Hydrogel drying device for preparing sodium chlorite hydrogel

Abstract

The invention relates to the technical field of hydrogel preparation instruments, and discloses a hydrogel drying device for sodium chlorite hydrogel preparation, which comprises a box body, support legs are fixedly connected to the bottom of the box body, a box door is movably connected to the front surface of the box body, porous distributors are fixedly mounted on two sides of the interior of the box body, and the porous distributors are fixedly connected to the bottom of the box body. A porous distributor is arranged in the box body, the porous distributor and the side wall of the box body are spaced to form an air distribution cavity, air distribution holes are uniformly formed in the porous distributor, a tray supporting block is fixedly connected to the inner side of the porous distributor, and a drying tray is movably connected to the upper side of the tray supporting block. According to the sodium chlorite hydrogel drying device, the porous distributor is additionally arranged at the air outlet in the box body, and the inert gas conveying device is connected to the air inlet, so that oxidation reaction in the sodium chlorite hydrogel drying process is inhibited, and generation and release of harmful gas are reduced; and the residual gas adsorption cavity is additionally arranged at the exhaust port, harmful gas is discharged after being subjected to alkali neutralization treatment, and the safety in the drying process is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogel preparation equipment, in particular to a hydrogel drying device for preparing sodium chlorite hydrogel. Background Art

[0002] Chlorine dioxide has a strong oxidizing ability. Compared with traditional liquid chlorine, chlorine dioxide not only has a strong disinfection ability but also will not produce chlorophenols with strange smells with phenols in water, and will not react with humus to form carcinogens. It has multiple functions such as disinfection, sterilization, preservation, deodorization, preservation, and bleaching. It is a broad-spectrum, safe and efficient disinfectant, and is praised as a fourth-generation disinfectant. It is also widely used in pulp bleaching, food processing, medicine and health care and other fields. However, chlorine dioxide gas is unstable and inconvenient to transport and store. It must be prepared on-site, but the production of high concentrations of chlorine dioxide gas in a short period of time will cause harm to humans or animals. Therefore, the characteristic of chlorite to decompose under ultraviolet light to produce chlorine dioxide gas is used to prepare sodium chlorite gel, which can well achieve the production of chlorine dioxide gas while achieving long-term slow release of chlorine dioxide in space.

[0003] In the preparation process of sodium chlorite hydrogel, different from other hydrogel drying processes, the drying of sodium chlorite hydrogel needs to overcome its strong oxidizing property. The uneven temperature of the traditional drying box leads to excessive local temperature, which will cause the sodium chlorite hydrogel to decompose at high temperature. At the same time, the high-temperature decomposition of sodium chlorite hydrogel will release harmful gases. The traditional drying device has a simple structure and cannot effectively inhibit the oxidative decomposition of sodium chlorite. In the drying process of the hydrogel, it is difficult for the traditional drying device to adopt different drying modes for its early and mid-to-late precursor solutions and sol states. It is necessary to manually monitor the gelation state of the hydrogel to adjust the drying mode at any time, and the degree of automation is poor and the efficiency is low. Summary of the invention

[0004] The invention aims at the shortcomings of the existing sodium chlorite hydrogel drying device proposed in the background technology during use.

[0005] The present invention provides the following technical solution: a hydrogel drying device for preparing sodium chlorite hydrogel, comprising a box body, the bottom of the box body is fixedly connected with a support foot, the front of the box body is movably connected with a box door, porous distributors are fixedly installed on both sides of the box body, the porous distributors are spaced apart from the side walls of the box body to form an air distribution cavity, the porous distributors are evenly provided with air distribution holes, the inner side of the porous distributor is fixedly connected with a tray support block, the upper side of the tray support block is movably connected with a drying tray, the middle of the drying tray is provided with a reflux port, and the drying tray is placed on the drying tray. A mold plate is provided, and a reflux temperature control chamber is fixedly provided at the bottom of the box body, a residual gas adsorption chamber is fixedly installed in the middle of the reflux temperature control chamber, a reflux port is opened in the middle of the top of the residual gas adsorption chamber and is connected with the box body, a high-humidity gas outlet is fixedly connected to the bottom of the residual gas adsorption chamber, circulating air pumps are respectively installed on both sides of the residual gas adsorption chamber inside the reflux temperature control chamber, a heating plate is fixedly installed on the outside of the circulating air pump, an air inlet is opened at the bottom of the reflux temperature control chamber near the residual gas adsorption chamber, and an air cavity air inlet connected with the reflux temperature control chamber is opened at the bottom of the air distribution cavity.

[0006] Preferably, a movable air pipe is movably installed at the air inlet, the front and rear sides of the residual air adsorption chamber are provided with channels connecting to the reflux temperature control chambers on both sides, and an inverted "T"-shaped control block is movably provided at the channel, a control block spring is fixedly installed at the bottom of the inverted "T"-shaped control block, both ends of the inverted "T"-shaped control block are respectively fixedly connected to the movable air pipes at the air inlets on both sides, a magnetic adsorption strip is fixedly installed on the top surface of the channel, a magnetic block attracted to the magnetic adsorption strip is provided on the upper surface of the cross bar of the inverted "T"-shaped control block, circulating air outlets are evenly opened at the bottom of both sides of the residual air adsorption chamber, a support spring is fixedly installed on the top of the tray support block, a support rail is fixedly installed on the top of the support spring, the drying tray is movably placed on the support rail, and connecting pillars are fixedly connected at both ends of the reflux port.

[0007] Preferably, a grid plate is fixedly installed in the middle of the residual gas adsorption chamber, and the upper side of the grid plate is filled with coconut shell activated carbon and alkaline neutralizer.

[0008] Preferably, the high-humidity gas outlet extends to the lower side of the reflux temperature control chamber, and an exhaust gas pipe discharge interface is provided at the rear opening, and an inert gas delivery device can be connected to the air inlet.

[0009] Preferably, the active air tube is in an "L" shape, and both ends of the "L" are openings.

[0010] Preferably, the inverted "T"-shaped control block is composed of a horizontal rod and a vertical rod fixedly connected, and the top end of the inverted "T"-shaped control block extends into the box body through a reflux port.

[0011] Preferably, when the inverted "T"-shaped control block moves up to the point where its cross bar is close to the upper surface of the reflux temperature control chamber, the movable air pipe is pulled up by the inverted "T"-shaped control block to the bottom opening facing the circulating air outlet. At this time, the bottom surface of the movable air pipe closes the connection between the air inlet and the outside world.

[0012] Preferably, the connecting pillars on the drying trays between two adjacent layers are in contact and support each other, and the bottom of the bottommost connecting pillar is in contact with the top surface of the inverted "T"-shaped control block.

[0013] Preferably, the circulating air pump and the heating plate are provided with two dehumidification modes of low temperature and high wind speed and constant medium temperature and low wind speed through an embedded controller or an industrial PLC, a temperature sensor is provided in the box, and a switching device is provided at the magnetic adsorption strip.

[0014] The present invention has the following beneficial effects: 1. The present invention suppresses the oxidation reaction of sodium chlorite hydrogel during drying and reduces the generation and release of harmful gases by installing a porous distributor at the air outlet of the box and connecting an inert gas delivery device at the air inlet; and ensures the safety of the drying process by installing a residual gas adsorption chamber at the discharge port and performing alkali neutralization treatment on the harmful gases before discharge.

[0015] 2. The present invention installs a porous distributor at the air outlet in the box, and uses the air distribution holes evenly arranged on the porous distributor to ensure that the airflow evenly covers the surface of the hydrogel to be dried, thereby avoiding local overheating that causes sodium chlorite decomposition or hydrogel shrinkage. At the same time, an inert gas delivery device is connected to the air inlet, so that the box is in an inert gas environment such as nitrogen or argon, thereby further inhibiting the oxidation reaction of the sodium chlorite hydrogel during the drying process and reducing the generation and release of harmful gases.

[0016] 3. The present invention adds a residual gas adsorption chamber to the discharge port and fills the upper side of the grid with coconut shell activated carbon and alkaline neutralizer. The harmful gases such as sulfur dioxide generated by high temperature during the drying process of sodium chlorite hydrogel are treated with alkali neutralization before being discharged, thereby ensuring the safety of the drying process.

[0017] 4. The present invention is provided with two dehumidification modes of low temperature and high wind speed and constant medium temperature and low wind speed through an embedded controller or an industrial PLC. The weight change caused by different water contents in the early and middle and late stages of drying is utilized to control the device to automatically switch the dehumidification mode and the air flow circulation mode at the same time, so that the drying box is in a low temperature and high wind speed state under the initial high humidity state, and the circulated high water vapor airflow is discharged outward through the high humidity outlet, thereby ensuring the rapid drainage effect in the early stage of drying, and saving energy and cost while ensuring the dehumidification efficiency in the late stage of drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-section structure of the residual gas adsorption chamber of the present invention; Figure 3 For the present invention Figure 2 A partial enlarged schematic diagram of the structure at point A in the middle.

[0019] Figure 4 This is a schematic cross-sectional view of the drying tray structure of the present invention; Figure 5 It is a schematic diagram of the cross-section structure of the inverted "T"-shaped control block of the present invention; Figure 6 For the present invention Figure 5 A partial enlarged schematic diagram of the structure at point B in the middle.

[0020] In the figure: 1. box body; 101. support foot; 102. box door; 2. porous distributor; 201. air distribution cavity; 202. air inlet of the cavity; 203. air distribution hole; 204. tray support block; 205. support spring; 206. support rail; 3. drying tray; 301. reflux port; 302. connecting pillar; 4. mold plate; 5. residual gas adsorption cavity; 501. grid plate; 502. circulating gas outlet; 503. high humidity gas outlet; 6. reflux temperature control cavity; 601. circulating air pump; 602. heating plate; 7. air inlet; 701. movable air pipe; 702. inverted "T" shaped control block; 703. control block spring; 704. magnetic adsorption strip. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-3A hydrogel drying device for preparing sodium chlorite hydrogel comprises a box body 1, a support leg 101 is fixedly connected to the bottom of the box body 1, a box door 102 is movably connected to the front of the box body 1, porous distributors 2 are fixedly installed on both sides of the box body 1, the porous distributor 2 is spaced apart from the side wall of the box body 1 to form an air distribution cavity 201, and air distribution holes 203 are evenly opened on the porous distributor 2, a tray support block 204 is fixedly connected to the inner side of the porous distributor 2, a drying tray 3 is movably connected to the upper side of the tray support block 204, a reflux port 301 is opened in the middle of the drying tray 3, a mold plate 4 is placed on the drying tray 3, and the air distribution cavity The airflow in 201 flows out evenly from the air distribution holes 203 to cover the surface of the hydrogel in the mold tray 4, ensuring that the temperature of the sodium chlorite hydrogel is uniform during the drying process, avoiding local overheating that causes sodium chlorite decomposition or hydrogel shrinkage. A reflux temperature control chamber 6 is fixedly installed at the bottom of the box 1, and a residual air adsorption chamber 5 is fixedly installed in the middle of the reflux temperature control chamber 6. A reflux port 301 is opened in the middle of the top of the residual air adsorption chamber 5 and is connected to the box 1, so that the airflow blown into the box 1 flows inward in a direction parallel to the drying tray 3, and then flows downward from the reflux port 301 in the middle of the drying tray 3, forming an airflow circulation, avoiding the problem of local overheating. A grid plate 501 is fixedly installed in the middle of the residual gas adsorption chamber 5, and the upper side of the grid plate 501 is filled with coconut shell activated carbon and alkaline neutralizer. The harmful gases such as sulfur dioxide generated by the high temperature in the drying process of sodium chlorite hydrogel are discharged after alkali neutralization treatment. A high humidity outlet 503 is fixedly connected to the bottom of the residual gas adsorption chamber 5, and the high humidity outlet 503 extends to the lower side of the reflux temperature control chamber 6, and an exhaust pipe discharge interface is set at the rear opening. The inside of the reflux temperature control chamber 6 is located on both sides of the residual gas adsorption chamber 5. A heating plate 602 is fixedly installed on the outside of the circulating air pump 601. An air inlet 7 is provided at the bottom of 6 near the residual gas adsorption chamber 5. After the reflux temperature control chamber 6 guides the airflow to both sides through the air inlet 7, it is heated to the set temperature through the heating plate 602. An air cavity air inlet 202 connected to the reflux temperature control chamber 6 is provided at the bottom of the air distribution chamber 201. The airflow heated to the set temperature passes through the air cavity air inlet 202 into the air distribution chamber 201 and is evenly blown out. An inert gas delivery device can be connected to the air inlet 7 to make the box body 1 be in an inert gas environment such as nitrogen or argon, thereby further inhibiting the oxidation reaction during the drying process of the sodium chlorite hydrogel and reducing the generation and release of harmful gases.

[0023] See also Figure 4-6A movable air pipe 701 is movably installed at the air inlet 7, and the movable air pipe 701 is in an "L" shape, and the two ends of the "L" are openings. The front and rear sides of the residual gas adsorption chamber 5 are provided with channels connecting the reflux temperature control chambers 6 on both sides, and an inverted "T"-shaped control block 702 is movably arranged at the channel. The inverted "T"-shaped control block 702 is composed of a horizontal rod and a vertical rod fixedly connected. The top of the inverted "T"-shaped control block 702 extends into the box body 1 through the reflux port 301, and a control block spring 703 is fixedly installed at the bottom of the inverted "T"-shaped control block 702. The two ends are respectively fixedly connected to the active air pipes 701 at the air inlets 7 on both sides, a magnetic adsorption strip 704 is fixedly installed on the top surface of the channel, and a magnetic block attracted to the magnetic adsorption strip 704 is arranged on the upper surface of the cross bar of the inverted "T"-shaped control block 702. Circulating air outlets 502 are evenly opened at the bottom of both sides of the residual air adsorption chamber 5. When the inverted "T"-shaped control block 702 moves up until its cross bar is close to the upper surface of the reflux temperature control chamber 6, the active air pipe 701 is pulled up by the inverted "T"-shaped control block 702 to the bottom opening facing the circulating air outlet 502. At this time, the bottom surface of the active air pipe 701 closes the air inlet The port 7 is connected with the outside world, a support spring 205 is fixedly installed on the top of the tray support block 204, a support rail 206 is fixedly installed on the top of the support spring 205, and the drying tray 3 is movably placed on the support rail 206. The two ends of the return port 301 are fixedly connected with connecting pillars 302. The connecting pillars 302 on the drying trays 3 between two adjacent layers contact and support each other, and the bottom of the bottommost connecting pillar 302 contacts the top surface of the inverted "T"-shaped control block 702. When the water content of the hydrogel in the mold plate 4 on the drying tray 3 is reduced to a low humidity state, multiple groups of weights on the drying trays 3 The overall lowering allows the support rail 206 to push the drying tray 3 upward, reducing the downward pressure on the drying tray 3. After the inverted "T"-shaped control block 702 moves up to the adsorption zone of the magnetic adsorption strip 704 under the elastic force of the control block spring 703, it is affected by the magnetic force of the magnetic adsorption strip 704, so that the inverted "T"-shaped control block 702 moves up until its cross bar is close to the upper surface of the reflux temperature control chamber 6. At this time, the active air pipe 701 is pulled up by the inverted "T"-shaped control block 702 to the bottom opening facing the circulating air outlet 502. At this time, the bottom surface of the active air pipe 701 closes the connection between the air inlet 7 and the outside world.

[0024] Among them, the circulating air pump 601 and the heating plate 602 are set with two dehumidification modes of low temperature and high wind speed and constant medium temperature and low wind speed through an embedded controller or an industrial PLC. A temperature sensor is provided in the box 1 to cooperate with the heating plate 602 to adjust the air flow temperature in real time in different states. A switching device is provided at the magnetic adsorption strip 704 to control the switching of the dehumidification mode.

[0025] The working principle of the method of the present invention is as follows: When in use, the prepared precursor solution is placed in the mold plate 4 and then evenly placed on the drying tray 3, and the drying tray 3 is pushed from bottom to top into the support rail 206 in the box body 1. The support spring 205 is pressed down by the gravity of the mold plate 4 and the precursor solution, so that the bottom of the connecting support 302 presses down the "T"-shaped control block 702 to compress the control block spring 703. At this time, the active air pipe 701 moves down to the side wall to close the circulating air outlet 502, and the bottom of the active air pipe 701 opens. The outlet is extended to the outside of the reflux temperature control chamber 6. At this time, the air inlet 7 is connected to the outside. The inert gas outside the air inlet 7 is heated up by the circulating air pump 601 and then introduced into the box body 1. The transverse section of the inverted "T"-shaped control block 702 does not contact the magnetic adsorption strip 704, that is, the pressure switching device is not touched, ensuring that the drying box is in a low temperature and high wind speed state when the material is in a high humidity state at the initial stage of drying. The high water vapor airflow after circulation is discharged to the outside through the high humidity outlet 503, ensuring the rapid drainage effect in the early stage of drying, and waiting for drying When the water content of the precursor solution in the drying tray 3 decreases during the gelation process and gradually evolves into a sol state, the weight of the mold tray 4 on the drying tray 3 decreases. Under the push of the tray support block 204 and the elastic force of the control block spring 703, the drying tray 3 gradually moves up until the magnetic attraction of the magnetic adsorption strip 704 is sufficient to adsorb the crossbar of the inverted "T"-shaped control block 702 so that it contacts the upper wall of the reflux temperature control chamber 6 and presses the switching device. At this time, the circulating air pump 601 and the heating plate 602 are controlled to switch to a constant medium temperature and low wind speed state. state, avoiding sudden temperature rise and preventing local overheating of residual sodium chlorite, while further drying the sol in the mold plate 4. At this time, the active air pipe 701 is pulled up by the inverted "T"-shaped control block 702 to the bottom opening facing the circulating air outlet 502, and the bottom surface of the active air pipe 701 closes the connection between the air inlet 7 and the outside world. The circulating air pump 601 guides the residual temperature airflow after adsorption in the residual gas adsorption chamber 5 to the reflux temperature control chamber 6 side for heating and utilization again, thereby ensuring the dehumidification efficiency in the later stage of drying while saving energy and cost.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogel drying device for preparing sodium chlorite hydrogel, comprising a box (1), wherein the bottom of the box (1) is fixedly connected to a support leg (101), and the front of the box (1) is movably connected to a box door (102), characterized in that: Porous distributors (2) are fixedly installed on both sides of the box body (1), the porous distributor (2) and the side wall of the box body (1) are spaced apart to form an air distribution cavity (201), the porous distributor (2) is evenly provided with air distribution holes (203), the inner side of the porous distributor (2) is fixedly connected to a tray support block (204), the upper side of the tray support block (204) is movably connected to a drying tray (3), the middle of the drying tray (3) is provided with a reflux port (301), a mold plate (4) is placed on the drying tray (3), and a reflux temperature control cavity (6) is fixedly provided at the bottom of the box body (1), the middle of the reflux temperature control cavity (6) is fixedly provided with a reflux port (301), and the mold plate (4) is placed on the drying tray (3). A residual gas adsorption chamber (5) is fixedly installed, a reflux port (301) is provided in the middle of the top of the residual gas adsorption chamber (5) and is communicated with the inside of the box body (1), a high humidity gas outlet (503) is fixedly connected to the bottom of the residual gas adsorption chamber (5), a circulating air pump (601) is respectively installed on both sides of the residual gas adsorption chamber (5) inside the reflux temperature control chamber (6), a heating plate (602) is fixedly installed on the outside of the circulating air pump (601), an air inlet (7) is provided at the bottom of the reflux temperature control chamber (6) near the residual gas adsorption chamber (5), and an air cavity air inlet (202) which is communicated with the reflux temperature control chamber (6) is provided at the bottom of the air distribution chamber (201).

2. The hydrogel drying device for preparing sodium chlorite hydrogel according to claim 1, characterized in that: A movable air pipe (701) is movably installed at the air inlet (7), and the front and rear sides of the residual air adsorption chamber (5) are both provided with channels communicating with the reflux temperature control chambers (6) on both sides, and an inverted "T"-shaped control block (702) is movably installed at the channel, and a control block spring (703) is fixedly installed at the bottom of the inverted "T"-shaped control block (702), and the two ends of the inverted "T"-shaped control block (702) are respectively fixedly connected to the movable air pipes (701) at the air inlets (7) on both sides, and a magnetic adsorption strip (704) is fixedly installed on the top surface of the channel. ), a magnetic block attracted to the magnetic adsorption strip (704) is arranged on the upper surface of the crossbar of the inverted "T"-shaped control block (702), and circulating gas outlets (502) are evenly provided at the bottom of both sides of the residual gas adsorption chamber (5), a support spring (205) is fixedly installed on the top of the tray support block (204), and a support rail (206) is fixedly installed on the top of the support spring (205), the drying tray (3) is movably placed on the support rail (206), and connecting pillars (302) are fixedly connected to both ends of the return port (301).

3. The hydrogel drying device for preparing sodium chlorite hydrogel according to claim 1, characterized in that: A grid plate (501) is fixedly installed in the middle of the residual gas adsorption chamber (5), and the upper side of the grid plate (501) is filled with coconut shell activated carbon and alkaline neutralizer.

4. The hydrogel drying device for preparing sodium chlorite hydrogel according to claim 1, characterized in that: The high-humidity gas outlet (503) extends to the lower side of the reflux temperature control chamber (6), and is provided with an exhaust gas pipe discharge interface at the rear opening. The air inlet (7) can be connected to an inert gas delivery device.

5. The hydrogel drying device for preparing sodium chlorite hydrogel according to claim 2, characterized in that: The active air tube (701) is in an "L" shape, and both ends of the "L" are openings.

6. The hydrogel drying device for preparing sodium chlorite hydrogel according to claim 2, characterized in that: The inverted "T"-shaped control block (702) is composed of a horizontal rod and a vertical rod that are fixedly connected, and the top end of the inverted "T"-shaped control block (702) extends into the box body (1) through the return port (301).

7. The hydrogel drying device for preparing sodium chlorite hydrogel according to claim 2, characterized in that: When the inverted "T"-shaped control block (702) moves upward until its crossbar is close to the upper surface of the reflux temperature control chamber (6), the movable air pipe (701) is pulled upward by the inverted "T"-shaped control block (702) until the bottom opening faces the circulating air outlet (502). At this time, the bottom surface of the movable air pipe (701) closes the connection between the air inlet (7) and the outside.

8. The hydrogel drying device for preparing sodium chlorite hydrogel according to claim 2, characterized in that: The connecting pillars (302) on the drying trays (3) between two adjacent layers are in contact with each other for support, and the bottom of the bottommost connecting pillar (302) is in contact with the top surface of the inverted "T"-shaped control block (702).

9. The hydrogel drying device for preparing sodium chlorite hydrogel according to claim 2, characterized in that: The circulating air pump (601) and the heating plate (602) are configured with two dehumidification modes, namely, low temperature and high wind speed, and constant medium temperature and low wind speed, through an embedded controller or an industrial PLC. A temperature sensor is provided in the box (1), and a switching device is provided at the magnetic adsorption strip (704).

Images