A special storage tank for atmp

Abstract

The utility model discloses a kind of ATMP special storage tanks, the storage tank includes tank body, mounting flange, drying device, breather valve, control device and temperature and humidity probe head;Tank body is sealed cylindrical structure, inner wall is equipped with PTFE anticorrosive coating;Mounting flange is fixed in tank body top inner side, drying device is connected with mounting flange sealing by self connecting flange;Breather valve is installed in tank body top side wall;Probe head is equipped with drying device probe jack and extends into tank body, control device is fixed in tank body outer side wall, electrically connected probe head, drying device centrifugal fan and breather valve form closed-loop control, the utility model advantage lies in: drying device sealed integrated reliable, closed-loop control humidity control temperature accurate, acid-resistant and good impurity effect, drying agent is replaced conveniently, can stably satisfy solid ATMP storage demand.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical solid material storage equipment, specifically an ATMP dedicated storage tank. Background Technology

[0002] Solid ATMP is typically a white crystalline powder, odorless and readily soluble in water. Its storage presents three main challenges: First, there is a high risk of moisture absorption and clumping. Solid ATMP is sensitive to humidity and requires a long-term storage environment with a relative humidity of ≤25%RH. If ordinary storage tanks lack dedicated drying equipment or have poorly sealed connections, external humid air can easily seep in, causing the ATMP surface to form an adhesive layer and clump together, affecting subsequent dissolution and usage. Second, there is a risk of high-temperature decomposition. Solid ATMP is prone to slight decomposition at temperatures exceeding 60℃, producing phosphorous acid impurities, leading to a decrease in the content of effective components. Existing storage tanks often lack precise temperature control mechanisms, and environmental temperature fluctuations can easily trigger decomposition. Third, there is the risk of acidic corrosion and impurity contamination. After absorbing moisture, solid ATMP releases trace amounts of acidic water vapor, causing corrosion to the inner walls of ordinary metal storage tanks (such as carbon steel). Detached metal fragments can contaminate the ATMP. Furthermore, traditional tank breather valves lack dustproof design, allowing external dust to easily enter the tank, further affecting the purity of the material.

[0003] Existing chemical storage equipment cannot meet the specific requirements of solid-state ATMP: On the one hand, drying and storage equipment for solid chemicals (such as patent CN108106363A "Chemical Solid Material Blowering and Stirring Drying Tank") adopts a heating drying (80-150℃) and mechanical stirring structure. The heating temperature far exceeds the ATMP stability threshold, and the stirring components are prone to generating metal debris, which directly leads to ATMP decomposition and contamination. On the other hand, most existing storage tanks are general-purpose structures without integrated dedicated drying devices. If external drying devices are added later, poor flange compatibility and rudimentary sealing structures often lead to the infiltration of humid air. Furthermore, the lack of a "detection-control-dehumidification" linkage mechanism makes it impossible to adjust the internal environment of the tank in real time, making it difficult to maintain the stable storage conditions required by ATMP.

[0004] Therefore, it is necessary to design a dedicated ATMP storage tank that integrates a special drying device with the storage tank, and has closed-loop humidity control and corrosion protection, in order to solve the compatibility defects of existing equipment. Utility Model Content

[0005] (a) Technical problems to be solved This utility model aims to solve the technical defects of existing storage tanks that cannot be adapted to solid-state ATMP storage, specifically including: Achieve a secure and sealed connection between the drying device and the storage tank to prevent humid air from seeping in or the drying device from falling off due to vibration; A closed-loop system of "detection-control-dehumidification" is constructed to monitor and adjust the humidity and temperature inside the tank in real time, avoiding the risks of ATMP absorbing moisture and clumping and high-temperature decomposition. The pre-designed dedicated probe mounting structure eliminates the need for additional openings in the tank wall, ensuring both the tank's sealing performance and the accuracy of the detection data. The corrosion-resistant design of the inner wall of the storage tank and key components is strengthened to resist ATMP acidic water vapor corrosion and prevent metal debris and external dust contamination. The maintenance process for drying equipment is simplified, and desiccant can be replaced without emptying the storage tank, reducing operational complexity and the risk of material contamination.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides a dedicated storage tank for ATMP, the specific technical solution of which is as follows: The ATMP-specific storage tank includes a tank body, mounting flange, drying device, breather valve, control device, humidity sensor, and temperature sensor. The tank body is a sealed cylindrical structure with an open top. The inner wall of the tank is coated with a PTFE anti-corrosion coating to support solid ATMP and resist acid corrosion. The mounting flange is an annular structure, fixedly located on the inner side of the top of the tank body. Its inner diameter matches the outer diameter of the connecting flange at the bottom of the drying device, serving as the connection carrier between the drying device and the storage tank. The drying device is sealed to the mounting flange via its own bottom connecting flange, and a fluororubber gasket is provided at the connection point to ensure the connection is secure. The system is designed to prevent air leakage. A breather valve is fixedly installed on the top side wall of the tank, communicating with the inside of the tank to balance internal pressure and prevent external dust from entering. Humidity and temperature sensors are installed in the probe ports of the drying unit, with the probe ends of both sensors extending into the tank through the probe channel of the drying unit to collect real-time humidity and temperature data. A control device is fixed to the outer wall of the tank and electrically connected to the humidity sensor, temperature sensor, centrifugal fan of the drying unit, and breather valve, forming a closed-loop control mechanism that can adjust dehumidification and pressure balance according to internal environmental parameters.

[0007] The drying device includes a connecting flange, a main body, an exhaust device, a drawer-type desiccant box, a probe socket, and a probe channel. The main body has a square column structure, and the connecting flange is fixedly connected to the bottom of the main body, serving as the connection end between the drying device and the storage tank. The exhaust device is installed on the upper part of the main body and includes an outer shell, a centrifugal fan, and a duct. The centrifugal fan is located inside the outer shell, and its air inlet is connected to the top outlet of the duct. The air outlet extends out to the upper part of the outer shell to drive the air circulation inside the tank. The duct is inverted conical in shape, with its bottom opening facing upwards towards the drawer-type desiccant box, allowing it to collect air dehumidified by the desiccant. The probe channel is located on the main body. On one side of the main body, the probe insertion hole is obliquely set on the outer shell of the exhaust device, and the probe insertion hole is axially aligned with the outer shell and the probe channel, providing an installation channel for the probe head; the drawer-type desiccant box is located inside the main body, with a handle at the front end for easy pull-out operation, and air holes on the other sides for air circulation. The top is equipped with a cover plate, which is hinged or pulled out to the desiccant box, allowing it to be opened to add or replace the desiccant; the desiccant box contains desiccant, and air holes are distributed on the side walls of the main body, with the air holes on the side walls of the main body corresponding to the air holes in the desiccant box, ensuring that air inside the can enter the desiccant box and fully contact the desiccant.

[0008] Preferably, the probe socket is provided with a sealing structure between the humidity probe and the temperature probe to prevent gas inside the tank from leaking through the probe installation gap; the signal cables of the humidity probe and the temperature probe extend to the outside of the tank through the cable tray of the drying device, and the cable tray is equipped with a PTFE tube to protect the cables from acidic water vapor corrosion.

[0009] Preferably, it also includes a sealing element that matches the cover plate. When the cover plate is connected to the desiccant box, the sealing element is located on the mating surface of the two to ensure the desiccant box is sealed. Sealing structures are provided at the connection between the main body and the connecting flange, and at the connection between the outer shell of the exhaust device and the top of the main body, to further improve the overall sealing performance of the drying device.

[0010] (III) Beneficial Effects The beneficial effects of this utility model are reflected in the following aspects, all of which are designed to address the pain points of solid-state ATMP storage: Closed-loop humidity control is precise and stable: The humidity and temperature sensors collect parameters inside the tank in real time. The control device links the centrifugal fan and breathing valve of the drying device to dynamically adjust the dehumidification intensity and the pressure inside the tank, keeping the humidity inside the tank stable below 25%RH and the temperature below 60℃, completely avoiding the risks of ATMP moisture absorption and clumping and high-temperature decomposition. The drying unit is reliably sealed and integrated: The drying unit is sealed to the storage tank through a special mounting flange and is equipped with fluororubber gaskets. The leakage rate is ≤0.01MPa・L / s, which solves the problems of loose connection and sealing failure of traditional external drying units, and at the same time prevents humid air from seeping in. Highly adaptable to detection and protection: The pre-set probe socket and channel provide dedicated installation space for the probe head, eliminating the need for additional openings in the tank wall. This ensures the tank's airtightness while allowing the probe to directly contact the air inside the tank, achieving humidity detection accuracy of ±3%RH and temperature detection accuracy of ±0.5℃. The PTFE coating on the inner wall of the tank and the seals (made of fluororubber) in various parts can resist acidic water vapor corrosion. The dustproof design of the breather valve and the sealing structure of the desiccant box can prevent external impurities from entering, improving the ATMP purity protection rate by more than 90%. Convenient and efficient maintenance: The drying device uses a drawer-type desiccant box. When replacing the desiccant, you only need to pull out the box and open the cover. There is no need to empty the storage tank. The maintenance time for a single maintenance is reduced to less than 5 minutes, which is 6 times more efficient than the maintenance of traditional storage tanks. Wide structural adaptability: The main body of the drying device is square column-shaped, compact and lightweight, and can be adapted to small and medium-sized storage tanks of different volumes (5-20m³). The installation flange specifications can be adjusted according to the top size of the storage tank, making it flexible for various application scenarios. Attached Figure Description

[0011] To better understand the structure and component assembly relationships of this storage tank, please refer to the following attached figures ( Figures 1-4 ): Figure 1 : Schematic diagram of ATMP dedicated storage tank, used to show the overall layout of the tank, including the tank body (sealed cylindrical structure, supporting solid ATMP), mounting flange (ring structure, located on the inner side of the top of the tank body, connecting to the drying device), drying device (built-in structure, realizing dehumidification inside the tank), and breather valve (located on the side wall of the top of the tank, balancing pressure and preventing dust). Figure 2 : A 3D view of the drying unit, used to show the overall structure of the drying unit, including the connecting flange (adapted to the installation flange of the storage tank), the main body (square column-shaped load-bearing frame), the exhaust system (including the outer shell, centrifugal fan and air collection pipe, driving airflow circulation), the probe socket (for installing the probe), the drawer-type desiccant box (for holding the desiccant), the handle (for pulling out the desiccant box), the probe channel (for the probe to extend into the tank), and the air vent (to allow air circulation). Figure 3 : Front view of the drying device, used to show the connection relationship of the components on the front of the drying device, including the main body, drawer-type desiccant box, air vents, centrifugal fan (located inside the exhaust device, the core power component), and air collection duct (inverted cone structure, to gather dry air); Figure 4 : Drawer-type desiccant box structure diagram, used to show the detailed design of the desiccant box, including the drawer-type desiccant box, handle, air vent, and cover (hinged or pull-out type, sealed desiccant box).

[0012] Caption 1-Connecting flange (the connecting component between the drying unit and the storage tank mounting flange, adapted to the mounting flange size); 2-Exhaust device (active airflow drive component of the drying device, including housing, centrifugal fan and air collection duct); 3-Probe socket (the mounting interface for the probe head, angled and located on the exhaust device housing); 4-Main body (square column-shaped support frame of the drying unit, used to install various components); 5-Drawer-type desiccant box (a component inside the drying device that holds the desiccant, which can be pulled out). 6-Handle (located at the front of the drawer-type desiccant box for easy pulling out of the desiccant box); 7-Probe channel (a channel for the probe head to enter the tank, which is axially aligned with the probe insertion hole); 8-Pores (pore structures that allow air circulation, distributed on the side walls of the main body and the surface of the drawer-type desiccant box); 9-Centrifugal fan (the core power component of the exhaust system, driving the air circulation inside the tank); 10-Air collection duct (an airflow gathering component in the exhaust device, with an inverted cone-shaped structure, connected to the air inlet of the centrifugal fan); 11-Lid (Sealing cover for drawer-type desiccant box, hinged or pull-out connection); 12-Tank body (the main storage component of the ATMP dedicated storage tank, a sealed cylindrical structure); 13- Mounting flange (located on the inside of the top of the tank, used for connecting the drying unit). 14-Drying device (core component for in-tank dehumidification, built-in installation on the top of the tank); 15 - Breathing valve (located on the top side wall of the tank to balance the pressure inside the tank and block external dust). Detailed Implementation Example 1

[0013] The following details the specific dimensions, materials, and component parameters. Figures 1-4 The diagrams and structure provide a detailed explanation of the implementation method of this ATMP dedicated storage tank, ensuring that the technical solution can be implemented and that all core components are clearly shown: (a) Selection of component size and material Tank 12: Sealed cylindrical structure, inner diameter 1200mm, height 2000mm, wall thickness 8mm, made of 316L stainless steel (basic corrosion resistance), with a 0.5mm thick PTFE anti-corrosion coating on the inner wall (resisting ATMP acidic water vapor corrosion and preventing metal ion leaching); a conical discharge port (300mm in diameter, for easy material discharge) is provided at the bottom of the tank, and a borosilicate glass observation window (300mm×200mm in size, for easy observation of the material status inside the tank) is provided in the middle of the side wall of the tank; Mounting flange 13: Annular structure, inner diameter 180mm, outer diameter 220mm, thickness 10mm, material is 316L stainless steel, fixed to the inner side of the top of tank body 12 by welding, and a 5mm deep sealing groove is opened on the flange end face (for placing fluororubber sealing gasket). Drying device 14: Connection flange 1: It is compatible with mounting flange 13. Its dimensions (inner diameter 180mm, outer diameter 220mm, thickness 10mm) and material (316L stainless steel) are the same as those of mounting flange 13. The flange end face is provided with a sealing groove. Main body 4: Square column structure, 180mm long × 180mm wide × 300mm high, made of 304 stainless steel, with 8 Φ1.5mm air holes evenly distributed on the side wall (hole spacing 15mm, 12 on each side to ensure air circulation area). Exhaust device 2: The outer shell is a cuboid structure (180mm long × 180mm wide × 120mm high, made of 304 stainless steel), and a miniature centrifugal fan 9 is installed inside (3W power, 1500r / min speed, made of 316L stainless steel to avoid acid corrosion). The air collection pipe 10 is an inverted cone shape (top outlet diameter 20mm, bottom opening diameter 80mm, height 50mm, made of 304 stainless steel). The top outlet of the air collection pipe 10 is welded and sealed to the air inlet of the centrifugal fan 9. Drawer-type desiccant box 5: Rectangular structure (160mm long × 160mm wide × 80mm high, made of PP plastic, lightweight and acid-resistant), with Φ1mm air holes 8 (hole spacing 12mm) on all sides except the front end, one-piece molded PP handle 6 (50mm long, easy to grip), top cover 11 is a pull-out structure (PP plastic, 3mm thick), 2mm thick fluororubber sealing strip is attached to the surface of the cover 11 that is in contact with the box body; the box is filled with color-changing silica gel desiccant (particle size 2-4mm, filling amount 800g, changes color after absorbing moisture for easy observation and replacement). Probe insertion hole 3 and probe channel 7: both are Φ12mm round holes. Probe channel 7 is opened at a 30° angle on one side of the main body 4 (100mm deep, to ensure that the probe extends into the tank 12). Probe insertion hole 3 is opened at a corresponding angle on the outer shell of the exhaust device 2 (through the same shaft as probe channel 7). A fluororubber O-ring (2mm wire diameter, used to seal the gap between the probe and the insertion hole) is placed inside the insertion hole. Cable tray: It is located on the side of the connecting flange 1 of the drying device 14. The tray is 8mm wide and 5mm deep, and has a built-in Φ6mm PTFE pipe (to protect the signal cable of the probe head). Breathing valve 15: Specification DN50, material 316L stainless steel, built-in PTFE dust filter (pore size 0.1μm, blocking external dust), with electric opening adjustment function (opening range 0-100%, adapting to different pressure requirements). Control device: Wall-mounted structure (dimensions 200mm×150mm×80mm), core control chip is STM32F103, equipped with LCD display (real-time display of temperature and humidity inside the tank), power supply is adapted to 220V AC, and is connected to humidity sensor, temperature sensor, centrifugal fan 9 and breathing valve 15 respectively through RVVP shielded cable; Probes: The humidity probe is model SHT30 (measurement range 0-100%RH, accuracy ±3%RH), and the temperature probe is model DS18B20 (measurement range -55-125℃, accuracy ±0.5℃). Both probes have a probe end diameter of 8mm (compatible with probe socket 3). The outer layer of the signal cable is fluoroplastic insulation (acid corrosion resistant). Sealing components: The gasket between the mounting flange 13 and the connecting flange 1 of the drying device 14 is made of fluororubber (3mm thick, temperature resistant -20-200℃); the sealing strips of the cover plate 11 and the drawer-type desiccant box 5, and the O-ring of the probe insertion hole 3 are all made of fluororubber; the connection between the main body 4 and the connecting flange 1, and the connection between the outer shell of the exhaust device 2 and the main body 4 are all sealed with fluororubber sealant.

[0014] (II) Installation and Usage Procedures Component assembly: Drying device 14 installation: Place the fluororubber gasket into the sealing groove of the mounting flange 13, align the connecting flange 1 of the drying device 14 with the mounting flange 13, and tighten evenly with 8 M16 stainless steel bolts (tightening torque 40 N·m) to ensure the connection is sealed. Probe installation: Insert the humidity probe and temperature probe into the probe socket 3 of the drying device 14 respectively, so that the probe end passes through the probe channel 7 and extends into the tank 12 (100mm deep). Tighten the fluororubber O-ring in the probe socket 3, pass the signal cable of the probe through the PTFE tube in the wiring groove, extend it to the outside of the tank 12 and connect it to the control device. Installation of other components: Connect the breather valve 15 to the top side wall of the tank 12 (200mm from the top of the tank) via a flange and connect it to the control device electrically; fix the control device to the outer side wall of the tank 12 (1500mm from the ground for easy operation).

[0015] Closed-loop control operation: Parameter settings: Set the humidity threshold (upper limit 30%RH, lower limit 25%RH) and temperature threshold (upper limit 40℃, lower limit 15℃) inside the tank via the LCD display of the control device. Automatic adjustment: When the humidity sensor detects that the humidity inside the tank is ≥30%RH or the temperature sensor detects that the temperature is ≥40℃, the control device automatically starts the centrifugal fan 9 (driving the air inside the tank to circulate and dehumidify) and adjusts the opening of the breather valve 15 to 50%-80% (to balance the pressure inside the tank and expel humid air); when the humidity is ≤25%RH and the temperature is ≤35℃, the control device shuts off the centrifugal fan 9 and adjusts the opening of the breather valve 15 to 10%-20% (to maintain a slight positive pressure inside the tank and prevent the infiltration of external humid air); if the temperature is ≥55℃ (close to the ATMP decomposition threshold), the control device triggers an audible and visual alarm to remind the staff to intervene.

[0016] Material storage and maintenance: Material filling: Open the manhole at the top of tank 12 (set off from the drying device 14), slowly pour solid ATMP into tank 12 (filling amount ≤ 80% of the volume of tank 12), close the manhole and seal it; Desiccant replacement: When the color-changing silica gel in the drawer-type desiccant box 5 changes from blue to pink, observe through the observation window of the canister 12 or the observation window of the drying device 14 (if applicable). Disconnect the power supply of the control device, hold the handle 6 of the drawer-type desiccant box 5 and pull it out. Open the cover 11, replace the silica gel, push it back into place and lock it. Then power it on again. Regular maintenance: Inspect all sealing parts (installation flange 13, probe insertion hole 3, cover plate 11) every 6 months, and replace them if the seals are aged; clean the dust filter of the breather valve 15 and the blades of the centrifugal fan 9 every year to avoid clogging or dust accumulation that may affect performance.

[0017] This embodiment achieves long-term stable storage of solid-state ATMP through the coordinated operation of various components. Actual testing shows that the humidity inside tank 12 can be stably maintained at 22%-28%RH, and the temperature at 25%-38℃. After 6 months of storage, the solid-state ATMP shows no clumping or decomposition, and the effective component content remains ≥98%, fully meeting the storage requirements for industrial-grade ATMP.

[0018] Although embodiments of the present invention have been shown and described, those skilled in the art will be able to make various changes, modifications, substitutions and alterations 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. An ATMP-specific storage tank, characterized in that: The device includes a tank, mounting flange, drying unit, breather valve, control device, humidity sensor, and temperature sensor. The tank is a sealed cylindrical structure with an open top, and the inner wall of the tank is coated with a PTFE anti-corrosion coating. The mounting flange is an annular structure, fixedly installed on the inner side of the top of the tank, and its inner diameter is adapted to the outer diameter of the connecting flange at the bottom of the drying unit. The drying unit is sealed to the mounting flange via the connecting flange, and a fluororubber gasket is provided at the connection. The breather valve is fixedly installed on the top side wall of the tank and communicates with the inside of the tank. The humidity sensor and temperature sensor are respectively installed in the probe socket of the drying unit, and the probe ends of both sensors extend into the tank through the probe channel of the drying unit. The control device is fixed to the outer wall of the tank and is electrically connected to the humidity sensor, temperature sensor, centrifugal fan of the drying unit, and breather valve to form a closed-loop control mechanism.

2. The ATMP dedicated storage tank according to claim 1, characterized in that: The drying device includes a connecting flange, a main body, an exhaust device, a drawer-type desiccant box, a probe socket, and a probe channel. The main body is square-column shaped, and the connecting flange is connected to the bottom of the main body. The exhaust device is installed on the upper part of the main body and includes a shell, a centrifugal fan, and a duct. The centrifugal fan is located inside the shell, and the air inlet of the centrifugal fan is connected to the top outlet of the duct. The air outlet of the centrifugal fan extends out of the upper part of the shell. The probe channel is located on one side of the main body, and the probe socket is obliquely set on the shell. The probe socket is axially aligned with the shell and the probe channel. The drawer-type desiccant box is located inside the main body. The front end of the drawer-type desiccant box has a handle, and the remaining surfaces of the drawer-type desiccant box have air holes. The top of the drawer-type desiccant box has a cover plate, which is hinged or pulled out of the drawer-type desiccant box.

3. The ATMP dedicated storage tank according to claim 2, characterized in that: The drawer-type desiccant box contains desiccant, and the side wall of the main body has pores distributed on it. The pores on the side wall of the main body are arranged to correspond to the pores of the drawer-type desiccant box, so that the airflow inside and outside the main body can be connected.

4. The ATMP dedicated storage tank according to claim 3, characterized in that: The air collection pipe is inverted conical in shape, with the bottom opening facing the top of the drawer-type desiccant box, and the inner wall of the air collection pipe is sealed to the edge of the air inlet of the centrifugal fan.

5. The ATMP dedicated storage tank according to claim 4, characterized in that: The probe socket is equipped with a sealing structure between the humidity probe and the temperature probe. The signal cables of the humidity probe and the temperature probe extend to the outside of the tank through the wiring groove of the drying device. The wiring groove is equipped with a PTFE tube.

6. The ATMP dedicated storage tank according to claim 5, characterized in that: It also includes a sealing element that matches the cover plate. When the cover plate is connected to the drawer-type desiccant box, the sealing element is located on the mating surface of the cover plate and the drawer-type desiccant box. A sealing structure is provided at the connection between the main body and the connecting flange, and a sealing structure is provided at the connection between the outer shell of the exhaust device and the top of the main body.

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