Fixed water curtain vapor-proof liquid adding device and liquid adding control method

Abstract

The invention provides a fixed water curtain vapor-proof liquid adding device and a liquid adding control method, and relates to a water curtain vapor-proof liquid adding structure, which comprises a water curtain generating device and a liquid adding control system which are arranged between a feeder and a conditioner, the water curtain generating device comprises a water curtain chamber and a spraying unit, an upper flange of the water curtain chamber is directly connected with a discharge port of the feeder, and a lower flange of the water curtain chamber is directly connected with a feed port of the conditioner; the liquid adding control system is used for introducing pressure water into the water curtain generating device, and the pressure water sprayed by the solid conical nozzles of the spraying unit forms a circle of spraying water curtain in the pipeline of the water curtain chamber, so as to be isolated between the feeder and the conditioner. Steam of the conditioner can be effectively prevented from escaping upwards, water sprayed by the water curtain can be more easily and uniformly combined with materials, and the inner part of the pipeline is not blocked and has no material residue risk; no water, energy and material loss exists, and the total water adding amount of the conditioner is not affected.

Description

Technical Field

[0001] The invention relates to a water curtain steam isolation and liquid adding device, in particular to a fixed water curtain steam isolation and liquid adding device and a liquid adding control method. Background Art

[0002] In the current mainstream feed production industry, whether it is the puffing process or the pelleting process, the process flow is a feeder plus a conditioner, that is, the powdered raw materials mixed according to the formula are fed into the conditioner through the feeder, water, steam or other additives such as oil, meat slurry, pigments, etc. are added to the conditioner, and the paddles in the conditioner are used to stir to achieve uniform mixing and heating, thereby reducing the workload of the downstream puffer or pelletizer and improving the quality and output of the finished feed; however, the steam added to the conditioner will inevitably dissipate everywhere, mainly returning to the feeder and then reaching the upstream equipment to form condensed water, thereby affecting the transportation of materials and forming material accumulation. , and the steam will also affect the normal operation and sealing of other equipment. Therefore, the industry will use various methods to discharge the steam escaping from the conditioner in advance, so as to reduce the impact on the feeder and its upstream equipment; for example, the current steam discharge method in the industry is mainly to add an exhaust port at the outlet of the feeder, and guide the steam to be discharged to other places to avoid the impact on the feeder itself and upstream equipment. However, the discharge process is prone to steam leakage, which will carry along the material dust, seriously affecting the on-site environment. Under conditions where some leakage is serious and the pipeline configuration is unreasonable, it is easy to block the pipeline. In addition, the escaped steam will also cause energy loss.

[0003] There are also some patent designs in the industry that address this issue. For example, the patent previously applied by our company is a water vapor separation steam energy recovery system for feed production (Announcement No. CN106959022A). This patent designs a steam recovery device that is installed at the exhaust port of the feeder. It uses water seals and sprays to block the escaped steam, and collects condensed water and the carried materials for reuse. However, this invention still has the following unresolved issues:

[0004] First, according to the description in line 0017 of the patent content, in order not to affect the total amount of water added to the conditioner, the water added from the water inlet pipe 11 belongs to the branch of the water adding pipeline of the conditioner. After the water enters from the water inlet pipe 11, it forms a water seal cavity 6, and then overflows the top of the inner cylinder 5 and returns to the conditioner through the reflux hole 8. However, it is gradually found in actual production that the material carried by the escaped steam is not small (this is also the reason why the pipeline is easy to be blocked as mentioned above), the material dust settles downward in the water, and the water inlet pipe 11 is arranged along the tangential direction, which will form a rotating water flow. Under the action of centrifugal force, The materials in the water are mainly located at the outer circle of the bottom, and it is difficult for them to rise and return to the conditioner from the reflux hole 8. After a period of time, the materials will accumulate and block the entire cavity. In addition, as part of the water addition to the conditioner, the water returning to the conditioner from the reflux hole 8 has a long path and a random trajectory. It basically flows along the pipe wall and passes through the feeder to reach the conditioner inlet. Compared with the water addition method of the conditioner itself through a nozzle or two-fluid water addition, this water addition method will greatly reduce the mixing and combining effect of water and materials. When the water flows through the feeder, it will also wet the feeder, which is easy to form wet accumulation and is not conducive to material discharge.

[0005] Second, the structure of the invention is too complicated and difficult to manufacture. The internal area is difficult to inspect and clean, and it is easy to produce material residues. The water overflowing from the reflux hole 8 is also likely to cause the feeder to produce material residues.

[0006] Third, the invention does not elaborate on the control method of adding liquid. The structural diagram indicates that the water sprayed by the spray system configured by the invention will eventually enter the conditioner, but the invention does not specify whether the water of the spray system also comes from the conditioner water supply pipeline. If it does not come from the conditioner water supply pipeline, the total amount of water added to the conditioner will produce errors. If it comes from the conditioner water supply pipeline, how is the three-way pipeline regulated, distributed and controlled? Will there be insufficient water supply or insufficient pressure for the spraying? Will there be insufficient water supply at the water inlet pipe 11? These are all unresolved technical problems. Summary of the invention

[0007] Based on this, the purpose of the present invention is to provide a fixed water curtain steam-isolating and liquid-adding device and a liquid-adding control method. By forming a stable steam-isolating water curtain inside the pipeline, the steam from the conditioner can be effectively prevented from escaping upward, and the water sprayed from the water curtain can be more easily evenly combined with the material, resulting in a better conditioning effect; there is no risk of blockage and material residue inside the pipeline, and it has a self-cleaning function; there is no loss of water, energy and material, and it does not affect the total amount of water added to the conditioner; the PID automatically controlled liquid addition and control system not only maintains the stability of the total amount of water added to the conditioner, but also ensures the stable working water pressure of the injection unit of the water curtain generating device; the structure is simple and compact, the sealing is reliable, and the installation is flexible and convenient.

[0008] The present invention provides the following technical solutions:

[0009] A fixed water curtain steam isolation and liquid adding device and a liquid adding control method, comprising a water curtain generating device and a liquid adding control system installed between a feeder and a conditioner; the water curtain generating device includes a water curtain chamber and a spraying unit, the upper flange of the water curtain chamber is directly connected to the discharge port of the feeder, and the lower flange of the water curtain chamber is directly connected to the feed port of the conditioner;

[0010] The liquid adding control system is used to introduce pressurized water into the water curtain generating device, and the pressurized water ejected from the solid cone nozzles of the spraying unit forms a circular spraying water curtain in the pipeline of the water curtain chamber, so as to isolate between the feeder and the conditioner, effectively preventing the steam in the conditioner from escaping upward from the feed port, avoiding the influence of steam on the feeder and upstream equipment, and protecting the on-site environment. The explanation of steam is as follows:

[0011] In feed production, the conditioner needs to add water and steam. In the prior art, water and steam are directly added to the conditioner. As for the specific adding methods, there are various methods, such as direct adding, atomizing adding by nozzles, and mixing adding of steam and water (i.e., two-fluid method). At the same time, after the steam is added to the conditioner, it is impossible to be completely absorbed. Actually, the steam in the conditioner is absorbed by the material while running to the area with lower pressure everywhere. It will run to the downstream puffing machine or granulator (this needs to be solved by other equipment or inventions. Even for the puffing machine line, this problem does not exist because the puffing machine itself still needs to add steam), and it will also run to the upstream equipment (such as feeders, disc silos, etc.). This is the problem that the present invention needs to solve. In ordinary feeders, the most commonly used feeding paddle method in the industry at present. There is relative movement between the screw paddle and the cylinder, and it is impossible to be sealed. Considering the possible deformation and error in the production of the feeder cylinder, the gap between the screw paddle and the cylinder is generally about 5 mm, and the steam will enter the feeder from this gap and then go up into the upper bin. This steam upward movement is also a problem often encountered in the actual working site;

[0012] In the present invention, the spraying water curtain ejected by the spraying unit can absorb the energy of the steam and return to the conditioner, which not only saves energy but also enhances the conditioning effect;

[0013] In the present invention, solid cone nozzles are adopted, and the ejected water is fine, uniform, and has a large coverage range, which can effectively combine with the material, promote the material to absorb water, and improve the conditioning effect;

[0014] In the present invention, the downstream of the device is directly connected to the conditioner, and the water sprayed by the water curtain, the material conveyed by the feeder, and the steam condensate all flow back to the conditioner, without loss of water, energy, and material, ensuring the water adding stability of the conditioner;

[0015] The present invention has a simple overall structure, a compact size, saves installation space, is flexible and convenient, and the internal pipeline adopts a detachable connection design to ensure reliable sealing. At the same time, the installation is relatively quick and the subsequent maintenance and repair is also very convenient.

[0016] Preferably, the water curtain generating device further comprises a cleaning unit, the spray unit is connected to the upper part of the water curtain chamber, and the cleaning unit is connected to the lower part of the water curtain chamber, and the spray unit sprays the water curtain water flow downwardly, while the cleaning unit sprays the water flow upwardly, for cleaning the inner wall of the water curtain chamber;

[0017] In the present invention, the water curtain spraying angle is downward, which will not affect the feeding process of the feeder, but will help to promote feeding and break up the agglomerated materials;

[0018] In the present invention, a circle of spray water curtain flushes the inside of the pipeline, leaving almost no material residue, and a separate cleaning unit is configured to effectively clean the nozzle and the water curtain spray unit, further improving the cleanliness of the pipeline and reducing material residue.

[0019] Preferably, the water curtain chamber comprises a conical tube wall 1 with a bottom end expanded outward and a conical tube wall 2 with a top end expanded outward, and the bottom end of the conical tube wall 1 is connected to the top end of the conical tube wall 2, and the conical tube wall 1 is vertically connected with a plurality of groups of nozzle joints 1 protruding outward along the circumferential direction, and the conical tube wall 2 is vertically connected with a plurality of groups of nozzle joints 2 protruding outward along the circumferential direction, and the nozzle joint 1 is used for one-to-one connection with the solid conical nozzles of the spray unit, and the nozzle joint 2 is used for one-to-one connection with the solid conical nozzles of the cleaning unit;

[0020] At this point, the pressurized water sprayed from each set of nozzle joints 1 and 2 spreads in a cone shape. The sprayed water is fine and uniform, covering a large area, and can effectively combine with the material or clean the inner wall. When combining with the material, it can promote the material to absorb water and improve the conditioning effect.

[0021] Furthermore, since the nozzle connector 1 and the nozzle connector 2 are respectively convexly connected, direct contact with the material can be avoided, thereby reducing material residue.

[0022] Preferably, the end of the extension line of the nozzle joint 2 intersecting with the water curtain chamber is arranged slightly higher than the nozzle joint 1, so as to ensure that the nozzle joint 1 can be fully cleaned during the cleaning operation.

[0023] Preferably, the water source for spraying the water curtain, the water source for cleaning the nozzle and the water source for the conditioner all come from the liquid adding control system and are controlled by the same water adding pump and flow meter to ensure that the water source is uninterrupted and the water addition amount of the conditioner is stable.

[0024] Preferably, the liquid adding control system further comprises a three-way regulating valve, a pressure sensor, a water curtain solenoid valve and a cleaning solenoid valve. When the conditioner is added with water, the water pumped out from the water pump passes through the flow meter and is divided into two paths. One path enters the cleaning unit after being controlled by the cleaning solenoid valve, and the other path enters the three-way regulating valve after being controlled by the water curtain solenoid valve, and then is further divided into two branches. One path enters the injection unit after being connected to the pressure sensor, and the other branch directly enters the water inlet flange of the conditioner. The pressure sensor is used to detect the pressure in the injection unit, and the pressure directly affects the water curtain effect sprayed by the solid conical nozzle. It can be seen that the water sprayed by the injection unit, the water directly entering the conditioner, and the water sprayed by the cleaning unit all come from the same water pump, and finally all flow into the conditioner. The total amount of water added to the conditioner is not affected. The water curtain solenoid valve directly controls the opening of the water curtain, which actually controls the direct water addition amount of the conditioner. The cleaning solenoid valve directly controls the cleaning unit, and the water curtain solenoid valve and the cleaning solenoid valve are interlocked and cannot be opened at the same time, otherwise it will affect the water curtain effect or cleaning effect. The water curtain solenoid valve needs to be opened when the conditioner is working normally, and the cleaning solenoid valve needs to be opened when production is completed or maintenance and overhaul.

[0025] Preferably, the spray unit includes a first annular liquid-filling pipe and a plurality of groups of 45° flange connecting pipes circumferentially connected to one side of the first annular liquid-filling pipe. When the spray unit is assembled with the water curtain chamber, the solid conical nozzle of the spray unit is pre-connected and sealed with the 45° flange connecting pipe through a pipe thread, and then the solid conical nozzle of the spray unit is inserted into the nozzle joint 1 on the water curtain chamber, and the connection between the 45° flange connecting pipe and the nozzle joint 1 is completed through a union nut.

[0026] Preferably, an O-ring is used to seal the solid conical nozzle of the spray unit and the nozzle joint 1 to prevent the material and water vapor inside the pipeline from entering and causing leakage and residue, and a sealing gasket is used to perform secondary sealing between the 45° flange pipe and the nozzle joint 1 to prevent water vapor from leaking into the external environment;

[0027] The first annular liquid adding pipe includes a first water inlet joint, a first annular pipe and multiple groups of first water outlet flanges. The first water outlet flange is butt-jointed with the docking flange of the 45° flange connecting pipe and is sealed by a sealing gasket. When the first water outlet flange is butt-jointed with the 45° flange connecting pipe, the installation direction of the 45° flange connecting pipe is freely adjusted after slightly loosening the union nut outside the nozzle joint, so that the docking flange of the 45° flange connecting pipe is horizontal, thereby making a reliable connection with the first annular liquid adding pipe.

[0028] Preferably, the cleaning unit comprises a second annular liquid-adding pipe and a plurality of groups of 70° flange pipes circumferentially connected to one side of the second annular liquid-adding pipe, and the cleaning unit has the same assembly structure and method as the water curtain chamber, and the solid conical nozzle of the cleaning unit is pre-connected and sealed with the 70° flange pipe through a pipe thread;

[0029] The second annular liquid adding pipe includes a second water inlet joint, a second annular pipe and multiple sets of second water outlet flanges. The second water outlet flange is butt-jointed with the docking flange of the 70° flange connecting pipe and is sealed by a sealing gasket. When the second water outlet flange is butt-jointed with the 70° flange connecting pipe, the installation direction of the 70° flange connecting pipe is freely adjusted after slightly loosening the union nut outside the second nozzle joint, so that the docking flange of the 70° flange connecting pipe is horizontal, thereby making a reliable connection with the second annular liquid adding pipe.

[0030] A liquid adding control method, based on the above-mentioned fixed water curtain steam isolation liquid adding device, comprises the following steps:

[0031] When adding water to the conditioner, the user first needs to set the total water flow rate (e.g. 2000L / h) and the water curtain pressure (e.g. 2bar) of the conditioner. After pressing the conditioner water adding button on the control panel, if the cleaning unit is working at this time, the control system will trigger an alarm and prompt to close the cleaning unit first. After the cleaning unit is manually closed, press the conditioner water adding button again, the conditioner will start to add water normally. At this time, the water curtain solenoid valve opens, the water pump opens, and the flow meter and PID control method are used to automatically control the speed of the water pump to reach the preset total water flow rate of 2000L / h. At the same time, the control system will receive the pressure measured by the pressure sensor in real time and compare it with the set water curtain pressure of 2bar. If the detected pressure is lower than the set water curtain pressure of 2bar, it means that the water intake of the injection unit is insufficient, and the control system will automatically The valve core of the three-way regulating valve is controlled to move upward to increase the water inlet of the injection unit and reduce the water inlet of the water inlet directly into the conditioner, until the detection pressure is close to or equal to the set water curtain pressure of 2 bar. At this time, the position of the valve core of the three-way regulating valve will be stable at a certain position. During this process, the total amount of water in the two ways output by the three-way regulating valve is basically unchanged, and through the PID control method and reasonable parameter setting, the fluctuation effect of the valve core adjustment process on the total water volume can be minimized to the greatest extent, thereby reducing the effect of the valve core adjustment process on the flow meter and water pump. On the contrary, if the detection pressure is higher than the set water curtain pressure of 2 bar, the control system will automatically control the valve core of the three-way regulating valve to move downward to reduce the water inlet of the injection unit and increase the water inlet of the water inlet directly into the conditioner, until the detection pressure is close to or equal to the set water curtain pressure of 2 bar;

[0032] When cleaning is required, the user first needs to set the cleaning flow rate (for example, 500L / h). After pressing the cleaning button on the control panel, if the injection unit is working at this time, the control system will trigger an alarm and prompt to close the conditioner water supply pipeline first. After manually closing the conditioner water supply pipeline, press the cleaning button again, the cleaning unit will start working normally. At this time, the cleaning solenoid valve is opened, the water pump is turned on, and the flow meter and PID control method are used to automatically control the pump speed to achieve the preset 500L / h total cleaning flow rate.

[0033] The beneficial effects of the present invention are:

[0034] 1. The water curtain steam isolation and liquid adding device of the present invention is installed between the feeder and the conditioner. By introducing pressurized water into the water curtain generating device, a circle of spray water curtain is formed inside the pipeline, isolating between the feeder and the conditioner, thereby preventing the steam in the conditioner from escaping upward, avoiding the influence of steam on the feeder and upstream equipment, and protecting the on-site environment. At the same time, the water curtain absorbs the energy of the steam and returns it to the conditioner, saving energy and enhancing the conditioning effect. The water curtain spray angle is biased downward, which will not affect the feeding of the feeder, but will promote the feeding and break up the agglomerated materials;

[0035] 2. In the present invention, a solid conical nozzle is used, and the water sprayed by the water curtain is fine, uniform and has a large coverage range, which can be effectively combined with the material, promote the absorption of water by the material, and have a better conditioning effect. After the inside of the pipeline is flushed by the water curtain, there is almost no material residue, which is cleaner and more sanitary. At the same time, the water curtain generating device of the invention is also separately equipped with a cleaning unit. The spray angle of the cleaning nozzle is upward, which can clean the nozzle of the water curtain spray unit and the upper area of ​​the water curtain chamber, further clean the internal pipeline, and reduce material residue;

[0036] 3. In the present invention, the downstream of the device is directly connected to the conditioner, and the water sprayed by the water curtain, the material transported by the feeder, the steam that becomes condensed water after being blocked, and the material carried by the steam are all located in the internal pipeline, and finally all directly return to the conditioner, without water, energy and material loss. The water source of the water curtain, the water source of the cleaning unit and the water source for directly adding water to the conditioner all come from the same liquid addition and control system, and are controlled by the same water adding pump and flow meter. The water sprayed by the water curtain and the water sprayed by the cleaning unit are also finally all returned to the conditioner, so the total amount of water added to the conditioner remains unchanged, and the device will not affect the water addition stability of the conditioner. At the same time, in order to form a stable steam-isolating water curtain in production, it is necessary to maintain a stable working water pressure (for example, 2 bar) in the first annular liquid adding pipe of the injection unit of the water curtain generating device. For this purpose, a pressure sensor and a three-way regulating valve are configured in the liquid addition and control system, and the amount of water entering the injection unit of the water curtain generating device is automatically adjusted by PID control to maintain its normal working water pressure;

[0037] 4. The present invention has a simple and compact structure, does not occupy too much installation space, is flexible and convenient to install, and the internal pipeline adopts a welding flange and a union nut design, which has reliable sealing, simple and quick installation, and is also relatively convenient for later maintenance and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0039] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 It is a system flow chart of the liquid adding control system controlling the liquid adding;

[0041] Figure 3 It is an exploded schematic diagram of the water curtain generating device;

[0042] Figure 4 is a cross-sectional view of a water curtain generating device;

[0043] Figure 5 yes Figure 4 A partial schematic diagram of part A;

[0044] Figure 6 It is a schematic diagram of the splitting of the spray unit and the cleaning unit;

[0045] Figure 7 It is a schematic diagram of the flange connection between the spray unit and the cleaning unit;

[0046] Figure 8 This is a schematic diagram of the water curtain spraying operation;

[0047] Fig. 9 This is a schematic diagram of water curtain room cleaning;

[0048] Fig.10 It is the logic diagram of water addition control of conditioner;

[0049] Fig.11 It is the cleaning control logic diagram of the water curtain generating device;

[0050] Markings in the figure:

[0051] 1. Water curtain generating device; 11. Water curtain chamber; 111. Conical pipe wall 2; 112. Upper flange; 113. Lower flange; 114. Nozzle joint 1; 12. Spray unit; 121. First annular liquid adding pipe; 1211. First annular pipe; 1212. First water outlet flange; 1213. First water inlet joint; 122. 45° flange pipe; 1221. Butt flange; 1222. Union nut; 123. Sealing gasket; 124. Solid conical nozzle; 1 25. O-ring; 126. Sealing gasket; 13. Cleaning unit; 131. Second annular liquid adding pipe; 1311. Second annular pipe; 1312. Second water outlet flange; 1313. Second water inlet joint; 132. 70° flange connecting pipe; 2. Liquid adding control system; 21. Water pump; 22. Flow meter; 23. Three-way regulating valve; 24. Pressure sensor; 25. Water curtain solenoid valve; 26. Cleaning solenoid valve; 3. Feeder; 4. Conditioner; 41. Water inlet flange. DETAILED DESCRIPTION

[0052] Example 1

[0053] like Figure 1-11 As shown, a fixed water curtain steam isolation and liquid adding device, in this embodiment, includes a water curtain generating device 1 and a liquid adding control system 2 installed between a feeder 3 and a conditioner 4; the water curtain generating device 1 includes a water curtain chamber 11 and a spray unit 12, an upper flange 112 of the water curtain chamber 11 is directly connected to the discharge port of the feeder 3, and a lower flange 113 of the water curtain chamber 11 is directly connected to the feed port of the conditioner 4;

[0054] The liquid adding control system 2 is used to introduce pressurized water into the water curtain generating device 1, and the pressurized water sprayed by the solid conical nozzle 124 of the spray unit 12 forms a circle of spray water curtain in the pipeline of the water curtain chamber 11, which is used to isolate between the feeder 3 and the conditioner 4, thereby effectively preventing the steam in the conditioner 4 from escaping upward from the feed inlet, so as to avoid the influence of steam on the feeder 3 and upstream equipment and protect the on-site environment. The explanation of steam is as follows:

[0055] In feed production, the conditioner 4 needs to be added with water and steam. In the prior art, water and steam are directly added to the conditioner 4. As for the specific adding method, there are various methods, such as direct adding, nozzle atomization adding, steam and water mixed adding (i.e. two-fluid method). At the same time, it is impossible for the steam to be completely absorbed after being added to the conditioner 4. In fact, the steam in the conditioner 4 is absorbed by the material while running to the low-pressure area, and will run to the downstream extruder or pelletizer (this needs other equipment or inventions to solve, and even for the extruder line, this problem does not exist because The extruder itself needs to add steam), and it will also go to the upstream equipment (such as the feeder 3, the disc silo, etc.), which is the problem to be solved by the present invention; in the ordinary feeder 3, the feeding blade method that is currently used most in the industry, there is relative movement between the propeller blade and the barrel, which is impossible to seal. Considering the possible deformation and error in the production of the feeder 3 barrel, the gap between the propeller blade and the barrel is generally about 5mm, and the steam will enter the feeder 3 from the gap and then go up to the upper silo. This steam rushing is also a problem often encountered in actual work sites;

[0056] In the present invention, the spray water curtain sprayed by the spray unit 12 can absorb the energy of the steam and return to the conditioner 4, which not only saves energy but also enhances the conditioning effect;

[0057] In the present invention, a solid conical nozzle 124 is used, and the water sprayed is fine and uniform, with a wide coverage, and can effectively combine with the material, promote the material to absorb water, and improve the conditioning effect;

[0058] In the present invention, the downstream of the device is directly connected to the conditioner 4, and the water sprayed by the water curtain, the material conveyed by the feeder 3, and the steam condensed water all flow back to the conditioner 4, without the loss of water, energy and material, thus ensuring the stability of water addition in the conditioner 4;

[0059] The present invention has a simple overall structure, a compact size, saves installation space, is flexible and convenient, and the internal pipeline adopts a detachable connection design to ensure reliable sealing. At the same time, the installation is relatively quick and the subsequent maintenance and repair is also very convenient.

[0060] The water curtain generating device 1 also includes a cleaning unit 13, the spray unit 12 is connected to the upper part of the water curtain chamber 11, and the cleaning unit 13 is connected to the lower part of the water curtain chamber 11, and the spray unit 12 sprays the water curtain water flow downwardly, while the cleaning unit 13 sprays the water flow upwardly, which is used to clean the inner wall of the water curtain chamber 11;

[0061] In the present invention, the water curtain spraying angle is downward, which will not affect the feeding process of the feeder 3, but will help to promote the feeding and break up the agglomerated materials;

[0062] In the present invention, a circle of spray water curtain flushes the inside of the pipeline, leaving almost no material residue, and a separate cleaning unit 13 is configured to effectively clean the nozzle and the water curtain spray unit 12, further improving the cleanliness of the pipeline and reducing material residue.

[0063] The water curtain chamber 11 includes a conical tube wall 1 with a bottom end expanded outward and a conical tube wall 2 111 with a top end expanded outward, and the bottom end of the conical tube wall 1 is connected to the top end of the conical tube wall 2 111, and the conical tube wall 1 is vertically connected with a plurality of groups of nozzle joints 114 protruding outward along the circumferential direction, and the conical tube wall 2 is vertically connected with a plurality of groups of nozzle joints 2 protruding outward along the circumferential direction, and the nozzle joint 114 is used to be connected with the solid conical nozzles 124 of the spray unit 12 in a one-to-one correspondence, and the nozzle joint 2 is used to be connected with the solid conical nozzles of the cleaning unit 13 in a one-to-one correspondence;

[0064] At this point, the pressurized water sprayed from each set of nozzle joints 114 and 2 is diffused in a cone shape, and the sprayed water is fine and uniform, with a large coverage area, and can effectively combine with the material or clean the inner wall. When combining with the material, it can promote the material to absorb water and improve the conditioning effect;

[0065] Furthermore, since the nozzle connector 1 114 and the nozzle connector 2 are respectively convexly connected, direct contact with the material can be avoided, thereby reducing material residue.

[0066] The end of the extension line of the nozzle joint 2 intersecting with the water curtain chamber 11 is arranged slightly higher than the nozzle joint 1 14, so as to ensure that the nozzle joint 1 14 can be fully cleaned during the cleaning operation.

[0067] The water source for spraying the water curtain, the water source for cleaning the nozzle and the water source for the conditioner 4 all come from the liquid adding control system 2 and are controlled by the same water adding pump 21 and flow meter 22 to ensure that the water source is uninterrupted and the water addition amount of the conditioner 4 is stable.

[0068] The liquid adding control system 2 also includes a three-way regulating valve 23, a pressure sensor 24, a water curtain solenoid valve 25 and a cleaning solenoid valve 26. When the conditioner 4 is filled with water, the water pumped out from the water pump 21 passes through the flow meter 22 and is divided into two paths. One path enters the cleaning unit 13 after being controlled by the cleaning solenoid valve 26, and the other path enters the three-way regulating valve 23 after being controlled by the water curtain solenoid valve 25, and then is further divided into two branches. One branch is connected to the pressure sensor 24 and enters the injection unit 12, and the other branch directly enters the water inlet flange 41 of the conditioner 4. The pressure sensor 24 is used to detect the pressure in the injection unit 12, and the pressure directly affects the water curtain effect sprayed by the solid cone nozzle 124. It can be seen from the results that the water sprayed by the spray unit 12, the water directly entering the conditioner 4, and the water sprayed by the cleaning unit 13 all come from the same water pump 21, and finally all flow into the conditioner 4, and the total amount of water added to the conditioner 4 is not affected. The water curtain solenoid valve 25 directly controls the opening of the water curtain, and actually controls the direct water addition amount of the conditioner 4. The cleaning solenoid valve 26 directly controls the cleaning unit 13, and the water curtain solenoid valve 25 and the cleaning solenoid valve 26 are interlocked and cannot be opened at the same time, otherwise the water curtain effect or the cleaning effect will be affected. The water curtain solenoid valve 25 needs to be opened when the conditioner 4 is working normally, and the cleaning solenoid valve 26 needs to be opened when the production is completed or maintenance and overhaul.

[0069] The spray unit 12 includes a first annular liquid-filling pipe 121 and a plurality of groups of 45° flange pipes 122 circumferentially connected to one side of the first annular liquid-filling pipe 121. When the spray unit 12 is assembled with the water curtain chamber 11, the solid conical nozzle 124 of the spray unit 12 is pre-connected and sealed with the 45° flange pipe 122 through pipe threads, and then the solid conical nozzle 124 of the spray unit 12 is inserted into the nozzle joint 114 on the water curtain chamber 11, and the connection between the 45° flange pipe 122 and the nozzle joint 114 is completed through the union nut 1222.

[0070] The solid conical nozzle 124 of the injection unit 12 and the nozzle joint 114 are sealed with an O-ring 125 to prevent the internal material and water vapor from entering the pipeline to form leakage and residue. The 45° flange pipe 122 and the nozzle joint 114 are sealed with a sealing gasket 126 for secondary sealing to prevent water vapor from leaking into the external environment.

[0071] The first annular liquid adding pipe 121 includes a first water inlet joint 1213, a first annular pipe 1211 and a plurality of first water outlet flanges 1212. The first water outlet flange 1212 is butt-jointed with the docking flange 1221 of the 45° flange connecting pipe 122 and sealed by a sealing gasket 123. When the first water outlet flange 1212 is butt-jointed with the 45° flange connecting pipe 122, the installation direction of the 45° flange connecting pipe 122 is freely adjusted after slightly loosening the union nut 1222 outside the nozzle joint 114, so that the docking flange 1221 of the 45° flange connecting pipe 122 is horizontal, thereby being reliably connected with the first annular liquid adding pipe 121.

[0072] The cleaning unit 13 includes a second annular liquid-adding pipe 131 and a plurality of groups of 70° flange pipes 132 circumferentially connected to one side of the second annular liquid-adding pipe 131, and the cleaning unit 13 has the same assembly structure and method as the water curtain chamber 11, and the solid conical nozzle of the cleaning unit 13 is pre-connected and sealed with the 70° flange pipe 132 through pipe threads;

[0073] The second annular liquid adding pipe 131 includes a second water inlet joint 1313, a second annular pipe 1311 and multiple sets of second water outlet flanges 1312. The second water outlet flange 1312 is butt-jointed with the docking flange 1221 of the 70° flange connecting pipe 132 and sealed by a sealing gasket 123. When the second water outlet flange 1312 is butt-jointed with the 70° flange connecting pipe 132, the installation direction of the 70° flange connecting pipe 132 is freely adjusted after slightly loosening the union nut 1222 outside the second nozzle joint, so that the docking flange 1221 of the 70° flange connecting pipe 132 is horizontal, thereby making a reliable connection with the second annular liquid adding pipe 131.

[0074] Example 2

[0075] A liquid adding control method is based on a fixed water curtain steam isolation liquid adding device in embodiment 1. In this embodiment, the method comprises the following steps:

[0076] When the conditioner 4 is added with water, the user first needs to set the total water flow rate (for example, 2000L / h) and the water curtain pressure (for example, 2bar) of the conditioner 4. After pressing the water-adding button of the conditioner 4 on the control panel, if the cleaning unit 13 is working at this time, the control system will trigger an alarm and prompt to close the cleaning unit 13 first. After the cleaning unit 13 is manually closed, the conditioner 4 water-adding button is pressed again, and the conditioner 4 will start to add water normally. At this time, the water curtain solenoid valve 25 is opened, the water pump 21 is turned on, and the flow meter 22 and the PID control method are used to automatically control the speed of the water pump 21 to reach the preset total water flow rate of 2000L / h. At the same time, the control system will receive the pressure measured by the pressure sensor 24 in real time and compare it with the set water curtain pressure of 2bar. If the detected pressure is lower than the set water curtain pressure of 2bar, it means that the water intake of the injection unit 12 is insufficient, and the control system will automatically The valve core of the three-way regulating valve 23 is controlled to move upward to increase the water inlet of the injection unit 12 and reduce the water inlet directly into the water inlet of the conditioner 4, until the detection pressure is close to or equal to the set water curtain pressure of 2 bar. At this time, the position of the valve core of the three-way regulating valve 23 will be stable at a certain position. During this process, the total amount of water in the two ways output by the three-way regulating valve 23 is basically unchanged, and through the PID control method and reasonable parameter setting, the fluctuation effect on the total water volume during the valve core adjustment process can be minimized, thereby reducing the effect on the flow meter 2222 and the water pump 2121 during the valve core adjustment process. On the contrary, if the detection pressure is higher than the set water curtain pressure of 2 bar, the control system will automatically control the valve core of the three-way regulating valve 23 to move downward to reduce the water inlet of the injection unit 12 and increase the water inlet directly into the water inlet of the conditioner 4, until the detection pressure is close to or equal to the set water curtain pressure of 2 bar;

[0077] When cleaning is required, the user first needs to set the cleaning flow rate (for example, 500 L / h). After pressing the cleaning button on the control panel, if the injection unit 12 is working at this time, the control system will trigger an alarm and prompt to close the water supply pipeline of the conditioner 4 first. After the water supply pipeline of the conditioner 4 is manually closed, the cleaning button is pressed again, and the cleaning unit 13 will start working normally. At this time, the cleaning solenoid valve 26 is opened, the water pump 21 is turned on, and the flow meter 22 and the PID control method are used to automatically control the pump speed to reach the preset total cleaning flow rate of 500 L / h.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fixed water curtain steam isolation and liquid adding device, characterized in that: It comprises a water curtain generating device and a liquid adding control system installed between a feeder and a conditioner; the water curtain generating device comprises a water curtain chamber and a spray unit, the upper flange of the water curtain chamber is directly connected to the discharge port of the feeder, and the lower flange of the water curtain chamber is directly connected to the feed port of the conditioner; the liquid adding control system is used to introduce pressurized water into the water curtain generating device, and the pressurized water sprayed by the solid conical nozzle of the spray unit forms a circle of spray water curtain in the pipeline of the water curtain chamber to isolate the feeder and the conditioner.

2. A fixed water curtain steam isolation and liquid adding device according to claim 1, characterized in that: The water curtain generating device also includes a cleaning unit. The spray unit is connected to the upper part of the water curtain chamber, and the cleaning unit is connected to the lower part of the water curtain chamber. The spray unit sprays water curtain water flow downwardly, while the cleaning unit sprays water flow upwardly, which is used to clean the inner wall of the water curtain chamber.

3. A fixed water curtain steam isolation and liquid adding device according to claim 2, characterized in that: The water curtain chamber includes a conical tube wall 1 with a bottom end expanding outward and a conical tube wall 2 with a top end expanding outward, and the bottom end of the conical tube wall 1 is connected to the top end of the conical tube wall 2, and the conical tube wall 1 is vertically connected to a plurality of groups of nozzle joints 1 that protrude outward along the circumferential direction, and the conical tube wall 2 is vertically connected to a plurality of groups of nozzle joints 2 that protrude outward along the circumferential direction, the nozzle joint 1 is used for one-to-one connection with the solid conical nozzles of the spray unit, and the nozzle joint 2 is used for one-to-one connection with the solid conical nozzles of the cleaning unit.

4. A fixed water curtain steam isolation and liquid adding device according to claim 3, characterized in that: The end portion where the extension line of the second nozzle joint intersects with the water curtain chamber is arranged slightly higher than the first nozzle joint.

5. A fixed water curtain steam isolation and liquid adding device according to claim 2, characterized in that: The water source for spraying the water curtain, the water source for cleaning the nozzle and the water source for the conditioner all come from the liquid adding control system and are controlled by the same water adding pump and flow meter.

6. A fixed water curtain steam isolation and liquid adding device according to claim 5, characterized in that: The liquid adding control system also includes a three-way regulating valve, a pressure sensor, a water curtain solenoid valve and a cleaning solenoid valve. When the conditioner is added with water, the water pumped out from the water pump passes through the flow meter and is divided into two paths. One path enters the cleaning unit after being controlled by the cleaning solenoid valve, and the other path enters the three-way regulating valve after being controlled by the water curtain solenoid valve, and is then divided into two branches. One path enters the injection unit after being connected to the pressure sensor, and the other branch directly enters the water inlet flange of the conditioner. The pressure sensor is used to detect the pressure in the injection unit, and the water curtain solenoid valve and the cleaning solenoid valve are interlocked.

7. A fixed water curtain steam isolation and liquid adding device according to claim 2, characterized in that: The spray unit includes a first annular liquid-filling pipe and a plurality of groups of 45° flange pipes connected to one side of the first annular liquid-filling pipe along the circumferential direction. When the spray unit is assembled with the water curtain chamber, the solid conical nozzle of the spray unit is pre-connected and sealed with the 45° flange pipe through a pipe thread, and then the solid conical nozzle of the spray unit is inserted into a nozzle joint 1 on the water curtain chamber, and the connection between the 45° flange pipe and the nozzle joint 1 is completed through a union nut.

8. A fixed water curtain steam isolation and liquid adding device according to claim 7, characterized in that: The solid cone nozzle of the injection unit and the nozzle joint 1 are sealed with an O-ring, and the 45° flange pipe and the nozzle joint 1 are sealed with a sealing gasket for secondary sealing; The first annular liquid adding pipe includes a first water inlet joint, a first annular pipe and multiple groups of first water outlet flanges. The first water outlet flange is butt-jointed with the docking flange of the 45° flange connecting pipe and is sealed by a sealing gasket. When the first water outlet flange is butt-jointed with the 45° flange connecting pipe, the installation direction of the 45° flange connecting pipe is freely adjusted after slightly loosening the union nut outside the nozzle joint, so that the docking flange of the 45° flange connecting pipe is horizontal, thereby making a reliable connection with the first annular liquid adding pipe.

9. A fixed water curtain steam isolation and liquid adding device according to claim 8, characterized in that: The cleaning unit includes a second annular liquid adding pipe and multiple groups of 70° flange connecting pipes circumferentially connected to one side of the second annular liquid adding pipe, and the assembly structure and method of the cleaning unit are the same as those of the water curtain chamber, and the solid conical nozzle of the cleaning unit is pre-connected and sealed with the 70° flange connecting pipe through pipe threads.

10. A liquid adding control method, based on a fixed water curtain steam isolation liquid adding device according to any one of claims 2 to 9, characterized in that: The steps include: When adding water to the conditioner, the user first needs to set the total water flow rate and water curtain pressure of the conditioner. After pressing the conditioner water adding button on the control panel, if the cleaning unit is working at this time, the control system will trigger an alarm and prompt to close the cleaning unit first. After the cleaning unit is manually closed, press the conditioner water adding button again, the conditioner will start to add water normally. At this time, the water curtain solenoid valve opens, the water pump turns on, and the flow meter and PID control method are used to automatically control the speed of the water pump to reach the preset total water flow rate. At the same time, the control system will receive the pressure sensor measured in real time. The pressure is measured and compared with the set water curtain pressure. If the detected pressure is lower than the set water curtain pressure, the control system will automatically control the three-way regulating valve to increase the water inlet of the injection unit and reduce the water inlet of the water inlet directly into the conditioner until the detected pressure is close to or equal to the set water curtain pressure. At this time, the position of the valve core of the three-way regulating valve will be stable. On the contrary, if the detected pressure is higher than the set water curtain pressure, the control system will automatically control the three-way regulating valve to reduce the water inlet of the injection unit and increase the water inlet of the water inlet directly into the conditioner until the detected pressure is close to or equal to the set water curtain pressure. When cleaning is required, the user is first required to set the cleaning flow rate. After pressing the cleaning button on the control panel, if the injection unit is working at this time, the control system will trigger an alarm and prompt to close the conditioner water supply pipeline first. After manually closing the conditioner water supply pipeline, press the cleaning button again, and the cleaning unit will start working normally. At this time, the cleaning solenoid valve is opened, the water pump is turned on, and the flow meter and PID control method are used to automatically control the pump speed to achieve the preset total cleaning flow rate.

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