WO2021168888A1

WO2021168888A1 - Sea sand dechlorination apparatus and sea sand dechlorination method

Info

Publication number: WO2021168888A1
Application number: PCT/CN2020/077800
Authority: WO
Inventors: 曹健; 黄展明; 洪林; 郑永旭
Original assignee: 广东新龙海洋装备科技有限公司
Priority date: 2020-02-26
Filing date: 2020-03-04
Publication date: 2021-09-02
Also published as: CN111205007B; CN111205007A

Abstract

Disclosed is a sea sand dechlorination apparatus, comprising: a box (1) provided with a first electrolytic tank (11), a sedimentation tank (12) and a second electrolytic tank (13); a conveying device (2) comprising an obliquely arranged conveying belt (21), with one end of the conveying belt (21) being located in the first electrolytic tank (11), and the other end thereof extending out of the box (1); a first electrolysis device (3) arranged at the end of the conveying belt (21) that is located in the first electrolytic tank (11), the first electrolysis device (3) comprising a first anode screen plate (31), a first diaphragm (32) and a first cathode plate (33), which are correspondingly arranged from top to bottom, with the conveying belt (21) being arranged between the first anode screen plate (31) and the first cathode plate (33); and a second electrolysis device (4) detachably arranged in the second electrolytic tank (13), wherein the first electrolytic tank (11) is connected to the sedimentation tank (12) by means of a first pump body (110); an overflow dam (121) is arranged between the sedimentation tank (12) and the second electrolytic tank (13); and the second electrolytic tank (13) is in communication with the first electrolytic tank (11). The apparatus can continuously produce sand and has a high sand yield.

Description

Sea sand dechlorination equipment and sea sand dechlorination method

Technical field

The invention relates to the related technical field of sea sand dechlorination devices, in particular to a sea sand dechlorination equipment and a sea sand dechlorination method.

Background technique

Sea sand, as its name implies, is sand and gravel in the sea. As the second largest marine mineral after oil and natural gas, sea sand has many uses, one of the most important uses is as a raw material for engineering construction, especially the reclamation of land for large-scale construction.

As the country attaches great importance to environmental protection, river sand mining has been greatly reduced, and the price of river sand has also risen, which is far from meeting the needs of the market. It has gradually begun to mine sea sand to reduce costs. Since the sea sand contains chloride ions, if this component exceeds the standard, it will have a serious corrosive effect on steel bars after being mixed with concrete and used in engineering construction. The existing sea sand dechlorination components are all washed by large-scale equipment to achieve the dechlorination effect. However, the washing effect is not ideal, the dechlorination is insufficient, and a large amount of waste water is easily generated, which causes a waste of water resources. .

Summary of the invention

The purpose of the present invention is to provide a sea sand dechlorination equipment and a sea sand dechlorination method to solve the technical problems of sea sand dechlorination.

The technical solutions adopted by the present invention to solve the technical problems are as follows:

According to one aspect of the present invention, a sea sand dechlorination equipment is designed, including:

The box body is provided with a first electrolytic cell, a sedimentation tank and a second electrolytic cell;

Conveyor device, which includes an inclined conveyor belt, one end of the conveyor belt is placed in the first electrolytic cell, and the other end extends out of the box;

The first electrolysis device is arranged at one end of the first electrolysis cell of the conveyor belt. The first electrolysis device includes a first anode mesh plate, a first diaphragm and a first cathode plate which should be arranged from top to bottom. The conveyor belt is arranged on the first electrolytic cell. Between the anode mesh plate and the first cathode plate;

The second electrolysis device can be detachably arranged in the second electrolysis cell;

The first electrolytic cell and the sedimentation tank are connected through a first pump body, an overflow dam is arranged between the sedimentation tank and the second electrolytic cell, and the second electrolytic cell is connected with the first electrolytic cell.

Using the above technical solution, by installing the first electrolytic device at one end of the conveyor belt, when the sea sand needs to be dechlorinated, the first electrolytic cell is filled with liquid, and the sea sand is continuously placed on the end of the conveyor belt immersed in the liquid. When the sand is output to the outside of the box, when it passes between the first anode mesh plate and the first cathode plate, the chloride in the sea sand and part of the chloride diffused from the sea sand into the liquid are electrolyzed to form chloride ions, and the chloride ions are subjected to electrolysis. The electric field moves to the first anode mesh plate and forms chlorine gas on it to separate the sea sand from the sea sand to realize the dechlorination of the sea sand. The electrolyzed sea sand is output from the liquid, and after draining, it is output from the other end of the conveyor belt to the outside of the box. , It becomes the finished sand, and the continuous operation of the conveying device can realize the continuous dechlorination treatment of the sea sand; in addition, the liquid and fine silt in the first electrolytic tank can be continuously passed into the sedimentation tank through the first pump body for sedimentation treatment, and the Fine mud sand prevents the accumulation of fine mud sand from affecting the operation of the conveying device. The liquid level in the sedimentation tank is higher than the second electrolytic tank. The chloride in the liquid forms chloride ions, and the chloride ions are moved to the second anode plate by the electric field and form chlorine gas on it and separated from the liquid. The electrolyzed liquid returns to the first electrolytic cell and passes through the first pump body and the The second electrolysis device can realize the circulating precipitation and electrolytic treatment of the liquid in the first electrolytic cell, preventing the continuous increase of the chloride ion concentration in the liquid from affecting the dechlorination effect of the sea sand, and ensuring the quality of the sea sand; verified by experiments, the sea sand after the chloride ion removal The chloride ion content is much lower than the standard of the first-grade sand, the dechlorination effect is good, the quality of the sea sand is high, and the sand can be continuously produced, and the sand production is high; in addition, the liquid in the first electrolytic cell can be recycled, which greatly saves Water consumption, and no waste water is discharged; it solves the unsatisfactory effect of the existing sea sand to remove chloride ions through large-scale equipment, and the problem of insufficient chlorine removal is prone to generate a large amount of waste water and waste of water resources. At the same time, it also solves the problem of A problem of the accumulation of fine sand in the electrolytic cell, and the problem that the concentration of chloride ions in the liquid in the first electrolytic cell will increase with the amount of sea sand processed, which affects the sea sand's dechlorination effect.

In order to better solve the above technical defects, the present invention also has better technical solutions:

In some embodiments, the conveying device further includes a driving roller, a driven roller, a conveying support, and a driving motor. The conveying support is connected to the box body. The driving roller and the driven roller are arranged at both ends of the conveying support, and the conveying belt is sleeved. On the driving roller and the driven roller, the conveyor belt is a net chain conveyor belt, and the driving motor is installed on the conveying bracket, and the driving roller is driven to rotate by a belt or a chain.

The mesh chain conveyor belt has uniform gaps, which facilitates the ions generated during the electrolysis process to pass through the gaps and travel to the anode plate or the cathode plate.

In some embodiments, both the first anode mesh plate and the first cathode plate are parallel to the conveyor belt.

As a result, the best electrolysis effect can be ensured.

In some embodiments, a chlorine gas treatment device is provided above the first electrolysis device. The chlorine gas treatment device is used to collect and treat the chlorine gas generated during the electrolysis of the first electrolysis device and the second electrolysis device. The chlorine gas treatment device includes: a chlorine gas collection shell The bottom of the chlorine gas collection shell is inclined and fixed to the transmission support. The side wall of the chlorine gas collection shell is provided with sockets. The first anode mesh plate and the first diaphragm are detachably arranged in the sockets. The chlorine absorption tower passes through the guide The air pipe communicates with the chlorine gas collection shell.

As a result, the chlorine produced by the electrolysis of the first electrolysis device and the second electrolysis device can be passed into the chlorine absorption tower to prevent it from being directly discharged into the air and causing harm to the human body and the environment; the first anode mesh plate and the first diaphragm can be The disassembly setting is convenient for later cleaning or replacement.

In some embodiments, when the first anode mesh plate and the first diaphragm are placed in the socket, the first diaphragm and the inside of the chlorine gas collection housing form a closed chlorine gas collection chamber, and the first anode mesh plate is located in the chlorine gas collection chamber .

Therefore, it is convenient to collect the chlorine gas generated during the electrolysis of the first anode mesh plate, and at the same time, it is possible to prevent the mixing of hydrogen and chlorine gas generated during the electrolysis of the first cathode plate from possible danger.

In some embodiments, one end of the conveyor belt placed in the first electrolytic cell is provided with a sand supply hopper, and the sand outlet at the bottom of the sand supply hopper corresponds to the conveyor belt for conveying sea sand to the conveyor belt.

In some embodiments, the sand inlet of the sand supply hopper is provided with a first spray head, and the first spray head is connected to a second pump body placed in the first electrolytic cell through a pipeline to supply sand from the bottom of the sand hopper. The mouth is provided with an adjusting plate for adjusting the size of the sand outlet.

Therefore, the first spray head can spray liquid into the sand supply hopper to pre-wash the sea sand. The liquid sprayed by the first spray head contacts the sea sand, which can make the part of the chloride and fine particles attached to it come into contact with the sea sand. The mud powder is separated from it to improve the dechlorination effect of the sea sand. By setting an adjustment plate at the bottom of the sand supply hopper, the sand output can be conveniently controlled.

In some embodiments, the second electrolysis device includes a second anode plate, a second diaphragm, a second cathode plate, and a second fixing frame, and the second anode plate, the second diaphragm, and the second cathode plate are installed in the second fixing frame, And the second diaphragm is located between the second anode plate and the second cathode plate, the anode chamber is formed between the second diaphragm and the second anode plate, the cathode chamber is formed between the second diaphragm and the second cathode plate, and the anode chamber passes through the air duct Connect with the chlorine absorption tower.

Therefore, the chlorine gas generated by the electrolysis of the second anode plate can be passed into the chlorine absorption tower to prevent it from being directly discharged into the air and causing harm to the human body and the environment.

In some embodiments, a vibrating water filter screen is arranged above the sedimentation tank, the vibrating water filter screen is arranged obliquely, and a second spray head is arranged above the vibrating water filter screen, and the second spray head is connected to the second pump body through a pipeline .

When the sea sand is separated from the conveyor belt, a small part of it will still stick to the conveyor belt. Spray liquid on the conveyor belt through the second spray head to wash off the sand on the conveyor belt, and the liquid and sand will fall onto the vibrating water filter. , The vibrating water filter screen vibrates up and down to make the liquid fall into the sedimentation tank, and the sand is output to the outside of the box to separate the liquid and sand, and prevent the sand from accumulating in the first electrolytic cell and causing the conveyor to fail to operate.

According to another aspect of the present invention, a sea sand dechlorination method is designed, including the following steps:

A. The first electrolytic cell is filled with liquid, the liquid has not passed the first anode mesh plate, and the sea sand is continuously placed in the sand supply hopper. At the same time, the first spray head starts to spray liquid into the sand supply hopper to pre-process the sea sand. After washing, the sea sand is transported to the conveyor belt through the sand outlet at the bottom of the sand supply bucket;

B. Drive the motor to drive the conveyor belt to rotate, control the thickness of the sea sand on the conveyor belt to be: 4-7cm, the transmission speed is: 4-10m/min, and control the current density on the surface of the first anode mesh plate and the first cathode plate: 100 -1000A/m ² ;

C. Make the sea sand pass between the first anode mesh plate and the first cathode plate at a uniform speed. The chloride in the sea sand and part of the chloride diffused from the sea sand into the liquid are electrolyzed to form chloride ions, and the chloride ions are affected by the electric field. The first anode mesh plate moves, and the chlorine gas formed on it is collected and processed by the chlorine gas treatment device. The electrolyzed sea sand is output from the liquid and output from the other end of the conveyor belt to the outside of the box;

D. The dechlorination equipment runs for 15-30 minutes, and the first pump body is started. The liquid and fine silt in the first electrolytic tank are continuously passed into the sedimentation tank for precipitation treatment, and the liquid level in the sedimentation tank rises and overflows to the second electrolytic tank for electrolysis , Control the current density on the surface of the second anode plate and the second cathode plate to be: 100-1000A/m ² , and the chlorine produced by electrolysis is passed into the chlorine treatment device.

Using the above technical method, the sea sand can be pre-washed through the first spray head, and the liquid sprayed by the first spray head contacts the sea sand, which can separate the part of the chloride and the fine mud powder attached to the sea sand. , Through the first anode net plate and the first cathode plate energized, the chloride in the sea sand and the part of the chloride diffused from the sea sand into the liquid can be electrolyzed, and the chlorine gas can be separated from the sea sand to realize the sea The sand removes chloride ions. The first pump body is activated, and the second anode plate and the second cathode plate are energized, which can realize the circulating precipitation and electrolytic treatment of the liquid in the first electrolytic cell, and prevent the chloride ion concentration in the liquid in the first electrolytic cell from rising continuously Highly influencing the dechlorination effect of sea sand to ensure the quality of sea sand.

Description of the drawings

Fig. 1 is a schematic structural diagram of a sea sand dechlorination equipment according to an embodiment of the present invention;

Figure 2 is a schematic top view of the structure of the box and the conveying device of the sea sand dechlorination equipment;

Fig. 3 is a schematic diagram of an enlarged structure of position A in Fig. 1;

Figure 4 is a schematic diagram of the structure of the driven roller of the sea sand dechlorination device;

Fig. 5 is a schematic diagram of an enlarged structure of position B in Fig. 4;

Figure 6 is a schematic diagram of the explosive structure of the oil seal seat, oil seal and oil seal cover plate on the driven roller of the sea sand dechlorination device;

Figure 7 is a front view of the oil seal seat on the driven roller of the sea sand dechlorination device;

8 is a schematic diagram of the explosive structure of the first anode mesh plate, the first ion exchange membrane and the first fixed frame of the sea sand dechlorination device;

Fig. 9 is a schematic diagram of the structure of the second anode plate, the second ion exchange membrane, the second cathode plate and the second fixing frame of the sea sand dechlorination device.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

Example 1

Referring to Figures 1 to 9, a sea sand dechlorination device provided by the present invention includes:

The tank 1 is provided with a first electrolytic cell 11, a sedimentation tank 12, and a second electrolytic cell 13. When this equipment is used, the liquid contained in the first electrolytic cell 11 is fresh water or lye water, which is preferred in this embodiment The first electrolytic cell 11 is filled with fresh water;

The conveying device 2 includes an inclined conveying belt 21, one end of the conveying belt 21 is placed in the first electrolytic cell 11, and the other end extends out of the box 1;

The first electrolysis device 3 is arranged at one end of the conveyor belt 21 placed on the first electrolysis cell 11. The first electrolysis device 3 includes a first anode mesh plate 31, a first diaphragm 32, and a first cathode plate 33 correspondingly arranged from top to bottom. , The conveyor belt 21 is arranged between the first anode mesh plate 31 and the first cathode plate 33;

The second electrolysis device 4 is detachably arranged in the second electrolysis cell 13;

The first electrolytic cell 11 and the sedimentation tank 12 are connected by a first pump body 110. The first electrolytic cell 11 is provided with a fine sand collecting chute 111. The fine sand collecting chute 111 is arranged obliquely below the conveying device 2. The left end of the trough 111 is high and the right end is low. The width of the fine sand collection chute 111 is greater than or equal to the width of the conveying device 2. In this embodiment, the width of the fine sand collection chute 111 is preferably greater than the width of the conveying device 2; At the right end of the tank 111, the output end of the first pump body 110 is connected with a pipeline communicating with the sedimentation tank 12 at the other end. The fine sand collection chute 111 is used to collect the fine sand scattered in the liquid to one end, which is convenient for the first pump body 110 transports it to the sedimentation tank 12 for sedimentation treatment. An overflow dam 121 is provided between the sedimentation tank 12 and the second electrolytic cell 13. The height of the overflow dam 121 is lower than the height of the outer wall of the sedimentation tank 12 and the first electrolytic cell 11, and the second electrolytic cell 13 is a narrow strip. The right end of the second electrolytic cell 13 is in communication with the first electrolytic cell 11. Since the second electrolytic cell 13 is in communication with the first electrolytic cell 11, the second electrolytic device 4 can not only directly electrolyze the liquid in the first electrolytic cell 11, but also continuously remove the liquid in the first electrolytic cell 11 through the first pump body 110. And the fine mud sand is transported to the sedimentation tank 12 for precipitation treatment. The liquid level in the sedimentation tank 12 rises and overflows to the second electrolytic cell 13 for electrolysis, and then flows back to the first electrolytic cell 11, which can realize the circulation and precipitation of the liquid in the first electrolytic cell 11. , Electrolytic treatment.

The sea sand dechlorination equipment also includes: a sand supply bucket 5 and a chlorine treatment device 6.

The sand supply hopper 5 is arranged above one end of the first electrolytic cell 11 on the conveyor belt 21, a first spray head 51 is arranged above the sand inlet on the top of the sand supply hopper 5, and the first spray head 51 is connected with a pipe through a pipeline. In the second pump body 112 in the first electrolytic cell 11, the second pump body 112 is used to transport the liquid in the first electrolytic cell 11 to the first spray head 51 and spray it into the sand supply hopper 5 to carry out sea sand Prewash. The sand supply bucket 5 has a V-shaped cross section, and the sand outlet at the bottom is provided with an adjustment plate 52 for adjusting the size of the sand outlet. The adjustment plate 52 is used to adjust the amount of sand output.

The chlorine treatment device 6 is arranged above the first electrolysis device 3 and is used to collect and treat the chlorine gas generated by the electrolysis of the first electrolysis device 3 and the second electrolysis device 4.

1 and 2, the conveying device 2 also includes a driving roller 22, a driven roller 23, a conveying bracket 24, and a driving motor 25. The conveying bracket 24 is inclined and fixed to the box body 1, and the driving roller 22 and The driven roller 23 is arranged at both ends of the conveying support 24, the conveying belt 21 is sleeved on the driving roller 22 and the driven roller 23, the conveying belt 21 is a net-chain conveyor belt with gaps on it, and the driving motor 25 is installed on the conveying support On the side 24, the driving motor 25 drives the driving roller 22 to rotate through a belt or a chain. In this embodiment, the driving motor 25 preferably drives the driving roller 22 to rotate through a chain.

Please refer to FIG. 4, the driven roller 23 includes a cylinder 231, a roller shaft 232, a bearing 233, a bearing seat 234, an oil seal seat 235, an oil seal 236, a gear 237 and an oil seal cover plate 238.

The cylinder 231 is hollow and has an open structure at both ends, which can reduce weight. The inner sides of the cylinder 231 are provided with fixed bearing seats 234. The bearing seats 234 are provided with a bearing seat through hole 2340 for the roller shaft 232 to pass through. 233 is installed in the bearing seat 234.

5, the gear 237 is provided with a gear through hole 2370 into which the right end of the oil seal seat 235 extends in the middle of the gear 237, teeth are provided on the periphery of the gear 237, and both ends of the cylinder 231 are fixed with gears 237.

5, 6 and 7, the oil seal seat 235 and the gear 237 are detachably connected by bolts. The oil seal seat 235 is provided with an oil seal groove 2350 on the right side and an oil seal through hole 2351 for the roller shaft 232 to pass through on the left side. Specifically, the oil seal seat 235 includes an oil seal seat bottom plate 2352 and an oil seal seat convex portion 2353. The oil seal seat bottom plate 2352 and the oil seal seat convex portion 2353 are arranged on the same axis. The oil seal seat convex portion 2353 is provided with an oil seal groove 2350, and the oil seal The seat bottom plate 2352 is provided with an oil seal through hole 2351 for the roller shaft 232 to pass through. The diameter of the oil seal groove 2350 is larger than the diameter of the oil seal through hole 2351 and the two are connected and arranged on the same axis.

The oil seal 236 is arranged in the oil seal groove 2350. The outer side wall of the oil seal 236 is in contact with the side wall of the oil seal groove 2350. One oil seal or multiple oil seals are arranged in the oil seal groove 2350. In this embodiment, three oil seals 236 are preferably arranged in the oil seal groove 2350. .

The oil seal cover plate 238 is fixedly connected to the oil seal seat 235. A sealing gasket is provided at the connection between the bottom plate 2352 of the oil seal seat and the gear 237.

The oil seal cover plate 238 is provided with an oil seal cover plate through hole 2380 for the roller shaft 232 to pass through.

The side of the oil seal cover 238 corresponding to the raised portion 2353 of the oil seal seat is provided with an oil seal cover raised portion 2381. When the oil seal cover 238 is fixedly connected to the raised portion 2353 of the oil seal seat, the raised portion 2381 of the oil seal cover penetrates into the oil seal groove. The 2350 is in contact with the oil seal 236.

The roller shaft 232 penetrates the cylinder 231, the oil seal cover 238 and the oil seal seat 235, is fixedly connected to the inner sleeve of the bearing 233 and is in sealing contact with the oil seal 236. The roller shaft 232 is in movable contact with the oil seal through hole 2351 and the oil seal cover plate through hole 2380. Both ends of the roller shaft 232 are fixedly connected to the conveying bracket 24.

Please refer to FIG. 8, the first anode mesh plate 31 adopts a pure titanium plane mesh, and the first anode mesh plate 31 is evenly divided into a number of mesh holes. The first anode mesh plate 31 is installed on the top surface of a first fixing frame 34. A fixed frame 34 is provided with a recess 340 on the bottom surface and a handle 341 on the side. The first diaphragm 32 is installed in the recess 340. The depth of the recess 340 is greater than the thickness of the first diaphragm 32. The diaphragm 32 and the first cathode plate 33 are both parallel to the conveyor belt 21. The first diaphragm 32 can pass the ions after the liquid electrolysis and separate the hydrogen and chlorine generated by the electrolysis; the first diaphragm 32 is an asbestos net, a non-woven fabric, One type of ion membrane, but not limited to these types; the first cathode plate 33 is fixed to the transmission support 24 by a connecting rod. In some embodiments, the first diaphragm 32 is installed on a protective net which is installed in the recess 340.

Please refer to Figures 1 and 3, the chlorine gas treatment device 6 includes: a chlorine gas collection shell 61 and a chlorine absorption tower 62. The chlorine gas collection shell 61 has a hollow interior and an open lower end. A pair of bracket seats 63 are fixed at the bottom. The transmission bracket 24 is fixed, the left side wall of the chlorine gas collection shell 61 is provided with a socket 60, and the first fixed frame 34 is movably inserted in the socket 60. In some embodiments, the inside of the chlorine gas collection shell 61 corresponds to the position of the socket 60 A pair of slide rails parallel to the conveyor belt 21 are provided. One end of the slide rail is fixedly connected to the inner left side wall of the chlorine gas collection housing 61, and the other end is fixedly connected to the inner right side wall of the chlorine gas collection housing 61. When the first fixing frame 34 is inserted When installed in the socket 60, the bottom of the first fixing frame 34 is in sliding contact with the sliding rail. When the first fixing frame 34 is completely inserted into the socket 60, the side walls of the insertion part of the first fixing frame 34 are in contact with the inner side wall of the chlorine gas collection housing 61, and the first diaphragm 32 and the chlorine gas collection housing 62 form a In the sealed chlorine gas collection chamber 63, the first anode mesh plate 31 is located in the chlorine gas collection chamber 63, and the recess 340 on the bottom surface of the first fixing frame 34 and the bottom edge of the socket 60 form an exhaust port 342. During electrolysis, the first cathode plate 33 generates hydrogen gas, and the first anode mesh plate 31 generates chlorine gas. The diaphragm 32 separates the hydrogen and chlorine generated by the electrolysis to prevent the two from mixing. Part of the hydrogen gas is blocked by the first diaphragm 32 during the ascent, and moves along the first diaphragm 32 to the exhaust port 342 and is discharged from the exhaust port 342. Part of the chlorine generated by electrolysis is dissolved in the liquid, and the rest directly enters the chlorine collecting shell 61, and enters the chlorine absorption tower 62 through the gas pipe connected with the chlorine collecting shell 61, and then is recovered and processed by the chlorine absorption tower 62.

The upper end of the second electrolytic cell 13 is provided with a top cover. The second electrolytic device 4 includes a second anode plate 41, a second diaphragm 42, a second cathode plate 43 and a second fixing frame 44. The second anode plate 41 and the second diaphragm 42 , The second cathode plate 43 is installed on the second fixing frame 44, and the second diaphragm 42 is located between the second anode plate 41 and the second cathode plate 43. The second fixing frame 44 is provided with a through hole 47. When the electrolytic cell 11 is filled with fresh water, the liquid level does not pass through the position of the through hole 47, the top cover is in contact with the top of the second fixed frame 44, an anode chamber 45 is formed between the second diaphragm 42 and the second anode plate 41, and the second diaphragm 42 is connected to the A cathode chamber 46 is formed between the second cathode plates 43, and the anode chamber 45 in the second electrolytic cell 13 is connected to the chlorine absorption tower 62 through a gas pipe for introducing the chlorine generated by the electrolysis of the anode chamber 45 into the chlorine absorption tower 62. The second diaphragm 42 can allow the ions after the liquid electrolysis to pass through and separate the hydrogen and chlorine generated by the electrolysis; the second diaphragm 42 is one of asbestos mesh, non-woven fabric, and ion membrane, but is not limited to these. In some embodiments, the cathode chamber 46 is connected to a cathode exhaust gas collection device through a gas pipe for collecting the gas generated by the electrolysis of the second cathode plate 43; the second diaphragm 42 is installed on a protective net, and the protective net is installed on the second On the fixed frame 44; in order to quickly separate the chlorine generated on the second anode plate 41, an aeration pipe can be set in the second electrolytic cell 13, and the aeration pipe is connected to the aeration device, and aerated to the second anode through the aeration pipe The plate 41 allows the chlorine gas generated on the second anode plate 41 to be quickly separated.

A vibrating filter screen 7 is arranged above the sedimentation tank 12. The vibrating filter screen 7 is inclined, the right end is high, and the left end is at the bottom. The inclination angle is 30°. The vibrating water filter screen 7 is a conventional vibrating screen, which is connected to a transmission bracket through a connecting rod. 24 is fixedly connected, and a second spray head 71 is provided above the vibrating water filter screen 7, and the second spray head 71 is connected to the second pump body 112 through a pipeline.

The chloride in the sea sand is mainly sodium chloride, and a small amount of magnesium chloride, calcium chloride, etc. The chloride ions generated by the electrolysis of chloride move to the first anode mesh plate 31 and generate chlorine gas thereon, and the hydrogen ions generated by the electrolysis move to the first cathode plate 33 and generate hydrogen gas thereon. Part of the chloride will diffuse into the liquid in the first electrolytic cell 11 and can be electrolytically processed through the second anode plate 41 and the second cathode plate 43.

A sea sand dechlorination method. The sea sand dechlorination equipment used in the verification of the sea sand dechlorination effect is produced by Guangdong Xinlong Ocean Equipment Technology Co., Ltd. The experimental site is conducted at the Guangdong Xinlong Ocean Equipment Technology Co., Ltd. test site.

The first electrolytic cell 11 is filled with liquid, and the liquid is clean water or lye water. In this embodiment, it is preferable that the first electrolytic cell 11 is filled with clean water, and the water level is below the first anode mesh plate 31, and the sea sand dechlorination equipment is activated. The second pump body 112 is started, the first anode mesh plate 31 and the first cathode plate 33 are energized, and untreated sea sand is continuously placed in the sand supply hopper 5, and the first spray head 51 sprays water into the sand supply hopper 4. The sea sand is pre-washed, and then the sea sand is transported to the conveyor belt 21 through the sand outlet at the bottom of the sand supply bucket 5 after being soaked for a short time.

The drive motor drives the conveyor belt 21 to rotate, the thickness of the sea sand on the conveyor belt 21 is controlled to be approximately: 4cm, the conveying speed is: 4m/min, and the current density on the surface of the first anode mesh plate 31 and the first cathode plate 33 is controlled as: 100A/ dm ² .

The sea sand is made to pass between the first anode mesh plate 31 and the first cathode plate 33 at a uniform speed. The chloride in the sea sand and part of the chloride diffused from the sea sand into the liquid are electrolyzed to form chloride ions. The first anode mesh plate 31 moves and forms chlorine gas on it. The chlorine gas rises to the top of the chlorine gas collection shell and passes into the chlorine gas absorption tower 62. The electrolyzed sea sand is output from the water, drained and output from the other end of the conveyor belt 21 to The outside of the box becomes the finished sand.

After the sea sand dechlorination equipment operates for 10-30 minutes, preferably 15 minutes, the first pump body 110 is started, and the second anode plate 41 and the second cathode plate 43 are energized to control the current density on the surface of the second anode plate 41 and the second cathode plate 43 It is: 100-1000A/m ² , preferably 550A/m ² , the first pump body 110 continuously passes the liquid and fine silt in the first electrolytic cell 11 into the sedimentation tank 12 for sedimentation treatment, and the water surface in the sedimentation tank 12 rises. The high overflow flows to the second electrolytic cell 13 for electrolysis treatment, and the generated chlorine gas is passed to the chlorine absorption tower 62.

The sea sand dechlorination equipment is operated for 45 minutes, and 1000 g of sea sand transported from the conveyor belt 21 is taken.

The sea sand dechlorination equipment is operated for 75 minutes, and 1000 g of sea sand transported from the conveyor belt 21 is taken.

The sea sand dechlorination equipment is operated for 105 minutes, and 1000 g of sea sand transported from the conveyor belt 21 is taken.

The 1000g of sea sand taken out was roasted and finely ground under the same adjustment, and 500g was taken separately, and the chloride ion content was measured by a chloride ion meter to be 0.002%, 0.003%, and 0.003%, and the average chloride ion content was about 0.0027%.

Example 2

The drive motor drives the conveyor belt 21 to rotate, the thickness of the sea sand on the conveyor belt 21 is controlled to be approximately: 5.5cm, the transmission speed is: 7m/min, and the current density on the surface of the first anode mesh plate 31 and the first cathode plate 33 is controlled to: 550A /dm ² .

After the sea sand dechlorination equipment runs for 10-30 minutes, preferably 15 minutes, the first pump body 110 is started, the second anode plate 41 and the second cathode plate 43 are energized, and the current density on the surface of the second anode plate 41 and the second cathode plate 43 is controlled It is: 100-1000A/m ² , preferably 550A/m ² , the first pump body 110 continuously passes the liquid and fine silt in the first electrolytic cell 11 into the sedimentation tank 12 for sedimentation treatment, and the water surface in the sedimentation tank 12 rises The high overflow flows to the second electrolytic cell 13 for electrolysis treatment, and the generated chlorine gas is passed to the chlorine absorption tower 62.

The 1000g of sea sand taken out was roasted and finely ground under the same adjustment, and 500g was taken separately, and the chloride ion content was measured by a chloride ion meter to be 0.002%, 0.002%, and 0.003%, and the average chloride ion content was about 0.0023%.

Example 3

The drive motor drives the conveyor belt 21 to rotate, the thickness of the sea sand on the conveyor belt 21 is controlled to be approximately: 7cm, the conveying speed is: 10m/min, and the current density on the surface of the first anode mesh plate 31 and the first cathode plate 33 is controlled to: 1000A/ dm ² .

The 1000g of sea sand taken out was roasted and finely ground under the same adjustment, and 500g was taken separately, and the chloride ion content was measured by a chloride ion meter to be 0.003%, 0.004%, and 0.003%, and the average chloride ion content was 0.0033%.

The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, and these are all protected by the present invention. Scope.

Claims

A sea sand dechlorination equipment, which is characterized in that it comprises:

The box body is provided with a first electrolytic cell, a sedimentation tank and a second electrolytic cell;

Conveyor, which includes a conveyor belt arranged obliquely, one end of the conveyor belt is placed in the first electrolytic cell, and the other end extends out of the box;

The first electrolysis device is arranged at one end of the conveyor belt placed in the first electrolysis cell, and the first electrolysis device includes a first anode mesh plate, a first diaphragm, and a first cathode plate arranged correspondingly from top to bottom. The conveyor belt is arranged between the first anode mesh plate and the first cathode plate;

The second electrolysis device is detachably arranged in the second electrolysis cell;

The first electrolytic cell and the sedimentation tank are connected through a first pump body, an overflow dam is arranged between the sedimentation tank and the second electrolytic cell, and one side of the second electrolytic cell is in communication with the first electrolytic cell.
The sea sand dechlorination equipment according to claim 1, wherein the conveying device further comprises a driving roller, a driven roller, a conveying bracket, and a driving motor, and the conveying bracket is connected to the box body , The driving roller and the driven roller are arranged at both ends of the conveying support, the conveying belt is sleeved on the driving roller and the driven roller, the conveying belt is a net chain conveying belt, and the driving motor is installed On the conveying support, the driving roller is driven to rotate by a belt or a chain.
The sea sand dechlorination equipment according to claim 2, wherein the first anode mesh plate and the first cathode plate are both parallel to the conveyor belt.
The sea sand dechlorination equipment according to claim 3, characterized in that a chlorine gas treatment device is arranged above the first electrolysis device for collecting and processing the first electrolysis device and the second electrolysis device during electrolysis. The chlorine gas processing device includes: a chlorine gas collection shell and a chlorine gas absorption tower, the bottom of the chlorine gas collection shell is inclined and fixed to the transmission bracket, and the side wall of the chlorine gas collection shell is provided with a socket, The first anode mesh plate and the first diaphragm are detachably arranged in the socket, and the chlorine absorption tower is communicated with the chlorine collecting shell through a gas pipe.
The sea sand dechlorination equipment according to claim 4, wherein when the first anode mesh plate and the first diaphragm are placed in the socket, the first diaphragm and the inside of the chlorine collecting shell form a closed chlorine collecting In the chamber, the first anode mesh plate is located in the chlorine gas collection chamber.
The sea sand dechlorination equipment according to claim 5, wherein one end of the conveyor belt placed in the first electrolytic cell is provided with a sand supply hopper, and the sand outlet at the bottom of the sand supply hopper corresponds to the conveyor belt, Used to transport sea sand to the conveyor belt.
The sea sand dechlorination equipment according to claim 6, characterized in that the sand inlet of the sand supply hopper is provided with a first spray head, and the first spray head is connected by a pipeline. For the second pump body in the first electrolytic cell, the sand outlet at the bottom of the sand supply hopper is provided with an adjusting plate for adjusting the size of the sand outlet.
The sea sand dechlorination equipment according to claim 7, wherein the second electrolysis device comprises a second anode plate, a second diaphragm, a second cathode plate and a second fixing frame, and the second The anode plate, the second diaphragm, and the second cathode plate are installed in the second fixing frame, and the second diaphragm is located between the second anode plate and the second cathode plate. The anode chamber is formed between the second diaphragm and the second anode plate. A cathode chamber is formed between the two diaphragms and the second cathode plate, and the anode chamber is communicated with the chlorine absorption tower through a gas pipe.
The sea sand dechlorination equipment according to claim 8, wherein a vibrating water filter screen is provided above the sedimentation tank, and a second spray head is provided above the vibrating water filter screen. The second shower head is connected with the second pump body through a pipeline.
The method for achieving the dechlorination of sea sand based on the sea sand dechlorination equipment according to any one of claims 8 to 9, characterized in that it comprises the following steps:

A. The first electrolytic cell is filled with liquid, the liquid has not passed the first anode mesh plate, and the sea sand is continuously placed in the sand supply hopper. At the same time, the first spray head starts to feed the liquid in the sand supply hopper to pre-wash the sea sand , Then the sea sand is transported to the conveyor belt through the sand outlet at the bottom of the sand supply bucket;

B. Drive the motor to drive the conveyor belt to rotate, control the thickness of the sea sand on the conveyor belt to be: 4-7cm, the transmission speed is: 4-10m/min, and control the current density on the surface of the first anode mesh plate and the first cathode plate: 100 -1000A/m 2 ;

C. Make the sea sand pass between the first anode mesh plate and the first cathode plate at a uniform speed. The chloride in the sea sand and part of the chloride diffused from the sea sand into the liquid are electrolyzed to form chloride ions, and the chloride ions are affected by the electric field. The first anode mesh plate moves, and the chlorine gas formed on it is collected and processed by the chlorine gas treatment device. The electrolyzed sea sand is output from the liquid and output from the other end of the conveyor belt to the outside of the box.

D. The dechlorination equipment runs for 15-30 minutes, and the first pump body is started, and the liquid and fine silt in the first electrolytic tank are continuously passed into the sedimentation tank for precipitation treatment, and the liquid level in the sedimentation tank rises and overflows to the second electrolytic tank for electrolysis , Control the current density of the second anode plate and the second cathode plate surface to be: 100-1000A/m 2 , and the chlorine produced by electrolysis is passed into the chlorine treatment device.