An automatic cleaning plate heat exchanger for washing fluorine with high-purity niobium oxide

Abstract

The present invention belongs to the technical field of chemical auxiliary equipment, and relates to an automatically cleaned plate heat exchanger for washing fluorine with high-purity niobium oxide. The motor drives all the sweepers to rotate, and the sweeping plate simultaneously sweeps the bottom of the first cavity, the bottom of the second cavity, the adjacent water plate, steam plate or the rear end face of the front sealing plate. The water in the first cavity and the steam in the second cavity both pass through a circuitous path, which increases the length of the path and the residence time therein, so that they have enough time to exchange heat, thereby improving the heat exchange efficiency. An assembly of a sweeper and a water plate is an installation unit, and an assembly of a sweeper and a steam plate is an installation unit, which is easy to disassemble and install. The present invention can be wiped without disassembling, can quickly remove scale, has simple process steps, high work efficiency, saves labor, and improves labor efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical auxiliary equipment and relates to an improved plate heat exchanger, in particular to an automatic cleaning plate heat exchanger used for washing fluorine from high-purity niobium oxide. Background Art

[0002] In the process of producing niobium oxide, hot water is needed to wash fluorine. Currently, water is heated by steam, and the equipment used is a plate heat exchanger.

[0003] The plate heat exchanger includes a plurality of water-passing plates, a plurality of steam-passing plates and a front sealing plate; the water-passing plates and the steam-passing plates each have a flat front end face and a rear end face, the front end faces each have a cavity opening forward, and the front sealing plate has a flat rear end face; the cavity of the water-passing plates is the first cavity, and the cavity of the steam-passing plates is the second cavity; the plurality of water-passing plates and the plurality of steam-passing plates are arranged alternately front and back, that is, the water-passing plate in the middle has a steam-passing plate in front and a steam-passing plate in the back, and similarly, the steam-passing plate in the middle has a water-passing plate in front and a water-passing plate in the back; the front of the water-passing plate The end face is sealed and pressed against the rear end face of the front adjacent steam plate, and the first cavity of the water pass plate and the rear end face of the steam pass plate form a sealed space; the front end face of the steam pass plate is sealed and pressed against the rear end face of the front adjacent water pass plate, and the second cavity of the steam pass plate and the rear end face of the water pass plate form a sealed space; the frontmost water pass plate or steam pass plate is sealed and pressed against the rear end face of the front sealing plate, and the cavity of the frontmost water pass plate or steam pass plate and the rear end face of the front sealing plate form a sealed space; the water pass plate, steam pass plate and front sealing plate are sealed and pressed against each other by threaded connectors passing through them. The first bolt through hole, the second bolt through hole and the third bolt through hole are tightened to achieve this; the water-passing plate is provided with a first steam inlet main hole, a first steam outlet main hole, a first water outlet main hole and a first water inlet main hole which are transparent from front to back; the steam-passing plate is provided with a second steam inlet main hole, a second steam outlet main hole, a second water outlet main hole and a second water inlet main hole which are transparent from front to back; all the first steam inlet main holes and the second steam inlet main holes are aligned front to back to form a steam inlet main hole; all the first steam outlet main holes and the second steam outlet main holes are aligned front to back to form a steam outlet main hole; all the first water outlet main holes and the second water outlet main holes are aligned front to back to form a The first main water inlet holes and the second main water inlet holes are aligned front to back to form the main water inlet holes; the water pass plate is also provided with a water outlet branch hole and a water inlet branch hole, the water outlet branch hole connects the first water outlet main hole and the first cavity in the water pass plate, and the water inlet branch hole connects the first water inlet main hole and the first cavity in the water pass plate; the steam pass plate is also provided with a steam inlet branch hole and a steam outlet branch hole, the steam inlet branch hole connects the second steam inlet main hole and the second cavity, and the steam outlet branch hole connects the second steam outlet main hole and the second cavity; the front ends of the steam inlet main hole, the steam outlet main hole, the water outlet main hole and the water inlet main hole are blocked by the rear end face of the front sealing plate;

[0004] Cold water is introduced from the last first water inlet main hole or the second water inlet main hole, flows through the water inlet main hole channel formed by the first water inlet main hole and the second water inlet main hole, flows into the first cavity through the water inlet branch hole, then flows into the water outlet main hole channel formed by the first water outlet main hole and the second water outlet main hole through the water outlet branch hole, and flows out from the last first water outlet main hole or the second water outlet main hole;

[0005] Steam is introduced from the last first steam inlet main hole or the second steam inlet main hole, flows through the steam inlet main hole channel composed of the first steam inlet main hole and the second steam inlet main hole, flows into the second cavity through the steam inlet branch hole, and then flows into the steam outlet main hole channel composed of the first steam outlet main hole and the second steam outlet main hole through the steam outlet branch hole, and flows out from the last first steam outlet main hole or the second steam outlet main hole; the cold water in the first cavity and the steam in the second cavity exchange heat through the wall of the water plate or the wall of the steam plate, so that the cold water absorbs heat to become hot water, and the steam releases heat to become water.

[0006] During the working process, water and steam both produce scale, which adheres to the wall of the first cavity or the second cavity, affecting heat conduction and reducing conduction efficiency, and needs to be wiped off regularly. Currently, the threaded connector is disassembled to disassemble the water plate, steam plate and front sealing plate, so that the first cavity, the second cavity, the rear end face of the water plate, the rear end face of the steam plate and the rear end face of the front sealing plate are all exposed, and then wiped. The process steps are complicated and the work efficiency is low. There is no better way to quickly remove scale. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides an automatic cleaning plate heat exchanger for washing fluorine with high-purity niobium oxide, which can be wiped without disassembly, can quickly remove scale, has simple process steps, high work efficiency, saves labor, and improves labor efficiency, thereby solving the problems raised by the above background technology.

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

[0009] A plate heat exchanger capable of automatic cleaning for washing fluorine with high-purity niobium oxide comprises a plurality of water-passing plates, a plurality of steam-passing plates and a front sealing plate; the water-passing plates and the steam-passing plates each have a flat front end face and a rear end face, the front end faces each have a cavity opening forward, and the front sealing plate has a flat rear end face; the cavity of the water-passing plates is a first cavity, and the cavity of the steam-passing plates is a second cavity; the plurality of water-passing plates and the plurality of steam-passing plates are arranged alternately front and back, that is, the water-passing plate in the middle has a steam-passing plate in front and another steam-passing plate in the back, and similarly, the steam-passing plate in the middle has a water-passing plate in front and a water-passing plate in the back. The front face of the water pass plate is close to another water pass plate; the front end face of the water pass plate is sealed and pressed with the rear end face of the front adjacent steam pass plate, and the first cavity of the water pass plate and the rear end face of the steam pass plate form a sealed space; the front end face of the steam pass plate is sealed and pressed with the rear end face of the front adjacent water pass plate, and the second cavity of the steam pass plate and the rear end face of the water pass plate form a sealed space; the frontmost water pass plate or steam pass plate is sealed and pressed with the rear end face of the front sealing plate, and the cavity of the frontmost water pass plate or steam pass plate and the rear end face of the front sealing plate form a sealed space; the water pass plate, steam pass plate and front sealing plate are sealed and pressed front and back by threads The connection piece is passed through the first bolt through hole, the second bolt through hole and the third bolt through hole on them and tightened; the water-passing plate is provided with a first steam inlet main hole, a first steam outlet main hole, a first water outlet main hole and a first water inlet main hole which are transparent from front to back; the steam-passing plate is provided with a second steam inlet main hole, a second steam outlet main hole, a second water outlet main hole and a second water inlet main hole which are transparent from front to back; all the first steam inlet main holes and the second steam inlet main holes are aligned front to back to form the steam inlet main holes; all the first steam outlet main holes and the second steam outlet main holes are aligned front to back to form the steam outlet main holes; all the first water outlet main holes and the second water outlet main holes are aligned front to back to form the steam outlet main holes The first and second water inlet main holes are aligned front to back to form a main water inlet hole; all the first water inlet main holes and the second water inlet main holes are aligned front to back to form a main water inlet hole; a water outlet branch hole and a water inlet branch hole are also provided in the water pass plate, the water outlet branch hole connects the first water outlet main hole and the first cavity in the water pass plate, and the water inlet branch hole connects the first water inlet main hole and the first cavity in the water pass plate; a steam inlet branch hole and a steam outlet branch hole are also provided in the steam pass plate, the steam inlet branch hole connects the second steam inlet main hole and the second cavity, and the steam outlet branch hole connects the second steam outlet main hole and the second cavity; the front ends of the steam inlet main hole, the steam outlet main hole, the water outlet main hole and the water inlet main hole are all sealed and blocked by the rear end face of the front sealing plate;

[0010] The first cavity and the second cavity are cylindrical inner cavities; a through hole is provided at the bottom center of the cylindrical inner cavity;

[0011] It also includes a plurality of cleaners; the cleaners include four cleaning plates and an intermediate shaft, one end of each of the four cleaning plates is fixedly connected to the intermediate shaft; a front end clutch is provided at the front end of the intermediate shaft; and a rear end clutch is provided at the rear end of the intermediate shaft;

[0012] The sweeper and the water-passing plate are assembled together, and the intermediate shaft of the sweeper and the through hole at the center of the bottom of the cylindrical inner cavity are sealed and matched to form a rotating pair;

[0013] The sweeper and the steam plate are assembled together, and the intermediate shaft of the sweeper and the through hole at the center of the bottom of the cylindrical inner cavity are sealed and matched to form a rotating pair;

[0014] Four cleaning plates divide the cylindrical inner cavity into four sub-cavities, and a connecting hole is provided on the cleaning plate, and the connecting hole connects two adjacent sub-cavities;

[0015] The intermediate shafts of all the sweepers are arranged front and back on an axis, and the front clutches and rear clutches of two adjacent sweepers are engaged. The assembly of a sweeper and a water plate is an installation unit, and the assembly of a sweeper and a steam plate is an installation unit. It is easy to disassemble during maintenance. When installing, the front clutch and the rear clutch are inserted and engaged, and all the sweepers are connected together, which is easy to install. Each installation unit is also a sealed unit, and the adjacent spaces are isolated from each other.

[0016] The rear end clutch of the last sweeper is connected to the driving device, or the sweepers are manually shaken using a crank, so that the sweepers drive each other to rotate, and all the sweepers rotate together.

[0017] The driving device can be a motor, and the output shaft of the motor is connected to the rear intermediate shaft through a clutch.

[0018] Cold water is introduced from the last first water inlet main hole or the second water inlet main hole, flows through the water inlet main hole, flows into one of the sub-cavities of the first cavities through the multiple water inlet branch holes, passes through the circuitous path separated by the sub-cavities and the connecting hole, and then flows into the water outlet main hole through the multiple water outlet branch holes, and flows out from the last first water outlet main hole or the second water outlet main hole;

[0019] Steam is introduced from the last first steam inlet main hole or the second steam inlet main hole, flows through the steam inlet main hole, and flows into one of the sub-cavities of the multiple second cavities through multiple steam inlet branch holes, passes through a circuitous path separated by the sub-cavities and the connecting holes, and then flows into the steam outlet main hole through multiple steam outlet branch holes, and flows out from the last first steam outlet main hole or the second steam outlet main hole. Most of the steam will condense into water in the meantime; the cold water in the first cavity and the steam in the second cavity exchange heat through the wall of the water plate or the wall of the steam plate, so that the cold water absorbs heat to become hot water, and the steam releases heat to become condensed water; the water in the first cavity and the steam in the second cavity both pass through a circuitous path, which increases the length of the path and the residence time inside, so that they have enough time to exchange heat, thereby improving the heat exchange efficiency.

[0020] At regular intervals, such as four hours, the motor is turned on and drives all the cleaners to rotate. The cleaning plates simultaneously clean the bottom of the first cavity, the bottom of the second cavity, the adjacent water plate, steam plate or the rear end face of the front sealing plate, so that the scale on the surface is loosened and cleaned in time, and washed away with water in time to prevent it from being firmly attached for a long time, so as to keep it clean for a long time and maintain a high heat exchange efficiency.

[0021] Its driving device can also be a hydraulic drive plate assembly; the hydraulic drive plate assembly includes a hydraulic drive plate and a rotary piston assembly; the hydraulic drive plate assembly has a flat front end face; the hydraulic drive plate is provided with a third steam inlet main hole, a third steam outlet main hole, a third water outlet main hole and a third water inlet main hole which are transparent from front to back; the front end face of the hydraulic drive plate is provided with a cylindrical cavity with an opening facing forward, and a hole is provided in the center of the bottom of the cylindrical cavity; the bottom of the cylindrical cavity also has a transparent first drive hole and a second drive hole; a partition plate, a left stopper and a right stopper are also radially fixedly arranged in the cylindrical cavity, and the left stopper and the right stopper are respectively located on the left and right sides of the partition plate; the rotary piston assembly includes a shaft and a rotary piston, the front end of the shaft of the rotary piston assembly is a piston front clutch, and the shaft of the rotary piston assembly is in contact with the bottom of the cylindrical cavity of the hydraulic drive plate. The holes in the center of the parts are connected through a rotating pair, the front end of the hydraulic drive plate is pressed and sealed with the rear end face of the last water plate or steam plate; the front clutch of the piston is engaged with the rear end clutch of the last sweeper; the front end of the third steam inlet main hole is connected with the rear end of the steam inlet main hole; the front end of the third steam outlet main hole is connected with the rear end of the steam outlet main hole; the front end of the third water outlet main hole is connected with the rear end of the water outlet main hole; the front end of the third water inlet main hole is connected with the rear end of the water inlet main hole; the cylindrical cavity on the front end face of the hydraulic drive plate and the rear end face of the water plate or steam plate form a sealed chamber, and the rotating piston and the partition plate together divide the sealed chamber into two parts isolated from each other, which are the first cavity and the second cavity, the first drive hole is connected with the first cavity, and the second drive hole is connected with the second cavity;

[0022] When high-pressure water is introduced into the first cavity through the first driving hole, the high-pressure water drives the rotary piston to rotate, so that the volume of the first cavity becomes larger and the second cavity becomes smaller, and the water in the second cavity is squeezed and flows out through the second driving hole; until the rotary piston is blocked by the right stopper and stops rotating;

[0023] High-pressure water is introduced into the second cavity through the second driving hole, and the high-pressure water drives the rotary piston to rotate, so that the volume of the second cavity becomes larger and the first cavity becomes smaller, and the water in the first cavity is squeezed and flows out through the first driving hole; until the rotary piston is blocked by the left stopper and stops rotating;

[0024] By alternately introducing high-pressure water into the first driving hole and the second driving hole, the rotary piston can be driven to swing back and forth, and the rotary piston assembly drives all the cleaners to rotate, thereby achieving the purpose of automatic cleaning of the cleaners.

[0025] It also includes a three-position four-way solenoid valve, wherein the solenoid valve A working port of the three-position four-way solenoid valve is connected to the first drive hole; the solenoid valve B working port of the three-position four-way solenoid valve is connected to the second drive hole; and the water source working port is connected to the pressure water source.

[0026] Its return port merges into the third water inlet main hole, so that the pressurized water drives the sweeper to rotate and then participates in heat exchange, which is reused and does not waste water.

[0027] The driving device can also be an electromagnetic driving assembly; the electromagnetic driving assembly includes an electromagnetic driving plate, an electromagnetic driving bar and a semi-annular electromagnet; a hole is provided in the center of the electromagnetic driving plate;

[0028] The electromagnetic drive bar includes an axis and an electromagnetic swing arm, the first end of the electromagnetic swing arm is fixedly connected to the axis of the electromagnetic drive bar, and the second end of the electromagnetic swing arm is fixedly connected to a permanent magnet; the axis of the electromagnetic drive bar and the hole of the electromagnetic drive plate are combined to form a rotating pair; an electromagnetic front clutch is provided at the front end of the axis of the electromagnetic drive bar; the semi-annular electromagnet is fixedly connected to the electromagnetic drive plate, and the semi-annular electromagnet includes a semi-annular iron core and a coil, and the coil is wound on the iron core, which can enhance the attraction of the magnetic field to the permanent magnet; the electromagnetic drive plate is fixedly connected to the last water plate or steam plate, and the electromagnetic front clutch is engaged with the rear end clutch of the last sweeper; a positive current is passed through the coil, and the semi-annular electromagnet generates a magnetic field, which drives the electromagnetic drive bar to swing forward through the permanent magnet, and the electromagnetic front clutch drives all the sweepers to swing, and a reverse current is passed through the coil, and the permanent magnet drives the electromagnetic drive bar to swing reversely. By alternating the direction of the current, the sweeper can be driven to swing forward and reverse, thereby achieving the purpose of automatic cleaning.

[0029] The beneficial effects of the present invention are: there is no need to disassemble the water pass plate, the steam pass plate and the front sealing plate, and the heat exchange surface can be wiped without exposing it, so scale can be quickly removed, the process steps are simple, the work efficiency is high, labor is saved, and labor efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a partial cross-sectional schematic diagram of the three-dimensional structure of Example 1 of the present invention;

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of the assembly of the water-passing plate 1 and the sweeper 4;

[0032] Figure 3 It is a schematic diagram of the three-dimensional structure of the sweeper 4;

[0033] Figure 4It is a three-dimensional structural schematic diagram of the steam plate 2 and the sweeper 4 assembly;

[0034] Figure 5 3 is a schematic diagram of the three-dimensional structure of the front sealing plate 3;

[0035] Figure 6 is a schematic diagram of the three-dimensional structure of embodiment 2 of the present invention;

[0036] Figure 7 is a schematic diagram of the three-dimensional structure of the hydraulic drive plate assembly 6;

[0037] Figure 8 is a schematic diagram of the three-dimensional structure of the hydraulic drive plate 61;

[0038] Fig. 9 is a schematic diagram of the three-dimensional structure of the rotary piston assembly 62;

[0039] Fig.10 is a schematic diagram of the three-dimensional structure of Example 3 of the present invention;

[0040] Fig.11 is a partial cross-sectional schematic diagram of the three-dimensional structure of the electromagnetic drive strip 72;

[0041] Fig.12 Schematic diagram of the three-dimensional structure of the semi-annular electromagnet 73.

[0042] The accompanying drawings are marked as follows: 1, water plate; 10, water cavity; 11, first steam inlet main hole; 12, first steam outlet main hole; 13, first water outlet main hole; 14, first water inlet main hole; 15, first bolt through hole; 16, water outlet branch hole; 17, water inlet branch hole; 18, first sealing ring groove; 19, first cavity; 2, steam plate; 20, steam cavity; 21, second steam inlet main hole; 22, second steam outlet main hole; 23, second water outlet main hole; 24, second water inlet main hole; 25, Second bolt hole; 26, steam inlet branch hole; 27, steam outlet branch hole; 28, second sealing ring groove; 29, second cavity; 3, front sealing plate; 31, front cover; 32, avoidance blind hole; 35, third bolt hole; 4, sweeper; 41, sweeper plate; 42, connecting hole; 43, front clutch; 44, rear clutch; 5, motor; 6, hydraulic drive plate assembly; 61, hydraulic drive plate; 611, third steam inlet main hole; 612, third steam outlet main hole; 61 3. The third water outlet main hole; 614. The third water inlet main hole; 615. The third bolt through hole; 6161. The first drive hole; 6162. The second drive hole; 6171. The right stopper; 6172. The left stopper; 618. The third sealing ring groove; 619. The partition plate; 62. The rotary piston assembly; 621. The front clutch of the piston; 622. The rotary piston; 631. The first cavity; 632. The second cavity; 100. The three-position four-way solenoid valve; 100A, A working port; 100B, B working port; 100P, water source working port; 100T, return port; 7, electromagnetic drive assembly; 71, electromagnetic drive plate; 715, fourth bolt through hole; 717, single stopper; 72, electromagnetic drive strip; 721, electromagnetic front clutch; 722, electromagnetic swing arm; 723, permanent magnet; 73, semi-annular electromagnet; 731, coil; 732, iron core; 8, threaded connector; 91, first sealing ring; 92, second sealing ring. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1, a plate heat exchanger capable of automatic cleaning for washing fluorine with high-purity niobium oxide, such as Figure 1-5As shown, it includes multiple water passing plates 1, multiple steam passing plates 2 and a front sealing plate 3; the water passing plates 1 and the steam passing plates 2 have a flat front end face and a rear end face, the front end faces have cavities opening forward, and the front sealing plate 3 has a flat rear end face; the cavity of the water passing plate 1 is a first cavity 19, and the cavity of the steam passing plate 2 is a second cavity 29; the multiple water passing plates 1 and the multiple steam passing plates 2 are arranged alternately front and back, that is, the water passing plate 1 located in the middle has a steam passing plate 2 in front and another steam passing plate 2 in the back, and similarly, the steam passing plate 2 located in the middle has a water passing plate 1 in front and another water passing plate 1 in the back; the front end face of the water passing plate 1 is adjacent to the steam passing plate 2 in front. The rear end face of the plate 2 is sealed and pressed, and the first cavity 19 of the water-passing plate 1 and the rear end face of the steam-passing plate 2 form a sealed space; the front end face of the steam-passing plate 2 is sealed and pressed with the rear end face of the water-passing plate 1 adjacent to the front, and the second cavity 29 of the steam-passing plate 2 and the rear end face of the water-passing plate 1 form a sealed space; the frontmost water-passing plate 1 or steam-passing plate 2 is sealed and pressed with the rear end face of the front sealing plate 3, and the cavity of the frontmost water-passing plate 1 or steam-passing plate 2 and the rear end face of the front sealing plate 3 form a sealed space; the water-passing plate 1, the steam-passing plate 2 and the front sealing plate 3 are sealed and pressed front and back by the threaded connecting piece 8 passing through the first bolt through hole 15, the second bolt through hole 25 and The third bolt passes through the hole 35 and is tightened to achieve this; the water-passing plate 1 is provided with a first steam inlet main hole 11, a first steam outlet main hole 12, a first water outlet main hole 13 and a first water inlet main hole 14 which are transparent from front to back; the steam-passing plate 2 is provided with a second steam inlet main hole 21, a second steam outlet main hole 22, a second water outlet main hole 23 and a second water inlet main hole 24 which are transparent from front to back; all the first steam inlet main holes 11 and the second steam inlet main holes 21 are aligned front to back to form the steam inlet main holes; all the first steam outlet main holes 12 and the second steam outlet main holes 22 are aligned front to back to form the steam outlet main holes; all the first water outlet main holes 13 and the second water outlet main holes 23 are aligned front to back to form the water outlet main holes; all the first inlet The main water hole 14 and the second main water inlet hole 24 are aligned front to back to form the main water inlet hole; the water pass plate 1 is also provided with a water outlet branch hole 16 and a water inlet branch hole 17, the water outlet branch hole 16 connects the first main water outlet hole 13 and the first cavity 19 in the water pass plate 1, and the water inlet branch hole 17 connects the first main water inlet hole 14 and the first cavity 19 in the water pass plate 1; the steam pass plate 2 is also provided with a steam inlet branch hole 26 and a steam outlet branch hole 27, the steam inlet branch hole 26 connects the second main steam inlet hole 21 and the second cavity 29, and the steam outlet branch hole 27 connects the second main steam outlet hole 22 and the second cavity 29; the front ends of the steam inlet main hole, the steam outlet main hole, the water outlet main hole and the water inlet main hole are sealed and blocked by the rear end face of the front sealing plate 3;

[0045] The first cavity 19 and the second cavity 29 are cylindrical cavities; a through hole is provided at the bottom center of the cylindrical cavity; a sweeper 4 is also provided; the sweeper 4 includes four sweeping plates 41 and an intermediate shaft, one end of each of the four sweeping plates 41 is fixedly connected to the intermediate shaft; a front clutch 43 is provided at the front end of the intermediate shaft; a rear clutch 44 is provided at the rear end of the intermediate shaft; the sweeper 4 is assembled with the water-passing plate 1, and the intermediate shaft of the sweeper 4 and the through hole at the bottom center of the cylindrical cavity are sealed and matched to form a rotating pair; the sweeper 4 and the steam-passing plate 1 are assembled together ... assembled together, and the sweeper 4 and the steam-passing plate 1 are assembled together, and the sweeper 4 and the steam-passing plate 1 are assembled together, and the sweeper 4 and the steam-passing plate 1 are sealed and matched to form a rotating pair; the sweeper 4 and the steam-passing plate 1 are assembled together, and the sweeper 4 and the steam-passing plate 1 are assembled together, and the sweeper 4 and the steam-passing plate 1 are The plates 2 are assembled together, and the intermediate shaft of the sweeper 4 and the through hole in the center of the bottom of the cylindrical inner cavity are sealed and matched to form a rotating pair; four sweeping plates 41 divide the cylindrical inner cavity into four sub-cavities, and a connecting hole 42 is provided on the sweeping plate 41, and the connecting hole 42 connects two adjacent sub-cavities; the intermediate shafts of all sweepers 4 are arranged front and back on an axis, and the front clutch 43 and the rear clutch 44 of two adjacent sweepers 4 are engaged; it also includes a motor 5, and the output shaft of the motor 5 is connected to the rear intermediate shaft through a clutch.

[0046] Cold water is introduced from the last first water inlet main hole 14 or the second water inlet main hole 24, and the cold water flows through the water inlet main hole, and flows into one of the sub-cavities of the multiple first cavities 19 through the multiple water inlet branch holes 17, passes through the circuitous path separated by the sub-cavities and the connecting hole 42, and then flows into the water outlet main hole through the multiple water outlet branch holes 16, and flows out from the last first water outlet main hole 13 or the second water outlet main hole 23; steam is introduced from the last first steam inlet main hole 11 or the second steam inlet main hole 21, and the steam flows through the steam inlet main hole, and flows into one of the sub-cavities of the multiple second cavities 29 through the multiple steam inlet branch holes 26, and passes through the sub-cavities and the connecting hole 42. The steam flows through the circuitous path separated by the holes 42, and then flows into the main steam outlet hole through a plurality of steam outlet branch holes 27, and flows out from the last first steam outlet main hole 12 or the second steam outlet main hole 22. Most of the steam will condense into water in the meantime. The cold water in the first cavity 19 and the steam in the second cavity 29 exchange heat through the wall of the water plate 1 or the wall of the steam plate 2, so that the cold water absorbs heat and becomes hot water, and the steam releases heat and becomes condensed water. The water in the first cavity 19 and the steam in the second cavity 29 both pass through the circuitous path, which increases the length of the path and the residence time therein, so that they have enough time to exchange heat, thereby improving the heat exchange efficiency.

[0047] At regular intervals, such as four hours, the motor 5 is turned on and drives all the cleaners 4 to rotate. The cleaning plate 41 simultaneously cleans the bottom of the first cavity 19, the bottom of the second cavity 29, the adjacent water plate 1, the steam plate 2 or the rear end face of the front sealing plate 3, so that the scale thereon is loosened and cleaned in time, and is washed away with water in time to prevent it from being firmly attached for a long time, so as to keep it clean for a long time and maintain a high heat exchange efficiency.

[0048] Example 2, a plate heat exchanger capable of automatic cleaning for washing fluorine with high-purity niobium oxide, such as Figure 6-9As shown, compared with Example 1, its driving device does not use a motor, but uses a hydraulic drive plate assembly 6; the hydraulic drive plate assembly 6 includes a hydraulic drive plate 61 and a rotary piston assembly 62; the hydraulic drive plate assembly 6 has a flat front end surface; the hydraulic drive plate 61 is provided with a third steam inlet main hole 611, a third steam outlet main hole 612, a third water outlet main hole 613 and a third water inlet main hole 614 that are transparent from front to back; the front end surface of the hydraulic drive plate 61 is provided with a cylindrical cavity with an opening facing forward, and a hole is provided in the center of the bottom of the cylindrical cavity; the bottom of the cylindrical cavity also has a transparent first drive hole 6161 and a second drive hole 6162; a partition plate 619, a right stopper 6171 and a left stopper 6172 are also radially fixedly provided in the cylindrical cavity, and the left stopper The right stopper 6172 and the right stopper 6171 are respectively located on the left and right sides of the partition plate 619; the rotary piston assembly 62 includes an axis and a rotary piston 622, the front end of the axis of the rotary piston assembly 62 is the piston front clutch 621, the axis of the rotary piston assembly 62 is connected to the hole in the center of the bottom of the cylindrical cavity of the hydraulic drive plate 61 through a rotating pair, the front end of the hydraulic drive plate 61 is pressed and sealed with the rear end face of the last water plate 1 or steam plate 2; the piston front clutch 621 is engaged with the rear end clutch 44 of the last sweeper 4; the front end of the third steam inlet main hole 611 is connected to the rear end of the steam inlet main hole; the front end of the third steam outlet main hole 612 is connected to the rear end of the steam outlet main hole; the front end of the third water outlet main hole 613 is connected to the rear end of the water outlet main hole The front end is connected; the front end of the third water inlet main hole 614 is connected to the rear end of the water inlet main hole; the cylindrical cavity on the front end surface of the hydraulic drive plate 61 and the rear end surface of the water plate 1 or the steam plate 2 form a sealed chamber, and the rotary piston 622 and the partition plate 619 together divide the sealed chamber into two mutually isolated parts, namely the first cavity 631 and the second cavity 632, the first drive hole 6161 is connected to the first cavity 631, and the second drive hole 6162 is connected to the second cavity 632; high-pressure water is introduced into the first cavity 631 through the first drive hole 6161, and the high-pressure water drives the rotary piston 622 to rotate, so that the volume of the first cavity 631 becomes larger, and the second cavity 632 becomes smaller, and the water in the second cavity 632 is squeezed through The water in the first cavity 631 is squeezed and flows out through the first driving hole 6161; until the rotating piston 622 is blocked by the left stopper 6172 and stops rotating; high-pressure water is introduced into the second cavity 632 through the second driving hole 6162, and the high-pressure water drives the rotating piston 622 to rotate, thereby increasing the volume of the second cavity 632 and reducing the first cavity 631, and the water in the first cavity 631 is squeezed and flows out through the first driving hole 6161; until the rotating piston 622 is blocked by the left stopper 6172 and stops rotating; in this way, high-pressure water is alternately introduced into the first driving hole 6161 and the second driving hole 6162, so as to drive the rotating piston 622 to swing back and forth, and the rotating piston assembly 62 drives all the sweepers 4 to rotate, thereby achieving the purpose of automatic cleaning of the sweeper 4.

[0049] It also includes a three-position four-way solenoid valve 100, wherein the solenoid valve A working port 100A of the three-position four-way solenoid valve 100 is connected to the first drive hole 6161; the solenoid valve B working port 100B of the three-position four-way solenoid valve 100 is connected to the second drive hole 6162; and the water source working port 100P is connected to the pressure water source.

[0050] The return port 100T flows into the third water inlet main hole 614, so that the pressurized water drives the sweeper 4 to rotate and then participates in heat exchange and is reused without wasting water.

[0051] Other structures, functions and beneficial effects not mentioned are the same as those in Example 1.

[0052] Example 3, a plate heat exchanger capable of automatic cleaning for washing fluorine with high-purity niobium oxide, such as Figure 10-12 As shown, compared with the embodiment 1, the driving device thereof does not use a motor, but uses an electromagnetic driving assembly 7; the electromagnetic driving assembly 7 includes an electromagnetic driving plate 71, an electromagnetic driving bar 72 and a semi-annular electromagnet 73; a hole is provided in the center of the electromagnetic driving plate 71;

[0053] The electromagnetic drive bar 72 includes an axis and an electromagnetic swing arm 722. The first end of the electromagnetic swing arm 722 is fixedly connected to the axis of the electromagnetic drive bar 72. The second end of the electromagnetic swing arm 722 is fixedly connected to a permanent magnet 723. The axis of the electromagnetic drive bar 72 and the hole of the electromagnetic drive plate 71 are combined into a rotating pair. The front end of the axis of the electromagnetic drive bar 72 is provided with an electromagnetic front clutch 721. The semi-annular electromagnet 73 is fixedly connected to the electromagnetic drive plate 71. The semi-annular electromagnet 73 includes a semi-annular iron core 732 and a coil 731. The coil 731 is wound around the iron core 732. The electromagnetic drive plate 71 It is fixedly connected to the last water-passing plate 1 or steam-passing plate 2, and the electromagnetic front clutch 721 is engaged with the rear clutch 44 of the last sweeper 4; a positive current is passed through the coil 731, and the semi-annular electromagnet 73 generates a magnetic field, which drives the electromagnetic drive bar 72 to swing forward through the permanent magnet 723, and the electromagnetic front clutch 721 drives all the sweepers 4 to swing. A reverse current is passed through the coil 731, and the permanent magnet 723 drives the electromagnetic drive bar 72 to swing reversely. By alternately changing the direction of the current, the sweeper 4 can be driven to swing forward and reverse, thereby achieving the purpose of automatic cleaning.

[0054] Other structures, functions and beneficial effects not mentioned are the same as those in Example 1.

[0055] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two elements, or direct connection. "Front", "rear", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0056] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0057] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plate heat exchanger capable of automatic cleaning for washing fluorine from high-purity niobium oxide, comprising a plurality of water-passing plates, a plurality of steam-passing plates and a front sealing plate; the water-passing plates and the steam-passing plates each have a flat front end face and a rear end face, the front end faces each have a cavity opening forward, and the front sealing plate has a flat rear end face; the cavity of the water-passing plates is a first cavity, and the cavity of the steam-passing plates is a second cavity; the plurality of water-passing plates and the plurality of steam-passing plates are alternately arranged front and back, the front end face of the water-passing plates is sealed and pressed against the rear end face of the steam-passing plates adjacent to the front, and the first cavity of the water-passing plates and the rear end face of the steam-passing plates form a cavity; A sealed space; the front end face of the steam passing plate is sealed and pressed against the rear end face of the water passing plate adjacent to the front, and the second cavity of the steam passing plate and the rear end face of the water passing plate form a sealed space; the water passing plate is provided with a first water inlet main hole that is transparent from front to back; the steam passing plate is provided with a second water inlet main hole that is transparent from front to back; all the first water inlet main holes and the second water inlet main holes are aligned from front to back to form the water inlet main holes; the water passing plate is also provided with a water inlet branch hole, which connects the first water inlet main hole and the first cavity in the water passing plate; the front end of the water inlet main hole is sealed and blocked by the rear end face of the front sealing plate; Features: The first cavity and the second cavity are cylindrical cavities; a through hole is provided at the bottom center of the cylindrical cavity; it also includes multiple sweepers; the sweeper includes four sweeping plates and an intermediate shaft, and one end of the four sweeping plates is fixedly connected to the intermediate shaft respectively; a front end clutch is provided at the front end of the intermediate shaft; a rear end clutch is provided at the rear end of the intermediate shaft; the sweeper and the water pass plate are assembled together, and the intermediate shaft of the sweeper and the through hole in the bottom center of the cylindrical cavity are sealed to form a rotating pair; the sweeper and the steam pass plate are assembled together, and the intermediate shaft of the sweeper and the through hole in the bottom center of the cylindrical cavity are sealed to form a rotating pair; the four sweeping plates divide the cylindrical cavity into four sub-cavities, and a connecting hole is provided on the sweeping plate, and the connecting hole connects two adjacent sub-cavities; the intermediate shafts of all sweepers are arranged front and back on an axis, and the front end clutch and the rear end clutch of two adjacent sweepers are engaged.

2. The plate heat exchanger capable of automatic cleaning for washing fluorine from high-purity niobium oxide according to claim 1, characterized in that: The rear end clutch of the last sweeper is connected to the driving device.

3. The plate heat exchanger capable of automatic cleaning for washing fluorine from high-purity niobium oxide according to claim 2, characterized in that: The driving device is a motor, and the output shaft of the motor is connected to a rear intermediate shaft through a clutch.

4. The plate heat exchanger capable of automatic cleaning for washing fluorine from high-purity niobium oxide according to claim 2, characterized in that: The driving device can also be a hydraulic drive plate assembly; the hydraulic drive plate assembly includes a hydraulic drive plate and a rotary piston assembly; the hydraulic drive plate assembly has a flat front end face; the hydraulic drive plate is provided with a third water inlet main hole that is transparent from front to back; the front end face of the hydraulic drive plate is provided with a cylindrical cavity with an opening facing forward, and a hole is provided in the center of the bottom of the cylindrical cavity; the bottom of the cylindrical cavity also has a transparent first drive hole and a second drive hole; a partition plate, a left stopper and a right stopper are also radially fixedly arranged in the cylindrical cavity, and the left stopper and the right stopper are respectively located on the left and right sides of the partition plate; the rotary piston assembly includes a shaft and a rotary piston, and the front end of the shaft of the rotary piston assembly is a piston front clutch The shaft of the rotating piston assembly is connected to the hole in the center of the bottom of the cylindrical cavity of the hydraulic drive plate through a rotating pair, and the front end of the hydraulic drive plate is pressed and sealed with the rear end face of the last water plate or steam plate; the front clutch of the piston is engaged with the rear end clutch of the last sweeper; the front end of the third water inlet main hole is connected with the rear end of the water inlet main hole; the cylindrical cavity on the front end face of the hydraulic drive plate and the rear end face of the water plate or steam plate form a sealed chamber, and the rotating piston and the partition plate together divide the sealed chamber into two isolated parts, which are the first cavity and the second cavity, the first drive hole is connected with the first cavity, and the second drive hole is connected with the second cavity.

5. The plate heat exchanger capable of automatic cleaning for washing fluorine from high-purity niobium oxide according to claim 4, characterized in that: It also includes a three-position four-way solenoid valve, wherein the solenoid valve A working port of the three-position four-way solenoid valve is connected to the first drive hole; the solenoid valve B working port of the three-position four-way solenoid valve is connected to the second drive hole; and the water source working port is connected to the pressure water source.

6. The plate heat exchanger capable of automatic cleaning for washing fluorine from high-purity niobium oxide according to claim 5, characterized in that: The reflux port of the three-position four-way solenoid valve is communicated with the third water inlet main hole.

7. The plate heat exchanger capable of automatic cleaning for washing fluorine from high-purity niobium oxide according to claim 2, characterized in that: The driving device is an electromagnetic driving assembly; the electromagnetic driving assembly includes an electromagnetic driving plate, an electromagnetic driving strip and a semi-annular electromagnet; a hole is provided in the center of the electromagnetic driving plate; the electromagnetic driving strip includes an axis and an electromagnetic swing arm, the first end of the electromagnetic swing arm is fixedly connected to the axis of the electromagnetic driving strip, and the second end of the electromagnetic swing arm is fixedly connected to a permanent magnet; the axis of the electromagnetic driving strip and the hole of the electromagnetic driving plate are combined to form a rotating pair; an electromagnetic front clutch is provided at the front end of the axis of the electromagnetic driving strip; the semi-annular electromagnet is fixedly connected to the electromagnetic driving plate, and the semi-annular electromagnet includes a coil; the electromagnetic driving plate is fixedly connected to the rearmost water plate or steam plate, and the electromagnetic front clutch is engaged with the rear end clutch of the rearmost sweeper; a forward current is passed through the coil, the semi-annular electromagnet generates a magnetic field, and the permanent magnet drives the electromagnetic driving strip to swing forward, and the electromagnetic front clutch drives all the sweepers to swing, and a reverse current is passed through the coil, and the permanent magnet drives the electromagnetic driving strip to swing reversely.

8. The plate heat exchanger capable of automatic cleaning for washing fluorine from high-purity niobium oxide according to claim 7, characterized in that: The semi-annular electromagnet also includes a semi-annular iron core, and the coil is wound around the iron core.

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