CN112808171A

CN112808171A - Pump valve-free corrosive liquid feeding system and process

Info

Publication number: CN112808171A
Application number: CN202011624640.1A
Authority: CN
Inventors: 邓会秋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-05-18
Anticipated expiration: 2040-12-30
Also published as: CN112808171B

Abstract

The invention provides a feeding system and a feeding process for corrosive liquid without a pump valve. The system comprises a feeding device, a batching device, a communication device and a control device with a motion control module, wherein the feeding device comprises a first material tank, a second material tank and a weighing part capable of obtaining the total weight difference value of the two material tanks. The batching device comprises a liquid level tank, a discharge pipe, a throttling element and a lower tank, wherein the liquid level tank comprises an overflow port with a constant flow function; the throttling element is positioned above or below the bottom plate of the liquid level tank and can adjust the flow of materials entering the discharge pipe; the discharge pipe is positioned below the liquid level tank and can convey inflow materials to target equipment; the lower tank is positioned below the liquid level tank and has a material recovery function; the communicating device is composed of a material conveying pipe and a recovery pipe and communicates the batching device with the feeding device. The invention adopts a pump-free valve structure, reduces the corrosion of corrosive liquid, has high feeding precision and low failure rate, and has uniform and adjustable flow.

Description

Pump valve-free corrosive liquid feeding system and process

Technical Field

The invention relates to the technical field of liquid feeding equipment, in particular to a feeding system and a feeding process of corrosive liquid without a pump valve.

Background

For the feeding method of strong corrosive liquid medium, such as sulfuric acid and sodium hydroxide solution, the prior art generally adopts a pump valve structure, and mainly comprises a low-level tank feeding method and a high-level tank feeding method.

FIG. 1 shows a schematic diagram of the apparatus of the low-level tank addition method. As shown in figure 1, the low-level tank feeding method adopts a centrifugal pump, a peristaltic pump, a diaphragm pump or a plunger pump and the like for direct feeding. The feeding amount is determined by the running time of the pump, which inevitably has the following technical problems which are puzzled in the industry for a long time:

(1) the failure rate is high. The pump head, the sealing element and the valve are easy to damage under the corrosion action of strong acid and strong alkali and the scouring and abrasion action of liquid flow running at high speed; the pump valve is generally designed to be used and prepared, the cost is high, and the maintenance workload is large; in addition, strong acid and alkali inevitably leak in the maintenance process, and the environment is polluted. In small flow rate feeding occasions such as laboratories, generally only peristaltic pumps can be used, and the hoses need to be replaced within about 10 hours due to breakage caused by abrasion.

(2) The accuracy of the added amount is low. The actual feeding amount is influenced by the fluctuation of the discharge capacity caused by the internal leakage of the pump, the cavitation erosion and the like, and a large accumulated error exists. Along with the more and more high requirement of the control that becomes more and more meticulous of production, need one kind can be to the device that strong corrosive liquid is accurate reinforced and the fault rate is low.

FIG. 2 shows a schematic diagram of the apparatus of the high-level tank addition process. As shown in figure 2, the high-level tank addition method adopts a self-flow mode for addition, and the addition amount is controlled by adjusting the opening time of a valve. Because the liquid level in the high-level tank continuously drops, the self-flow rate is continuously reduced, the flow fluctuation in the process is too large, the feeding is not uniform, and the reaction process is seriously influenced. In addition, the existence of the valve still causes high failure rate and short service life of strong corrosive liquid medium charging equipment.

Disclosure of Invention

The present invention aims to address at least one of the above-mentioned deficiencies of the prior art. For example, it is an object of the present invention to provide a dosing system and process that does not use pumps and valves and that is suitable for corrosive liquids, especially strongly corrosive liquids such as sulfuric acid. For another example, another object of the present invention is to solve the problems of low and uneven feeding accuracy and high equipment failure rate in the prior art.

In order to achieve the above object, an aspect of the present invention provides a feeding system for corrosive liquid without a pump valve, the feeding system comprising a control device, a feeding device, a dosing device and a communication device, but not comprising a pump or a valve, wherein the control device comprises a motion control module; the feeding device comprises a first material tank, a second material tank and a weighing part, and the difference value of the total weight of the first material tank and the total weight of the second material tank at different times can be obtained through the weighing part; the batching device comprises a liquid level tank, a discharge pipe, a throttling element and a lower tank, wherein the liquid level tank comprises a first exhaust port, a feed inlet at the upper end, an overflow port on the side wall and a discharge outlet at the bottom, and the material flow of the discharge outlet is less than 5% and more than 5% of that of the feed inlet; the throttling piece is arranged between the discharge hole and the discharge pipe and can adjust the flow of the material entering the discharge pipe from the discharge hole under the control of the motion control module; the discharge pipe is positioned below the liquid level tank and can convey inflow materials to target equipment; the lower tank is positioned below the liquid level tank and comprises a second air outlet and a backflow port, and materials flowing out of the discharge port and not entering the discharge pipe can be recycled to the second material tank through the backflow port; the communicating device comprises a conveying pipe and a recovery pipe, the conveying pipe communicates the lower part of the first material tank with the feed inlet and is used for conveying the materials in the first material tank to the batching device; the recovery pipe is used for communicating the upper part of the second charging bucket with the overflow port and the backflow port and recovering materials which do not enter target equipment in the batching device, and the materials are corrosive.

In an exemplary embodiment of the present invention, the control device may further include a lifting control module, wherein two ends of the lifting control module are respectively connected to the first material tank and the second material tank, so that a heavier one of the first material tank and the second material tank can be adjusted to a higher position higher than the feed port of the batching device, so that the material tank at the higher position can be used for feeding, and the material tank at a lower position lower than the return port of the lower position can be used for recycling; the material conveying pipe is used for communicating the lower part of the second material tank with the material inlet and conveying the materials in the second material tank from the high position to the material proportioning device; the recovery pipe is used for communicating the upper part of the first charging bucket with the overflow port and the backflow port and recovering materials which do not enter target equipment in the batching device.

In an exemplary embodiment of the invention, the lifting control module may include a speed reduction motor, a position sensor, a sprocket set and a chain matched with the sprocket set, the chain is connected with the speed reduction motor, two ends of the chain are respectively connected with the first material tank and the second material tank, the position sensor is capable of measuring the relative height of the first material tank and the second material tank, and the movement of the chain can be adjusted through the speed reduction motor.

In an exemplary embodiment of the present invention, the dosing device may further include a buffer member disposed between the feed port and the inner cavity of the liquid level tank and configured to buffer the flow of the material.

In an exemplary embodiment of the present invention, the dosing device may further include a feed pipe passing through the feed port and fixedly connected to the liquid level tank; the lower part of the feeding pipe is in threaded connection and communicated with the buffer piece.

In an exemplary embodiment of the invention, the throttling element may be located below a liquid level tank floor; the discharge pipe can be communicated with the throttling element and is fixedly connected with the bottom of the throttling element; the throttling element can rotate under the control of the motion control module to receive the material at the discharge hole at partial position.

In an exemplary embodiment of the invention, the throttle element may be semi-cylindrical and coaxial with the tapping pipe.

In an exemplary embodiment of the present invention, the motion control module may include a servo motor control structure, and the servo motor control structure may include a servo motor, a transmission member, and a bearing seat, and the servo motor drives the throttle member to rotate through the transmission member.

In an exemplary embodiment of the invention, the dosing device may further include a zero sensor capable of determining a position of the throttling element to ensure that material flowing through the discharge outlet does not enter the discharge pipe before the liquid level tank overflows.

Another aspect of the present invention provides a corrosive liquid feeding process, which uses any one of the above feeding systems to realize the addition of corrosive liquid as a material.

Compared with the prior art, the invention has the beneficial effects that: the feeding system without the pump valve and suitable for corrosive liquid and the feeding process of the corrosive liquid can be provided; the feeding system has the characteristics of no pump and no valve, so that the failure rate of equipment is greatly reduced, and maintenance-free operation can be basically realized; a thin-wall small hole constant flow model principle is adopted at the liquid level tank, so that the material flowing through the discharge port is stable and uniform; adopt the weighing method to calculate the material jar weight difference, can real-time supervision add the material volume of purpose equipment to with the material flow of throttling element auxiliary regulation entering discharging pipe, can realize that the high accuracy is reinforced.

Drawings

FIG. 1 shows a schematic diagram of the apparatus for the low-level tank addition process;

FIG. 2 shows a schematic diagram of the apparatus for the elevated tank addition process;

FIG. 3 illustrates a schematic diagram of a system for loading corrosive liquids without pump valves, according to an exemplary embodiment of the present invention;

FIG. 4 is a schematic diagram of the lift control module and feeder apparatus of an exemplary embodiment of the present invention;

FIG. 5 shows a schematic view of a dosing device according to an exemplary embodiment of the present invention;

FIG. 6 illustrates a partial structural view of a buffer of an exemplary embodiment of the present invention;

FIG. 7 illustrates a schematic view of a discharge port arrangement for flow isocratic adjustment in an exemplary embodiment of the invention;

FIG. 8 shows a schematic view of a precisely regulated flow port arrangement in an exemplary embodiment of the invention;

fig. 9 shows a schematic view of a discharge opening arrangement for stepless regulation of flow in an exemplary embodiment of the invention.

The labels in the figure are:

the device comprises a motion control module-A1, a lifting control module-A2, a servo motor-A11, a gear transmission component-A12, a bearing seat-A13, a worm gear speed reduction motor-A21, a chain wheel group-A22, a chain-A23, a position sensor-A24, a first material tank-B1, a second material tank-B2, a weight sensor-B3, a liquid level tank-C1, a discharge pipe-C2, a throttling element-C3, a lower tank-C4, a feed pipe-C5, a buffer element-C6, a zero position sensor-C7, a mechanical sealing element-C8, an equipment cylinder-C9, a feed pipe-D1 and a recovery pipe-D2.

Detailed Description

Hereinafter, the system and the process for feeding corrosive liquid without pump valve according to the present invention will be described in detail with reference to the exemplary embodiments and the accompanying drawings. Herein, "first," "second," etc. are merely for convenience of description and for convenience of distinction and are not to be construed as indicating or implying relative importance or a strict order of magnitude.

Example 1

In an exemplary embodiment of the invention, the feeding system for corrosive liquids without pump valves comprises a control device, a feeding device, a dosing device and a communication device, and does not comprise any pump or valve through which corrosive liquids need to flow.

The control device includes a motion control module. For example, the motion control module may include a servo motor control structure, which may include a servo motor, a transmission member, and a bearing seat, wherein the servo motor drives the throttle member to rotate through the transmission member (e.g., a belt transmission), so as to control and adjust the flow rate of the corrosive liquid or material. For example, the motion control module may also include a manually controlled mechanical structure (e.g., a hand gear drive).

In addition, controlling means still can further include the lift control module, and wherein, the first material jar and the second material jar are connected respectively to the both ends of lift control module to can adjust heavier one in first material jar and the second material jar to the high level that is higher than dosing unit's feed inlet, make the material jar of high level can supply, another is in the material jar of low level that is less than the backward flow mouth of lower jar and can retrieve. Meanwhile, the lower part of the second material tank is communicated with the feeding hole through a material conveying pipe in the communicating device, and the material conveying pipe is used for conveying materials in the second material tank from a high position to the batching device; and the recovery pipe in the communication device is also used for communicating the upper part of the first material tank with the overflow port and the return port and recovering materials which do not enter target equipment in the batching device. Here, the high position or the low position may be a fixed height or a limited height range. Make first material jar and second material jar feed in turn and retrieve through using lift control module, can make the material use more abundant, can avoid a lot of reinforced and lead to the procedure loaded down with trivial details from the external world. The lifting control module can include gear motor (for example, worm gear and worm gear motor), position sensor, sprocket group and with sprocket group matched with chain, the chain is connected with gear motor and both ends are connected first material jar and second material jar respectively, position sensor can measure the relative height that first material jar and second material jar, can adjust the motion of chain through gear motor. For example, the position sensor may be configured to determine whether a height difference between the first material tank and the second material tank is greater than or equal to a threshold (a minimum height difference between the high material tank and the low material tank when the high material tank supplies the material and the low material tank recovers the material), and if not, the speed reduction motor needs to be started to be greater than or equal to the threshold. The first material jar and the second material jar are controlled through gear motor's lift, then make things convenient for laborsaving more, save time just avoids the feed to appear being interrupted.

The feeding device comprises a first material tank, a second material tank and a weighing part, and the difference value of the total weight of the first material tank and the total weight of the second material tank at different times can be obtained through the weighing part. Here, both the first bucket and the second bucket have a storing function. For example, the weighing member may be a weight sensor or a level gauge (e.g., when the inner cavity of the bucket has a standard shape such as a cylinder). For example, the weight of the first material tank and the weight of the second material tank can be respectively measured in real time through a weight sensor, so as to obtain the difference value of the total weight of the two material tanks at different times, and the total amount of the material can be calculated.

The batching device comprises a liquid level tank, a discharge pipe, a throttling element and a lower tank. The liquid level jar includes the discharge gate of the overflow mouth and the bottom of first gas vent, upper end feed inlet, lateral wall, and the material flow of discharge gate is less than 5% of feed inlet and more than. Here, the total flow of the outlet should be at least 5% less than the total flow of the inlet in order to achieve a level of overflow of the material in the tank. For example, further, the total flow of the outlet should be at least less than 10% of the total flow of the inlet. Here, the first exhaust port has a function of preventing a pressure difference from being formed with air in the tank. For example, overflow ports are typically located in the upper half of the side wall of the level tank for recovery of material above that level.

The throttling element is arranged between the discharge hole and the discharge pipe and can adjust the flow of materials entering the discharge pipe from the discharge hole under the control of the motion control module. For example, the restriction may be located below the liquid level tank floor; the discharge pipe can be communicated with the throttling element and is fixedly connected with the bottom of the throttling element; the throttling element can rotate under the control of the motion control module to receive the material of the material outlet at partial positions. For example, the orifice may be a semi-cylindrical shape and coaxial with the tapping pipe. That is, the orifice member is capable of receiving no material at all that flows through the discharge opening when rotated to at least one position.

The discharging pipe is located the below of liquid level jar and can carry the material that flows into to purpose equipment. For example. The discharge pipe can be directly arranged at the inlet of the target equipment, and the target equipment can be communicated with the discharge pipe through a hose and the like.

The lower tank is located below the liquid level tank and comprises a second air outlet and a backflow port, and materials which flow out of the discharge port and do not enter the discharge pipe can be recycled to the second material tank through the backflow port. Here, the second exhaust port has a function of preventing a pressure difference from being generated between the lower tank and the air.

For example, the dosing device may further include a buffer member disposed between the feed port and the inner cavity of the liquid level tank and capable of buffering the flow of the material. For example, the dosing device may further comprise a feed pipe passing through the feed port and fixedly connected to the liquid level tank, and a lower portion of the feed pipe is in threaded connection and communication with the buffer member. For example, a flange may be fixedly attached (e.g., welded) to the upper end of the feed pipe for attachment to the feed delivery pipe. For example, the dosing device may further comprise a zero sensor capable of determining the position of the throttling element, so as to ensure that material flowing through the discharge opening does not enter the discharge pipe before the liquid level tank overflows.

The communicating device comprises a conveying pipe and a recovery pipe, the conveying pipe communicates the lower part of the first material tank with the feed inlet and is used for conveying the materials in the first material tank to the batching device; and the recovery pipe is used for communicating the upper part of the second charging bucket with the overflow port and the return port and recovering materials which do not enter target equipment in the batching device. For example, the delivery and recovery pipes may be hoses having corrosion protection properties.

Example 2

FIG. 3 shows a system architecture diagram of an exemplary embodiment of the present invention; FIG. 4 is a schematic diagram of the lift control module and feeder apparatus of an exemplary embodiment of the present invention; FIG. 5 shows a schematic view of a dosing device according to an exemplary embodiment of the present invention; FIG. 6 illustrates a partial structural view of a buffer of an exemplary embodiment of the present invention; FIG. 7 illustrates a schematic view of a discharge port arrangement for flow isocratic adjustment in an exemplary embodiment of the invention.

In an exemplary embodiment of the present invention, as shown in fig. 3, a system for feeding corrosive liquid without a pump valve includes a control device, a feeding device, a dosing device, and a communication device.

The control device includes a motion control module a1 and a lift control module a2 as shown in fig. 4. The motion control module a1 includes a servomotor control structure having a servomotor a11, a geared drive a12, and a bearing block a 13. The lifting control module A2 comprises a worm gear speed reducing motor A21, a chain wheel group A22, a chain A23 and a position sensor A24.

As shown in fig. 4, the feeding device includes a first material tank B1, a second material tank B2, and a weight sensor B3. The worm gear speed reducing motor A21 is fixedly arranged on the high platform, and the chain A23 is connected with the chain wheel group A22 and the worm gear speed reducing motor A21. The first charging bucket B1 and the second charging bucket B2 are respectively connected with the chains A23 on the left side and the right side through hook locks, and a weight sensor B3 and a position sensor A24 are arranged above the hook locks.

As shown in FIG. 5, the batching device comprises a liquid level tank C1, a discharge pipe C2, a throttling piece C3, a lower tank C4, a feeding pipe C5, a buffering piece C6, a zero position sensor C7, a mechanical sealing piece C8 and an equipment cylinder C9. The apparatus cylinder C9 is placed on the target apparatus with the tapping pipe C2 passing through the bottom of the apparatus cylinder C9 to communicate with the target apparatus. The zero position sensor C7 is arranged in the equipment cylinder C9, and the servo motor A11 is connected with the discharge pipe C2 through a gear transmission component A12. The bottom plate of the lower tank C4 is fixedly connected with the top of the equipment cylinder C9, the upper end surface of the lower tank C4 is provided with an exhaust port, and the position of the right side wall close to the bottom is provided with a return port. The upper end of the bearing seat A13 is tightly attached to the bottom plate of the lower tank C4 and is in key connection and sleeved on the discharge pipe C2, and the position, close to the bottom of the lower tank C4, of the discharge pipe C2 is sleeved with a mechanical sealing element C8 to prevent liquid leakage. The upper end of the discharge pipe C2 is fixedly connected with a semi-cylindrical throttling element C3 for collecting materials from the discharge hole. The liquid level tank C1 is positioned right above the throttling piece C3, and the side wall is welded and fixed with the lower tank C4. The top of the liquid level tank C1 is provided with an air outlet and a feed inlet, the upper part of the side wall is provided with an overflow port, the semicircular area at the bottom is provided with a discharge port as shown in figure 7, and the flow of the discharge port is less than 20% of the flow of the feed inlet. A feed pipe C5 passes through the feed inlet and is fixedly connected with the level tank C1. As shown in fig. 6, the dampener C6 is threadably connected to and communicates with the lower end of the feed tube C5. Wherein, the opening has been seted up to bolster C6 lateral wall, and this opening is enough big so that can guarantee the smooth and easy outflow of material and not take place to block up.

The communicating device comprises a feed delivery pipe D1 and a recovery pipe D2. The feed pipe D1 connects the lower parts of the first feed tank B1 and the second feed tank B2 to the feed pipe C5, and the recovery pipe D2 connects the overflow port, the return port to the upper part of the second feed tank B2 and also connects the overflow port, the return port to the upper part of the first feed tank B1.

Example 3

Fig. 8 shows a schematic view of a discharge orifice arrangement for fine flow regulation in an exemplary embodiment of the invention.

On the basis of the embodiment 2, in order to accurately adjust the material flow entering the target equipment, a discharge hole as shown in figure 8 is adopted.

Example 4

On the basis of the embodiment 2, in order to carry out stepless regulation on the material flow entering the target equipment, a discharge hole as shown in figure 9 is adopted.

When the feeding system works, after the feeding system for corrosive liquid without a pump valve is installed, the indication of the zero position sensor C7 is observed, and the servo motor A11 is controlled to enable the throttling element C3 to rotate to a non-discharge port half area. The target value of the charge is set, and the first charging bucket B1 is charged with enough NaOH solution material, and the second charging bucket B2 is empty. The first charging bucket B1 is lifted to the high position through the worm gear speed reducing motor A21, and correspondingly, the second charging bucket B2 comes to the low position, and the total weight of the charging buckets is recorded in real time through the weight sensor B3. The material flows from the first material tank B1 into the feeding pipe C5 through the feeding pipe D1, is buffered by the buffer C6 and then enters the liquid level tank C1 through the opening. The materials flow into the lower tank C4 after passing through the discharge port and are recovered to the second material tank B2 through the return port. Since the flow rate of the feeding pipe C5 is larger than that of the discharge port, the liquid level of the liquid level tank C1 gradually rises until the liquid level rises to the overflow port. After the liquid level in the liquid level tank C1 is stabilized, the materials flowing through the overflow port are recovered to the second charging bucket B2. According to the process requirement of target equipment, the program automatically calculates the rotation angle of the throttling piece C3 according to the required flow, and the material is guided into the discharge pipe C2 and directly enters the target equipment.

The second bucket B2 is gradually weighted more as the weight of the first bucket B1 is gradually reduced. At a certain moment, when the weight sensor B3 detects that the weight of the first material tank B1 enters a feeding dangerous area (namely the liquid level in the first material tank reaches the position near the position of an opening hole connected with a material conveying pipe D1), the height difference transmitted by the position sensor A24 is observed, the worm gear speed reducing motor A21 is started to lift the second material tank B2 to a high position, so that the height difference is higher than a threshold value, and the self-locking is realized. At this time, the material in the second material tank B2 is fed into the feed pipe C5, and the first material tank B1 is turned to recover the material.

After a while, when the charging amount reaches around the charging target value, the servo motor a11 adjusts the rotation angle of the throttle C3 so that the flow rate into the tapping pipe C2 gradually decreases until the charging target value is reached. At this time, the throttle C3 is already located in the half area other than the discharge port. And at the end of feeding, unloading the charging bucket and recovering the residual materials in each device.

In summary, the feeding system for corrosive liquid without pump valve of the present invention has the following beneficial effects: the feeding system for corrosive liquid without the pump valve is provided, and the whole system is free of pump and valve equipment, so that the failure rate of the equipment is greatly reduced, and maintenance-free operation can be basically realized; a thin-wall small hole constant flow model principle is adopted at the liquid level tank, so that the material flowing through the discharge port is stable and uniform; adopt the weighing method to calculate the material jar weight difference, can real time monitoring addition, the material flow that the regulating part auxiliary regulation got into the discharging pipe can realize that the high accuracy is reinforced.

Although the present invention has been described above in connection with the exemplary embodiments and the accompanying drawings, it will be apparent to those of ordinary skill in the art that various modifications may be made to the above-described embodiments without departing from the spirit and scope of the claims.

Claims

1. A charging system for corrosive liquid without pump valve, which is characterized in that the charging system comprises a control device, a feeding device, a batching device and a communication device, but does not comprise a pump or a valve,

the control device comprises a motion control module;

the feeding device comprises a first material tank, a second material tank and a weighing part, and the difference value of the total weight of the first material tank and the total weight of the second material tank at different times can be obtained through the weighing part;

the batching device comprises a liquid level tank, a discharge pipe, a throttling element and a lower tank, wherein the liquid level tank comprises a first exhaust port, a feed inlet at the upper end, an overflow port on the side wall and a discharge outlet at the bottom, and the material flow of the discharge outlet is less than 5% and more than 5% of that of the feed inlet; the throttling piece is arranged between the discharge hole and the discharge pipe and can adjust the flow of the material entering the discharge pipe from the discharge hole under the control of the motion control module; the discharge pipe is positioned below the liquid level tank and can convey inflow materials to target equipment; the lower tank is positioned below the liquid level tank and comprises a second air outlet and a backflow port, and materials flowing out of the discharge port and not entering the discharge pipe can be recycled to the second material tank through the backflow port;

the communicating device comprises a conveying pipe and a recovery pipe, the conveying pipe communicates the lower part of the first material tank with the feed inlet and is used for conveying the materials in the first material tank to the batching device; the recovery pipe is used for communicating the upper part of the second charging bucket with the overflow port and the backflow port and recovering materials which do not enter target equipment in the batching device, and the materials are corrosive.

2. The system for feeding corrosive liquid without pump valve according to claim 1, wherein said control device further comprises a lifting control module, wherein said lifting control module is connected to the first material tank and the second material tank at two ends thereof, so that the heavier one of the first material tank and the second material tank can be adjusted to a higher position higher than said feeding port of the dispensing device, so that the material can be fed from the higher position material tank, and the material can be recovered from the lower position material tank which is lower than said return port of the lower position material tank; the material conveying pipe is used for communicating the lower part of the second material tank with the material inlet and conveying the materials in the second material tank from the high position to the material proportioning device; the recovery pipe is used for communicating the upper part of the first charging bucket with the overflow port and the backflow port and recovering materials which do not enter target equipment in the batching device.

3. The feeding system of non-pump valve corrosive liquid of claim 2, wherein the lift control module comprises a speed reduction motor, a position sensor, a chain wheel set and a chain matched with the chain wheel set, the chain is connected with the speed reduction motor, and the two ends of the chain are respectively connected with the first material tank and the second material tank, the position sensor can measure the relative height of the first material tank and the second material tank, and the movement of the chain can be adjusted through the speed reduction motor.

4. The system for charging corrosive liquid without pump valve according to claim 1, wherein said dosing device further comprises a buffer member disposed between said feed port and the inner cavity of the liquid level tank and capable of buffering the flow of the material.

5. The system for charging corrosive liquid without pump valve according to claim 4, wherein said batching device further comprises a feeding pipe passing through said feeding port and fixedly connected to said liquid level tank; the lower part of the feeding pipe is in threaded connection and communicated with the buffer piece.

6. The system for charging corrosive liquids without pump valves of claim 1, wherein said throttling element is located below the bottom plate of the liquid level tank; the discharge pipe is communicated with the throttling element and is fixedly connected with the bottom of the throttling element; the throttling element can rotate under the control of the motion control module to receive the material at the discharge hole at partial position.

7. The system for charging corrosive liquid without pump valve in claim 6, wherein said throttling element is semi-cylindrical and coaxial with said discharge pipe.

8. The feeding system for corrosive liquid without pump valve according to claim 1, wherein said motion control module comprises a servo motor control structure, said servo motor control structure comprises a servo motor, a transmission member and a bearing seat, and said servo motor drives a throttling member to rotate through the transmission member.

9. The system for charging corrosive liquid without pump valve according to claim 1, wherein said dosing device further comprises a zero sensor capable of determining the position of said throttling element to ensure that material flowing through the discharge port does not enter the discharge pipe before the liquid level tank overflows.

10. A corrosive liquid feeding process, characterized in that the feeding process adopts the feeding system of any one of claims 1 to 9 to realize the feeding of the corrosive liquid as the material.