A method and device for producing low-energy water glass

Abstract

The present application relates to the technical field of water glass preparation, and particularly discloses a preparation method and a production device for producing water glass with low energy consumption, comprising a reaction tank. A manhole structure is arranged on the top of the reaction tank, the manhole structure is composed of a plug and a manhole, the plug is connected to the manhole under the drive of a hydraulic oil cylinder, and the manhole is blocked. An infrared temperature sensor and a pressure transmitter are arranged in a mounting groove at the bottom of the plug, and are used for detecting the temperature and the air pressure in the reaction tank, respectively. A line mounting cylinder is arranged and is used for connecting the wire connectors of the infrared temperature sensor and the pressure transmitter. After the line mounting cylinder is clamped into the wire connector docking groove, the sealing ring on the surface of the line mounting cylinder has a good sealing effect. The filling cavity in the line mounting cylinder is filled with a high-temperature-resistant waterproof sealant. After the plug is connected to the manhole, a sealed space is formed in the reaction tank, the pressure of the water glass raw material can be maintained, the leakage of the temperature and the air pressure is prevented, the reaction efficiency is improved, and the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water glass preparation, in particular to a preparation method and production device for producing water glass with low energy consumption. BACKGROUND

[0002] Sodium silicate (chemical formula: Na2SiO3), commonly known as water glass, is a colorless, transparent, viscous solid. Its aqueous solution is commonly known as water glass, which is a mineral binder. Its chemical formula is R2O·nSiO2, where R2O is an alkali metal oxide, and n is the molar ratio of silicon dioxide to alkali metal oxide, referred to as the modulus of water glass. Water glass has a very wide range of applications, almost covering all sectors of the national economy. In the chemical industry, it is used to produce silica gel, white carbon black, zeolite molecular sieve, sodium metasilicate pentahydrate, silica sol, layered silicon, and instant powdered sodium silicate, potassium sodium silicate, and other silicate products. It is a basic raw material for silicon compounds. In economically developed countries, there are more than 50 kinds of deep processing series products using sodium silicate as raw material, some of which have been applied in high-tech, precision, and cutting-edge technology fields. In light industry, it is an indispensable raw material for detergents such as laundry detergent and soap. It is also a water softener and a setting agent. In the textile industry, it is used for dyeing, bleaching, and sizing. In the machinery industry, it is widely used in casting, grinding wheel manufacturing, and metal corrosion prevention. In the construction industry, it is used to make fast-drying cement, acid-resistant cement, waterproof oil, soil stabilizer, and refractory materials. In agriculture, it can be used to produce silicon fertilizer. In addition, it is used as a silicon-aluminum catalyst for petroleum catalytic cracking, a filler for soap, an adhesive for corrugated paper, a high-temperature-resistant material for laboratory crucibles, a metal corrosion inhibitor, a water softener, a detergent aid, a refractory material and a ceramic raw material, a textile bleaching, dyeing, and sizing agent, a mine beneficiation agent, a waterproofing agent, a leak-stopping agent, a wood fireproofing agent, a food preservative, and a glue-making agent.

[0003] Currently, there are two methods for producing water glass: dry and wet. The dry method uses quartz sand and soda ash as raw materials and melts at high temperatures (1400°C-1600°C) for 4-6 hours to produce high modulus (>2.6, up to 3.7) water glass. This method is widely used, with a market share of over 90%. However, it has high energy consumption, requires a large number of equipment, and has high investment. The wet process uses quartz sand, sodium hydroxide, potassium hydroxide, and water as raw materials. The mixture is heated to 0.6-0.8 MPa and 158-169°C for 8-12 hours to produce sodium silicate and potassium silicate. The product is filtered by pressure or vacuum suction to obtain clear water glass solution. This method has a high solid residue, accounting for about 5-15% of the total amount, and the solid waste is discharged, which harms the ecological environment.

[0004] Therefore, a preparation method and production device for producing water glass with low energy consumption are proposed to solve the above problems. SUMMARY

[0005] The purpose of this invention is to provide a low-energy-consumption method and apparatus for producing water glass, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A low-energy-consumption production apparatus for producing water glass includes a reaction mechanism for mixing water glass raw materials, a cooling mechanism for reducing the temperature of the reaction products of the reaction mechanism, and a recycling mechanism for purifying water glass. The reaction mechanism includes a reaction tank with a stirring structure inside. A heating jacket is provided on the outer wall of the reaction tank. A medium addition port and a medium discharge port are respectively provided at the top and bottom of the heating jacket. An electric heating rod is fixedly installed on the inner wall of the heating jacket.

[0008] The top of the reaction vessel is equipped with a manhole structure, which includes a manhole fixedly installed on the top of the reaction vessel and extending into the reaction vessel at the bottom, and a plug movable inside the manhole. The bottom end of the plug is provided with an annular groove and an installation ring groove from top to bottom. An O-ring and a horn-shaped sealing ring are installed in the annular groove and the installation ring groove, respectively. The outer edges of the O-ring and the horn-shaped sealing ring are pressed and fitted against the inner wall of the manhole. The horn-shaped sealing ring has its large opening facing downward. The bottom end of the plug is provided with a fixing ring that is rotatably connected to the plug by a thread below the installation ring groove. An addition pipe is provided through the plug. The outer end of the addition pipe is provided with a pressure relief valve and a tee from top to bottom. An external connecting pipe is provided on the tee, and a one-way valve is provided on the external connecting pipe.

[0009] The plug has a mounting groove at its bottom and a wiring hole extending upwards from the top of the mounting groove. A connector mating groove is located at the bottom of the wiring hole. A mounting bracket is horizontally positioned inside the mounting groove, on which an infrared temperature sensor with its detection head facing downwards and a pressure transmitter are sequentially mounted. A wiring mounting cylinder is located inside the connector mating groove, and a sealing ring is located on the outer wall of the wiring mounting cylinder that fits snugly against the inner wall of the connector mating groove. A mounting block is located at the bottom of the wiring mounting cylinder, connected to it by a threaded connector. A connector for wiring the infrared temperature sensor and pressure transmitter is located on the mounting block. A wiring protrusion is located at the top of the wiring mounting cylinder. The external wiring of the connector extends from this protrusion and then along the wiring hole beyond the plug. Below the protrusion, a filling cavity is located inside the wiring mounting cylinder, filled with high-temperature resistant and waterproof sealant.

[0010] As a preferred embodiment, an outer edge plate is fixedly installed on the outer edge of the top of the manhole, and four sliding rods are installed at equal angles on the outer edge plate. A mounting plate is fixedly installed on the top of the sliding rods, and a sliding frame that slides on the sliding rods is fixedly installed on the top of the plug. A hydraulic cylinder is fixedly installed on the mounting plate, and the piston rod of the hydraulic cylinder is fixedly connected to the mounting frame.

[0011] As a preferred embodiment, the stirring structure includes a stirring motor fixedly mounted on the top of the reaction vessel and a stirring assembly driven by the stirring motor located inside the reaction vessel. The stirring assembly includes a stirring shaft, a spiral blade mounted on the stirring shaft, and a stirrer mounted on the stirring shaft. A cylindrical body is provided on the top plate of the reaction vessel. The stirring shaft passes through the cylindrical body upward and is rotatably connected to the inner wall of the cylindrical body through a sealed bearing. The motor shaft of the stirring motor is connected to the stirring shaft through a coupling.

[0012] As a preferred embodiment, the cooling mechanism includes a cooling tank located below the reaction vessel. The end caps at the left and right ends of the cooling tank are respectively provided with a feed pipe and a discharge pipe. The bottom of the reaction vessel is provided with a discharge pipe connected to the feed pipe, and a switch valve is provided on the discharge pipe. The top plate and bottom plate inside the cooling tank are respectively provided with an upper heat-conducting pipe and a lower heat-conducting pipe that are in contact with the inner wall of the cooling tank. A heat exchange pipe is arranged between the upper heat-conducting pipe and the lower heat-conducting pipe. The left end of the upper heat-conducting pipe is provided with a medium discharge pipe that extends out of the cooling tank, and the bottom right end of the lower heat-conducting pipe is provided with a medium addition pipe that extends out of the cooling tank.

[0013] A stainless steel filter plate is vertically installed on the left end cover of the cooling tank, to the right of the feed pipe. Below the end cover, to the left of the stainless steel filter plate, is a screw conveyor that extends out of the cooling tank at an angle to the upper left. A screw shaft is installed inside the screw conveyor. A lifting motor is fixedly installed at the left end of the screw conveyor, and the motor shaft of the lifting motor is connected to the screw shaft. A recycling outlet is installed at the bottom left end of the screw conveyor, and the height of the recycling outlet is higher than the height of the cooling tank.

[0014] As a preferred embodiment, an insertion cylinder is provided on the right end cap of the cooling tank, and a sealing head is provided on the insertion cylinder, which is inserted into the insertion cylinder from right to left. A flange is provided on the right end of the sealing head, and the flange of the sealing head is fixedly installed to the insertion cylinder by bolts. A Y-shaped sealing ring is provided on the surface of the sealing head to press and fit against the inner wall of the insertion cylinder. A temperature sensor is fixedly installed on the left end of the sealing head.

[0015] As a preferred option, the recycling mechanism includes a filtration structure and a sedimentation structure;

[0016] The filter structure includes a filter cartridge and a mounting end cap located at the right end of the filter cartridge. Several connecting grooves are provided on the side of the mounting end cap. A connecting protrusion is provided at the right end of the filter cartridge corresponding to the connecting groove. The connecting protrusion of the filter cartridge is inserted into the connecting groove and fixedly connected to the mounting end cap by screws. A mounting plug is fixedly provided on the left side panel of the mounting end cap. The surface of the mounting plug is in contact with the inner wall of the filter cartridge, and a sealing ring assembly is provided on the mounting plug to press and fit against the inner wall of the filter cartridge. A docking cylinder is fixedly provided at the left end of the mounting plug. A stainless steel filter cartridge is provided on the inner wall of the filter cartridge. The left end of the stainless steel filter cartridge is fixedly installed on the docking cylinder by a clamp.

[0017] The sedimentation structure includes a sedimentation tank with a hopper at the bottom and mounting holes on the hopper wall. A light-transmitting panel is fixedly installed inside the mounting holes and sealed to the edge of the mounting holes. An optical sensor with a detection head facing the inside of the sedimentation tank is fixedly installed on the light-transmitting panel. An installation cylinder is installed on the top plate of the sedimentation tank, and an end cap is installed on the installation cylinder. A nut is installed on the inner wall of the bottom of the end cap, and the nut is fixedly connected to the inner wall of the bottom of the end cap by a breathable connecting ring plate. The nut is fixedly installed on the top of the installation cylinder by threads. An installation column penetrating the installation cylinder is installed in the middle of the end cap, and a supplementary light is fixedly installed at the bottom of the installation column.

[0018] The installation plug has a transverse material passage pipe that runs through the installation plug and the connecting cylinder. The outer end of the material passage pipe is connected to the material output end of the supply pump, and the inlet end of the supply pump is connected to the outlet pipe of the cooling tank.

[0019] As a preferred embodiment, a supply pipe connected to a sedimentation tank is provided at the bottom right end of the filter cartridge, a finished product discharge pipe is provided at the bottom right side of the sedimentation tank, a waste discharge pipe is provided at the bottom of the hopper of the sedimentation tank, and valve bodies are provided on both the waste discharge pipe and the finished product discharge pipe.

[0020] A method for preparing low-energy-consumption water glass includes the following steps:

[0021] Step 1: Add liquid sodium hydroxide, liquid potassium hydroxide, quartz sand powder and water to the reaction vessel in sequence according to the ratio. Use an electric heating rod to heat the heat transfer medium for external heating. After the temperature reaches 160℃, fill the vessel with inert gas through the external pipe to make the internal pressure of the reaction vessel reach 1MPa. Maintain the temperature for 2 hours, then continue to raise the temperature to 200℃ and maintain the temperature for 5-6 hours to obtain crude water glass.

[0022] Step 2: Open the pressure relief valve to reduce the internal pressure of the reaction tank to 0.3MPa, then open the switch valve on the discharge pipe to use the residual pressure to introduce the coarse water glass into the cooling tank. The residual quartz sand powder is trapped by the stainless steel filter plate at the left end cap of the cooling tank and can be reused after being discharged by the screw conveyor. The liquid flows into the cooling tank and is cooled by the cooling medium passing through the heat exchange tube. When the water glass liquid temperature drops below 60℃, the supply pump runs to introduce the water glass liquid into the filter cartridge for secondary filtration.

[0023] Step 3: Pour the filtered water glass into a sedimentation tank and allow it to settle naturally for 12-24 hours. Then, discharge the sediment collected in the hopper to obtain pure water glass.

[0024] As can be seen from the above technical solution provided by the present invention, the beneficial effects of the low-energy-consumption method and apparatus for producing water glass provided by the present invention are:

[0025] 1. A manhole structure is installed at the top of the reaction vessel. This manhole structure consists of a plug and a manhole. The plug is driven by a hydraulic cylinder to connect with the manhole, thus sealing the manhole. An infrared temperature sensor and a pressure transmitter are installed in the mounting groove at the bottom of the plug to detect the temperature and pressure inside the reaction vessel, respectively. A wiring mounting cylinder is used to connect the terminals of the infrared temperature sensor and the pressure transmitter. After the wiring mounting cylinder is inserted into the terminal docking groove, the sealing ring on the surface of the wiring mounting cylinder provides a good sealing effect. The filling cavity inside the wiring mounting cylinder is filled with high-temperature resistant and waterproof sealant. When the plug is connected with the manhole, a sealed space is formed inside the reaction vessel, which can maintain the pressure of the water glass raw material. A spiral blade is installed on the stirring shaft inside the reaction vessel. During the stirring process, the material can be squeezed from top to bottom to form a circulating stirring of the material and improve the reaction efficiency.

[0026] 2. By installing a stainless steel filter plate inside the end cap on the left side of the cooling tank, unreacted quartz powder in the mixture can be effectively intercepted. The intercepted particles are discharged from the cooling tank by a screw conveyor for recycling and secondary reaction. The top and bottom of the inner wall of the cooling tank are respectively equipped with an upper heat conduction pipe and a lower heat conduction pipe, and a heat exchange pipe is installed between the upper heat conduction pipe and the lower heat conduction pipe. When the heat exchange medium enters from the lower heat conduction pipe, it flows into the heat exchange pipe and can cool the water glass inside the cooling tank. The cooled water glass is supplied to the filter cartridge by the supply pump. The stainless steel filter cartridge installed inside the filter cartridge can perform secondary filtration of the water glass.

[0027] 3. By installing a light-transmitting panel on the inner wall of the hopper at the bottom of the sedimentation tank, an optical sensor is installed on the light-transmitting panel. When the supplementary light is turned on, the optical sensor can detect whether there is sediment on the inner wall of the hopper. If there is sediment, the valve on the discharge pipe is opened to discharge the impurities until the water glass inside the hopper becomes clear. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a low-energy-consumption water glass production device according to the present invention.

[0029] Figure 2 This is a schematic diagram of the manhole structure in this invention;

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of the plug in this invention;

[0031] Figure 4 This is a schematic diagram of the trumpet-shaped sealing ring structure in this invention;

[0032] Figure 5 This is a schematic diagram of the circuit mounting cylinder structure in this invention;

[0033] Figure 6 This is a schematic diagram of the cooling tank structure in this invention;

[0034] Figure 7 This is a schematic diagram of the filter cartridge structure in this invention;

[0035] Figure 8 This is a schematic diagram of the sedimentation tank structure in this invention.

[0036] In the diagram: 1. Reaction vessel; 11. Heating jacket; 12. Electric heating rod; 13. Medium addition port; 14. Medium discharge port; 15. Discharge pipe; 16. Switch valve; 2. Stirring motor; 21. Stirring shaft; 22. Spiral blade; 23. Agitator; 3. Manhole structure; 31. Manhole; 32. Outer edge plate; 33. Slide rod; 34. Mounting plate; 35. Hydraulic cylinder; 36. Plug; 361. Addition pipe; 362. T-junction; 363. Pressure relief valve; 364. External pipe; 365. Check valve; 3 66. Retaining ring; 367. Mounting ring groove; 368. Horn-shaped sealing ring; 369. O-ring seal; 37. Sliding bracket; 4. Mounting groove; 41. Wiring hole; 411. Terminal mating groove; 42. Mounting bracket; 43. Infrared temperature sensor; 44. Pressure transmitter; 45. Wiring mounting sleeve; 451. Wiring protrusion; 452. Sealing ring; 453. Mounting ring plate; 454. Screw hole; 455. Mounting block; 456. Terminal; 457. Threaded mating head; 458. Filling cavity; 5. Cooling tank; 501. Screw conveyor; 502. Stainless steel filter plate; 503. Screw shaft; 504. Recycled material discharge port; 505. Lifting motor; 51. Feed pipe; 52. Discharge pipe; 53. Lower heat conduction pipe; 54. Upper heat conduction pipe; 55. Heat exchanger pipe; 56. Fixing component; 57. Medium discharge pipe; 58. Medium addition pipe; 59. Insertion cylinder; 591. Sealing head; 592. End cap; 593. Y-type sealing ring; 594. Temperature sensor; 6. Supply pump; 7. Filter cylinder; 7 1. Install end cap; 72. Fixing collar; 73. Connecting protrusion; 74. Connecting groove; 75. Install plug; 76. Connecting cylinder; 77. Sealing ring assembly; 78. Stainless steel filter cylinder; 781. Clamp; 79. Supply pipe; 8. Sedimentation tank; 81. Impurity discharge pipe; 82. Finished product discharge pipe; 83. Installing cylinder; 831. End cap; 832. Nut; 833. Ventilation connecting ring plate; 834. Installing column; 835. Supplemental light; 84. Mounting hole; 841. Light-transmitting panel; 85. Optical sensor. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0038] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0039] like Figures 1-8 As shown, this embodiment of the invention provides a low-energy-consumption production apparatus for producing water glass, including a reaction mechanism for mixing water glass raw materials, a cooling mechanism for reducing the temperature of the reaction products of the reaction mechanism, and a recycling mechanism for purifying water glass.

[0040] Please see Figure 1 The reaction mechanism includes a reaction vessel 1, which is equipped with a stirring structure inside. A heating jacket 11 is provided on the outer wall of the reaction vessel 1. A medium addition port 13 and a medium discharge port 14 are respectively provided at the top and bottom of the heating jacket 11. An electric heating rod 12 is fixedly installed on the inner wall of the heating jacket 11. The heat transfer medium inside the heating jacket 11 can be heat transfer oil, which is added to the heating jacket 11 through the medium addition port 13 as needed. The heating of the electric heating rod 12 is controlled by a temperature relay. The temperature probe of the temperature relay is an infrared temperature sensor 43 installed in the plug 36, which is used to control and adjust the temperature inside the reaction vessel 1. The temperature relay is controlled by a PLC control system.

[0041] Furthermore, the stirring structure includes a stirring motor 2 fixedly installed on the top of the reaction tank 1 and a stirring assembly driven by the stirring motor 2 installed inside the reaction tank 1. The stirring assembly includes a stirring shaft 21, a spiral blade 22 installed on the stirring shaft 21, and a stirrer 23 installed on the stirring shaft 21. A cylinder is provided on the top plate of the reaction tank 1. The stirring shaft 21 passes through the cylinder upward and is rotatably connected to the inner wall of the cylinder through a sealed bearing. The motor shaft of the stirring motor 2 is connected to the stirring shaft 21 through a coupling. The spiral blade 22 is provided on the stirring shaft 21. During the stirring process, the material can be squeezed from top to bottom to form a circulating stirring of the material, accelerate the mixing of the material, and improve the reaction efficiency.

[0042] Please see Figures 2-4A manhole structure 3 is provided at the top of the reaction vessel 1. The manhole structure 3 includes a manhole 31 fixedly installed at the top of the reaction vessel 1 and extending into the reaction vessel 1 at the bottom, and a plug 36 movably installed inside the manhole 31. The bottom end of the plug 36 has an annular groove and an installation ring groove 367 arranged sequentially from top to bottom. An O-ring 369 and a horn-shaped sealing ring 368 are respectively installed in the annular groove and the installation ring groove 367. The outer edges of the O-ring 369 and the horn-shaped sealing ring 368 are pressed and fitted against the inner wall of the manhole 31. The horn-shaped sealing ring 368 has a large opening. Facing downwards, the bottom end of the plug 36 is provided with a fixing ring 366 that is rotatably connected to the plug 36 via a thread below the mounting ring groove 367. The plug 36 is provided with an adding pipe 361 that penetrates the plug 36. The outer end of the adding pipe 361 is provided with a pressure relief valve 363 and a tee 362 from top to bottom. The tee 362 is provided with an external connecting pipe 364, and the external connecting pipe 364 is provided with a one-way valve 365. The function of the O-ring sealing ring 369 and the horn-shaped sealing ring 368 is to seal the manhole 31 and achieve a good sealing effect.

[0043] Specifically, the trumpet-shaped sealing ring 368 is a 165° open rubber ring with the opening facing downwards. When the gas pressure inside the reaction vessel 1 increases, the gas enters the gap between the plug 36 and the manhole 31 and gathers below the trumpet-shaped sealing ring 368. Under the action of the gas pressure, the outer side of the trumpet-shaped sealing ring 368 is squeezed horizontally and further squeezed and adhered to the inner wall of the manhole 31, thereby improving the sealing performance between the plug 36 and the inner wall of the manhole 31.

[0044] Furthermore, an outer edge plate 32 is fixedly installed on the top outer edge of the manhole 31, and four sliding rods 33 are installed at equal angles on the outer edge plate 32. An mounting plate 34 is fixedly installed on the top of the sliding rods 33, and a sliding frame 37 that slides on the sliding rods 33 is fixedly installed on the top of the plug 36. A hydraulic cylinder 35 is fixedly installed on the mounting plate 34, and the piston rod of the hydraulic cylinder 35 is fixedly connected to the sliding frame 37. The extension and retraction of the piston rod of the hydraulic cylinder 35 can drive the plug 36 to move, thereby achieving the sealing and opening of the manhole 31. The opening of the manhole 31 is used for the addition of materials.

[0045] For further information, please refer to [link / reference]. Figure 3 and Figure 5The plug 36 has a mounting groove 4 at its bottom, and a wiring hole 41 extending upwards from the plug 36 at the top of the mounting groove 4. A connector mating groove 411 is located at the bottom of the wiring hole 41. A mounting bracket 42 is horizontally arranged inside the mounting groove 4. An infrared temperature sensor 43 with its detection head facing downwards and a pressure transmitter 44 are sequentially mounted on the mounting bracket 42. A wiring mounting cylinder 45 is located inside the connector mating groove 411. A sealing ring 452, which fits against the inner wall of the connector mating groove 411, is located on the outer wall of the wiring mounting cylinder 45. A mounting block 455 is located at the bottom of the wiring mounting cylinder 45 and is threadedly connected to the wiring mounting cylinder 45 via a mating thread head 457. A connector 456 for wiring the infrared temperature sensor 43 and the pressure transmitter 44 is located on the mounting block 455. The top of the wiring mounting cylinder 45... The unit is provided with a line outlet 451. The external line of the connector 456 extends out from the line outlet 451 and then extends out of the plug 36 through the line hole 41. The line outlet 451 extends to the line mounting cylinder 45 below and is provided with a filling cavity 458. The filling cavity 458 is filled with high temperature resistant and waterproof sealant. During installation, the output lines of the infrared temperature sensor 43 and the pressure transmitter 44 are connected to the corresponding connectors 456. Then, the mounting block 455 is installed on the line mounting cylinder 45. After the line mounting cylinder 45 is inserted into the connector mating groove 411, the sealing ring 452 is provided on the surface of the line mounting cylinder 45. The sealing ring 452 is pressed and adhered to the inner wall of the connector mating groove 411 to achieve a seal, which can effectively prevent gas from escaping from this point and effectively maintain the gas pressure and temperature inside the reaction vessel 1.

[0046] The infrared temperature sensor 43 is used to detect the internal temperature of the reaction vessel 1 and provide temperature information for the operation of the electric heating rod 12. The pressure transmitter 44 is used to detect the internal air pressure of the reaction vessel 1 and provide air pressure data for the opening and closing of the pressure relief valve 363. The pressure transmitter 44 is connected to the PLC control system, and the pressure relief valve 363 is controlled by the PLC control system.

[0047] Please see Figure 1 and Figure 6 The cooling mechanism includes a cooling tank 5 located below the reaction tank 1. The end caps at the left and right ends of the cooling tank 5 are respectively provided with a feed pipe and a discharge pipe 52. The bottom of the reaction tank 1 is provided with a discharge pipe 15 connected to the feed pipe, and a switch valve 16 is provided on the discharge pipe 15. The top plate and bottom plate inside the cooling tank 5 are respectively provided with an upper heat conduction pipe 54 and a lower heat conduction pipe 53 that are in contact with the inner wall of the cooling tank 5. A heat exchange pipe 55 is arranged between the upper heat conduction pipe 54 and the lower heat conduction pipe 53. The left end of the upper heat conduction pipe 54 is provided with a medium discharge pipe 57 that extends out of the cooling tank 5. The bottom right end of the lower heat conduction pipe 53 is provided with a medium addition pipe 58 that extends out of the cooling tank 5. The medium addition pipe 58 can be connected to a cooling system. The cooling system includes a liquid cooling system or can be directly connected to tap water for cooling.

[0048] Furthermore, a stainless steel filter plate 502 is vertically installed on the left end cap of the cooling tank 5 to the right of the feed pipe 51, and a spiral elevator 501 is installed below the end cap to the left of the stainless steel filter plate 502, extending out of the cooling tank 5 at an angle to the upper left corner. A spiral shaft 503 is rotatably installed inside the spiral elevator 501, and a lifting motor 505 is fixedly installed at the left end of the spiral elevator 501. The motor shaft of the lifting motor 505 is connected to the spiral shaft 503. A recovery material discharge port 504 is provided at the bottom of the left end of the spiral elevator 501. The height of the recovery material discharge port 504 is higher than the height of the cooling tank 5. By installing the stainless steel filter plate 502 inside the end cap at the left end of the cooling tank 5, unreacted quartz powder in the mixture can be effectively intercepted. The intercepted particles are discharged out of the cooling tank 5 by the spiral elevator 501 for recovery and use in secondary reactions.

[0049] For further information, please refer to [link / reference]. Figure 6 An insertion cylinder 59 is provided on the right end cap of the cooling tank 5. A sealing head 591 is provided on the insertion cylinder 59 and inserted into the insertion cylinder 59 from right to left. A flange is provided on the right end of the sealing head 591. The flange of the sealing head 591 is fixedly installed to the insertion cylinder 59 by bolts. A Y-shaped sealing ring 593 is provided on the surface of the sealing head 591 and is pressed and fitted against the inner wall of the insertion cylinder 59. A temperature sensor 594 is fixedly provided on the left end of the sealing head 591. The temperature sensor 594 is used to detect the temperature of the water glass inside the cooling tank 5. When the temperature drops to 70°C, the supply pump 6 runs and supplies water glass to the filter cartridge 7. At the same time, the supply of cooling medium to the medium addition pipe 58 is stopped. The detection signal output terminal of the temperature sensor 594 is connected to the PLC control system. The supply pump 6 is controlled by the PLC control system.

[0050] Please see Figures 7-8 The recycling mechanism includes a filtration structure and a sedimentation structure;

[0051] The filter structure includes a filter cylinder 7 and a mounting end cap 71 located at the right end of the filter cylinder 7. Several connecting grooves 74 are provided on the side of the mounting end cap 71. A connecting protrusion 73 is provided at the right end of the filter cylinder 7 corresponding to the connecting grooves 74. The connecting protrusion 73 of the filter cylinder 7 is inserted into the connecting grooves 74 and fixedly connected to the mounting end cap 71 by screws. A mounting plug 75 is fixedly provided on the left side panel of the mounting end cap 71. The surface of the mounting plug 75 is in contact with the inner wall of the filter cylinder 7, and a sealing ring assembly 77 is provided on the mounting plug 75 to press and fit against the inner wall of the filter cylinder 7. A sealing ring assembly 77 is fixedly provided at the left end of the mounting plug 75. The filter cylinder 7 has a docking cylinder 76 and a stainless steel filter cylinder 78 installed on the inner wall of the filter cylinder 7. The left end of the stainless steel filter cylinder 78 is fixedly installed on the docking cylinder 76 by a clamp 781. The mounting end cap 71 and the filter cylinder 7 are fixedly installed by fixing screws, which is convenient for disassembly. The mounting plug 75 is equipped with a sealing ring group 77 that presses against the inner wall of the filter cylinder 7. When the mounting end cap 71 and the filter cylinder 7 are docked, the mounting plug 75 seals against the inner wall of the filter cylinder 7. This structure is easy to assemble and disassemble, can withstand large water pressure, and has no risk of leakage. The stainless steel filter cylinder 78 is used to filter residual quartz powder and other unreacted substances.

[0052] The sedimentation structure includes a sedimentation tank 8, with a hopper at the bottom and mounting holes 84 on the hopper wall. A light-transmitting panel 841, sealingly fitted to the edge of the mounting hole 84, is fixedly installed inside the mounting hole 84. An optical sensor 85, with its detection head facing the inside of the sedimentation tank 8, is fixedly installed on the light-transmitting panel 841. A mounting cylinder 83 is installed on the top plate of the sedimentation tank 8, with an end cap 831 on it. A nut 832 is installed on the inner wall of the bottom of the end cap 831, and the nut 832 is fixedly connected to the inner wall of the bottom of the end cap 831 by a breathable connecting ring plate 833. The nut 832 is threadedly fixed to the top of the mounting cylinder 83. A mounting post penetrating downwards through the mounting cylinder 83 is provided in the middle of the end cap 831. 834, a supplementary light 835 is fixedly installed at the bottom of the mounting column 834, a supply pipe 79 connected to the sedimentation tank 8 is installed at the bottom right end of the filter cylinder 7, a finished product discharge pipe 82 is installed at the bottom right side of the sedimentation tank 8, a waste discharge pipe 81 is installed at the bottom of the hopper of the sedimentation tank 8, and valves are installed on both the waste discharge pipe 81 and the finished product discharge pipe 82. The supplementary light 835 is used to provide a light source for the optical sensor 85. When sediment accumulates inside the hopper, the optical sensor 85 cannot detect the brightness of the light source. After the sediment inside the hopper is discharged, the optical sensor 85 can detect the brightness and transmit the detection information to the PLC control system. The PLC control system closes the valve of the waste discharge pipe 81 and opens the valve of the finished product discharge pipe 82 to discharge clear water glass.

[0053] The installation plug 75 has a material passage pipe that runs horizontally through the installation plug 75 and the docking cylinder 76. The outer end of the material passage pipe is connected to the material output end of the supply pump 6, and the inlet end of the supply pump 6 is connected to the outlet pipe 52 of the cooling tank 5.

[0054] The method for producing water glass using the above-mentioned water glass production apparatus includes the following steps:

[0055] Step 1: Add 200 kg of liquid sodium hydroxide (50% NaOH), 190 kg of liquid potassium hydroxide (45% KOH), 200 kg of quartz sand powder (silica content not less than 98%) and 300 kg of water to the reaction vessel in sequence according to the proportion. Use an electric heating rod to heat the heat transfer medium for external heating. After the temperature reaches 160℃, inert gas is introduced through the external pipe to make the internal pressure of the reaction vessel reach 1 MPa. Maintain the temperature for 2 hours, and then continue to raise the temperature to 200℃ and maintain the temperature for 5-6 hours to obtain crude water glass.

[0056] Step 2: Open the pressure relief valve to reduce the internal pressure of the reaction tank to 0.3MPa, then open the switch valve on the discharge pipe to use the residual pressure to introduce the coarse water glass into the cooling tank. The residual quartz sand powder is trapped by the stainless steel filter plate at the left end cover of the cooling tank and can be reused after being discharged by the screw conveyor. The liquid flows into the cooling tank and is cooled by the cooling medium passing through the heat exchange tube. When the water glass liquid temperature drops below 60℃, the supply pump 6 is started to introduce the water glass liquid into the filter cartridge for secondary filtration.

[0057] Step 3: Pour the filtered water glass into a sedimentation tank and allow it to settle naturally for 12-24 hours. Then, discharge the sediment collected in the hopper to obtain pure water glass.

[0058] Furthermore, the control logic of the PLC control system is the same as that of the water glass processing method.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-energy-consumption production apparatus for producing water glass, comprising a reaction unit for mixing water glass raw materials, a cooling unit for reducing the temperature of the reaction products from the reaction unit, and a recycling unit for purifying the water glass, characterized in that: The reaction mechanism includes a reaction vessel (1), which is equipped with a stirring structure inside. A heating jacket (11) is provided on the outer wall of the reaction vessel (1). A medium addition port (13) and a medium discharge port (14) are provided at the top and bottom of the heating jacket (11) respectively. An electric heating rod (12) is fixedly provided on the inner wall of the heating jacket (11). The reaction vessel (1) is provided with a manhole structure (3) at the top. The manhole structure (3) includes a manhole (31) fixedly installed at the top of the reaction vessel (1) and extending into the reaction vessel (1) at the bottom, and a plug (36) movably installed in the manhole (31). The bottom end of the plug (36) is provided with an annular groove and an installation ring groove (367) from top to bottom. An O-ring seal (369) and a horn-shaped seal (368) are respectively installed in the annular groove and the installation ring groove (367). The outer edges of the O-ring seal (369) and the horn-shaped seal (368) are connected to the manhole. The inner wall of 31) is squeezed and fitted, the large opening of the horn-shaped sealing ring (368) faces downward, the bottom end of the plug (36) is provided with a fixing ring (366) which is rotatably connected to the plug (36) by a thread below the mounting ring groove (367), the plug (36) is provided with an adding tube (361) that penetrates the plug (36), the outer end of the adding tube (361) is provided with a pressure relief valve (363) and a tee (362) from top to bottom, and the tee (362) is provided with an outer connecting pipe (364), and the outer connecting pipe (364) is provided with a one-way valve (365). The plug (36) has a mounting groove (4) at its bottom, and a wiring hole (41) extending upwards from the plug (36) at the top of the mounting groove (4). A connector mating groove (411) is provided at the bottom of the wiring hole (41). A mounting bracket (42) is horizontally arranged inside the mounting groove (4). An infrared temperature sensor (43) with its detection head facing downwards and a pressure transmitter (44) are arranged sequentially on the mounting bracket (42). A wiring mounting cylinder (45) is provided inside the connector mating groove (411). A sealing ring (452) is provided on the outer wall of the wiring mounting cylinder (45) to fit against the inner wall of the connector mating groove (411). 5) A mounting block (455) is provided at the bottom and is threadedly connected to the line mounting cylinder (45) via a mating thread head (457). A connector (456) for wiring the infrared temperature sensor (43) and the pressure transmitter (44) is provided on the mounting block (455). A line extension port (451) is provided at the top of the line mounting cylinder (45). The external line of the connector (456) extends out from the line extension port (451) and extends out of the plug (36) along the line hole (41). A filling cavity (458) is provided below the line extension port (451) and extends into the line mounting cylinder (45). The filling cavity (458) is filled with high-temperature resistant and waterproof sealant. The cooling mechanism includes a cooling tank (5) located below the reaction tank (1). The end caps at the left and right ends of the cooling tank (5) are respectively provided with a feed pipe and a discharge pipe (52). The bottom of the reaction tank (1) is provided with a discharge pipe (15) connected to the feed pipe, and a switch valve (16) is provided on the discharge pipe (15). The top plate and bottom plate inside the cooling tank (5) are respectively provided with an upper heat conduction pipe (54) and a lower heat conduction pipe (53) that are in contact with the inner wall of the cooling tank (5). A heat exchange pipe (55) is arranged between the upper heat conduction pipe (54) and the lower heat conduction pipe (53). The left end of the upper heat conduction pipe (54) is provided with a medium discharge pipe (57) extending out of the cooling tank (5), and the bottom right end of the lower heat conduction pipe (53) is provided with a medium addition pipe (58) extending out of the cooling tank (5). A stainless steel filter plate (502) is vertically installed on the left end cap of the cooling tank (5) to the right of the feed pipe (51), and a spiral elevator (501) is installed below the end cap to the left of the stainless steel filter plate (502) and extends out of the cooling tank (5) at an angle to the upper left corner. A spiral shaft (503) is rotatably installed inside the spiral elevator (501). A lifting motor (505) is fixedly installed at the left end of the spiral elevator (501), and the motor shaft of the lifting motor (505) is connected to the spiral shaft (503). A recycling outlet (504) is provided at the bottom of the left end of the spiral elevator (501), and the height of the recycling outlet (504) is higher than the height of the cooling tank (5).

2. The low-energy-consumption water glass production apparatus according to claim 1, characterized in that: An outer edge plate (32) is fixedly installed on the top outer edge of the manhole (31), and four sliding rods (33) are installed at equal angles on the outer edge plate (32). An mounting plate (34) is fixedly installed on the top of the sliding rods (33). A sliding frame (37) that slides on the sliding rods (33) is fixedly installed on the top of the plug (36). A hydraulic cylinder (35) is fixedly installed on the mounting plate (34), and the piston rod of the hydraulic cylinder (35) is fixedly connected to the sliding frame (37).

3. The low-energy-consumption production apparatus for producing water glass according to claim 1, characterized in that: The stirring structure includes a stirring motor (2) fixedly installed on the top of the reaction tank (1) and a stirring assembly driven by the stirring motor (2) installed inside the reaction tank (1). The stirring assembly includes a stirring shaft (21), a spiral blade (22) installed on the stirring shaft (21), and a stirrer (23) installed on the stirring shaft (21). A cylinder is provided on the top plate of the reaction tank (1). The stirring shaft (21) extends upward through the cylinder and is rotatably connected to the inner wall of the cylinder through a sealed bearing. The motor shaft of the stirring motor (2) is connected to the stirring shaft (21) through a coupling.

4. The low-energy-consumption production apparatus for producing water glass according to claim 1, characterized in that: An insertion cylinder (59) is provided on the right end cap of the cooling tank (5). A sealing head (591) is provided on the insertion cylinder (59) and inserted into the insertion cylinder (59) from right to left. A flange is provided on the right end of the sealing head (591). The flange of the sealing head (591) is fixedly installed to the insertion cylinder (59) by bolts. A Y-shaped sealing ring (593) is provided on the surface of the sealing head (591) and pressed against the inner wall of the insertion cylinder (59). A temperature sensor (594) is fixedly provided on the left end of the sealing head (591).

5. The low-energy-consumption production apparatus for producing water glass according to claim 1, characterized in that: The recycling mechanism includes a filtration structure and a sedimentation structure; The filter structure includes a filter cylinder (7) and an installation end cap (71) located at the right end of the filter cylinder (7). Several connecting grooves (74) are provided on the side of the installation end cap (71). A connecting protrusion (73) is provided at the right end of the filter cylinder (7) corresponding to the connecting grooves (74). The connecting protrusion (73) of the filter cylinder (7) is inserted into the connecting grooves (74) and fixedly connected to the installation end cap (71) by screws. An installation plug (75) is fixedly provided on the left side panel of the installation end cap (71). The surface of the installation plug (75) is in contact with the inner wall of the filter cylinder (7), and a sealing ring group (77) is provided on the installation plug (75) to press and fit against the inner wall of the filter cylinder (7). A docking cylinder (76) is fixedly provided at the left end of the installation plug (75). A stainless steel filter cylinder (78) is provided on the inner wall of the filter cylinder (7). The left end of the stainless steel filter cylinder (78) is fixedly installed on the docking cylinder (76) by a clamp (781). The sedimentation structure includes a sedimentation tank (8), a hopper at the bottom of the sedimentation tank (8), and a mounting hole (84) on the wall of the hopper. A light-transmitting panel (841) is fixedly installed inside the mounting hole (84) and sealed to the edge of the mounting hole (84). An optical sensor (85) with a detection head facing the inside of the sedimentation tank (8) is fixedly installed on the light-transmitting panel (841). An mounting cylinder (83) is provided on the top plate of the sedimentation tank (8), and the mounting cylinder (83) is equipped with... An end cap (831) is provided, and a nut (832) is provided on the inner wall of the bottom of the end cap (831). The nut (832) is fixedly connected to the inner wall of the bottom of the end cap (831) by a breathable connecting ring plate (833). The nut (832) is fixedly installed on the top of the mounting cylinder (83) by threads. A mounting post (834) is provided in the middle of the end cap (831) and extends downward through the mounting cylinder (83). A supplementary light (835) is fixedly provided at the bottom of the mounting post (834). The installation plug (75) is provided with a material passage pipe that runs horizontally through the installation plug (75) and the docking cylinder (76), and the outer end of the material passage pipe is connected to the material output end of the supply pump (6), and the inlet end of the supply pump (6) is connected to the outlet pipe (52) of the cooling tank (5).

6. The low-energy-consumption production apparatus for producing water glass according to claim 5, characterized in that: The filter cylinder (7) is provided with a supply pipe (79) connected to the sedimentation tank (8) at the bottom right end. The sedimentation tank (8) is provided with a finished product discharge pipe (82) at the bottom right side. The sedimentation tank (8) is provided with a waste discharge pipe (81) at the bottom of the hopper. Both the waste discharge pipe (81) and the finished product discharge pipe (82) are provided with valve bodies.

7. A method for preparing low-energy-consumption water glass based on the production apparatus according to any one of claims 1-6, characterized in that: Includes the following steps: Step 1: Add liquid sodium hydroxide, liquid potassium hydroxide, quartz sand powder and water to the reaction vessel in sequence according to the ratio. Use an electric heating rod to heat the heat transfer medium for external heating. After the temperature reaches 160℃, fill the vessel with inert gas through the external pipe to make the internal pressure of the reaction vessel reach 1MPa. Maintain the temperature for 2 hours, then continue to raise the temperature to 200℃ and maintain the temperature for 5-6 hours to obtain crude water glass. Step 2: Open the pressure relief valve to reduce the internal pressure of the reaction tank to 0.3MPa, then open the switch valve on the discharge pipe to use the residual pressure to introduce the coarse water glass into the cooling tank. The residual quartz sand powder is trapped by the stainless steel filter plate at the left end cap of the cooling tank and can be reused after being discharged by the screw conveyor. The liquid flows into the cooling tank and is cooled by the cooling medium passing through the heat exchange tube. When the water glass liquid temperature drops below 60℃, the supply pump runs to introduce the water glass liquid into the filter cartridge for secondary filtration. Step 3: Pour the filtered water glass into a sedimentation tank and allow it to settle naturally for 12-24 hours. Then, discharge the sediment collected in the hopper to obtain pure water glass.

Images