A wastewater treatment system and method for preparing methyl ether

Abstract

The present invention discloses a wastewater treatment system and method for preparing methyl ether, including an acidification system, an acidification liquid treatment tank, an adsorption tank, an ozone system and an evaporation desalination tower, wherein a filter screen is provided at the bottom of the acidification liquid treatment tank, a suction filter plate that can move up and down is provided below the filter screen, and a filter press plate that can move up and down is provided above the filter screen, a plurality of penetrating adjustment holes are provided on the filter press plate, and a valve plate that can be opened and closed is provided in the adjustment holes, a discharge pipe is provided at the bottom of the acidification liquid treatment tank, the discharge pipe is connected with the suction filter plate, and a feed pipe is provided on the acidification liquid treatment tank. The present invention integrates filtration, pressure filtration and suction filtration, and combines the three into one, which can fully improve the solid-liquid separation efficiency, reduce the addition of other equipment, reduce costs, and the treatment system has low energy consumption and low costs, while saving occupied area, and has high social use value and application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of methyl ether production, and in particular to a wastewater treatment system and method for methyl ether preparation. Background Art

[0002] In the production process of methyl ether, sodium hydroxide, methanol and nitrochlorobenzene are usually used to react to prepare methyl ether. After the preparation, the methanol is removed by a stripping tower, and then the treated wastewater is subjected to the following steps: water washing, standing, cooling crystallization, filter pressing, acidification, resin adsorption, and brine concentration.

[0003] The inventors found during the production process that the existing process has high energy consumption, high operating costs, and low processing efficiency; and in the production process, a large number of different types of tanks are needed to perform operations such as standing, cooling crystallization, and filter pressing in sequence, which results in the equipment not only occupying a large area and high overall cost, but also having a cumbersome process, which can easily lead to a decrease in overall production efficiency; at the same time, there is no equipment on the market that can combine filtration, filter pressing, and vacuum filtration into one.

[0004] Therefore, in view of this, the inventor, based on his many years of rich experience in design, development and actual production in the relevant industry, has studied and improved the existing structure and deficiencies, and provided a wastewater treatment system and method for methyl ether preparation, in order to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the problems of high processing energy consumption, high operating cost and low processing efficiency in the existing process mentioned in the above background technology, the present invention provides a system and method for treating wastewater for preparing methyl ether.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A wastewater treatment system for preparing methyl ether comprises an acidification system, an acidification liquid treatment tank, an adsorption tank, an ozone system and an evaporation desalination tower, wherein the acidification system, the acidification liquid treatment tank, the adsorption tank, the ozone system and the evaporation desalination tower are connected end to end in sequence through pipelines, a filter screen is provided at the bottom of the acidification liquid treatment tank, a suction filter plate which can move up and down is provided below the filter screen, and a filter press plate which can move up and down is provided above the filter screen, a plurality of penetrating adjustment holes are provided on the filter press plate, and an openable and closable valve plate is provided in the adjustment hole, a discharge pipe is provided at the bottom of the acidification liquid treatment tank, and the discharge pipe is communicated with the suction filter plate, and a feed pipe is provided on the acidification liquid treatment tank.

[0008] Preferably, a rotatable adjusting shaft is provided in the middle of the acidizing liquid treatment tank, the adjusting shaft passes through the middle of the filter press plate, and a first reciprocating thread is provided on the adjusting shaft, a matching filter press ring plate is provided on the outer side of the first reciprocating thread, a through-type connecting hole is provided in the middle of the filter press plate, the outer side of the filter press ring plate is rotatably and sealedly connected to the inner wall of the connecting hole, a limiting mechanism for limiting the rotation of the filter press ring plate is provided in the acidizing liquid treatment tank, and the outer side wall of the filter press plate is slidably and sealedly connected to the inner wall of the acidizing liquid treatment tank.

[0009] Preferably, the limiting mechanism includes a retractable adjusting frame which is sleeved on the outside of the adjusting shaft. There are two adjusting frames, which are symmetrically distributed at the upper and lower ends of the filter press ring plate. One end of the adjusting frame is fixedly connected to the filter press ring plate, and the extending end of the adjusting frame is fixedly connected to the inner wall of the acidifying liquid treatment tank.

[0010] Preferably, the adjustment hole includes a first hole and a second hole, the first hole and the second hole are both inclined, and the inclination directions of the first hole and the second hole are opposite, the valve plate is rotatably arranged at the upper end of the first hole, and the valve plate is rotatably arranged at the bottom of the second hole.

[0011] Preferably, a rotatable suction filter shaft is provided at the bottom of the acidified liquid treatment tank, and the suction filter shaft is arranged at the bottom of the adjusting shaft. The suction filter shaft passes through the middle of the filter screen plate, and the suction filter shaft is rotatably connected to the filter screen plate. A through-type suction filter groove is provided in the middle of the suction filter plate, and a second reciprocating thread is provided on the outer side of the suction filter shaft, and a matching suction filter ring plate is provided on the outer side of the second reciprocating thread. The outer side of the suction filter ring plate is rotatably and sealedly connected to the inner wall of the suction filter groove. The inner wall of the acidified liquid treatment tank located at the adjusting shaft is cylindrical, and the inner wall of the acidified liquid treatment tank located at the suction filter shaft is polygonal prism-shaped. The outer side of the suction filter plate is slidably and sealedly connected to the inner wall of the acidified liquid treatment tank.

[0012] Preferably, a discharge trough is provided at the bottom of the filtration shaft, and a filter pressure hole connected to the discharge trough is provided on the filtration shaft located above the second reciprocating thread, and a one-way valve for liquid discharge is provided in the filter pressure hole. The filtration shaft is also provided with a filtration hole for discharging material after the filtration plate moves downward, one end of the filtration hole is connected to the discharge trough, and the feed end of the filtration hole is arranged on the inner wall of the second reciprocating thread, and the discharge pipe is connected to the discharge trough.

[0013] Preferably, a rotatably connected connecting ring plate is provided on the filtration shaft, the filter mesh plate includes a filter sub-plate, there are multiple filter sub-plates, and the filter sub-plates are rotatably arranged on the outside of the corresponding connecting ring plate, the filtration plate includes a filtration sub-plate, the filtration sub-plate corresponds to the filter sub-plate, and the filtration sub-plate is rotatably arranged on the outside of the filtration ring plate, and a slag discharge hole for material discharge is provided at the bottom of the acidification treatment tank, and a collection trough for material collection is provided below the slag discharge hole.

[0014] Preferably, a plurality of rotatably connected second hydraulic rods are provided at the bottom of the filtration ring plate, and the extending ends of the second hydraulic rods are rotatably connected to the corresponding filtration sub-plates. A top rod is fixedly connected on the filtration sub-plate and used to push the filtration sub-plate to a horizontal state. A fixedly connected and bendable connecting piece is provided on the top rod, and the extending end of the connecting piece is fixedly connected to the corresponding filtration sub-plate. A plurality of retractable third hydraulic rods are provided on the inner wall of the acidified liquid treatment tank and are used to support the filtration sub-plate to maintain a horizontal state.

[0015] A method for treating wastewater for preparing methyl ether comprises the following steps:

[0016] S1 first sends the wastewater into the acidification system for acidification. The acidified liquid is automatically stratified. The material after stratification and oil removal is sent into the acidification liquid treatment tank through the feed pipe. Then the adjusting shaft is rotated to make the filter press plate reciprocate periodically in the tank, and the material in the tank is quickly cooled down at the same time.

[0017] S2 When the temperature drops to the set temperature, stop the adjustment shaft from rotating and open the valve on the discharge pipe. At this time, the liquid in the tank is filtered through the filter screen and discharged into the discharge pipe through the filter press hole. After filtering to a certain extent, start the drive motor. When the filter press plate moves to the highest point with the rotation of the adjustment shaft, the valve plate seals the adjustment hole. During the downward movement of the filter press plate, the material on the filter screen can be fully filtered, and the moisture in the material can be filtered and separated in time until the filter press plate moves to the lowest point.

[0018] S3 rotates the filtration shaft, and through the second reciprocating thread, the filtration plate moves downward, thereby filtering the material on the filter plate, and a one-way valve is provided in the filter press hole, so that the filter press hole will not damage the filtration process; when the filtration plate moves downward to a certain distance, that is, the filtration plate moves to the bottom of the filtration hole, the rotation is stopped at this time, so that the filtrate after filtration enters the discharge pipe through the filtration hole and is discharged, and when the filtrate is completely discharged, the filtration is completed;

[0019] The liquid discharged from S4 through the discharge pipe enters the adsorption tank for adsorption by activated carbon and resin. The phenol content after treatment is within 5ppm, and the activated carbon is replaced regularly. The color of the adsorbed qualified liquid tank is less than 100 times after neutralization.

[0020] The liquid after S5 adsorption is transported to the ozone system through a pipeline, and the wastewater is treated by ozone. The treated wastewater enters the evaporation and desalination tower and can be discharged after desalination.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The design of the filter screen plate, filter press plate and filter suction plate can realize the integration of filtration, filter pressing and filter suction in the acidified liquid treatment tank, so that the acidified liquid treatment tank can be filtered and filtered through the filter press plate after filtration. After the filter pressing is completed, it can be filtered through the filter suction plate. The three are combined into one, which can fully improve the solid-liquid separation efficiency, reduce the addition of other equipment, reduce costs, and the processing system has low energy consumption and low cost, while saving occupied area. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the acidification liquid treatment tank and the adsorption tank of the present invention.

[0025] Figure 2 It is a schematic diagram of the front cross-sectional structure of the acidizing liquid treatment tank of the present invention.

[0026] Figure 3 For the present invention Figure 2 Enlarged structural diagram at A in the middle.

[0027] Figure 4 For the present invention Figure 2 Enlarged structural diagram at B in the middle.

[0028] Figure 5 For the present invention Figure 2 Enlarged structural diagram at point C in the middle.

[0029] Figure 6 It is a schematic diagram of the cross-sectional structure of the filtration shaft, filtration plate and filter screen plate of the present invention.

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the cooling box, filter press plate, filter screen plate and suction filter plate of the present invention.

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the adjustment shaft and the filtration shaft of the present invention.

[0032] Fig. 9 It is a schematic diagram of the cross-sectional connection structure of the limiting rod and the limiting frame of the present invention.

[0033] Fig.10 It is a schematic diagram of the three-dimensional structure of the suction filtration sub-plate and the filtering sub-plate after rotation of the present invention.

[0034] In the figure: 1, acidizing liquid treatment tank; 10, feed pipe; 11, drive motor; 12, discharge pipe; 121, transfer box; 13, collecting tank; 14, adjusting shaft; 141, sleeve; 142, first reciprocating thread; 15, filter press plate; 151, valve plate; 152, first hole; 153, pressing rod; 1531, pressing groove; 1532, stopper; 1533, return spring; 1534, stopper rod; 1535, stopper frame; 154, second hole; 155, filter press ring plate; 1551, water inlet ring groove; 1552, water discharge ring groove; 1553, upper spiral tube; 1554, lower spiral tube; 1555, stopper ring groove; 161, first frame; 162 , second frame; 163, fixed rod; 164, water inlet ring frame; 165, second guide groove; 166, water inlet hole; 167, first guide groove; 17, suction filter shaft; 171, second reciprocating thread; 172, discharge trough; 173, suction filter hole; 174, filter press hole; 175, reflux ring groove; 176, reflux frame; 177, reflux groove; 18, filter screen plate; 181, third hydraulic rod; 182, connecting ring plate; 183, filter sub-plate; 19, suction filter plate; 191, second hydraulic rod; 192, suction filter ring plate; 193, top rod; 194, connecting piece; 195, suction filter sub-plate; 2, cooling box; 21, water inlet pipe; 22, reflux pipe; 3, adsorption tank. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0036] Example 1

[0037] Reference Figure 1-2 A wastewater treatment system for preparing methyl ether comprises an acidification system, an acidification liquid treatment tank 1, an adsorption tank 3, an ozone system and an evaporation desalination tower, wherein the acidification system, the acidification liquid treatment tank 1, the adsorption tank 3, the ozone system and the evaporation desalination tower are connected end to end in sequence through pipelines, a filter screen plate 18 is provided at the bottom of the acidification liquid treatment tank 1, a suction filter plate 19 which can move up and down is provided below the filter screen plate 18, and a filter press plate 15 which can move up and down is provided above the filter screen plate 18, a plurality of penetrating adjustment holes are provided on the filter press plate 15, and a valve plate 151 which can be opened and closed is provided in the adjustment hole, a discharge pipe 12 is provided at the bottom of the acidification liquid treatment tank 1, and the discharge pipe 12 is communicated with the suction filter plate, and a feed pipe 10 is provided on the acidification liquid treatment tank 1.

[0038] Reference Figure 2 and Figure 7-8 The acidified liquid treatment tank 1 is provided with a rotatable adjustment shaft 14 in the middle, the adjustment shaft 14 passes through the middle of the filter press plate 15, and the adjustment shaft 14 is provided with a first reciprocating thread 142, and a matching filter press ring plate 155 is provided on the outer side of the first reciprocating thread 142, and a through-type connection hole is provided in the middle of the filter press plate 15, and the outer side of the filter press ring plate 155 is rotatably and sealedly connected to the inner wall of the connection hole, and a limiting mechanism for limiting the rotation of the filter press ring plate 155 is provided in the acidified liquid treatment tank 1, and the outer side wall of the filter press plate 15 is slidably and sealedly connected to the inner wall of the acidified liquid treatment tank 1. The upper end of the acidified liquid treatment tank 1 is provided with a driving motor 11, and the output end of the driving motor 11 is connected to the adjustment shaft 14.

[0039] Furthermore, the limiting mechanism includes a retractable adjustment frame sleeved on the outside of the adjustment shaft 14, and the number of the adjustment frames is two, and the adjustment frames are symmetrically distributed at the upper and lower ends of the filter press ring plate 155, one end of the adjustment frame is fixedly connected to the filter press ring plate 155, and the extended end of the adjustment frame is fixedly connected to the inner wall of the acidizing liquid treatment tank 1. Among them, the upper end of the adjustment frame located above the filter press ring plate 155 is provided with a plurality of fixing rods 163, and the fixing rods 163 are fixedly connected to the inner wall of the acidizing liquid treatment tank 1. Among them, the adjustment frame is in the shape of a polygonal prism.

[0040] Further, the adjustment hole includes a first hole 152 and a second hole 154, the first hole 152 and the second hole 154 are both inclined, and the inclination directions of the first hole 152 and the second hole 154 are opposite, the valve plate 151 is rotatably arranged at the upper end of the first hole 152, and the valve plate 151 is rotatably arranged at the bottom of the second hole 154. One end of the valve plate 151 is rotatably connected to the corresponding first hole 152 and one side of the second hole 154 through a rotating shaft, and a torsion spring for driving the valve plate 151 to automatically rotate and close is provided on the rotating shaft.

[0041] Reference Fig. 9A fixedly connected limit frame 1535 is provided on the valve plate 151 at the upper end of the first hole 152, a retractable limit rod 1534 for engaging the limit frame 1535 is provided on one side wall of the first hole 152, a limit groove is provided on the side wall of the first hole 152, the limit rod 1534 is slidably connected in the limit groove, a return spring 1533 is provided in the limit groove for driving the limit rod 1534 to automatically pop out, and a fixedly connected and bendable limit member 1532 is provided in the limit groove, and the extension end of the limit member 1532 is fixedly connected to the limit rod 1534 The filter press plate 15 is provided with a pressing groove 1531 connected to the limit groove, and a pressing rod 153 is provided in the pressing groove for sliding connection and used for squeezing the limit member 1532. The pressing rod 153 adopts the pressing and telescopic mechanism in the existing field of press-type ballpoint pens, and the pressing end is arranged at the upper end of the filter press plate 15. After pressing, the telescopic end is connected to the limit member 1532. The acidified liquid treatment tank 1 is provided with a pressing plate that can move up and down and squeeze the pressing rod 153. A plurality of first hydraulic rods that are fixedly connected are provided at the upper end of the pressing plate, and the extending end of the first hydraulic rod is fixedly connected to the fixing rod 163.

[0042] In the present embodiment, the addition of the adjustment frame can effectively prevent the liquid from leaking out through the connection of the first reciprocating thread 142, thereby ensuring the sealing of the filter press plate 15 during filtration. At the same time, the adjustment frame can effectively prevent the rotation of the filter press ring plate 155, so that the filter press ring plate 155 can only move up and down. The rotation of the adjustment shaft 14 can make the filter press ring plate 155 reciprocate up and down periodically through the characteristics of the reciprocating thread and the limitation of the adjustment frame. The adjustment hole is divided into a first hole 152 and a second hole 154, and the first hole 152 and the second hole 154 are set to be inclined in opposite directions. In addition, the valve plate 151 is openable and closable, and the filter press plate 15 and the filter press ring plate 155 are rotatably connected. When the filter press plate 15 moves up and down, water flows through the first hole 152 or the second hole 154 and can be discharged in an inclined state. When the filter press plate 15 moves downward , the valve plate 151 seals the second hole 154, and the water flow can only pass through the first hole 152. The reaction force can push the filter press plate 15 to rotate. On the contrary, during the upward movement of the filter press plate 15, the valve plate 151 seals the first hole 152, and the water flow can only pass through the second hole 154. The reaction force can push the filter press plate 15 to rotate in the opposite direction. The rotation of the filter press plate 15 can make the solution in the acidified liquid treatment tank 1 more fully mixed. When pressure filtration is needed, it is only necessary to start the first hydraulic rod to drive the pressure plate to move downward when the filter press plate 15 moves above the liquid level, and use the pressure plate to press the pressing rod 153 to make the limit rod 1534 and the limit frame 1535 engage and fix. At this time, the valve plate 151 is closed at the same time. At this time, the filter press plate 15 can form a sealed plate, and continue to move the filter press plate 15 downward by rotating the adjusting shaft 14, so that the liquid in the tank can be pressure filtered and separated.

[0043] Example 2

[0044] The same points as Example 1 are not described here, but the differences from Example 1 are as follows:

[0045] Reference Figure 2 and Figure 6 A rotatable suction filter shaft 17 is provided at the bottom of the acidified liquid treatment tank 1, and the suction filter shaft 17 is arranged at the bottom of the adjusting shaft 14. The suction filter shaft 17 passes through the middle of the filter screen plate 18, and the suction filter shaft 17 is rotatably connected to the filter screen plate 18. A through-type suction filter groove is provided in the middle of the suction filter plate 19, and a second reciprocating thread 171 is provided on the outer side of the suction filter shaft 17, and a matching suction filter ring plate 192 is provided on the outer side of the second reciprocating thread 171. The outer side of the suction filter ring plate 192 is rotatably and sealedly connected to the inner wall of the suction filter groove. The inner wall of the acidified liquid treatment tank 1 located at the adjusting shaft 14 is cylindrical, and the inner wall of the acidified liquid treatment tank 1 located at the suction filter shaft 17 is polygonal prism-shaped. The outer side of the suction filter plate 19 slides and is sealedly connected to the inner wall of the acidified liquid treatment tank 1.

[0046] The polygonal prism design can effectively prevent the filter plate 19 from rotating, so that the filter plate 19 can only move up and down. The second reciprocating thread 171 is used to realize the periodic up and down movement of the filter plate 19, thereby achieving the effect of filtration.

[0047] Reference Figure 7 In this embodiment, a discharge groove 172 is provided at the bottom of the filtration shaft 17, and a filter pressure hole 174 connected to the discharge groove 172 is provided on the filtration shaft 17 located above the second reciprocating thread 171. A one-way valve for liquid discharge is provided in the filter pressure hole 174. The filtration shaft 17 is also provided with a filtration hole 173 for discharging the material after the filtration plate 19 moves downward. One end of the filtration hole 173 is connected to the discharge groove 172, and the feed end of the filtration hole 173 is arranged on the inner wall of the second reciprocating thread 171, and the discharge pipe 12 is connected to the discharge groove 172.

[0048] In this embodiment, when filtering is required, the control valve on the discharge pipe 12 is opened. At this time, the liquid in the acidified liquid treatment tank 1 is first filtered through the filter screen 18, and then enters the discharge trough 172 through the filter pressure hole 174, and then is discharged through the discharge pipe 12, and then moves downward through the filter pressure plate 15 to perform pressure filtration separation. After the pressure filtration, the filter shaft 17 is rotated to move the filter plate 19 downward, and the negative pressure formed by the filter plate 19 is used to filter the material on the upper end of the filter screen plate 18. When the filter plate 19 moves to the filter hole 173, the filtration is completed. At this time, the liquid above the filter plate 19 enters the discharge trough 172 through the filter hole 173, and the filtered liquid is automatically discharged through the discharge pipe 12, realizing automatic filtration. After the filtration is completed, the filter plate 19 can automatically restore its initial position through the second reciprocating thread 171, waiting for the next filtration.

[0049] Example 3

[0050] The same points as Example 2 are not described here, but the differences from Example 2 are as follows:

[0051] Reference Figure 2 A sleeve 141 is provided on the outside of the adjusting shaft 14 for one-way rotation connection, and the first reciprocating thread 142 is arranged on the outside of the sleeve 141. The bottom of the adjusting shaft 14 is connected to the filtration shaft 17 for one-way rotation. When the adjusting shaft 14 drives the sleeve 141 to rotate, the filtration shaft 17 does not rotate. When the adjusting shaft 14 rotates in the opposite direction, driving the filtration shaft 17 to rotate, the sleeve 141 does not rotate, and it rotates in one direction, and is connected in a ratchet manner.

[0052] With this design, the drive motor 11 can first rotate forward to drive the sleeve 141 to rotate, so that the filter plate 15 moves up and down, or the filter plate 15 performs downward filtering. After the filtering is completed, the drive motor 11 can rotate in the reverse direction to drive the filter shaft 17 to rotate. At this time, the sleeve 141 does not rotate, and the rotation of the filter shaft 17 can drive the filter plate 19 to perform periodic reciprocating motion for filtering.

[0053] Example 4

[0054] The same points as Example 2 are not described here, but the differences from Example 2 are as follows:

[0055] Reference Figure 6 and Fig.10In this embodiment, a rotatably connected connecting ring plate 182 is provided on the filtration shaft 17, the filter screen plate 18 includes a filter sub-plate 183, there are multiple filter sub-plates 183, and the filter sub-plates 183 are rotatably arranged on the outside of the corresponding connecting ring plate 182, the filtration plate 19 includes a filtration sub-plate 195, the filtration sub-plate 195 corresponds to the filtration sub-plate 183, and the filtration sub-plate 195 is rotatably arranged on the outside of the filtration ring plate 192, and a slag discharge hole for material discharge is provided at the bottom of the acidification treatment tank 1, and a collection trough 13 for material collection is provided below the slag discharge hole.

[0056] In this embodiment, a plurality of rotatably connected second hydraulic rods 191 are provided at the bottom of the filtration ring plate 192, and the extending ends of the second hydraulic rods 191 are rotatably connected to the corresponding filtration sub-plates 195. The filtration sub-plates 195 are provided with a top rod 193 which is fixedly connected and used to push the filtration sub-plate 183 to a horizontal state. The top rod 193 is provided with a fixedly connected and bendable connecting member 194, and the extending end of the connecting member 194 is fixedly connected to the corresponding filtration sub-plate 183. The inner wall of the acidified liquid treatment tank 1 is provided with a plurality of retractable third hydraulic rods 181 which are used to support the filtration sub-plate 183 to maintain a horizontal state.

[0057] In this embodiment, when the filtration is completed, the second hydraulic rod 191 can be used to drive the filtration plate 195 to rotate downward. In order to make all the filtration plates 195 rotate, multiple filtration plates 195 can be rotated and tilted at different angles. At the same time, the third hydraulic rod 181 is contracted to release the limit of the filter plate 183. At this time, the transmission of the connecting member 194 can drive the filter plate 183 to tilt at the same angle, so that the material on the filter plate 183 automatically falls off, is discharged through the slag discharge hole, and is collected by the collection tank 13. The design of the connecting member 194 makes the filtration plate After the filter plate 19 moves downward for a certain distance (i.e. after the filter plate 19 completes the filtration), the connecting piece 194 is in a tensioned state. At this time, the rotation of the filter plate 195 can drive the corresponding filter plate 183 to rotate synchronously. When the impurities are discharged, the filter plate 19 is driven to move upward to the initial position through the rotation of the filter shaft 17, and then the second hydraulic rod 191 is used to restore the filter plate 195 to the initial position one after another to form the filter plate 19. When the filter plate 195 restores to a horizontal state, the push rod 193 can synchronously push the corresponding filter plate 183 to a horizontal state, thereby realizing the automatic restoration of the filter plate 183.

[0058] Example 5

[0059] The same points as Example 1 are not described again, and the difference from Example 1 is that:

[0060] Reference Figure 1-5 and Figure 7A cooling box 2 is provided on one side of the acidified liquid treatment tank 1. Cooling liquid is stored in the cooling box 2. A delivery pump for driving the delivery of the cooling liquid is provided in the cooling box 2. A delivery pipe is provided at the output end of the delivery pump. A cooling pipe is provided on the filter press plate 15. The cooling pipes are evenly arranged on the upper and lower sides of the filter press plate 15. The extended end of the delivery pipe is connected to the water inlet end of the cooling pipe. A reflux pipe 22 is also provided on the cooling box 2. The water inlet end of the reflux pipe 22 is connected to the drainage end of the cooling pipe.

[0061] Further, the cooling pipe includes an upper spiral pipe 1553 and a lower spiral pipe 1554, both of which are spirally arranged inside the filter press plate 15, and the upper spiral pipe 1553 and the lower spiral pipe 1554 pass through corresponding adjustment holes respectively, and a connecting transfer pipe is arranged outside the upper spiral pipe 1553, and the extending end of the transfer pipe is connected to the lower spiral pipe 1554. The upper spiral pipe 1553 and the lower spiral pipe 1554 are arranged between the valve plates 151.

[0062] Furthermore, a limiting ring groove 1555 is provided on the outer side of the filter press ring plate 155, and the limiting ring groove 1555 is rotatably and sealingly connected to the connecting hole.

[0063] Further, the regulating frame includes a first frame 161 and a second frame 162, the second frame 162 is provided with a first guide groove 167, the first frame 161 is slidably and sealedly connected in the first guide groove 167, the inner wall of the connecting hole is provided with an upper guide pipe connected to the water inlet end of the upper spiral tube 1553, the outer wall of the filter press ring plate 155 is provided with a water inlet annular groove 1551 connected to the water inlet end of the upper guide pipe, the bottom of the first guide groove 167 is connected to the water inlet annular groove 1551, and the inner wall of the connecting hole is also provided with a lower spiral tube 1553. The lower guide pipe is connected to the water outlet end of the spiral tube 1554, the outer wall of the filter press ring plate 155 is provided with a drainage ring groove 1552 connected to the drainage end of the lower guide pipe, the first guide groove 167 located below the filter press ring plate 155 is connected to the drainage ring groove 1552, the first frame 161 is provided with a second guide groove 165 connected to the first guide groove 167, the extended end of the water inlet pipe 21 is fixedly connected to the first frame 161 located above the filter press ring plate 155, and the water inlet pipe 21 is connected to the corresponding second guide groove 165. Among them, the end of the first frame 161 located above the filter press plate 15 is provided with a fixedly connected water inlet ring frame 164, the second guide groove 165 is provided with a plurality of water inlet holes 166 connected to the water inlet ring frame 164, and the water inlet pipe 21 is connected to the water inlet ring frame 164.

[0064] Among them, the end of the second frame 162 is fixedly connected to the corresponding filter ring plate 155, the fixing rod 163 is fixedly connected to the corresponding first frame 161, the first frame 161 located below is rotatably and sealedly connected to the filtration shaft 17, the filtration shaft 17 is provided with a reflux ring groove 175 connected to the second guide groove 165, and the filtration shaft 17 is provided with a reflux groove 177 connected to the reflux ring groove 175, the bottom of the filtration shaft 17 is provided with a reflux frame 176 which is sleeved on the outside of the filtration shaft 17 and rotatably and sealedly connected, the outer wall of the reflux groove 177 is provided with a connected reflux hole, and the reflux pipe 22 is fixedly connected and communicated with the reflux frame 176.

[0065] In this embodiment, the design of the cooling box 2, the coolant, and the cooling pipe can continuously pass the coolant through the cooling pipe through the delivery pump. This design allows the water to flow through the adjusting hole during the up and down movement of the filter press plate 15, so that the cooling pipe can be in contact with the liquid more fully, thereby better cooling the liquid and making the cooling of the tank liquid more uniform and rapid.

[0066] The regulating frame is set as the first frame 161 and the second frame 162, and the first guide groove 167 and the second guide groove 165 are set inside, and the coolant delivered by the delivery pump enters the second guide groove 165 located inside the first frame 161 above through the water inlet pipe 21, enters the first guide groove 167 through the second guide groove 165, and then enters the water inlet ring groove 1551, and then enters the upper spiral pipe 1553 through the upper guide pipe. Then, it passes through the transfer tube and enters the lower spiral tube 1554, then enters the guide ring groove through the lower guide pipe, and then enters the second guide groove 165 and the first guide groove 167 below, and finally enters the reflux groove 177 through the reflux ring groove 175, and then enters the reflux frame 176 through the reflux hole, and refluxes to the cooling box 2 through the reflux pipe 22, thereby realizing the circulation of the coolant in the cooling pipe, and enabling the cooling pipe to move up and down synchronously and rotate when cooling, so that the cooling of the liquid is more rapid and uniform.

[0067] In this application, when the acidified liquid treatment tank 1 is processing the material:

[0068] First, the wastewater is sent to the acidification system for acidification. The acidified liquid is automatically stratified. The material after stratification and oil removal is sent to the acidification liquid treatment tank 1 through the feed pipe 10. Then the drive motor 11 is started to drive the adjustment shaft 14 to rotate, so that the filter press plate 15 reciprocates periodically in the tank. At the same time, the delivery pump is started to deliver the coolant to the cooling pipe, and a cycle is formed, so that the cooling pipe can quickly cool the material in the tank.

[0069] When the temperature drops to the set temperature, the drive motor 11 is turned off and the valve on the discharge pipe 12 is opened. At this time, the liquid in the tank is filtered through the filter screen 18 and discharged into the discharge pipe 12 through the filter hole 174. After filtering to a certain extent, the drive motor 11 is started, and the first hydraulic rod is started at the same time to drive the pressing plate to move downward. When the filter plate 15 moves to the highest point with the rotation of the adjusting shaft 14, the pressing plate automatically presses the pressing rod 153 (before the pressing rod 153 is pressed, the valve plate 151 has automatically rotated and closed under the action of the torsion spring to adjust the pressure of the adjusting shaft 14). After pressing, the telescopic mechanism is pressed to release the limiter 1532, which automatically pops out under the action of the reset spring 1533, so that the limiter rod 1534 is inserted into the limiter frame 1535, and the valve plate 151 in the first hole 152 can be clamped and fixed. At this time, the valve plate 151 below the second hole 154 has been rotated and closed. The filter press plate 15 can effectively prevent gas leakage during the downward movement, so that the material on the filter screen plate 18 can be fully filtered, and the moisture in the material can be filtered and separated in time until the filter press plate 15 moves to the lowest point;

[0070] At this time, the driving motor 11 is rotated in the direction to drive the filter shaft 17 to rotate, and the filter plate 19 is moved downward through the second reciprocating thread 171, so that the material on the filter screen plate 18 is filtered (the valve plate 151 at the bottom of the second hole 154 is not completely fixed and closed, and filtering can be performed at this time), and a one-way valve is provided in the filter pressure hole 174, and the filter pressure hole 174 will not destroy the filtration process at this time;

[0071] When the filter plate 19 moves downward to a certain distance (moves to the lowest point of the filter plate 19), that is, the filter plate 19 moves below the filter hole 173, at this time, the driving motor 11 is stopped, so that the filtrate after filtration passes through the filter hole 173 into the discharge pipe 12 for discharge. When the filtrate is completely discharged, the filtration is completed;

[0072] At this time, the third hydraulic rod 181 is retracted to release the fixation of the filter sub-plate 183, and then the second hydraulic rod 191 is started to drive the multiple suction filter sub-plates 195 to rotate downward at different angles in sequence to form an inclined state (at this time, the connecting member 194 is in a tensioned state). The rotation of the suction filter sub-plate 195 can drive the filter sub-plate 183 to rotate downward synchronously to form an inclined state. The impurities on the filter sub-plate 183 automatically fall as the filter sub-plate 183 tilts, and fall into the collecting tank 13 through the slag discharge hole, thereby realizing the automatic separation of impurities. A vibrator can be provided at the bottom of the suction filter sub-plate 195 to separate the impurities on the filter sub-plate 183 faster through vibration.

[0073] After the impurities are separated, the driving motor 11 is first started to drive the filter plate 19 to move to the initial position, and then the second hydraulic rod 191 is sequentially extended to make the filter plates 195 restore to the initial position one after another to form the filter plate 19. When the filter plates 195 restore to the horizontal state, the push rod 193 can synchronously push the corresponding filter plates 183 to the horizontal state, thereby realizing the automatic restoration of the filter plates 183. At this time, the third hydraulic rod 181 is started to move to the bottom of the filter plates 183 for limit fixing;

[0074] The liquid discharged through the discharge pipe 12 enters the transfer box 121, and is transported to the adsorption tank 3 through the transfer box 121 for adsorption by activated carbon and resin. The phenol content after treatment is within 5ppm, and the activated carbon is replaced regularly; the color of the adsorbed qualified liquid tank after neutralization reaches less than 100 times;

[0075] The adsorbed liquid is transported to the ozone system through a pipeline, and the wastewater is treated by ozone. The treated wastewater enters the evaporation and desalination tower and can be discharged after desalination.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0077] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0079] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wastewater treatment system for the preparation of methyl ether, comprising an acidification system, an acidification liquid treatment tank (1), an adsorption tank (3), an ozone system and an evaporation desalination tower, wherein the acidification system, the acidification liquid treatment tank (1), the adsorption tank (3), the ozone system and the evaporation desalination tower are connected end to end in sequence through pipelines, and characterized in that: A filter screen plate (18) is provided at the bottom of the acidified liquid treatment tank (1), a suction filter plate (19) that can move up and down is provided below the filter screen plate (18), and a filter press plate (15) that can move up and down is provided above the filter screen plate (18), the filter press plate (15) is provided with a plurality of penetrating adjustment holes, and an openable and closable valve plate (151) is provided in the adjustment holes, a discharge pipe (12) is provided at the bottom of the acidified liquid treatment tank (1), the discharge pipe (12) is communicated with the suction filter plate (19), and a feed pipe (10) is provided on the acidified liquid treatment tank (1); A rotatable adjustment shaft (14) is provided in the middle of the acidizing liquid treatment tank (1), the adjustment shaft (14) passes through the middle of the filter press plate (15), and a first reciprocating thread (142) is provided on the adjustment shaft (14), a filter press ring plate (155) matched and connected is provided on the outer side of the first reciprocating thread (142), a through-type connecting hole is provided in the middle of the filter press plate (15), the outer side of the filter press ring plate (155) is rotatably and sealingly connected to the inner wall of the connecting hole, and a limiting mechanism for limiting the rotation of the filter press ring plate (155) is provided in the acidizing liquid treatment tank (1); The limiting mechanism comprises a retractable adjustment frame sleeved on the outside of the adjustment shaft (14), the adjustment frame being symmetrically distributed at the upper and lower ends of the filter press ring plate (155), one end of the adjustment frame being fixedly connected to the filter press ring plate (155), and an extended end of the adjustment frame being fixedly connected to the inner wall of the acidified liquid treatment tank (1).

2. A wastewater treatment system for preparing methyl ether according to claim 1, characterized in that: The regulating hole comprises a first hole (152) and a second hole (154); the first hole (152) and the second hole (154) are both inclined and have opposite inclination directions; and the valve plate (151) is rotatably arranged at the upper end of the first hole (152) and the bottom of the second hole (154).

3. A wastewater treatment system for preparing methyl ether according to claim 2, characterized in that: A rotatable suction filtration shaft (17) is provided at the bottom of the acidified liquid treatment tank (1), the suction filtration shaft (17) passes through the middle of the filter screen plate (18), a through-type suction filtration groove is provided in the middle of the suction filtration plate (19), a second reciprocating thread (171) is provided on the outside of the suction filtration shaft (17), and a matching suction filtration ring plate (192) is provided on the outside of the second reciprocating thread (171).

4. A wastewater treatment system for preparing methyl ether according to claim 3, characterized in that: A discharge trough (172) is provided at the bottom of the suction filtration shaft (17), and a filter press hole (174) connected to the discharge trough (172) is provided on the suction filtration shaft (17) located above the second reciprocating thread (171). The suction filtration shaft (17) is also provided with a suction filtration hole (173) for discharging material after the suction filtration plate (19) moves downward, and one end of the suction filtration hole (173) is connected to the discharge trough (172), and a feed end of the suction filtration hole (173) is arranged on the inner wall of the second reciprocating thread (171).

5. A wastewater treatment system for preparing methyl ether according to claim 4, characterized in that: The suction filter shaft (17) is provided with a rotatably connected connecting ring plate (182), the filter screen plate (18) includes a filter sub-plate (183), and the filter sub-plate (183) is rotatably arranged outside the corresponding connecting ring plate (182), the suction filter plate (19) includes a filter sub-plate (195), and the filter sub-plate (195) is rotatably arranged outside the suction filter ring plate (192), and a slag discharge hole for material discharge is provided at the bottom of the acidification treatment tank, and a collection tank (13) for collecting material is provided below the slag discharge hole.

6. A wastewater treatment system for preparing methyl ether according to claim 5, characterized in that: A plurality of rotatably connected second hydraulic rods (191) are provided at the bottom of the suction filter ring plate (192); the extending ends of the second hydraulic rods (191) are rotatably connected to corresponding suction filter sub-plates (195); a top rod (193) fixedly connected and used to push the filter sub-plate (183) up to a horizontal state is provided on the suction filter sub-plate (195); a fixedly connected and bendable connecting piece (194) is provided on the top rod (193); and a plurality of retractable third hydraulic rods (181) are provided on the inner wall of the acidified liquid treatment tank (1) and used to support the filter sub-plate (183) to maintain a horizontal state.

7. A method for treating wastewater from the preparation of methyl ether, using the system for treating wastewater from the preparation of methyl ether as claimed in claim 6, characterized in that: The following steps are involved: S1 first feeds the wastewater into the acidification system for acidification, and the acidified liquid is automatically stratified. The material after stratification and oil removal is fed into the acidification liquid treatment tank (1) through the feed pipe (10), and then the adjustment shaft (14) is rotated to make the filter press plate (15) reciprocate periodically in the tank, and at the same time, the material in the tank is rapidly cooled; S2: When the temperature drops to the set temperature, the adjustment shaft (14) stops rotating and the valve on the discharge pipe (12) is opened. At this time, the liquid in the tank is filtered through the filter screen (18) and discharged into the discharge pipe (12) through the filter hole (174). After filtering to a certain extent, the drive motor (11) is started. When the filter plate (15) moves to the highest point as the adjustment shaft (14) rotates, the valve plate (151) seals the adjustment hole. During the downward movement of the filter plate (15), the material on the filter screen (18) can be fully filtered, and the water in the material can be filtered and separated in time until the filter plate (15) moves to the lowest point. S3 rotates the filtration shaft (17) and moves the filtration plate (19) downward through the second reciprocating thread (171), thereby filtering the material on the filter screen plate (18). A one-way valve is provided in the filter press hole (174), and the filter press hole (174) does not disrupt the filtration process. When the filtration plate (19) moves downward to a certain distance, that is, the filtration plate (19) moves below the filtration hole (173), the rotation is stopped, so that the filtrate after filtration passes through the filtration hole (173) and enters the discharge pipe (12) for discharge. When the filtrate is completely discharged, the filtration is completed. The liquid discharged from S4 through the discharge pipe (12) enters the adsorption tank (3) for adsorption by activated carbon and resin. After treatment, the phenol content is within 5 ppm, and the activated carbon is replaced regularly. The liquid after S5 adsorption is transported to the ozone system through a pipeline, and the wastewater is treated by ozone. The treated wastewater enters the evaporation and desalination tower and can be discharged after desalination.

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