Dissolving kettle for liquid sodium silicate production

Abstract

The utility model discloses a kind of for liquid sodium silicate production's dissolving kettle, belong to liquid sodium silicate processing technical field, including support seat, the side of support seat is provided with heat conducting oil conveying part, the upper side of support seat is provided with kettle body shell, the upper side of kettle body shell is provided with kettle body cover, the inner side of kettle body shell is provided with kettle body inner shell, heat conducting oil cavity is provided between kettle body inner shell and kettle body shell, the inner side wall of kettle body inner shell is provided with several cavity grating, cavity grating and heat conducting oil cavity are set with intercommunicating structure, the side of kettle body cover is provided with stirring assembly, the utility model kettle body shell and kettle body inner shell form independent heat conducting oil cavity, cooperate with cavity grating structure that intercommunication, contact area of heat exchange is greatly expanded, so that heat conducting oil heat can multidimensional transmission to material from kettle inner wall and cavity grating, significantly improve heat utilization efficiency.

Description

Technical Field

[0001] This utility model relates to a dissolving kettle for the production of liquid sodium silicate, belonging to the field of liquid sodium silicate processing technology. Background Technology

[0002] Liquid sodium silicate, as an important inorganic chemical raw material, is widely used in many fields such as construction, chemical industry, textile, and papermaking. In its production process, the dissolving kettle is the core equipment to realize the full dissolution reaction of solid sodium silicate with water and other auxiliary materials. The dissolution efficiency and dissolution quality directly affect the purity, concentration and production energy consumption of the product.

[0003] In practical applications, existing liquid sodium silicate dissolving kettles typically employ a single cavity in the outer shell for heating with heat transfer oil or steam. Heat is transferred to the material only through the inner wall of the kettle, resulting in a limited heat exchange area and uneven heating of the material. Material near the kettle wall is prone to localized overheating, while the central area heats up slowly. This not only prolongs the dissolving time but may also lead to material deterioration due to localized overheating, affecting product quality stability. Furthermore, although some equipment incorporates internal heating components, these components are prone to interference with the stirring mechanism, and the heating medium flow is often obstructed, resulting in low heat utilization efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a dissolving kettle for the production of liquid sodium silicate.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A dissolving vessel for producing liquid sodium silicate includes a support base, a heat transfer oil conveying section on one side of the support base, a vessel shell on the upper side of the support base, a vessel cover on the upper side of the vessel shell, an inner vessel shell on the inner side of the vessel shell, a heat transfer oil cavity between the inner vessel shell and the vessel shell, a plurality of hollow grates on the inner wall of the inner vessel shell, the hollow grates being connected to the heat transfer oil cavity, and a stirring assembly on one side of the vessel cover.

[0006] Through the above technical solution, the support base provides stable support for the entire dissolving vessel, the heat transfer oil conveying unit is responsible for providing the heating medium, the outer shell of the vessel and the inner shell of the vessel form a closed heat transfer oil cavity, the heat transfer oil conveyed by the heat transfer oil conveying unit can flow in this cavity to achieve heat transfer, the hollow grate on the inner side wall of the inner shell of the vessel is connected to the heat transfer oil cavity, so that the heat transfer oil can enter the interior of the hollow grate, thereby heating the material in the vessel through the inner shell wall and the hollow grate, and the stirring component operates on one side of the vessel lid to stir the material in the vessel and promote the rapid dissolution of the material in the heating environment.

[0007] The heat-conducting oil cavity formed by the outer shell and inner shell of the vessel, along with the interconnected hollow grate, enables multi-directional heating of the material inside the vessel, increasing the heating area. Combined with the stirring action of the stirring components, it can effectively improve the uniformity of material heating, accelerate the dissolution rate of liquid sodium silicate, and improve production efficiency.

[0008] Preferably, the stirring assembly includes a drive motor, which is disposed on the upper side of the vessel cover. The output shaft end of the drive motor is provided with a drive rod, and a plurality of stirring racks are provided on the outer side of the drive rod. The clearance of the stirring racks matches the clearance of the cavity grate. The bottom end of the drive rod is provided with a bottom scraper, and one side of the bottom scraper abuts against the inner bottom of the vessel shell.

[0009] Through the above technical solution, the drive motor in the stirring assembly provides power, which drives the drive rod to rotate through the output shaft. The drive rod then drives the outer stirring frame to rotate. Since the clearance of the stirring frame matches the clearance of the cavity grate, the stirring frame can avoid interference with the cavity grate when rotating. The bottom scraper at the bottom of the drive rod rotates with the drive rod, and one side of it abuts against the bottom of the inner shell of the vessel, which can scrape off the material deposited at the bottom.

[0010] The matching gap design between the stirring rack and the hollow grate ensures smooth stirring and avoids mechanical interference during equipment operation; the bottom scraper prevents materials from settling at the bottom of the inner shell of the vessel, ensuring that materials fully participate in the dissolution reaction, improving raw material utilization, reducing subsequent cleaning difficulty, and enhancing equipment operation stability.

[0011] Preferably, the upper side of the vessel lid is provided with several material connection ports.

[0012] Through the above technical solution, several material connection ports on the kettle body cover can be connected to external raw material conveying pipelines or auxiliary material adding devices. Through these connection ports, solid raw materials and liquid auxiliary materials required for the production of liquid sodium silicate can be added to the inner shell of the kettle.

[0013] The multiple material connection ports enable the simultaneous or separate addition of various materials, meeting the feeding requirements of different production formulas, improving the flexibility and convenience of feeding operations, facilitating automated feeding control, and reducing the intensity of manual operation.

[0014] Preferably, a plurality of discharge pipes are provided on the lower side of the outer shell of the vessel body, the discharge pipes are configured to communicate with the inner shell of the vessel body, a collection box is provided at one end of the discharge pipes, and a one-way control valve is provided on the lower side of the collection box.

[0015] Through the above technical solution, the dissolved liquid sodium silicate in the inner shell of the reactor can flow into the collection box through the discharge pipe connected to it. The one-way control valve on the lower side of the collection box can control the timing and amount of liquid sodium silicate discharge. The one-way structure can prevent material backflow.

[0016] The discharge pipe and the collection box work together to achieve centralized collection of the dissolved material. The one-way control valve makes the discharge process controllable, avoids the discharge of material under unexpected conditions, reduces material waste and environmental pollution, and facilitates precise docking with subsequent production processes.

[0017] Preferably, the heat transfer oil conveying section includes a side plate, which is disposed on one side of the support base. A heat transfer oil storage tank is disposed below the side plate. A pumping assembly is disposed on the upper side of the heat transfer oil storage tank. An electric heating heat transfer oil device is disposed on one side of the pumping assembly. The electric heating heat transfer oil device is disposed on the upper side of the side plate. A hot oil conveying pipe is disposed on one side of the electric heating heat transfer oil device. The hot oil conveying pipe is configured to communicate with the heat transfer oil cavity. An overflow return pipe is disposed at the top of the heat transfer oil cavity. One end of the overflow return pipe is connected to one side of the heat transfer oil storage tank.

[0018] Through the above technical solution, the heat transfer oil storage tank stores the heat transfer oil, the pumping component pumps the heat transfer oil from the storage tank to the electric heating heat transfer oil device, and the heated heat transfer oil enters the heat transfer oil cavity through the hot oil delivery pipe to heat the material in the vessel. The overflow return pipe at the top of the heat transfer oil cavity returns the excess or heat-exchanged heat transfer oil in the cavity back to the heat transfer oil storage tank, forming a heat transfer oil circulation system.

[0019] The heat transfer oil is reused through a circulation system, reducing energy consumption; the electric heating heat transfer oil device can precisely control the temperature of the heat transfer oil, ensuring stable heating temperature inside the reactor and improving the quality stability of liquid sodium silicate products; the circulating heat transfer oil can make the heat distribution more uniform, further improving the dissolution efficiency, and the overflow return pipe realizes closed-loop circulation, reducing heat transfer oil loss.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention features an independent heat-conducting oil cavity formed by the outer shell and inner shell of the vessel. Combined with a hollow grate structure communicating with the cavity, this significantly expands the heat exchange contact area, allowing heat from the heat-conducting oil to be transferred to the material from multiple dimensions via the inner wall of the vessel and the hollow grate, thus significantly improving heat utilization efficiency. The stirring component works synergistically with this heating structure to avoid uneven heating of the material in certain areas, accelerate the dissolution rate of sodium silicate, shorten the production cycle, and increase the output per unit time.

[0021] In this invention, the drive motor in the stirring assembly drives the stirring frame to rotate via a drive rod. The matching design of the clearance between the stirring frame and the hollow grate eliminates the risk of mechanical interference during operation, ensuring long-term stable operation of the equipment. The contact structure between the bottom scraper and the bottom of the inner shell of the vessel can remove deposited materials in real time, preventing raw materials from clumping or overheating due to retention. This not only improves the raw material conversion rate but also reduces dead corners in the bottom cleaning, lowers the frequency and cost of equipment maintenance, and extends the service life of the equipment.

[0022] This invention comprises a heat transfer oil storage tank, a pumping assembly, and an electrically heated heat transfer oil device, forming a complete heating system. The hot oil delivery pipe and the overflow return pipe create a closed-loop circulation, allowing for the reuse of the heat transfer oil and reducing energy consumption and operating costs. The electric heating method enables precise control of the heat transfer oil temperature, ensuring a stable reaction environment within the reactor and improving the uniformity of the liquid sodium silicate product quality. The circulating heat transfer oil ensures a more even heat distribution within the cavity and the hollow grate, preventing material deterioration caused by localized overheating and further guaranteeing production safety and product qualification rate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the explosive structure of this utility model; Figure 2 This is a schematic diagram of the front axonometric structure of this utility model; Figure 3 This is a front-section axial side view of the present invention.

[0025] In the diagram: 1. Support base; 2. Outer shell of the vessel; 3. Vessel cover; 4. Inner shell of the vessel; 5. Hollow grate; 6. Drive motor; 7. Drive rod; 8. Stirring rack; 9. Bottom scraper; 10. Material connection port; 11. Discharge pipe; 12. Centralized box; 13. One-way control valve; 14. Side plate; 15. Thermal oil storage tank; 16. Pumping assembly; 17. Electric heating thermal oil device; 18. Hot oil conveying pipe; 19. Overflow return pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-3 This utility model provides a technical solution: A dissolving vessel for the production of liquid sodium silicate includes a support base 1, which is welded from Q235 steel to ensure the stability of the equipment during operation. The upper side of the support base 1 is fixedly connected to the outer shell 2 of the vessel body by bolts. The outer shell 2 is made of carbon steel with a thickness of 8-12mm. The inner shell 4 of the vessel body is made of 304 stainless steel with a thickness of 5-8mm. The heat transfer oil cavity formed between the inner shell 4 and the outer shell 2 has a width of 10-15cm. The upper and lower ends of the cavity are sealed with high-temperature resistant sealing strips to prevent heat transfer oil leakage.

[0028] Several hollow grates 5 are welded vertically at equal intervals on the inner wall of the inner shell 4 of the vessel. The hollow grates 5 have a flat rectangular structure, are hollow inside and communicate with the heat transfer oil cavity. The spacing between adjacent hollow grates 5 is 15-20cm to ensure that the material can flow between the grates. The vessel cover 3 is connected to the upper side of the outer shell 2 of the vessel through a flange. High temperature resistant gaskets are set between the flanges to ensure the sealing of the vessel.

[0029] The stirring assembly includes a drive motor 6, which is a variable frequency motor with a power of 2.2-5.5kW. The drive motor 6 is fixed to the upper center of the vessel cover 3 by a motor bracket. The output shaft of the drive motor 6 is connected to the drive rod 7 by a coupling. The drive rod 7 is a stainless steel rod with a diameter of 50-80mm and its length is adapted to the height of the inner shell 4 of the vessel.

[0030] Six sets of stirring racks 8 are welded at equal intervals along the axial direction on the outer side of the drive rod 7. The margin between the edge of the stirring rack 8 and the cavity grate 5 is 5-10mm to avoid collision between the two during operation. A bottom scraper 9 is welded to the bottom of the drive rod 7, and a wear-resistant rubber scraper is installed at its end. The scraper is in close contact with the bottom inner side of the inner shell 4 of the vessel. The contact pressure can be controlled by adjusting the tightness of the scraper.

[0031] Five material connection ports 10 are evenly arranged along the circumference on the upper side of the vessel cover 3. The material connection ports 10 are flange interfaces with a diameter of 50-100mm. Valves are installed at the interfaces, which can be connected to solid raw material conveying pipes, liquid auxiliary material conveying pipes and clean water pipes respectively to meet the addition requirements of different materials. The sealing surface of the flange interface adopts a tongue and groove structure, and is equipped with acid and alkali resistant gaskets to ensure no leakage during the feeding process.

[0032] Four discharge pipes 11 are arranged circumferentially on the lower side of the outer shell 2 of the vessel body. The discharge pipes 11 are stainless steel pipes with a diameter of 80-120mm and are connected to the bottom of the inner shell 4 of the vessel body. The connection between the discharge pipes 11 and the outer shell 2 of the vessel body is sealed by welding. The other end of the discharge pipes 11 converges and is welded to the collection box 12. The collection box 12 is a funnel-shaped structure made of stainless steel with a volume of 50-100L. The lower side of the collection box is connected to a one-way control valve 13 through a flange. The one-way control valve 13 is a pneumatic ball valve with a diameter of DN80-DN125. The valve can be remotely controlled by the control system to realize the automated operation of discharge.

[0033] In the heat transfer oil conveying section, the side plate 14 is a carbon steel plate with a thickness of 10-15mm, which is fixed to one side of the support base 1 by bolts. The heat transfer oil storage tank 15 is placed below the side plate 14. The storage tank has a volume of 500-1000L, is made of carbon steel and is treated with anti-corrosion. The top of the tank is equipped with an oil filling port and a level gauge.

[0034] The upper side of the heat transfer oil storage tank 15 is connected to the pumping assembly 16 via a pipe. The pumping assembly 16 is selected with a flow rate of 10-20 m³ / h. 3 A gear pump with a capacity of / h provides power for the circulation of heat transfer oil. The outlet of the pumping component 16 is connected to the electric heating heat transfer oil device 17 through a pipeline. The electric heating heat transfer oil device 17 is fixed on the upper side of the side plate 14 and adopts the heating method of electric heating tube with a heating power of 15-30kW. It is equipped with a temperature sensor inside to monitor the temperature of the heat transfer oil in real time.

[0035] The outlet of the electric heating heat transfer oil device 17 is connected to the hot oil delivery pipe 18, which is an insulated steel pipe with a diameter of 50-80mm. Its other end is connected to the bottom of the heat transfer oil cavity. The top of the heat transfer oil cavity is connected to the overflow return pipe 19, which is also an insulated steel pipe with a diameter of 65-100mm. Its other end is connected to the upper part of the heat transfer oil storage tank 15, forming a complete heat transfer oil circulation loop.

[0036] The workflow of this embodiment is as follows: During the production of liquid sodium silicate, raw materials are added to the inner shell 4 of the reactor through the material connection port 10. The heat transfer oil conveying unit is started, and the heat transfer oil enters the heat transfer oil cavity and the hollow grate 5 after being heated to heat the raw materials. At the same time, the stirring assembly is started, and the stirring rack 8 and the bottom scraper rack 9 stir and scrape the material to accelerate the dissolution of the raw materials. After dissolution is completed, the one-way control valve 13 is opened, and the liquid sodium silicate is discharged through the discharge pipe 11 and the collection box 12.

[0037] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dissolving vessel for the production of liquid sodium silicate, comprising a support base (1), wherein a heat-conducting oil conveying section is provided on one side of the support base (1), characterized in that, The upper side of the support base (1) is provided with a vessel shell (2), the upper side of the vessel shell (2) is provided with a vessel cover (3), the inner side of the vessel shell (2) is provided with a vessel inner shell (4), a heat-conducting oil cavity is provided between the vessel inner shell (4) and the vessel shell (2), a number of hollow grates (5) are provided on the inner wall of the vessel inner shell (4), the hollow grates (5) are connected to the heat-conducting oil cavity, and a stirring assembly is provided on one side of the vessel cover (3).

2. The dissolving vessel for producing liquid sodium silicate according to claim 1, characterized in that, The stirring assembly includes a drive motor (6), which is located on the upper side of the vessel cover (3). The output shaft end of the drive motor (6) is provided with a drive rod (7). Several stirring racks (8) are provided on the outer side of the drive rod (7). The clearance of the stirring racks (8) matches the clearance of the cavity grate (5). The bottom end of the drive rod (7) is provided with a bottom scraper (9). One side of the bottom scraper (9) abuts against the inner bottom of the inner shell (4) of the vessel.

3. A dissolving vessel for the production of liquid sodium silicate according to claim 1, characterized in that, The upper side of the vessel cover (3) is provided with several material connection ports (10).

4. A dissolving vessel for the production of liquid sodium silicate according to claim 1, characterized in that, The lower side of the outer shell (2) of the vessel body is provided with several discharge pipes (11), the discharge pipes (11) are connected to the inner shell (4) of the vessel body, and a central box (12) is provided at one end of the discharge pipe (11), and a one-way control valve (13) is provided on the lower side of the central box (12).

5. A dissolving vessel for the production of liquid sodium silicate according to claim 1, characterized in that, The heat transfer oil conveying unit includes a side plate (14), which is disposed on one side of the support base (1). A heat transfer oil storage tank (15) is disposed below the side plate (14). A pumping assembly (16) is disposed on the upper side of the heat transfer oil storage tank (15). An electric heating heat transfer oil device (17) is disposed on one side of the pumping assembly (16). The electric heating heat transfer oil device (17) is disposed on the upper side of the side plate (14). A hot oil conveying pipe (18) is disposed on one side of the electric heating heat transfer oil device (17). The hot oil conveying pipe (18) is configured to communicate with the heat transfer oil cavity. An overflow return pipe (19) is disposed at the top of the heat transfer oil cavity. One end of the overflow return pipe (19) is connected to one side of the heat transfer oil storage tank (15).

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