A methanol recovery system for saccharin production wastewater

Abstract

The application relates to a methanol recovery system for saccharin production wastewater, and belongs to the technical field of chemical equipment, which comprises a methanol tower body, the methanol tower body comprises a filler layer for adsorbing methanol and ammonia, the filler layer comprises a plurality of partitions fixed in the methanol tower body, a plurality of maintenance bins are arranged on the side wall of the methanol tower body in an integrated mode, the maintenance bins are in one-to-one correspondence with the partitions, a bin door detachably connected to the maintenance bin is arranged on the maintenance bin, the partitions are arranged along the height direction of the methanol tower body, a plurality of mounting rings for placing fillers are arranged on the partitions, mounting grooves connected in a head-tail mode are arranged on the partitions, a connecting belt connected in a head-tail mode is arranged in the mounting grooves, a driving assembly for driving the connecting belt to transmit in the partition is arranged on the partition, and a plurality of fixing mechanisms for fixing the mounting rings are fixed to the connecting belt. The application has the effect of improving the replacement efficiency of the fillers in the methanol recovery tower.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical equipment, and in particular to a methanol recovery system for saccharin production wastewater. BACKGROUND

[0002] In the production of saccharin, methanol in wastewater needs to be recovered, and in order to improve the amount and quality of self-produced methanol and effectively reduce the ammonia content, a methanol recovery tower is usually used to extract methanol, and then an ammonia gas absorption device is used to treat the ammonia gas in the methanol.

[0003] The methanol recovery tower in the related art generally adsorbs methanol molecules in waste gas or wastewater on the surface of the packing by making the material contact the packing layer or the adsorbent in the tower, and then desorbs the adsorbed methanol from the packing or the adsorbent by heating or reducing pressure, etc., to form pure methanol product.

[0004] During long-term use of the methanol recovery tower, the packing in the packing layer needs to be cleaned or replaced regularly to ensure the working efficiency of the methanol recovery tower. However, the packing layer in the methanol recovery tower is generally arranged as bulk packing or structured packing, and when the bulk packing is replaced, the packing in each installation ring needs to be disassembled and cleaned one by one, which prolongs the replacement time of the packing and affects the replacement efficiency of the packing. When the structured packing is replaced, since the installation ring in the structured packing is usually integrally arranged, the tower body may need to be disassembled, which not only affects the replacement efficiency of the packing but also damages the methanol recovery tower. SUMMARY

[0005] In order to improve the replacement efficiency of the packing in the methanol recovery tower, the present application provides a methanol recovery system for saccharin production wastewater.

[0006] The methanol recovery system for saccharin production wastewater provided by the present application adopts the following technical solution:

[0007] The utility model provides a kind of methanol recovery system in saccharin production wastewater, including methanol tower body, the packing layer for adsorbing methanol and ammonia gas, the packing layer includes multiple partitions fixed in the methanol tower body, multiple maintenance bins integrated with the methanol tower body are equipped on the side wall of the methanol tower body, the maintenance bin is one-to-one correspondence with the partition, the maintenance bin is detachably connected with bin door on the maintenance bin, the partition is arranged along the height direction of the methanol tower body, multiple mounting rings are equipped on the partition, the mounting ring is used to place packing, mounting groove is connected in sequence and is opened in the partition, connecting belt is mounted in the mounting groove, the connecting belt is connected in sequence, driving assembly for driving the connecting belt is equipped on the partition in the partition, multiple fixing mechanisms for fixing the mounting ring are fixed on the connecting belt, the fixing mechanism is arranged along the length direction of the connecting belt and the fixing mechanism is one-to-one correspondence with the connecting belt.

[0008] By adopting the above technical scheme, when the packing in the packing layer of the methanol tower body is replaced, the bin door can be detached on the maintenance bin, then the fixing mechanism is adjusted, the mounting ring in the bin door is detached from the partition, and the packing on the mounting ring is replaced and the mounting ring is cleaned, then the driving assembly drives the connecting belt to move, so that the connecting belt drives the mounting ring to move to the partition on the side of the maintenance bin, and then the packing on the mounting ring on the connecting belt in the maintenance bin can be replaced and the mounting ring can be cleaned, so that the replacement time of the packing in the methanol tower is reduced and the replacement efficiency of the packing is improved.

[0009] Optionally, a plurality of hidden grooves are formed in the bottom of the mounting groove, the driving assembly includes a driving motor mounted in the hidden groove, the driving motor is one-to-one correspondence with the hidden groove, a plurality of pulleys are rotatably connected to the partition, the pulley is one-to-one correspondence with the driving motor and is connected with the driving motor shaft, and the plurality of pulleys tighten the connecting belt.

[0010] By adopting the above technical scheme, the driving motor can be started to drive the corresponding pulley to rotate, thereby quickly driving the connecting belt to move, and the mounting ring fixed to the connecting belt moves with the connecting belt.

[0011] Optionally, the fixing mechanism includes a fixing block fixed to the connecting belt, a recess is formed in the fixing block, a placement block is arranged in the recess, a locking assembly is arranged on the placement block for fixing the mounting ring to the placement block, and an elastic assembly is arranged between the recess and the placement block for limiting the movement of the placement block in the recess.

[0012] By adopting the technical scheme, the mounting ring can be fixed on the placing block through the locking assembly, then the placing block can be moved in the groove by a certain amplitude through the elastic assembly, thereby the receiving surface of the filler in the mounting ring for water flow can be changed, and the water flow on the baffle can be stirred and disturbed, thereby the water absorption effect of the filler in the mounting ring on the methanol and ammonia in the water flow is improved.

[0013] Optionally, an accommodation groove is formed in the upper end of the placing block, and the mounting ring is arranged in the accommodation groove.

[0014] By adopting the technical scheme, the mounting ring can be arranged in the accommodation groove, and the movement of the mounting ring is limited by the accommodation groove, thereby the stability of the mounting ring arranged in the accommodation groove is improved.

[0015] Optionally, the elastic assembly is a plurality of first springs, the first springs are arranged around the center of the placing block, one end of each first spring is fixedly connected to the side wall of the placing block, and the other end of each first spring is fixedly connected to the inner side wall of the groove.

[0016] By adopting the technical scheme, the movement and resetting of the placing block in the groove can be realized through the connection effect and elastic stability of the springs.

[0017] Optionally, two locking grooves are formed in the inner wall of the accommodation groove, the mounting ring is arranged between the two locking grooves, the locking assembly comprises a second spring having one end fixedly connected to the bottom of the locking groove, the other end of the second spring is fixedly connected to a locking block, the locking block is slidingly connected in the locking groove, and the locking block is tightly pressed against the side wall of the mounting ring under the action of the second spring.

[0018] By adopting the technical scheme, the locking block can be arranged in the locking groove by compressing the second spring, then the mounting ring can be arranged in the locking groove, then the compression of the second spring is cancelled, the second spring drives the locking block to tightly press the mounting ring in the accommodation groove, thereby the mounting ring is quickly fixed in the accommodation groove.

[0019] Optionally, a turbulence fan blade for receiving the force of water flow is fixedly connected to the side wall of the mounting ring.

[0020] By adopting the technical scheme, the force generated when the water flow flows on the baffle can be received by the turbulence fan blade, not only the movement amplitude of the mounting ring fixed on the placing block on the baffle can be improved, but also the turbulence fan blade can be rotated to stir the water flow near the mounting ring, thereby the absorption effect of the filler in the mounting ring on the ammonia and methanol in the water flow is improved.

[0021] Optionally, the partition plate comprises a horizontal plate and a vertical plate, the horizontal plate is fixedly connected with the vertical plate, the receiving block is fixedly connected on the mounting ring away from the vertical plate on the same partition plate, the vertical plate is provided with a transmission assembly for driving the receiving block, and the transmission assembly corresponds to the receiving block in one-to-one manner.

[0022] By adopting the technical scheme, in the two adjacent partition plates, the water flow can fall on the horizontal part of the lower partition plate through the vertical plate of the upper partition plate, the power generated in the falling process of the water flow can drive the receiving block through the transmission assembly, thereby causing the mounting ring to vibrate, and the absorption efficiency of the filler in the mounting ring to the methanol and ammonia gas is improved.

[0023] Optionally, the transmission assembly comprises a rotating shaft rotatably connected to the vertical plate, one end of the rotating shaft is fixedly connected with a driving rod, the driving rod is used for abutting against the receiving block, and the other end of the rotating shaft is fixedly connected with a receiving fan blade for receiving the power of the water flow.

[0024] By adopting the technical scheme, when the water flow flows through the driving fan blade, the driving fan blade can drive the rotating shaft to rotate, thereby causing the driving rod fixedly connected to the rotating shaft to rotate and abutting against the receiving block, and the mounting ring moves in the groove.

[0025] Optionally, the horizontal plate is provided with a protruding part, and the protruding part is arranged in the maintenance bin.

[0026] By adopting the technical scheme, the horizontal plate is arranged in the maintenance bin, so that the staff can conveniently replace the mounting ring in the protruding part.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The filler on the mounting ring on the connecting belt can be replaced and the mounting ring can be cleaned in the maintenance bin in sequence, thereby reducing the replacement time of the filler in the methanol tower and improving the replacement efficiency of the filler;

[0029] 2. The placement block can move in the groove by a certain amplitude through the elastic assembly, thereby changing the receiving surface of the filler in the mounting ring and playing a stirring and flow disturbing effect on the water flow on the partition plate, thereby improving the water absorption effect of the filler on the methanol and ammonia gas in the water flow;

[0030] 3. The driving fan blade can receive the force generated when the water flow flows on the partition plate, which not only improves the moving amplitude of the mounting ring fixed on the placement block on the partition plate, but also stirs the water flow near the mounting ring by rotating the driving fan blade, thereby improving the absorption effect of the filler in the mounting ring on the ammonia gas and methanol in the water flow. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of the structure of a maintenance compartment of an embodiment of the present application;

[0033] Figure 3 is a schematic diagram of the structure of a packing layer of an embodiment of the present application;

[0034] Figure 4 is a schematic diagram of the structure of a drive assembly of an embodiment of the present application;

[0035] Figure 5 is a schematic diagram of the structure of a locking assembly of an embodiment of the present application;

[0036] Figure 6 is a schematic diagram of the structure of a maintenance compartment of an embodiment of the present application; Figure 3 is a schematic diagram of the structure of a maintenance compartment of an embodiment of the present application;

[0037] Figure 7 is a schematic diagram of the structure of a maintenance compartment of an embodiment of the present application; Figure 3 is a schematic diagram of the structure of a maintenance compartment of an embodiment of the present application.

[0038] In the figure, 1 is a methanol column body; 11 is a packing layer; 112 is a partition; 1121 is a horizontal plate; 11211 is a protruding portion; 1122 is a vertical plate; 1123 is a mounting groove; 1124 is a hidden groove; 113 is a connecting band; 114 is a drive assembly; 1141 is a drive motor; 1142 is a pulley; 12 is a maintenance compartment; 121 is a compartment door; 13 is a mounting ring; 14 is a fixing mechanism; 141 is a fixing block; 1411 is a recess; 142 is a placement block; 1421 is a placement groove; 14211 is a locking groove; 143 is an elastic assembly; 1431 is a first spring; 144 is a locking assembly; 1441 is a second spring; 1442 is a locking block; 15 is a turbulence vane; 16 is a receiving block; 17 is a transmission assembly; 171 is a rotating shaft; 172 is a drive rod; 173 is a receiving vane; 18 is a reboiler; 19 is a condenser; 2 is an intermediate tank; 3 is a reflux pump; 4 is an ammonia gas absorption tank. DETAILED DESCRIPTION

[0039] The following will be described in detail below with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 7 The present application will be described in further detail below.

[0040] An embodiment of the present application is a methanol recovery system for saccharin production wastewater, which, with reference to the accompanying drawings, Figure 1, including the methanol tower body 1, the methanol tower body 1 includes the reboiler 18 and the condenser 19, the condenser 19 is connected with the ammonia gas absorption tank 4 for absorbing ammonia gas and the intermediate tank 2 for storing liquid methanol, and the intermediate tank 2 is provided with the reflux pump 3 for making the liquid methanol reflux into the methanol tower body 1.

[0041] Therefore, when the methanol tower body 1 works, the material can be heated and gasified in the methanol tower body 1, the gasified methanol can enter the condenser 19 from the methanol tower body 1, and then become liquid, the liquid methanol enters the intermediate tank 2, the ammonia gas separated by the condenser 19 can enter the ammonia gas absorption tank 4 for absorption, the other waste gas enters the methanol tower body 1 again through the reflux pump 3 for rectification, and the waste water discharged from the methanol tower body 1 is heated by the reboiler 18, so that the volatile organic components contained in the waste water are vaporized and then enter the methanol tower body 1 again for cyclic absorption.

[0042] Referring to Figure 2 , Figure 3 and Figure 4 , the methanol tower body 1 further comprises a filler layer 11 arranged on the methanol tower body 1, the filler layer 11 comprises a plurality of baffles 112 arranged equidistantly along the length direction of the methanol tower body 1, and adjacent two baffles 112 are arranged staggeredly, the plurality of baffles 112 and the inner wall of the methanol tower body 1 cooperate to form a serpentine channel for water flow, and the water flow of the methanol tower body 1 can flow through each baffle 112 from top to bottom in sequence and finally pass through the lowermost baffle 112.

[0043] The baffle 112 comprises a horizontal plate 1121 and a vertical plate 1122, the horizontal plate 1121 is fixedly connected with the vertical plate 1122, and the end faces of the horizontal plate 1121 and the vertical plate 1122 are perpendicular. A plurality of maintenance bins 12 are fixedly connected to the side wall of the methanol tower body 1, the maintenance bins 12 correspond to the baffles 112 one by one and are communicated, and the maintenance bin 12 comprises a bin door 121 detachably connected to the maintenance bin 12, and in the figure, the bin door 121 is detachably connected to the maintenance bin 12 by threaded connection of the four corner bolts of the bin door 121.

[0044] Referring to Figure 3 and Figure 4 , an installation groove 1123 connected in tail is arranged on the upper end face of the baffle 112, a connection belt 113 connected in tail is arranged in the installation groove 1123, the connection belt 113 is arranged at the groove bottom of the installation groove 1123, a plurality of installation rings 13 for placing fillers are arranged on the connection belt 113, and a fixing mechanism 14 for fixing the installation ring 13 on the connection belt 113 is arranged between the installation ring 13 and the connection belt 113. Each baffle 112 is provided with a driving assembly 114 for driving the connection belt 113 to transmit power.

[0045] Referring toFigure 3 、 Figure 4 and Figure 5 The driving assembly 114 comprises a plurality of belt pulleys 1142 arranged at the turning points of the connecting belt 113, the belt pulleys 1142 are rotationally connected to the partition plate 112, and the plurality of belt pulleys 1142 tighten the connecting belt 113. The partition plate 112 is provided with a hidden groove 1124 below the belt pulleys 1142, and the hidden groove 1124 corresponds to the belt pulleys 1142 one by one. The driving assembly 114 further comprises a plurality of driving motors 1141, the driving motors 1141 in the application have a waterproof effect, the driving motors 1141 are installed in the hidden groove 1124 and are in one-to-one correspondence with the belt pulleys 1142 and are connected in shaft, and the horizontal plate 1121 is arranged as a protruding part 11211 in the maintenance bin 12.

[0046] When the filler in the filler layer 11 is replaced, the door 121 is opened, and then the driving motors 1141 are started to drive the plurality of belt pulleys 1142 to rotate, thereby driving the connecting belt 113, so that the mounting ring 13 fixed to the connecting belt 113 by the fixing mechanism 14 enters the protruding part 11211 of the partition plate 112 in turn, and the filler in the mounting ring 13 can be replaced in the maintenance bin 12.

[0047] The fixing mechanism 14 comprises a fixing block 141 fixedly connected to the connecting belt 113, and a recess 1411 is formed in the upper end of the fixing block 141. A placement block 142 is arranged in the recess 1411, and an elastic assembly 143 is arranged between the placement block 142 and the inner wall of the recess 1411 to limit the movement position of the placement block 142 in the recess 1411.

[0048] Referring to Figure 5 The elastic assembly 143 comprises four first springs 1431, which are equidistantly arranged around the center of the placement block 142. One end of the first spring 1431 is fixedly connected to the inner side wall of the recess 1411, and the other end of the first spring 1431 is fixedly connected to the arc-shaped outer side wall of the placement block 142.

[0049] Therefore, when water flows through the upper end surface of the partition plate 112, the impact force of the water flow can push the mounting ring 13, so that the mounting ring 13 can move in the recess 1411 under the action of the first spring 1431, thereby increasing the contact area of the filler on the mounting ring 13 with the water flow on the partition plate 112. In order to improve the movement amplitude of the mounting ring 13 in the recess 1411, the mounting ring 13 is rotationally connected with a turbulence fan blade 15. When the water flow passes through the turbulence fan blade 15, the turbulence fan blade 15 not only drives the mounting ring 13 to move in the recess 1411, but also has an effect of stirring the water flow.

[0050] The upper end of the placing block 142 is provided with a locking groove 14211 for placing the mounting ring 13, and the locking groove 14211 is provided with a locking assembly 144 for fixedly connecting the mounting ring 13 in the placing groove 1421. Four locking grooves 14211 are arranged on the side wall of the placing groove 1421, and the locking grooves 14211 are equidistantly arranged along the inner circumferential wall of the placing groove 1421. The locking assembly 144 comprises a second spring 1441, one end of the second spring 1441 is fixedly connected to the groove bottom of the locking groove 14211, and the other end of the second spring 1441 is fixedly connected with a locking block 1442, the side of the locking block 1442 away from the groove bottom of the placing groove 1421 is provided as an inclined surface, and the locking block 1442 is slidingly connected in the locking groove 14211. At the same time, the locking block 1442 is abutted against the side wall of the mounting ring 13 under the action of the second spring 1441.

[0051] With reference to Figure 3 , Figure 6 and Figure 7 , in order to further improve the turbulence effect of the mounting ring 13 on the water flow on the baffle 112, the vertical plate 1122 in the upper baffle 112 of the adjacent two baffles 112 is provided with a transmission assembly 17 for driving the mounting ring 13 on the side of the lower baffle 112 close to the vertical plate 1122 in the upper baffle 112 to move in the groove 1411.

[0052] The mounting ring 13 on the side of the lower baffle 112 close to the vertical plate 1122 in the upper baffle 112 of the adjacent two baffles 112 is fixedly connected with a receiving block 16. The transmission assembly 17 comprises a plurality of rotating shafts 171 penetrating and rotatingly connected to the vertical plate 1122, the axis of the rotating shaft 171 is perpendicular to the end face of the vertical plate 1122, one end of the rotating shaft 171 is fixedly connected with a driving rod 172, the end of the driving rod 172 is abutted against the receiving block 16, and the other end of the rotating shaft 171 is fixedly connected with a receiving fan blade 173 for receiving the water flow force.

[0053] Therefore, when the water flow falls from the vertical plate 1122 in the upper baffle 112 of the adjacent two baffles 112, the water flow will drive the receiving fan blade 173 to rotate, so that the driving rod 172 will rotate and drive the receiving block 16 under the action of the rotating shaft 171, thereby changing the position of the mounting ring 13 in the groove, and further making the mounting ring 13 move in the groove 1411.

[0054] The principle of the embodiment of the present application is that when the packing in the mounting ring 13 is replaced and the mounting ring 13 is cleaned, the mounting ring 13 in the maintenance bin 12 is pulled out from the placing groove 1421 by opening the bin door 121, then the mounting ring 13 is cleaned and the packing in the mounting ring 13 is replaced, then the driving motor 1141 is started to drive the connecting belt 113, so that the mounting ring 13 fixed on the connecting belt 113 by the fixing mechanism 14 enters the maintenance bin 12 in sequence, and then the cleaning of all the mounting rings 13 on the same partition plate 112 and the replacement of the packing in the mounting ring 13 can be completed in the maintenance bin 12.

[0055] The embodiments of the specific embodiment are the preferred embodiments of the present application, but do not limit the protection scope of the present application, wherein the same parts are indicated by the same reference numerals. Therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A methanol recovery system for use in saccharin production wastewater, comprising a methanol column body (1) comprising a packing layer (11) for adsorbing methanol and ammonia gas, characterized in that, The packing layer (11) comprises a plurality of partitions (112) fixed in the methanol tower body (1), a plurality of maintenance warehouses (12) are arranged on the side wall of the methanol tower body (1) and integrally arranged with the methanol tower body (1), the maintenance warehouses (12) correspond to the partitions (112) one by one, the maintenance warehouses (12) are provided with warehouse doors (121) which are detachably connected to the maintenance warehouses (12), the partitions (112) are arranged along the height direction of the methanol tower body (1), a plurality of mounting rings (13) are arranged on the partitions (112), the mounting rings (13) are used for placing fillers, mounting grooves (1123) are arranged on the partitions (112) and connected in a tail-to-head mode, a connecting belt (113) is arranged in the mounting grooves (1123) and connected in a tail-to-head mode, a driving assembly (114) is arranged on the partition (112) and used for driving the connecting belt (113) to drive in the partition (112), a plurality of fixing mechanisms (14) are fixed to the connecting belt (113) and used for fixing the mounting rings (13), the fixing mechanisms (14) are arranged along the length direction of the connecting belt (113) and correspond to the connecting belt (113) one by one, the fixing mechanism (14) comprises a fixing block (141) fixed to the connecting belt (113), a recess (1411) is arranged on the fixing block (141), a placing block (142) is arranged in the recess (1411), a locking assembly (144) is arranged on the placing block (142) and used for fixing the mounting ring (13) to the placing block (142), an elastic assembly (143) is arranged between the recess (1411) and the placing block (142) and used for limiting the movement of the placing block (142) in the recess (1411), the elastic assembly (143) comprises a plurality of first springs (1431), the first springs (1431) are arranged around the center of the placing block (142), one end of the first spring (1431) is fixed to the side wall of the placing block (142), and the other end of the first spring (1431) is fixed to the inner side wall of the recess (1411), the partition (112) comprises a horizontal plate (1121) and a vertical plate (1122), the horizontal plate (1121) is fixed to the vertical plate (1122), a receiving block (16) is fixed to the mounting ring (13) away from the vertical plate (1122) on the same partition (112), a transmission assembly (17) is arranged on the vertical plate (1122) and used for driving the receiving block (16), the transmission assembly (17) corresponds to the receiving block (16) one by one, the transmission assembly (17) comprises a rotating shaft (171) rotatably connected to the vertical plate (1122), one end of the rotating shaft (171) is fixedly connected with a driving rod (172), and the driving rod (172) is used for abutting against the receiving block (16).The other end of the rotating shaft (171) is fixedly connected with a receiving fan blade (173) for receiving water flow force.

2. A system for recovering methanol from a saccharin production wastewater according to claim 1, wherein A plurality of hidden grooves (1124) are arranged on the bottom of the mounting groove (1123), the driving assembly (114) comprises a driving motor (1141) mounted in the hidden groove (1124), the driving motor (1141) corresponds to the hidden groove (1124), a plurality of pulleys (1142) are rotatably connected to the partition plate (112), the pulley (1142) corresponds to the driving motor (1141) and is connected with the driving motor (1141), and the plurality of pulleys (1142) tighten the connecting belt (113).

3. A system for recovering methanol from a saccharin production wastewater according to claim 1, wherein The placing groove (1421) is arranged on the upper end of the placing block (142), and the mounting ring (13) is arranged in the placing groove (1421).

4. A system for recovering methanol from a saccharin production wastewater according to claim 3, wherein Two locking grooves (14211) are arranged on the inner wall of the placing groove (1421), the mounting ring (13) is arranged between the two locking grooves (14211), the locking assembly (144) comprises a second spring (1441) fixed at the bottom of the locking groove (14211), one end of the second spring (1441) is fixedly connected with a locking block (1442), the locking block (1442) is slidably connected in the locking groove (14211), and the locking block (1442) is tightly arranged on the side wall of the mounting ring (13) under the action of the second spring (1441).

5. A system for recovering methanol from a saccharin manufacturing wastewater according to claim 1, wherein The side wall of the mounting ring (13) is fixedly connected with a spoiler blade (15) for receiving water flow.

6. A system for recovering methanol from a saccharin production wastewater according to claim 1, wherein The horizontal plate (1121) is provided with a protruding portion (11211), and the protruding portion (11211) is arranged in the maintenance bin (12).

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