensor 29, the output end of the PLC 28 is electrically connected with the electric control end of the first electromagnetic valve 15, the electric control end of the blower 6, the electric control end of the pressure relief electromagnetic valve 31 and the electric control end of the negative pressure fan 7, when the pressure value sensed by the differential pressure sensor 5 is low, water sealing liquid in the explosion-proof tank 2 is prevented from entering the tail gas inlet pipe 4, the blower 6 is controlled by the PLC 28 to reduce the blowing rate, the pressure in the explosion-proof tank 2 is reduced, meanwhile, the negative pressure fan 7 is controlled by the PLC 28 to accelerate the tail gas suction speed, the difference value between the pressure in the explosion-proof tank 2 and the pressure in the tail gas inlet pipe 4 is further reduced to a normal range, manual work is not needed in the whole process, the protection efficiency is improved, and the safe production is ensured;
the upper end of the outer wall of the explosion-proof tank 2 is fixedly provided with a water inlet pipe 8, the outer wall of the water inlet pipe 8 is fixedly provided with a second electromagnetic valve 9, the upper end of the inner wall of the explosion-proof tank 2 is fixedly provided with a water inlet branch pipe 17, the outer wall of the water inlet branch pipe 17 is fixedly provided with an atomizing nozzle 27, the included angle between the atomizing nozzle 27 and the vertical direction is 15-30 degrees, and the sprayed water mist can further purify and filter formaldehyde gas and methanol gas which are not dissolved in the bottom water-seal solution in the tail gas, and then fall into the bottom of the explosion-proof tank 2;
the bottom of the explosion-proof tank 2 is provided with a solution outlet 26, the outer side of the solution outlet 26 is communicated with a solution recovery pipe 10, the outer wall of the solution recovery pipe 10 is fixedly provided with a third electromagnetic valve 16, the other end of the solution recovery pipe 10 is communicated with a water inlet of a solution recovery pump 11, and after the formaldehyde gas and the methanol gas remained in the tail gas enter a one-step filtration process through a water seal liquid, the aqueous solution dissolved with formaldehyde and methanol is sent to a raw material reaction tank through the solution recovery pump 11 for continuous use, so that the loss of production materials is reduced;
the inner wall of the explosion-proof tank 2 is fixedly provided with a liquid level sensor 22, the input end of the PLC 28 is electrically connected with the liquid level sensor 22, the output end of the PLC 28 is electrically connected with the electric control end of the second electromagnetic valve 9, the third electromagnetic valve 16 and the electric control end of the solution recovery pump 11, when the height of the water seal liquid level is higher than the high value of the liquid level sensor 22, the PLC 28 opens the third electromagnetic valve 16 and the solution recovery pump 11 in sequence to pump away the aqueous solution dissolved with formaldehyde and methanol in the explosion-proof tank 2, and when the height of the water seal liquid level is lower than the low value of the liquid level sensor 22, the PLC 28 closes the third electromagnetic valve 16 and the solution recovery pump 11 in sequence;
the outer wall of the tail gas inlet branch pipe 18 is fixedly connected with a connecting pipe 23, the outer wall of the connecting pipe 23 is provided with external threads, the rotary spray head 19 is fixedly connected with the connecting pipe 23 through threads, and the rotary spray head 19 is installed on the tail gas inlet branch pipe 18 in a threaded installation mode, so that when the rotary spray head 19 is damaged, the rotary spray head can be replaced singly, the whole tail gas uniform distribution mechanism does not need to be replaced, and the later maintenance cost is reduced;
wherein, the tail gas inlet branch pipe 18 provided with the rotary nozzle 19 and the aeration head 24 is provided with at least three groups, so that tail gas entering the explosion-proof tank 2 can be quickly and effectively dispersed in the explosion-proof tank 2 uniformly, the bottom inside the explosion-proof tank 2 is provided with water sealing liquid, the distance between the top of the rotary nozzle 19 and the water sealing liquid level is not less than 30cm, so that the tail gas can be in full contact with water, the tail gas which is not filtered by water is prevented from directly entering the tail gas burning tower 3 to cause waste, the outer side of the air inlet of the air blower 6 is fixedly provided with a filter screen 14 which effectively filters dust and other impurities in the outside air to prevent the tail gas from entering the explosion-proof tank 2 to cause pollution, the outer wall of the explosion-proof tank 2 is fixedly provided with a control box 13, the PLC controller 28 is fixedly arranged inside the control box 13 to install the PLC controller 28 in the control box 13, effectively avoid PLC controller 28 to receive the influence of external dust, for PLC controller 28 provides good operational environment, guarantee its stable performance.
The parts not involved in the present invention are the same as or can be implemented by the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an explosion-proof equipment is used in formaldehyde production which characterized in that includes:
the tail gas burning device comprises an absorption tower (1), an explosion-proof tank (2), a tail gas burning tower (3) and a PLC (programmable logic controller) (28), wherein the output end of the PLC (28) is electrically connected with an electric control end of a tail gas inlet mechanism, an electric control end of a tail gas diluting mechanism, an electric control end of a tail gas conveying mechanism and an electric control end of a pressure relief mechanism;
the tail gas inlet mechanism comprises a tail gas inlet pipe (4), a tail gas uniform distribution mechanism is arranged at the bottom inside the explosion-proof tank (2), the top of the absorption tower (1) is communicated with the tail gas uniform distribution mechanism through the tail gas inlet pipe (4), a first electromagnetic valve (15) is fixedly installed on the outer wall of the tail gas inlet pipe (4), and differential pressure sensors (5) are fixedly installed on the outer walls of the tail gas inlet pipes (4) on two sides of the first electromagnetic valve (15);
the tail gas diluting mechanism comprises a supporting plate (21), the supporting plate (21) is fixedly installed on the outer wall of the explosion-proof tank (2), an air blower (6) is fixedly installed at the upper end of the supporting plate (21), and an air outlet of the air blower (6) is communicated with the interior of the explosion-proof tank (2);
the tail gas conveying mechanism comprises a mounting plate (20), the mounting plate (20) is fixedly mounted at the upper end of the outer wall of the explosion-proof tank (2), a negative pressure fan (7) is fixedly mounted on the upper surface of the mounting plate (20), a tail gas outlet (25) is formed in the upper end of the inner wall of the explosion-proof tank (2), the tail gas outlet (25) is communicated with a gas inlet of the negative pressure fan (7), and a gas outlet of the negative pressure fan (7) is communicated with the tail gas incineration tower (3) through a U-shaped liquid seal pipe (12);
the pressure relief mechanism comprises a pressure relief pipe (30) and a pressure sensor (29), a pressure relief opening (32) is formed in the top of the explosion-proof tank (2), pressure relief electromagnetic valves (31) are arranged on the outer walls of the pressure relief pipe (30) and the pressure relief pipe (30), and the pressure sensor (29) is fixedly installed on the top of the interior of the explosion-proof tank (2);
the tail gas uniform distribution mechanism comprises a tail gas inlet branch pipe (18), the tail gas inlet branch pipe (18) is fixedly installed inside the explosion-proof tank (2), one end of the tail gas inlet branch pipe (18) is communicated with the tail gas inlet pipe (4), the other end of the tail gas inlet branch pipe (18) is in a sealing arrangement, a rotary spray head (19) is fixedly installed at the top of the outer wall of the tail gas inlet branch pipe (18), and an aeration head (24) is fixedly installed on the side face of the outer wall of the tail gas inlet branch pipe (18).
2. The explosion-proof equipment for formaldehyde production according to claim 1, characterized in that: the input of PLC controller (28) with differential pressure sensor (5), pressure sensor (29) electric connection, the output of PLC controller (28) with the automatically controlled end of first solenoid valve (15), the automatically controlled end of air-blower (6), the automatically controlled end of pressure release solenoid valve (31), the automatically controlled end electric connection of negative-pressure air fan (7).
3. The explosion-proof device for formaldehyde production according to claim 1, characterized in that: the explosion-proof tank is characterized in that a water inlet pipe (8) is fixedly mounted at the upper end of the outer wall of the explosion-proof tank (2), a second electromagnetic valve (9) is fixedly arranged on the outer wall of the water inlet pipe (8), a water inlet branch pipe (17) is fixedly mounted at the upper end of the inner wall of the explosion-proof tank (2), an atomizing nozzle (27) is fixedly mounted on the outer wall of the water inlet branch pipe (17), and the included angle between the atomizing nozzle (27) and the vertical direction is 15-30 degrees.
4. The explosion-proof device for formaldehyde production according to claim 3, characterized in that: a solution water outlet (26) is formed in the bottom of the explosion-proof tank (2), the outer side of the solution water outlet (26) is communicated with a solution recovery pipe (10), a third electromagnetic valve (16) is fixedly mounted on the outer wall of the solution recovery pipe (10), and the other end of the solution recovery pipe (10) is communicated with a water inlet of a solution recovery pump (11).
5. The explosion-proof equipment is used in formaldehyde production according to claim 4, characterized in that: the inner wall fixed mounting of explosion-proof tank (2) has level sensor (22), the input of PLC controller (28) with level sensor (22) electric connection, the output of PLC controller (28) with the automatically controlled end of second solenoid valve (9) third solenoid valve (16) the automatically controlled end electric connection of solution recovery pump (11).
6. The explosion-proof equipment for formaldehyde production according to claim 1, characterized in that: the outer wall fixedly connected with connecting pipe (23) of tail gas inlet branch pipe (18), the external screw thread has been seted up to the outer wall of connecting pipe (23), rotatory nozzle (19) through the screw thread with connecting pipe (23) fixed connection.
7. The explosion-proof equipment is used in formaldehyde production according to claim 6, characterized in that: and at least three groups of tail gas inlet branch pipes (18) provided with the rotary spray heads (19) and the aeration heads (24) are arranged.
8. The explosion-proof equipment is used in formaldehyde production according to claim 7, characterized in that: and the bottom inside the explosion-proof tank (2) is provided with water seal liquid, and the distance from the top of the rotary spray head (19) to the water seal liquid level is not less than 30 cm.
9. The explosion-proof device for formaldehyde production according to claim 1, characterized in that: and a filter screen (14) is fixedly arranged on the outer side of the air inlet of the air blower (6).
10. The explosion-proof device for formaldehyde production according to claim 1, characterized in that: the outer wall of the explosion-proof tank (2) is fixedly provided with a control box (13), and the PLC (28) is fixedly arranged in the control box (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011523419.7A CN114642950B (en) | 2020-12-21 | 2020-12-21 | Explosion-proof equipment is used in formaldehyde production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011523419.7A CN114642950B (en) | 2020-12-21 | 2020-12-21 | Explosion-proof equipment is used in formaldehyde production |
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| CN114642950B CN114642950B (en) | 2024-03-26 |
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| CN202011523419.7A Active CN114642950B (en) | 2020-12-21 | 2020-12-21 | Explosion-proof equipment is used in formaldehyde production |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1487093A (en) * | 1966-07-20 | 1967-06-30 | Du Pont | Preparation of concentrated formaldehyde solutions |
| CN102504868A (en) * | 2011-10-31 | 2012-06-20 | 河北凯跃化工集团有限公司 | Silver method formaldehyde tail gas and atmospheric pressure gas producer co-production method |
| CN107314382A (en) * | 2017-07-12 | 2017-11-03 | 安徽弘源化工科技有限公司 | A kind of flame retardant type formaldehyde exhaust gas processing device |
| CN107899402A (en) * | 2017-11-28 | 2018-04-13 | 滨化集团股份有限公司 | Propylene oxide by chlorohydrination device exhaust processing method |
| CN207755955U (en) * | 2018-05-08 | 2018-08-24 | 北京泰克阳光环保科技有限公司 | Exhaust-gas treatment aerating system |
| CN210544347U (en) * | 2019-09-09 | 2020-05-19 | 大连佳纯气体净化技术开发有限公司 | High-efficient waste gas treatment is with washing jar |
| CN111692598A (en) * | 2020-06-09 | 2020-09-22 | 扬州康业环境工程技术有限公司 | Waste incinerator convenient for filtering waste gas |
| CN211987887U (en) * | 2020-02-24 | 2020-11-24 | 青州市鲁光润滑油有限公司 | Tail gas recovery explosion-proof equipment |
-
2020
- 2020-12-21 CN CN202011523419.7A patent/CN114642950B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1487093A (en) * | 1966-07-20 | 1967-06-30 | Du Pont | Preparation of concentrated formaldehyde solutions |
| CN102504868A (en) * | 2011-10-31 | 2012-06-20 | 河北凯跃化工集团有限公司 | Silver method formaldehyde tail gas and atmospheric pressure gas producer co-production method |
| CN107314382A (en) * | 2017-07-12 | 2017-11-03 | 安徽弘源化工科技有限公司 | A kind of flame retardant type formaldehyde exhaust gas processing device |
| CN107899402A (en) * | 2017-11-28 | 2018-04-13 | 滨化集团股份有限公司 | Propylene oxide by chlorohydrination device exhaust processing method |
| CN207755955U (en) * | 2018-05-08 | 2018-08-24 | 北京泰克阳光环保科技有限公司 | Exhaust-gas treatment aerating system |
| CN210544347U (en) * | 2019-09-09 | 2020-05-19 | 大连佳纯气体净化技术开发有限公司 | High-efficient waste gas treatment is with washing jar |
| CN211987887U (en) * | 2020-02-24 | 2020-11-24 | 青州市鲁光润滑油有限公司 | Tail gas recovery explosion-proof equipment |
| CN111692598A (en) * | 2020-06-09 | 2020-09-22 | 扬州康业环境工程技术有限公司 | Waste incinerator convenient for filtering waste gas |
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| CN114642950B (en) | 2024-03-26 |
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