Coking plant circulating water backwashing water purification and recovery treatment system

Abstract

The utility model discloses a coking plant circulating water backwashing water purification recovery treatment system, which comprises a treatment tank and a water inlet arranged on the side wall of the treatment tank, the treatment tank is of a structure with an open upper end, the internal space of the treatment tank is sequentially divided into an annular coagulation area, an annular flocculation area and a central filtering area from outside to inside through an outer cylinder and an inner cylinder, the height of the outer cylinder is lower than that of the treatment tank, the height of the inner cylinder is lower than that of the outer cylinder, a double-shaft motor is mounted on the outer cylinder through a bracket, an inverted upper U-shaped stirring rod is arranged on an upper output shaft of the double-shaft motor, an inverted lower U-shaped stirring rod is arranged on a lower output shaft, the lower end of the upper U-shaped stirring rod extends into the annular coagulation area, and the lower end of the lower U-shaped stirring rod extends into the annular coagulation area. The lower end of the lower U-shaped stirring rod extends into the annular flocculation area, and a filtering mechanism is arranged in the central filtering area. In conclusion, the device has the advantages of being high in working efficiency, good in purification effect and capable of saving water resources.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a coking plant circulating water backwash water purification and recovery treatment system. Background Art

[0002] Coking plants require a lot of water in the production process. If the used water is directly discharged without treatment, it will not only pollute the environment, but also increase water consumption and production costs. Therefore, the water must be recycled. However, after repeated recycling, the circulating water will contain a large amount of suspended matter, algae, and anions and cations. When these suspended matter and other impurities in the circulating water reach a certain amount, it is necessary to filter and clean it to prevent problems such as hardening and blockage in the circulating water system. Backwashing is often used to clean the circulating water filter equipment to ensure that the filter equipment can operate normally. During the backwashing process, the filter equipment will discharge a large amount of backwash water. Traditional backwash water will be collected through pipes and connected to the sewage treatment system, which will undoubtedly increase the workload of the sewage treatment system. The water source of the backwash water is generally clean water, which increases the water consumption and water cost. Although there are some backwash water that is treated and reused, there are often problems of low work efficiency and poor treatment effect, which cannot meet the purification needs of backwash water well. Therefore, it is an objective need to develop a coking plant circulating water backwash water purification and recovery treatment system with high working efficiency, good purification effect and water resource saving. Utility Model Content

[0003] The utility model aims to provide a coking plant circulating water backwash water purification and recovery treatment system which has high working efficiency, good purification effect and can save water resources.

[0004] The purpose of the utility model is achieved in this way, including a treatment tank and a water inlet arranged on the side wall of the treatment tank, the treatment tank is a structure with an open upper end, the internal space of the treatment tank is divided into an annular coagulation zone, an annular flocculation zone and a central filtration zone from the outside to the inside by an outer cylinder and an inner cylinder, the height of the outer cylinder is lower than the height of the treatment tank, the height of the inner cylinder is lower than the height of the outer cylinder, a double-axis motor is installed on the outer cylinder through a bracket, an inverted upper U-shaped stirring rod is arranged on the upper output shaft of the double-axis motor, an inverted lower U-shaped stirring rod is arranged on the lower output shaft, the lower end of the upper U-shaped stirring rod extends into the annular coagulation zone, the lower end of the lower U-shaped stirring rod extends into the annular flocculation zone, and a filtering mechanism is arranged in the central filtration zone.

[0005] Furthermore, a slag hopper extending to the bottom of the treatment tank is provided at the lower end of the inner cylinder, and the filtering mechanism includes a coaxially arranged open tank and a central tube, and a filter chamber, an inclined tube filler, a filter screen and activated carbon are arranged in the open tank from bottom to top. The filter chamber is a hollow cavity, and filter holes are processed on the bottom and side walls of the filter chamber. The upper end of the central tube extends into the open tank above the activated carbon, and the lower end of the central tube is bent and extends to the outside of the slag hopper.

[0006] Furthermore, a water retaining ring is arranged on the upper part of the inner wall of the inner cylinder.

[0007] Furthermore, a plurality of support plates are evenly distributed on the circumference of the outer wall of the open tank, and the support plates are connected to the water retaining ring by bolts and nuts.

[0008] Furthermore, an annular water receiving trough is arranged at the upper end of the side wall of the outer cylinder, and a plurality of vertical pipes are evenly distributed on the circumference of the bottom of the annular water receiving trough. The lower ends of the vertical pipes extend into the lower part of the annular flocculation zone, and the water inlet is located at the lower part of the side wall of the treatment tank.

[0009] Furthermore, stirring plates are obliquely arranged at the lower ends of the upper U-shaped stirring rod and the lower U-shaped stirring rod.

[0010] Furthermore, a vibrator is arranged at the bottom of the open tank.

[0011] Furthermore, connecting pipes are provided between the annular coagulation zone and the bottom of the annular flocculation zone, and between the bottom of the annular flocculation zone and the central filtration zone, and water pumps are provided on the connecting pipes.

[0012] When the utility model is in use, the backwash water of the coking plant circulating water is introduced into the annular coagulation zone through the water inlet, the corresponding coagulant is added, the double-axis motor is started, and the upper U-shaped stirring rod is driven to rotate. The upper U-shaped stirring rod rotates along the annular coagulation zone to fully stir the backwash water and the coagulant in the annular coagulation zone, so that the suspended matter and other granular impurities in the backwash water are aggregated to form a larger flocculent body. After stirring for a period of time, with the continuous introduction of the backwash water and the rise of the water level, the backwash water in the annular coagulation zone will overflow into the annular flocculation zone along the upper end of the outer cylinder. At this time, driven by the dual-axis motor, the lower U-shaped stirring rod rotates along the annular flocculation area, fully stirring the backwash water and the corresponding flocculant in the annular flocculation area, further promoting the aggregation of tiny particles and suspended matter in the backwash water, increasing the volume of the floccules, and improving the subsequent filtration efficiency and filtration effect of the floccules and impurities, and then overflowing along the upper end of the inner cylinder to the central filtration area, the backwash water is filtered by the filtering mechanism, and the floccules in the backwash water are filtered out, so as to achieve the purpose of purifying the backwash water, and the purified backwash water can be recovered and recycled. In the above process, the dual-axis motor is used to simultaneously drive the upper U-shaped stirring rod and the lower U-shaped stirring rod to rotate, so as to quickly complete the stirring of the backwash water, improve the reaction speed of the backwash water with the coagulant and flocculant, and finally filter the floccules and other impurities, which can efficiently remove impurities such as suspended matter in the backwash water, and has a good purification effect. The purified backwash water can be recycled and recycled, thereby reducing water consumption and having the effect of saving water resources. In summary, the utility model has the advantages of high working efficiency, good purification effect and ability to save water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the stirring plate 21 in the present utility model;

[0015] In the figure: 1-treatment tank, 2-water inlet, 3-outer cylinder, 4-inner cylinder, 5-annular coagulation zone, 6-annular flocculation zone, 7-central filtration zone, 8-dual-axis motor, 9-upper U-shaped stirring rod, 10-lower U-shaped stirring rod, 11-slag hopper, 12-open tank, 13-central tube, 14-filtration chamber, 15-oblique tube filler, 16-filter screen, 17-activated carbon, 18-water retaining ring, 19-annular water receiving trough, 20-vertical pipe, 21-stirring plate, 22-vibrator, 23-connecting pipe. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the present invention belong to the protection scope of the present invention.

[0017] like Figures 1-2 As shown, the utility model comprises a treatment tank 1 and a water inlet 2 arranged on the side wall of the treatment tank 1. The treatment tank 1 is a structure with an open top. The internal space of the treatment tank 1 is divided into an annular coagulation area 5, an annular flocculation area 6 and a central filtration area 7 from the outside to the inside in sequence by an outer cylinder 3 and an inner cylinder 4. The height of the outer cylinder 3 is lower than the height of the treatment tank 1, and the height of the inner cylinder 4 is lower than the height of the outer cylinder 3. A double-shaft motor 8 is installed on the outer cylinder 3 through a bracket. The double-shaft motor 8 is an existing device and can be purchased on the market according to parameters such as power and speed. It can be installed. An inverted upper U-shaped stirring rod 9 is arranged on the upper output shaft of the dual-axis motor 8, and an inverted lower U-shaped stirring rod 10 is arranged on the lower output shaft. The lower end of the upper U-shaped stirring rod 9 extends into the annular coagulation zone 5, and the lower end of the lower U-shaped stirring rod 10 extends into the annular flocculation zone 6. A filtering mechanism is arranged in the central filtering zone 7. The filtering mechanism is an existing structure, which is used to filter floccules and impurities in the backwash water, thereby achieving the purpose of purifying the backwash water, and facilitating the subsequent recovery and recycling of the backwash water.

[0018] When the utility model is in use, the backwash water of the coking plant circulating water is introduced into the annular coagulation zone 5 through the water inlet 2, the corresponding coagulant is added, the double-axis motor 8 is started, and the upper U-shaped stirring rod 9 is driven to rotate. The upper U-shaped stirring rod 9 rotates along the annular coagulation zone 5 to fully stir the backwash water and the coagulant in the annular coagulation zone 5, so that the suspended matter and other particulate impurities in the backwash water are aggregated to form a larger flocculent body. After stirring for a period of time, with the continuous introduction of the backwash water and the rise of the water level, the backwash water in the annular coagulation zone 5 will overflow along the upper end of the outer cylinder 3 into the annular flocculation zone 6 At this time, driven by the dual-axis motor 8, the lower U-shaped stirring rod 10 rotates along the annular flocculation area 6, fully stirring the backwash water and the corresponding flocculant in the annular flocculation area 6, further promoting the aggregation of tiny particles and suspended matter in the backwash water, increasing the volume of floccules, and improving the subsequent filtration efficiency and filtration effect of floccules and impurities. Then, it overflows along the upper end of the inner cylinder 4 to the central filtration area 7, and the filtering mechanism filters the backwash water to filter out the floccules in the backwash water, so as to achieve the purpose of purifying the backwash water, and the purified backwash water can be recovered and recycled. In the above process, the dual-axis motor 8 is used to simultaneously drive the upper U-shaped stirring rod 9 and the lower U-shaped stirring rod 10 to rotate, so as to quickly complete the stirring of the backwash water, improve the reaction speed of the backwash water with the coagulant and flocculant, and finally filter the floccules and other impurities, which can efficiently remove impurities such as suspended matter in the backwash water, and has a good purification effect. The purified backwash water can be recovered and recycled, thereby reducing the water consumption and having the effect of saving water resources.

[0019] The lower end of the inner tube 4 is provided with a slag hopper 11 extending to the bottom of the treatment tank 1. The filtering mechanism includes an open tank 12 and a central tube 13 which are coaxially arranged. A filter chamber 14, an inclined tube filler 15, a filter screen 16 and activated carbon 17 are arranged in the open tank 12 from bottom to top. The filter chamber 14 is a hollow cavity, and filter holes are processed on the bottom and side walls of the filter chamber 14. The upper end of the central tube 13 extends into the open tank 12 above the activated carbon 17, and the lower end of the central tube 13 is bent and extends out of the outside of the slag hopper 11. During operation, the backwash water undergoes sufficient flocculation reaction in the annular flocculation area 6, and then overflows along the upper end of the inner tube 4 into the central filter area 7, first enters the filter cavity 14 through the filter holes, filters the backwash water for the first time, blocks the flocculants and impurities outside the filter holes, and then continues to be filtered through the inclined tube filler 15, the filter screen 16 and the activated carbon 17 in sequence, so that the backwash water can be better filtered and purified, and the odor in the backwash water can be removed.

[0020] A water retaining ring 18 is provided at the upper part of the inner wall of the inner cylinder 4. When the utility model is in operation, the floccules in the backwash water will settle in the slag bucket 11. When the backwash water overflows from the annular flocculation area 6 to the central filtration area 7, it may stir the sediment in the slag bucket 11, thereby affecting the sedimentation effect of the floccules and impurities in the slag bucket 11. In order to avoid this problem, a water retaining ring 18 is provided to block and buffer the backwash water flowing downward, thereby reducing the impact and stirring of the water flow on the sediment.

[0021] In order to facilitate the disassembly, assembly and cleaning of the open tank 12, a plurality of support plates are evenly distributed on the circumference of the outer wall of the open tank 12. The support plates are connected to the water retaining ring 18 by bolts and nuts, and only the bolts and nuts need to be loosened or tightened.

[0022] Taking into account that during the filtration process, as the use time increases, some floccules and impurities will adhere to the filter holes on the side walls and bottom of the filter chamber 14, and even cause blockage of the filter holes, thereby reducing the filtration efficiency of the backwash water. In severe cases, the system cannot operate normally. In order to avoid the above problems, a vibrator 22 is provided at the bottom of the open tank 12, and the vibration is transmitted to the open tank 12 through the vibrator 22, thereby shaking off the floccules and impurities adhered to the tank wall of the open tank 12, thereby ensuring the filtration efficiency of the backwash water.

[0023] An annular water receiving trough 19 is provided at the upper end of the side wall of the outer cylinder 3 , and a plurality of vertical pipes 20 are evenly distributed on the circumference of the bottom of the annular water receiving trough 19 . The lower ends of the vertical pipes 20 extend into the lower part of the annular flocculation area 6 , and the water inlet 2 is located at the lower part of the side wall of the treatment tank 1 . During operation, the backwash water in the annular coagulation zone 5 flows into the annular flocculation zone 6 by overflow, which may cause part of the backwash water to flow directly into the central filtration zone 7 before it has time to flow to the lower part of the annular flocculation zone 6, thereby causing the suspended matter and impurities in the backwash water to not be fully polymerized, thereby reducing the subsequent filtration efficiency. To prevent this from happening, an annular water receiving trough 19 and a vertical pipe 20 are provided. The backwash water will overflow from the annular coagulation zone 5 into the annular water receiving trough 19, and then flow directly into the lower part of the annular flocculation zone 6 through the vertical pipe 20, thereby ensuring that the backwash water can undergo sufficient flocculation reaction with the flocculant, thereby improving the filtration efficiency of the backwash water. Similarly, the water inlet 2 is provided at the lower part of the treatment tank 1, so that the backwash water directly passes into the lower part of the annular coagulation zone 5, thereby ensuring that the backwash water can undergo sufficient flocculation reaction with the coagulant.

[0024] The lower ends of the upper U-shaped stirring rod 9 and the lower U-shaped stirring rod 10 are both obliquely provided with stirring plates 21. The stirring plates 21 have two functions. One is to stir the backwash water to improve the reaction efficiency of the backwash water with the coagulant and flocculant. The other is to stir the bottom of the annular coagulation zone 5 and the annular flocculation zone 6 to prevent floccules and impurities from settling at the bottom of the annular coagulation zone 5 and the annular flocculation zone 6 and occupying a large amount of space, thereby ensuring that there is always enough space inside the annular coagulation zone 5 and the annular flocculation zone 6 to ensure that the backwash water and the coagulant and flocculant can be fully reacted.

[0025] When all the backwash water has been purified, there will still be backwash water in the annular coagulation zone 5 and the annular flocculation zone 6. In order to purify all the backwash water, connecting pipes 23 are provided between the bottom of the annular coagulation zone 5 and the annular flocculation zone 6, and between the bottom of the annular flocculation zone 6 and the central filtration zone 7. The connecting pipes 23 are provided with water pumps. When in use, the backwash water in the annular coagulation zone 5 is first pumped into the annular flocculation zone 6 through the connecting pipes 23, and then the backwash water remaining in the annular flocculation zone 6 is pumped into the central filtration zone 7, thereby completing the purification of all the backwash water.

Claims

1. A coking plant circulating water backwash water purification and recovery treatment system, comprising a treatment tank (1) and a water inlet (2) arranged on the side wall of the treatment tank (1), characterized in that The treatment tank (1) is a structure with an open top. The internal space of the treatment tank (1) is divided into an annular coagulation zone (5), an annular flocculation zone (6) and a central filtration zone (7) from the outside to the inside by an outer cylinder (3) and an inner cylinder (4). The height of the outer cylinder (3) is lower than the height of the treatment tank (1), and the height of the inner cylinder (4) is lower than the height of the outer cylinder (3). A double-shaft motor (8) is mounted on the outer cylinder (3) through a bracket. An inverted upper U-shaped stirring rod (9) is arranged on the upper output shaft of the double-shaft motor (8), and an inverted lower U-shaped stirring rod (10) is arranged on the lower output shaft. The lower end of the upper U-shaped stirring rod (9) extends into the annular coagulation zone (5), and the lower end of the lower U-shaped stirring rod (10) extends into the annular flocculation zone (6). A filtering mechanism is arranged in the central filtration zone (7).

2. A coking plant circulating water backwash water purification and recovery treatment system according to claim 1, characterized in that The lower end of the inner cylinder (4) is provided with a slag bucket (11) extending to the bottom of the treatment tank (1); the filtering mechanism comprises an open tank (12) and a central tube (13) arranged coaxially; a filter chamber (14), an inclined tube filler (15), a filter screen (16) and activated carbon (17) are arranged in sequence from bottom to top in the open tank (12); the filter chamber (14) is a hollow cavity; filter holes are processed on the bottom and side walls of the filter chamber (14); the upper end of the central tube (13) extends into the open tank (12) above the activated carbon (17); and the lower end of the central tube (13) is bent and extends out of the outer side of the slag bucket (11).

3. A coking plant circulating water backwash water purification and recovery treatment system according to claim 2, characterized in that A water retaining ring (18) is provided on the upper portion of the inner wall of the inner cylinder (4).

4. A coking plant circulating water backwash water purification and recovery treatment system according to claim 3, characterized in that A plurality of support plates are evenly distributed on the circumference of the outer wall of the open tank (12), and the support plates are connected to the water retaining ring (18) by bolts and nuts.

5. A coking plant circulating water backwash water purification and recovery treatment system according to claim 2, characterized in that A vibrator (22) is provided at the bottom of the open tank (12).

6. A coking plant circulating water backwash water purification and recovery treatment system according to claim 1, characterized in that An annular water receiving trough (19) is provided at the upper end of the side wall of the outer cylinder (3), a plurality of vertical pipes (20) are evenly distributed around the bottom circumference of the annular water receiving trough (19), the lower ends of the vertical pipes (20) extend into the lower part of the annular flocculation zone (6), and the water inlet (2) is located at the lower part of the side wall of the treatment tank (1).

7. A coking plant circulating water backwash water purification and recovery treatment system according to claim 1, characterized in that The lower ends of the upper U-shaped stirring rod (9) and the lower U-shaped stirring rod (10) are both provided with stirring plates (21) in an inclined manner.

8. The coking plant circulating water backwash water purification and recovery treatment system according to claim 1 is characterized in that A connecting pipe (23) is provided between the bottom of the annular coagulation zone (5) and the annular flocculation zone (6), and between the bottom of the annular flocculation zone (6) and the central filtration zone (7), and a water pump is provided on the connecting pipe (23).

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