CN117446948A - Coal glycol nitric acid reduction purifying equipment - Google Patents
Coal glycol nitric acid reduction purifying equipment Download PDFInfo
- Publication number
- CN117446948A CN117446948A CN202311461302.4A CN202311461302A CN117446948A CN 117446948 A CN117446948 A CN 117446948A CN 202311461302 A CN202311461302 A CN 202311461302A CN 117446948 A CN117446948 A CN 117446948A
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- China
- Prior art keywords
- sealing
- nitric acid
- tank body
- fixedly arranged
- air
- Prior art date
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- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 title claims abstract description 56
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 229910017604 nitric acid Inorganic materials 0.000 title claims abstract description 51
- 230000009467 reduction Effects 0.000 title claims abstract description 31
- 239000003245 coal Substances 0.000 title claims abstract description 24
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 81
- 238000009434 installation Methods 0.000 claims abstract description 42
- 238000000746 purification Methods 0.000 claims abstract description 24
- 238000000605 extraction Methods 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 48
- 239000007788 liquid Substances 0.000 claims description 46
- 238000003756 stirring Methods 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- HTKIMWYSDZQQBP-UHFFFAOYSA-N 2-hydroxyethyl nitrate Chemical compound OCCO[N+]([O-])=O HTKIMWYSDZQQBP-UHFFFAOYSA-N 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 51
- 238000006722 reduction reaction Methods 0.000 abstract description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 8
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 23
- 239000000376 reactant Substances 0.000 description 17
- 239000002699 waste material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 239000007800 oxidant agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000007086 side reaction Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
Abstract
The invention discloses a coal glycol nitric acid reduction purification device, which relates to the technical field of nitric acid reduction purification and comprises a tank body, wherein a main shaft, a motor, a mounting shaft, a transmission control assembly and a pressure balance assembly are arranged in the tank body; the pressure balance assembly comprises a plurality of air extraction cylinders which are radially arranged on the outer wall of the installation shaft, a first piston is arranged in the air extraction cylinders in a sealing sliding mode, and a connecting rod is fixedly arranged at one end, far away from the installation shaft, of the first piston. The invention improves the conversion rate of the reaction by controlling the reaction pressure, changes the balance position of the reaction, and promotes the reduction reaction to deviate towards the generation direction of nitrous acid and nitrogen, thereby improving the reduction efficiency.
Description
Technical Field
The invention relates to the technical field of nitric acid reduction and purification, in particular to a coal glycol nitric acid reduction and purification device.
Background
Ethylene Glycol (EG) is one of the important raw materials in the organic chemistry industry, is mainly used for producing polyester resins and antifreeze, and has small application in the fields of unsaturated polyester resins, lubricants, plasticizers, nonionic surfactants and the like. At present, the world ethylene glycol production method mainly comprises two major types of petroleum routes and non-petroleum routes, and according to the resource conditions of 'lean oil, rich coal and less gas' in China, the coal-based ethylene glycol technology of the non-petroleum routes is a research and development direction in the future.
The process for preparing the ethylene glycol from the coal mainly comprises the following steps: in the regeneration reaction process, the regenerated liquid phase waste liquid contains a large amount of nitric acid, which has certain harm to the environment and the health of human bodies, and the nitric acid is reduced into nitrous acid and nitrogen gas by adding a reducing agent for the waste water generated after regeneration.
The reduction reaction of nitric acid is generally carried out in a reaction kettle, the existing reduction equipment is usually connected with an exhaust gas collecting pipe, nitrogen generated by reduction is directly pumped away, the whole equipment is carried out under normal pressure, when the gas phase pressures of reactants and products are equal according to the Le Chatelier principle, the reaction reaches equilibrium, the pressure of the reactants and the products in the gas phase is relatively low under the normal pressure, the reaction equilibrium position may be biased to one side with more reactants, the conversion rate is low, the energy of reactant molecules is low under the normal pressure, side reactions or product decomposition are easy to generate when the reaction occurs, the selectivity of the products is low, and the high-purity products are difficult to obtain.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the nitric acid reduction reaction is carried out under normal pressure, the reaction equilibrium position is possibly biased to one side with more reactants, the conversion rate is low, the selectivity of a product is low, and the high-purity product is difficult to obtain.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the coal glycol nitric acid reduction purification device comprises a tank body, wherein the tank body is internally provided with:
the main shaft is coaxially and rotatably arranged in the tank body, and a plurality of stirring rods are equidistantly arranged on the peripheral surface of the main shaft;
the motor is fixedly arranged at the bottom of the tank body, and the output end of the motor is in transmission connection with the main shaft through a speed reducer;
the installation shaft is rotationally arranged at the top of the tank body and is coaxially and rotationally connected with the main shaft;
the transmission control assembly comprises a plurality of air pressure cylinders fixedly arranged on the outer wall of the main shaft, sealing sheets are arranged in the air pressure cylinders in a sealing sliding manner, a resistance structure for balancing air pressure is arranged between the sealing sheets and the air pressure cylinders, an inserting rod is fixedly arranged at one end, close to the mounting shaft, of each sealing sheet, and an inserting hole matched with the inserting rod is formed in the outer wall of the mounting shaft;
the pressure balance assembly comprises a plurality of air extraction cylinders radially arranged on the outer wall of the installation shaft, a piston I is arranged in the air extraction cylinders in a sealing sliding manner, a connecting rod is fixedly arranged at one end, far away from the installation shaft, of the piston I, a driving mechanism for driving the connecting rod to axially move is arranged in the tank body, an air inlet end and an air outlet end of the air extraction cylinders are arranged at one end, close to the installation shaft, of the air extraction cylinders, one-way valves I are arranged at the air inlet end and the air outlet end of the air extraction cylinders, and driving gas flows unidirectionally when the piston I reciprocates.
Preferably, the resistance structure comprises a resistance spring, one end of the resistance spring is fixedly connected with the inner bottom of the air pressure cylinder, and the other end of the resistance spring is fixedly connected with the sealing piece.
Preferably, the resistance structure comprises a first magnet fixedly arranged at the inner bottom of the air pressure cylinder, an adjusting rod is connected to the sealing piece through threads, a second magnet is fixedly arranged at the end part of the adjusting rod, and the first magnet and the second magnet are correspondingly arranged and have the same magnetic poles at one end opposite to each other.
Preferably, the driving mechanism comprises a guide plate fixedly arranged on the inner wall of the tank body, a guide groove is formed in the guide plate, a first guide rod is fixedly arranged at the end part of the connecting rod, and the first guide rod extends into the guide groove and abuts against the inner wall of the guide groove.
Preferably, the guide groove is an annular groove with a wavy outline.
Preferably, the top of the mounting shaft is provided with a sealing connecting ring, a first sealing cavity and a second sealing cavity which are coaxially arranged are formed in the sealing connecting ring, a sealing disc is arranged at the top of the sealing connecting ring in a sealing and rotating mode, a gas collecting tube is fixedly arranged at the top of the sealing disc, and the output ends of the gas collecting tube and the air suction tube are communicated with the sealing cavities.
Preferably, the liquid suction device further comprises a liquid suction pipe fixedly arranged on the outer wall of the installation shaft, a piston II is arranged in the liquid suction pipe in a sealing sliding manner, a push rod is fixedly arranged on the side wall of the piston II, a guide rod II is fixedly arranged at the end part of the push rod, and the guide rod II extends into the guide groove and abuts against the inner wall of the guide groove.
Preferably, the output end and the input end of the liquid suction pipe are both provided with a second check valve, the top of the tank body is provided with a storage tank for storing the reducing agent, and the output end of the storage tank and the input end of the liquid suction pipe are both communicated with the sealing cavity.
Preferably, the main shaft is provided with a flow channel extending into the mounting shaft, the output end of the liquid suction pipe is communicated with the flow channel, and the stirring rod is provided with a plurality of liquid discharge holes communicated with the flow channel.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the nitric acid reduction reaction is carried out in a sealed tank body, the pressure in the tank body is increased by arranging the air pressure cylinder, the sealing sheet and the resistance spring to be matched, nitrogen generated by the nitric acid reduction reaction is utilized to push the sealing sheet to move after the air pressure is increased, the inserted rod is inserted into the insertion hole, the installation shaft and the main shaft are driven, the pressure balance component is controlled to operate and release the pressure, the tank body is kept in a reasonable pressure reaction environment, after the reaction pressure is improved, the collision frequency of reactants is increased, so that the reaction is promoted, the reaction equilibrium position can be changed by increasing the pressure, the reduction reaction is promoted to deviate towards the generation direction of nitrous acid and nitrogen, so that the reduction efficiency is improved, nitric acid is not a strong oxidant, the high explosiveness is realized, the volatility of nitric acid can be reduced by increasing the pressure in the reduction purification process of nitric acid, the release of the oxidant is reduced, and the safety of equipment is improved;
2. according to the invention, the liquid suction pipe is arranged to supplement the reducing agent, after the internal pressure of the tank body is increased, the reducing agent is reacted, and nitric acid is unreacted, at the moment, the mounting shaft and the main shaft are driven to drive the piston to move so as to suck the reducing agent in the storage tank into the tank body for reaction, so that the reducing agent is added in batches, the reaction can be better controlled, the reaction out-of-control caused by the fact that excessive reducing agent is added at one time is avoided, the reaction rate and the reaction temperature can be better controlled, the selectivity and the yield of the reaction are improved, the excessive reducing agent is usually required to be added, the nitric acid is ensured to be completely reduced, the mounting shaft is driven to rotate by the air pressure generated by the reaction, the addition of the reducing agent is further controlled, nitrogen is not generated after the nitric acid in the waste liquid is reacted, and the internal air pressure of the tank body is not changed any more, so that the excessive addition of the reducing agent is not generated, and the consumption of the reducing agent is favorable to be accurately controlled;
3. according to the invention, the stirring rod with the liquid discharge holes is arranged, the reducing agent is directly added into different depth positions in the waste liquid through the liquid discharge holes, the reducing agent and the reactant are fully mixed under the stirring action of the stirring rod, so that the uniformity and the effect of the reaction are improved, meanwhile, in the reduction reaction of nitric acid, the heat is released by the reaction, the temperature of the reaction system is increased, the temperature of the reaction system can be more uniformly distributed by stirring, the heat can be uniformly dispersed, the generation of a local area with overhigh temperature is avoided, the occurrence of side reaction is reduced, the aggregation and accumulation of the precipitate in the reaction system can be prevented, and the uniform dispersion of the reactant and the reducing agent is maintained.
Drawings
FIG. 1 is a schematic diagram of the appearance structure of the coal glycol nitric acid reduction purification device;
FIG. 2 is a schematic diagram of a cross-sectional structure of a coal glycol nitric acid reduction purification device according to the present invention;
FIG. 3 is a schematic diagram of the internal structure of the coal glycol nitric acid reduction purification device;
FIG. 4 is a schematic diagram of the structure of the main shaft in the coal glycol nitric acid reduction purification device;
FIG. 5 is a schematic diagram of a central cross-sectional structure of the coal glycol nitric acid reduction purification device;
FIG. 6 is an enlarged view of portion A of FIG. 5;
FIG. 7 is a schematic diagram of the pressure balance assembly in the coal glycol nitric acid reduction purification device according to the present invention;
FIG. 8 is a schematic diagram showing a top view structure of a pressure balance assembly in the coal-to-ethylene glycol nitrate reduction purification device according to the present invention;
fig. 9 is a schematic structural view of embodiment 2 of the present invention.
In the figure: 1. a tank body; 11. a storage tank; 2. a main shaft; 21. a stirring rod; 22. a flow passage; 23. a liquid discharge hole; 3. a mounting shaft; 31. a jack; 32. a liquid suction pipe; 33. a second piston; 34. a push rod; 35. a second guide rod; 4. a transmission control assembly; 41. an air pressure cylinder; 42. a sealing sheet; 43. a rod; 44. a resistance spring; 45. a first magnet; 46. an adjusting rod; 47. a second magnet; 5. a pressure balancing assembly; 51. a suction cylinder; 52. a first piston; 53. a connecting rod; 54. a guide plate; 55. a guide groove; 56. a first guide rod; 6. a motor; 7. a connecting ring; 71. sealing the first cavity; 72. sealing the second cavity; 73. a sealing plate; 74. and a gas collecting tube.
Detailed Description
Example 1
Referring to fig. 1-3, the coal glycol nitric acid reduction purification device comprises a tank body 1, wherein a main shaft 2, a motor 6, a mounting shaft 3, a transmission control assembly 4 and a pressure balance assembly 5 are arranged in the tank body 1, the tank body 1 is a sealed tank body, a feed pipe and a discharge pipe are arranged on the tank body 1, waste liquid containing nitric acid is conveyed into the tank body 1 through the feed pipe and then is closed, nitrogen is generated after reduction reaction of the nitric acid and a reducing agent, the internal pressure of the tank body 1 can be increased, the internal pressure of the tank body 1 can be controlled to be kept at a higher level through the pressure balance assembly 5, after the reaction pressure is increased, the collision frequency of reactants is increased, so that the reaction is promoted, the reaction equilibrium position can be changed, the reduction reaction is promoted to deviate towards the generation direction of nitrous acid and the nitrogen, so that the reduction efficiency is improved, the nitric acid is not a strong oxidizing agent, the nitric acid is high in explosiveness, the pressure is increased, the pressure can be reduced in the reduction purification process of the nitric acid, the volatility of the nitric acid can be reduced, the release of the oxidizing agent is reduced, and the safety of the device is improved.
The main shaft 2 coaxially rotates to be arranged in the tank body 1, a plurality of stirring rods 21 are arranged on the peripheral surface of the main shaft 2 at equal intervals, the stirring rods 21 are driven to stir materials in the tank body 1 through the rotation of the main shaft 2, reactants and reducing agents can be more uniformly mixed together through stirring, the contact area between the reactants and the reducing agents is increased, the reaction rate is accelerated, the reaction is promoted, simultaneously in the nitric acid reduction reaction, the reaction releases heat, the temperature of the reaction system is increased, the stirring can enable the temperature of the reaction system to be more uniformly distributed, the heat can be uniformly dispersed through stirring, the generation of a region with overhigh local temperature is avoided, the occurrence of side reactions is reduced, the aggregation and accumulation of the precipitates in the reaction system can be prevented, and the uniform dispersion of the reactants and the reducing agents is maintained.
The motor 6 is fixedly arranged at the bottom of the tank body 1, the output end of the motor 6 is in transmission connection with the main shaft 2 through a speed reducer, power is provided through the motor 6, the rotation speed of the output of the motor 6 is reduced through the cooperation of the speed reducer, and the condition of stirring needs to be adjusted according to a specific reaction system and requirements when the nitric acid reduction reaction is carried out, so that too strong stirring can possibly cause gas to escape or generate excessive foam, and the reaction is influenced. Therefore, the main shaft 2 is controlled by the speed reducer to keep reasonable rotation speed so as to ensure the effect and safety of the reaction.
The installation axle 3 rotates and sets up in jar body 1 top, installation axle 3 and the coaxial rotation of main shaft 2 are connected, pass through transmission control subassembly 4 control transmission purpose between installation axle 3 and the main shaft 2, when jar internal gas pressure of 1 does not reach the pressure of demarcating, installation axle 3 does not carry out the transmission with main shaft 2, when jar internal pressure of 1 exceeds the pressure of demarcating, carry out effective transmission between main shaft 2 and the installation axle 3, drive installation axle 3 rotates, when installation axle 3 rotates, drive pressure balance subassembly 5 operation release pressure makes jar internal maintenance in a reasonable pressure reaction environment.
Referring to fig. 4-6, the transmission control assembly 4 includes a plurality of air pressure cylinders 41 fixedly disposed on the outer wall of the spindle 2, sealing plates 42 are slidably disposed in the air pressure cylinders 41 in a sealing manner, a resistance structure for balancing air pressure is disposed between the sealing plates 42 and the air pressure cylinders 41, a sealing cavity formed between the air pressure cylinders 41 and the sealing plates 42 is normal pressure, after nitric acid is reacted in the tank 1 to generate nitrogen gas so that the air pressure in the inner wall of the tank 1 is increased, air pressure difference is formed between the inside and outside of the air pressure cylinders 41, the air pressure in the tank 1 can apply thrust to the sealing plates 42, the resistance structure acts on the sealing plates 42 and the thrust caused by the sealing plates 42 under the calibrated pressure are equal, after the air pressure in the tank 1 exceeds the calibrated air pressure, the sealing plates 42 are pushed to move, an inserted rod 43 is fixedly disposed at one end of the sealing plates 42 close to the mounting shaft 3, an insertion hole 31 matched with the inserted rod 43 is formed in the outer wall of the mounting shaft 3, and the inserted rod 43 is pushed forward when the sealing plates 42 move, so that the inserted rod 43 is inserted into the insertion hole 31, and the spindle 2 is limited circumferentially, therefore, the spindle 2 can effectively transmit the driving force to the mounting shaft 3.
Referring to fig. 6, the resistance structure includes a resistance spring 44, one end of the resistance spring 44 is fixedly connected with the inner bottom of the air cylinder 41, the other end of the resistance spring 44 is fixedly connected with the sealing piece 42, the sealing piece 42 is blocked by the elastic force of the resistance spring 44, only when the thrust force generated by the air pressure difference is greater than the elastic force of the resistance spring 44, the driving insert rod 43 is inserted into the insertion hole 31, and after the air pressure is reduced, the resistance spring 44 drives the sealing piece 42 to rebound, so that the insert rod 43 is separated from the insertion hole 31, and the transmission of the installation shaft 3 and the main shaft 2 is disabled.
Referring to fig. 7-8, the pressure balance assembly 5 includes a plurality of air extraction cylinders 51 radially arranged on the outer wall of the installation shaft 3, a first piston 52 is arranged in the air extraction cylinders 51 in a sealing sliding manner, first check valves are arranged at the air inlet end and the air outlet end of the air extraction cylinders 51, when the first piston 52 reciprocates, driving air flows unidirectionally, the air inlet end and the air outlet end of the air extraction cylinders 51 are arranged at one end close to the installation shaft 3, the installation directions of the first check valves are opposite, when the first piston 52 reciprocates in the air extraction cylinders 51, the air extraction cylinders 51 suck air in the tank body 1 from the air inlet end and then discharge the air from the air outlet end, a connecting rod 53 is fixedly arranged at one end, away from the installation shaft 3, of the first piston 52 and used for controlling the movement of the first piston 52, a driving mechanism used for driving the connecting rod 53 to axially move is arranged in the tank body 1, and when the installation shaft 3 and the main shaft 2 are effectively transmitted, and under the action of the driving mechanism, the connecting rod 53 drives the first piston 52 to reciprocate in the air extraction cylinders 51.
Referring to fig. 3 and 8, the driving mechanism includes a guide plate 54 fixedly disposed on an inner wall of the tank body 1, when the air suction cylinder 51 and the connecting rod 53 rotate along with the mounting shaft 3, the air suction cylinder and the connecting rod 53 move relatively to the guide plate 54, a guide groove 55 is formed in the guide plate 54, the guide groove 55 is an annular groove with a wavy outline, a guide rod one 56 is fixedly disposed at an end of the connecting rod 53, the guide rod one 56 extends into the guide groove 55 and abuts against an inner wall of the guide groove 55, the guide rod one 56 rotates along with the connecting rod 53, and moves along the outline of the guide groove 55 under the limiting effect of the guide groove 55, so that the connecting rod 53 reciprocates in a radial direction of the mounting shaft 3, and the piston one 52 is driven to reciprocate in the air suction cylinder 51 to perform air suction.
Referring to fig. 5 and 7, the top of the installation shaft 3 is provided with a sealing connection ring 7, a first sealing cavity 71 and a second sealing cavity 72 which are coaxially arranged are arranged in the sealing connection ring 7, a sealing disc 73 is arranged at the top of the sealing connection ring 7 in a sealing rotation mode, a gas collecting tube 74 is fixedly arranged at the top of the sealing disc 73, the gas collecting tube 74 and the output end of the air suction tube 51 are all communicated with the first sealing cavity 71, when the air suction tube 51 is used for exhausting air, gas is conveyed into the first sealing cavity 71, the gas is collected in the first sealing cavity 71 and exhausted through the gas collecting tube 74, and because the gas collecting tube 74 needs to be externally connected with a gas collecting device, the gas collecting tube 74 is communicated with the first sealing cavity 71 through being connected with the sealing disc 73, the position of the gas collecting tube 74 cannot be influenced when the installation shaft 3 rotates, and the gas collecting tube 74 is prevented from winding and twisting.
Referring to fig. 3, 7 and 8, the liquid suction device further comprises a liquid suction pipe 32 fixedly arranged on the outer wall of the installation shaft 3, the output end and the input end of the liquid suction pipe 32 are respectively provided with a second check valve, the two check valves are arranged in opposite directions, a second piston 33 is arranged in the liquid suction pipe 32 in a sealing sliding manner, under the action of the second check valves, when the second piston 33 reciprocates along the liquid suction pipe 32, driving liquid flows unidirectionally, a push rod 34 is fixedly arranged on the side wall of the second piston 33, a guide rod second 35 is fixedly arranged at the end part of the push rod 34, the guide rod second 35 extends into the guide groove 55 and abuts against the inner wall of the guide groove 55, when the liquid suction pipe 32 rotates along with the installation shaft 3, the position of the guide rod second 35 in the guide groove 55 is continuously changed, the guide rod second 35 moves along the outline of the guide groove 55, and the second piston 33 is driven to reciprocate in the liquid suction pipe 32 to suck liquid.
Referring to fig. 1-3, a storage tank 11 for storing a reducing agent is arranged at the top of the tank body 1, the output end of the storage tank 11 and the input end of the liquid suction pipe 32 are both communicated with the second sealing cavity 72, the reducing agent in the storage tank 11 flows into the second sealing cavity 72, when the liquid suction pipe 32 is used for sucking liquid, the reducing agent in the second sealing cavity 72 is sucked into the tank body 1, the output end of the storage tank 11 is communicated with the second sealing cavity 72 through a sealing disc 73, and the influence of the rotation of the installation shaft 3 on the connecting part of the storage tank 11 is avoided.
When the waste liquid is subjected to reduction purification, part of the reducing agent is required to be added through a feeding pipe for starting the reaction, in the subsequent reaction, the pressure in the tank body 1 is increased, so that the installation shaft 3 and the main shaft 2 are driven to drive the liquid suction pipe 32 to suck the reducing agent in the storage tank 11 into the tank body 1, the addition of the reducing agent is realized, the reaction can be better controlled by adding the reducing agent in batches, the condition that the reaction is out of control due to the fact that excessive reducing agent is added at one time is avoided, the reaction rate and the temperature can be better controlled, the selectivity and the yield of the reaction are improved, in order to completely react the nitric acid, the excessive reducing agent is required to be added generally, after the internal pressure of the tank body 1 is increased, the condition that nitric acid is not reacted is represented, in order to ensure that the nitric acid is completely reduced, the main shaft 2 can drive the installation shaft 3 to rotate through the air pressure generated by the reaction, the addition of the reducing agent is controlled, and the small amount of the entering reducing agent can not react again after the nitric acid in the waste liquid is finished, the air pressure in the tank body 1 is not changed any more, therefore, the main shaft 2 and the installation shaft 3 can not be driven again, the excessive addition of the reducing agent can not occur, and the excessive addition of the reducing agent is favorable for accurately judging the consumption of the reducing agent.
Referring to fig. 5, a flow passage 22 extending into the installation shaft 3 is formed on the main shaft 2, the flow passage 22 extends into the main shaft 2 vertically from the installation shaft 3, when the installation shaft 3 and the main shaft 2 rotate relatively, the communication state of the flow passage 22 is not affected, the output end of the liquid suction pipe 32 is communicated with the flow passage 22, a plurality of liquid discharge holes 23 communicated with the flow passage 22 are formed on the stirring rod 21, when the liquid suction pipe 32 pumps and outputs the reducing agent, the reducing agent enters the flow passage 22, and is directly added into different depth positions in the waste liquid through different liquid discharge holes 23, and under the stirring action of the stirring rod 21, the reducing agent and the reactant are fully mixed, so that the uniformity and effect of the reaction are improved.
Example 2
Referring to fig. 9, the resistance structure includes a first magnet 45 fixedly disposed at the inner bottom of the air cylinder 41, an adjusting rod 46 is screwed on the sealing plate 42, a second magnet 47 is fixedly disposed at the end of the adjusting rod 46, the first magnet 45 and the second magnet 47 are correspondingly disposed and have the same magnetic poles at opposite ends, the thrust generated by the air pressure difference between the inner and outer sides of the air cylinder 41 is balanced by the repulsive force between the first magnet 45 and the second magnet 47, the initial distance between the first magnet 45 and the second magnet 47 can be controlled by rotating the adjusting rod 46, the initial size of the repulsive force is adjusted, the initial size of the repulsive force is changed, namely the thrust balance point generated by the air pressure difference can be controlled, and the control of the calibration pressure is realized.
The specific working principle of the invention is as follows:
when the device is used, the waste liquid containing nitric acid is conveyed into the tank body 1 through the feed pipe, a small amount of reducing agent is added into the tank body 1 for starting the reaction, the motor 6 is started, the main shaft 2 is driven by the speed reducer to rotate at a low speed, reactants are stirred, the reactants and the reducing agent are more uniformly mixed together, the contact area between the reactants and the reducing agent is increased, and the device is beneficial to accelerating the reaction rate;
nitrogen is generated after the reduction reaction of the nitric acid and the reducing agent, so that the air pressure in the tank body 1 is increased, when the pressure in the tank body 1 exceeds the calibrated pressure, the air pressure difference formed inside and outside the air pressure cylinder 41 can apply thrust to the sealing piece 42, the sealing piece 42 is pushed to move, the inserting rod 43 is inserted into the inserting hole 31, and the circumferential limit between the mounting shaft 3 and the main shaft 2 is effectively transmitted;
the installation shaft 3 rotates along with the main shaft 2 to drive the air suction cylinder 51 and the liquid suction pipe 32 to rotate, so that the guide rod I56 and the guide rod II 35 move along the outline of the guide groove 55 under the action of the guide groove 55, the piston I52 is driven to reciprocate in the air suction cylinder 51 to perform air suction and exhaust, the air is discharged to an external gas collecting device through the gas collecting pipe 74, the air pressure in the tank 1 is reduced, the piston II 33 is driven to reciprocate in the liquid suction pipe 32 to perform liquid suction, the reducing agent is sucked into the tank 1 to be supplemented, the sealing piece 42 is pushed outwards under the action of the resistance spring 44 until the air pressure is reduced to reach the nominal pressure, the inserting rod 43 is separated from the jack 31, and at the moment, the installation shaft 3 and the main shaft 2 are separated from transmission;
after the last pumping and discharging gas and the addition of the reducing agent are completed, the air pressure does not rise for a long time, so that the operation of the equipment can be stopped after the nitric acid is completely reacted, and the reactants are discharged.
Claims (9)
1. The coal glycol nitric acid reduction purification device comprises a tank body (1), and is characterized in that:
the main shaft (2) is coaxially and rotatably arranged in the tank body (1), and a plurality of stirring rods (21) are equidistantly arranged on the peripheral surface of the main shaft (2);
the motor (6) is fixedly arranged at the bottom of the tank body (1), and the output end of the motor (6) is in transmission connection with the main shaft (2) through a speed reducer;
the installation shaft (3) is rotationally arranged at the top of the tank body (1), and the installation shaft (3) is coaxially and rotationally connected with the main shaft (2);
the transmission control assembly (4) comprises a plurality of air pressure cylinders (41) fixedly arranged on the outer wall of the main shaft (2), sealing sheets (42) are arranged in the air pressure cylinders (41) in a sealing sliding manner, a resistance structure for balancing air pressure is arranged between the sealing sheets (42) and the air pressure cylinders (41), inserting rods (43) are fixedly arranged at one ends, close to the mounting shafts (3), of the sealing sheets (42), and inserting holes (31) matched with the inserting rods (43) are formed in the outer wall of the mounting shafts (3);
the pressure balance assembly (5) comprises a plurality of air extraction cylinders (51) radially arranged on the outer wall of the installation shaft (3), a first piston (52) is arranged in the air extraction cylinders (51) in a sealing sliding mode, a connecting rod (53) is fixedly arranged at one end of the first piston (52) away from the installation shaft (3), a driving mechanism for driving the connecting rod (53) to axially move is arranged in the tank body (1), an air inlet end and an air outlet end of the air extraction cylinders (51) are arranged at one end close to the installation shaft (3), and a first check valve is arranged at the air inlet end and the air outlet end of the air extraction cylinders (51), and driving gas flows unidirectionally when the first piston (52) reciprocates.
2. The coal glycol nitric acid reduction purification device according to claim 1, wherein the resistance structure comprises a resistance spring (44), one end of the resistance spring (44) is fixedly connected with the inner bottom of the air pressure cylinder (41), and the other end of the resistance spring (44) is fixedly connected with the sealing piece (42).
3. The coal glycol nitric acid reduction purification device according to claim 1, wherein the resistance structure comprises a first magnet (45) fixedly arranged at the inner bottom of the air pressure cylinder (41), an adjusting rod (46) is connected to the sealing piece (42) in a threaded mode, a second magnet (47) is fixedly arranged at the end portion of the adjusting rod (46), and the first magnet (45) and the second magnet (47) are correspondingly arranged and have the same magnetic poles at the opposite ends.
4. The coal glycol nitric acid reduction purification device according to claim 1, wherein the driving mechanism comprises a guide plate (54) fixedly arranged on the inner wall of the tank body (1), a guide groove (55) is formed in the guide plate (54), a guide rod I (56) is fixedly arranged at the end part of the connecting rod (53), and the guide rod I (56) extends into the guide groove (55) and abuts against the inner wall of the guide groove (55).
5. The apparatus for reducing and purifying ethylene glycol nitrate from coal as claimed in claim 4, wherein the guide groove (55) is an annular groove having a wavy profile.
6. The coal glycol nitric acid reduction purification device according to claim 1, wherein a sealing connection ring (7) is arranged at the top of the installation shaft (3), a first sealing cavity (71) and a second sealing cavity (72) which are coaxially arranged are arranged in the sealing connection ring (7), a sealing disc (73) is arranged at the top of the sealing connection ring (7) in a sealing rotation mode, a gas collecting tube (74) is fixedly arranged at the top of the sealing disc (73), and the gas collecting tube (74) is communicated with the output end of the air suction cylinder (51) and the first sealing cavity (71).
7. The coal glycol nitric acid reduction purification device according to claim 4, further comprising a liquid suction pipe (32) fixedly arranged on the outer wall of the installation shaft (3), wherein the output end and the input end of the liquid suction pipe (32) are both provided with a second check valve, a second piston (33) is arranged in the liquid suction pipe (32) in a sealing sliding manner, a push rod (34) is fixedly arranged on the side wall of the second piston (33), a second guide rod (35) is fixedly arranged at the end part of the push rod (34), and the second guide rod (35) extends into the guide groove (55) and abuts against the inner wall of the guide groove (55).
8. The coal glycol nitric acid reduction purification device according to claim 7, wherein a storage tank (11) for storing a reducing agent is arranged at the top of the tank body (1), and the output end of the storage tank (11) and the input end of the liquid suction pipe (32) are communicated with the second sealing cavity (72).
9. The coal glycol nitric acid reduction purification device according to claim 7, wherein the main shaft (2) is provided with a flow channel (22) extending into the installation shaft (3), the output end of the liquid suction pipe (32) is communicated with the flow channel (22), and the stirring rod (21) is provided with a plurality of liquid discharge holes (23) communicated with the flow channel (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311461302.4A CN117446948A (en) | 2023-11-06 | 2023-11-06 | Coal glycol nitric acid reduction purifying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311461302.4A CN117446948A (en) | 2023-11-06 | 2023-11-06 | Coal glycol nitric acid reduction purifying equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117446948A true CN117446948A (en) | 2024-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311461302.4A Pending CN117446948A (en) | 2023-11-06 | 2023-11-06 | Coal glycol nitric acid reduction purifying equipment |
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| CN (1) | CN117446948A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117482879A (en) * | 2023-12-29 | 2024-02-02 | 陕西红十月发展有限公司 | Mixing kettle for producing antifreeze fluid and production process thereof |
-
2023
- 2023-11-06 CN CN202311461302.4A patent/CN117446948A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117482879A (en) * | 2023-12-29 | 2024-02-02 | 陕西红十月发展有限公司 | Mixing kettle for producing antifreeze fluid and production process thereof |
| CN117482879B (en) * | 2023-12-29 | 2024-03-12 | 陕西红十月发展有限公司 | Mixing kettle for producing antifreeze fluid and production process thereof |
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