Anaerobic, aerobic and air flotation reaction system, reactor and three-phase separator

Abstract

The invention discloses an anaerobic, aerobic and air flotation reaction system, a reactor and a three-phase separator, the three-phase separator comprises at least one separation unit, the separation unit comprises a plurality of dome inclined plates and a fixing system, the plurality of dome inclined plates are arranged in an array along a first direction, and the fixing system is used for connecting and fixing the plurality of dome inclined plates. The dome inclined plate comprises a long inclined plate, a middle plate and a short inclined plate, the middle plate is connected with the long inclined plate and the short inclined plate, and the inner walls of the long inclined plate, the middle plate and the short inclined plate define an overflowing channel. The arc-shaped top plate is obliquely arranged, so that the overflowing channel obliquely extends to form an included angle with a second direction; wherein the first direction is perpendicular to the second direction. The anaerobic, aerobic and air flotation reaction system, the reactor and the three-phase separator are short in gas phase retention time, good in gas-liquid-solid three-phase separation effect, free of extra equipment and power requirements and low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an anaerobic, aerobic, air flotation reaction system, a reactor and a three-phase separator. Background Art

[0002] As we all know, the process of water treatment often needs to solve the problem of gas-liquid-solid three-phase separation, for example: (1) In the anaerobic treatment process, anaerobic sludge belongs to the solid phase, the generated biogas belongs to the gas phase, and water belongs to the liquid phase; (2) In the aerobic treatment process, aerobic sludge belongs to the solid phase, the bubbles of oxygenated aeration belong to the gas phase, and the treated water belongs to the liquid phase. (3) In the flotation treatment system, the flocculant and the pollutants in the water form a flocculent solid phase, the bubbles generated by the pressure-dissolved water under reduced pressure (pressure dissolved air flotation), the bubbles generated by the electrodes in the electrolysis process (electrolytic flotation), and the bubbles released under vacuum conditions (vacuum flotation) belong to the gas phase. The water separated from the solid phase and the gas phase belongs to the produced water after flotation purification.

[0003] At present, the three-phase separators for anaerobic treatment mostly adopt the herringbone plate structure, which is complex in structure. The main problems are: (1) The installation and positioning of each herringbone plate must be very accurate to ensure that the overlap distance remains unchanged. When the spacing is uneven, water will flow from the place with small resistance and wide gap, making the separation efficiency worse; (2) After installation, the three-phase separator is also subject to relatively large buoyancy and requires multiple points of anchoring. The investment in the equipment bracket is huge, which is equivalent to the cost of the three-phase separator; (3) The herringbone plate is welded by multiple plates, which is difficult to process and prone to weld cracking.

[0004] The current aerobic treatment unit completes the three-phase separation process as follows: after aeration is stopped, the bubbles are separated from the liquid phase and the solid phase is quickly separated and released; the produced water carrying the solid biological sludge slowly settles and separates from the effluent under the action of gravity. The subsequent mud-water mixture is separated in a sedimentation tank, and the sludge needs to be pumped back after separation. At present, the most mature process for aerobic treatment is the activated sludge method including a secondary sedimentation tank. The main problems of this process are: (1) It is necessary to build a new separation unit sedimentation tank outside the aerobic tank; (2) It is necessary to consume power to return the sludge from the secondary sedimentation tank to the front section of the aerobic reaction tank; (3) The harmful gases on the liquid surface of the aerobic tank (foam entrained with some microorganisms) need to be collected and treated separately by a gas collection hood; (4) Due to the limited area and separation capacity of the secondary sedimentation tank, the sludge concentration in the aerobic tank can generally only reach 3-4.5g / L.

[0005] The working principle of the current dissolved air flotation system is: (1) Add chemicals to condense pollutants in the water into large flocs; (2) Use tiny bubbles to adhere to pollutants; (3) The density of solid pollutants attached to the bubbles is lower than that of water, and they are separated from the treated water under the action of buoyancy. In order to meet the separation requirements, the flotation equipment needs a certain surface area to operate well, and the scum (mixed solids and gases) of the dissolved air flotation floats on the water surface of the separation zone and needs to be scraped off the water surface with scraping equipment for separate treatment. The main problems currently faced by flotation are: (1) The slag layer area and the separation area are both relatively large. The collection of slag requires scraping machinery (rectangular tanks have crane scrapers and chain scrapers, and circular tanks have rotary drum scrapers) and high power consumption; (2) When mechanical scraping, part of the water must be scraped out, and the slag is carried out under the flow of water. Therefore, the solid phase after scraping and separation contains a large amount of water, which indirectly increases the cost of slag treatment; (3) The concentration of harmful gases in the slag area is relatively high, and it is generally necessary to cover and seal it. The sealed environment greatly increases the difficulty of maintaining the chain and scraper. Summary of the invention

[0006] Based on this, it is necessary to address the problem of poor gas-liquid-solid three-phase separation and high cost in the existing water treatment process, involving an anaerobic, aerobic, flotation reaction system, a reactor and a three-phase separator.

[0007] A three-phase separator, comprising: at least one separation unit, the separation unit comprising a plurality of dome inclined plates and a fixing system, the plurality of dome inclined plates being arranged in an array along a first direction, the fixing system being used to connect and fix the plurality of dome inclined plates;

[0008] The dome inclined plate includes a long inclined plate, a middle plate and a short inclined plate, the middle plate connects the long inclined plate and the short inclined plate, and the inner walls of the long inclined plate, the middle plate and the short inclined plate form a flow passage;

[0009] The arc-shaped top plate is tilted so that the flow passage extends tiltedly to form an angle with the second direction; wherein the first direction is perpendicular to the second direction.

[0010] In one embodiment, the width of the opening between the long inclined plate and the short inclined plate is smaller than the equivalent diameter of the flow channel.

[0011] In one embodiment, when a plurality of the dome sloping plates are arranged in an array along the first direction, the heights of two adjacent dome sloping plates are different.

[0012] In one of the embodiments, the dome inclined plate is inclined toward the first direction, and the long inclined plate of the dome inclined plate forms an angle with the first direction.

[0013] In one embodiment, after the dome inclined plate is unfolded, the side of the lower end of the dome inclined plate includes multiple segments, and the multiple segments are not located on the same straight line, so that the side of the dome inclined plate is parallel to the inner wall of the pool body.

[0014] In one of the embodiments, the fixing system includes a mounting plate and a fixing member, the mounting plate is provided with a mounting groove for the dome inclined plate to be inserted, and the fixing member is used to connect the dome inclined plate to the mounting plate.

[0015] In one embodiment, the fixing system includes a through-rod, a distance block and an end fixing piece. The through-rod is passed through a plurality of dome inclined plates. The distance block is sleeved on the through-rod to position two adjacent dome inclined plates. The end fixing piece is used to lock the two ends of the through-rod.

[0016] A reactor, comprising:

[0017] A cell body, in which a partition wall is provided to separate the gas collecting area, and a reaction area and a separation area are also provided in the cell body in upper and lower distributions; and

[0018] The three-phase separator as described in any one of the above items is installed in the separation zone, the lower end of the dome inclined plate is close to the inner wall of the pool body, and the higher end of the dome inclined plate passes through the partition wall along the second direction and extends into the gas collection area.

[0019] In one of the embodiments, when there is no water distribution and aeration facility at the bottom of the gas collection zone, the gas collection zone is provided with a stirring system; or the gas collection zone is provided with a guiding slope for returning the solid sludge to the reaction zone.

[0020] In one of the embodiments, a mounting gap is formed between the lower end of the dome inclined plate and the inner wall of the pool body, and an air guide bracket is provided on the inner wall of the pool body at the lower part of the mounting gap.

[0021] In one embodiment, the separation unit is provided in plurality, and the plurality of separation units are stacked in multiple layers; or an inclined plate filler is provided on the top of the separation unit.

[0022] In one of the embodiments, a blocking structure for blocking a port of the flow channel is provided at a lower end of the dome inclined plate.

[0023] In one of the embodiments, at least one group of separation units is provided along the first direction, each group of separation units includes two symmetrically arranged separation units, and an air guide bracket is provided at the lower part of the installation gap between the two separation units.

[0024] An anaerobic reaction system comprises: a reactor as described in any one of the above, a water inlet system, a water outlet system and a gas collection system, wherein the water inlet system is used to provide water to be treated to the reaction zone, the water outlet system is used to discharge the water treated in the separation zone, and the gas collection system is used to collect the gas in the gas collection zone.

[0025] An aerobic reaction system comprises: a reactor as described in any one of the above, a water inlet system, a water outlet system, a gas collection system and an oxygenation system, wherein the water inlet system is used to provide water to be treated to the reaction zone, the water outlet system is used to discharge the water treated in the separation zone, the gas collection system is used to collect the gas in the gas collection zone, and the oxygenation system is used to provide oxygen to the reaction zone.

[0026] A flotation reaction system, comprising: a reactor as described in any one of the above, a water inlet system, a water outlet system, a gas collection system and a gas dissolving system, wherein the water inlet system is used to provide water to be treated to the reaction zone, the water outlet system is used to discharge the water treated in the separation zone, the gas collection system is used to collect the gas in the gas collection zone, and the gas dissolving system is used to dissolve a portion of the treated water and then circulate it back to the reaction zone.

[0027] A reactor, comprising:

[0028] A cell body, in which a separator is arranged, wherein the separator itself or the separator and the inner wall of the cell body form an annular separation zone, the outside of the separator forms a gas collection zone, and the lower part of the separator is provided with a reaction zone;

[0029] The three-phase separator as described in any one of the above items is installed in the separation zone, the lower end of the dome inclined plate is close to the inner wall of the isolation member, and the higher end of the dome inclined plate passes through the isolation member along the second direction and extends into the gas collection zone.

[0030] In the above-mentioned anaerobic, aerobic, flotation reaction system, reactor and three-phase separator, a solid, liquid and gas three-phase mixed liquid enters the dome inclined plate, and the long inclined plate uses the "shallow pool" theory of the inclined plate to separate a part of the solid sludge and slide it into the reaction area, and then the gas, liquid and solid three-phases enter the flow channel surrounded by the inner walls of the long inclined plate, the middle plate and the short inclined plate, and the gas phase is separated here. Since the flow channel extends obliquely and forms an angle with the second direction, the separated gas flows rapidly from low to high and is discharged to the gas collection area for collection. Finally, the treated water and mud are separated by liquid-solid precipitation on the upper part of the dome inclined plate. The gas phase residence time is short, and the gas-liquid-solid three-phase separation effect is better. At the same time, there is no additional equipment and power requirement, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0032] Figure 1 is a schematic structural diagram of a reactor in one embodiment;

[0033] Figure 2 for Figure 1 A schematic cross-sectional view of the separation unit;

[0034] Figure 3 for Figure 2 A side view of the separation unit after installation is shown;

[0035] Figure 4 for Figure 2 Schematic diagram of the structure of the inclined plate of the middle dome;

[0036] Figure 5 Schematic diagram of various forms of the middle plate of the dome inclined plate;

[0037] Figure 6 is a schematic diagram of an embodiment of a fixing system;

[0038] Figure 7 is a schematic diagram of another embodiment of the fixing system;

[0039] Figure 8 for Figure 2 Schematic diagram of the contraction arrangement of the openings of the middle dome sloping plate;

[0040] Fig. 9 for Figure 2 A schematic diagram of the middle dome inclined plate being arranged in a staggered manner along a first direction;

[0041] Fig.10 It is a schematic diagram of another opening contraction of the dome inclined plate;

[0042] Fig.11 for Fig.10 A schematic diagram showing the dome sloping plate being fixed by a fixing system;

[0043] Fig.12 The figure is a schematic diagram of the preparation of a dome inclined plate raw material;

[0044] Fig.13 It is a schematic diagram showing that the side of the dome inclined plate is parallel to the inner wall of the pool body;

[0045] Fig.14 Schematic diagram of designing multiple layers for the separation unit;

[0046] Fig.15 It is a schematic diagram of the different inclination directions of the adjacent dome inclined plates in the multi-layer separation unit;

[0047] Fig.16 Schematic diagram of designing inclined plate packing for the top of the separation unit;

[0048] Fig.17 A schematic diagram of two separation units symmetrically arranged along a first direction;

[0049] Fig.18 It is a schematic diagram of two separation units being symmetrically arranged and tilted toward the symmetry axis when the pool body is circular;

[0050] Fig.19 Schematic diagram of the mixing system designed for the gas gathering area;

[0051] Fig. 20 Schematic diagram of the plugging structure designed for the port of the dome sloping plate;

[0052] Fig.21 is a schematic structural diagram of an anaerobic reaction system in one embodiment;

[0053] Fig. 22 is a schematic structural diagram of an aerobic reaction system in one embodiment;

[0054] Fig.23 is a schematic structural diagram of an air flotation reaction system in one embodiment;

[0055] Fig.24 for Fig.23 A schematic structural diagram of the air flotation reaction system from another perspective;

[0056] Fig.25 A schematic diagram of the structure of a reactor in another embodiment;

[0057] Fig.26 for Fig.25 Schematic diagram of another view of the reactor shown.

[0058] Reference numerals:

[0059] 1-first direction, 2-second direction, 3-third direction, 4-central axis, 10-tank body, 11-partition wall, 12-gas collecting area, 13-reaction area, 14-separation area, 15-gas guide leg, 16-blocking structure, 17-isolator, 20-three-phase separator, 21-separation unit, 22-dome inclined plate, 221-long inclined plate, 222-middle plate, 223-short inclined plate, 224-flow channel, 23-fixing system, 231-mounting plate, 232-installation groove, 233-fixing part, 234-connecting rod, 235-distance block, 236-end fixing part, 30-support system, 40-stirring system, 42-guide slope, 50-water inlet system, 52-water inlet pipe, 60-water outlet system, 70-gas collection system, 80-aeration system, 82-aeration pipe, 84-aeration head, 90-dissolved air system, 92-water circulation pump, 94-dissolved air tank, 96-air pump, 98-dissolved air release head. DETAILED DESCRIPTION

[0060] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the invention is not limited by the specific implementation disclosed below.

[0061] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0063] See also Figure 1 The reactor in one embodiment includes a cell body 10 and a three-phase separator 20. The cell body 10 is provided with a partition wall 11 to be divided into two parts, one side is a gas collecting area 12, and the other side has a reaction area 13 and a separation area 14 distributed up and down, the reaction area 13 is located in the middle and lower part, the separation area 14 is located in the middle and upper part, and the three-phase separator 20 is installed in the separation area 14.

[0064] Please also read Figure 2 and Figure 3 The three-phase separator 20 includes at least one separation unit 21, and the separation unit 21 includes a plurality of dome inclined plates 22 and a fixing system 23. The plurality of dome inclined plates 22 are arranged in an array along a first direction 1, and the fixing system 23 is used to connect and fix the plurality of dome inclined plates 22.

[0065] Please also read Figure 4 In one embodiment, the dome inclined plate 22 includes a long inclined plate 221, a middle plate 222 and a short inclined plate 223. The middle plate 222 is located between the long inclined plate 221 and the short inclined plate 223, the middle plate 222 connects the long inclined plate 221 and the short inclined plate 223, and the inner walls of the long inclined plate 221, the middle plate 222 and the short inclined plate 223 form a flow passage 224.

[0066] The dome inclined plate 22 is tilted so that the flow channel 224 extends obliquely to form an angle with the second direction 2. The lower end of the dome inclined plate 22 is close to the inner wall of the pool body 10, and the higher end of the dome inclined plate 22 passes through the partition wall 11 along the second direction 2 and extends into the gas collection area 12. The first direction 1 is perpendicular to the second direction 2. Specifically, in this embodiment, the first direction 1 is the width direction of the pool body 10, and the second direction 2 is the length direction (horizontal direction) of the pool body 10.

[0067] The water to be treated enters the tank body 10 and mixes with the biological sludge in the tank body 10. After being decomposed and purified by microorganisms, the solid, liquid and gas three-phase mixed liquid rises and enters between the dome inclined plates 22. The long inclined plate 221 uses the "shallow pool" theory of the inclined plate to separate a part of the solid sludge. Then, the solid, liquid and gas three-phase mixed liquid enters the flow channel 224 surrounded by the inner walls of the long inclined plate 221, the middle plate 222 and the short inclined plate 223. The gas phase is separated here. Due to the inclination of the flow channel 224, the gas phase is separated. The extension forms an angle with the second direction 2, and the separated gas flows rapidly from low to high. The gas enters the gas collection area 12 for collection and discharge for centralized treatment. The treated water and mud are finally separated by liquid-solid precipitation at the top of the dome inclined plate 22. The collected gas will also carry a part of the solid sludge into the gas collection area 12. Due to the low density of the bubbles, the liquid level in this area will be higher than the liquid level in the reaction and separation area 14. Under the action of the liquid level difference, the excess sludge entering the gas collection area 12 can flow back to the reaction area 13.

[0068] Please also read Figure 5 In one embodiment, the shape of the middle plate 222 can be specifically set as needed. For example, the middle plate 222 can be a flat plate or a combination of multiple plates, or an arc or a combination of an arc and a flat plate. It is best when the middle plate 222 is an arc and tangent to the long inclined plate 221 and the short inclined plate 223, the resistance of the flow channel 224 is small, and the solid sludge deposited on the top of the dome inclined plate 22 can slide down.

[0069] Please also read Figure 6 In one embodiment, the fixing system 23 includes a mounting plate 231 and a fixing member 233. The mounting plate 231 is provided with a plurality of mounting grooves 232 with intervals, the dome inclined plate 22 is inserted into the mounting grooves 232, and the fixing member 233 is used to connect the dome inclined plate 22 with the mounting plate 231. Specifically, the fixing member 233 is L-shaped, one end of the fixing member 233 is fixed to the mounting plate 231 by bolting, welding or bonding, and the other end of the fixing member 233 is fixedly connected to the dome inclined plate 22 after being attached to the dome inclined plate 22.

[0070] Please also read Figure 7 In another embodiment, the fixing system 23 includes a connecting rod 234, a distance block 235 and an end fixing piece 236. The dome inclined plate 22 is provided with a through hole, the connecting rod 234 is inserted into a plurality of dome inclined plates 22, the distance block 235 is sleeved on the connecting rod 234, and the distance block 235 is located between two adjacent dome inclined plates 22, and is used to position the two adjacent dome inclined plates 22. The end fixing piece 236 is used to lock the two ends of the connecting rod 234 to prevent the dome inclined plate 22 and the distance block 235 from being loosened from the connecting rod 234. Among them, the dome inclined plate 22 is fixed as a whole by the fixing system 23, and the installation and positioning of the dome inclined plate 22 are very accurate, which can ensure that the spacing between the two adjacent dome inclined plates 22 is the same, and the separation effect is ensured. In addition, the distance block 235 can not only accurately position, but also ensure the working inclination angle of the arc top inclined plate 22.

[0071] Please also read Figure 8 In one embodiment, the dome inclined plate 22 is inclined toward the first direction 1, and the long inclined plate 221 of the dome inclined plate 22 forms an angle with the first direction 1. The dome inclined plate 22 is installed obliquely to increase the flow area of ​​the mixed liquid, shorten the separation time, and improve the separation effect.

[0072] Please also read Fig. 9 In one embodiment, when a plurality of dome inclined plates 22 are arranged in an array along the first direction 1, the heights of two adjacent dome inclined plates 22 on the same section are different. The dome inclined plates 22 are staggered to increase the flow area of ​​the mixed liquid, improve the separation efficiency, and reduce the influence of the installation grooves 232 on the strength of the installation plate 231.

[0073] In one embodiment, the dome inclined plate 22 is formed by processing a whole plate, and there is no weak joint point such as welding seam on the plate, so the processing difficulty is relatively low, and the phenomenon of gas leakage can be avoided. Specifically, the dome inclined plate 22 can be produced by stamping, or by extrusion or injection molding.

[0074] In one embodiment, the width of the long inclined plate 221 is 200-1500 mm, and the length can be similar to the span of the separation zone 14. The diameter (or equivalent diameter) of the flow channel 224 is 20-500 mm. The smaller the angle between the long inclined plate 221 and the first direction 1, the better the gas-liquid separation effect, but solid sludge is easy to accumulate on the upper surface of the long inclined plate 221. In actual operation, the angle between the long inclined plate 221 and the first direction 1 is 45-75°.

[0075] Please also read Figure 8 , Fig.10 and Fig.11 In one embodiment, the width of the opening between the long inclined plate 221 and the short inclined plate 223 is smaller than the equivalent diameter of the flow channel 224, wherein the area of ​​the flow channel 224 is converted into the diameter of a circle of the same area as the equivalent diameter. In other words, the opening contraction design of the dome inclined plate 22 has a strong constraint on the gas-liquid mixed phase, which can reduce the risk of the gas-liquid mixed phase escaping from the flow channel 224 during the flow process, and the flow of the gas-entrained mixed phase has little interference with the nearby water flow.

[0076] Specifically, Figure 8 As shown, the end of the short inclined plate 223 gradually tilts toward the long inclined plate 221, so that the width of the opening between the long inclined plate 221 and the short inclined plate 223 is reduced. Fig.10 and Fig.11 As shown, alternatively, the middle plate 222 protrudes outward from the long inclined plate 221, and the long inclined plate 221 and the short inclined plate 223 are parallel to each other, thereby shortening the distance between the long inclined plate 221 and the short inclined plate 223 on the dome inclined plate 22. On the premise of keeping the area of ​​the flow channel 224 unchanged, the flow rate of the channel between the dome inclined plates 22 is increased, the treatment effect is improved, and the risk of escape from the flow channel 224 during the flow of the gas-liquid mixed phase is reduced.

[0077] Please refer again Figure 1 In one embodiment, since the dome inclined plate 22 is inclined, the flow channel 224 of the dome inclined plate 22 forms an angle with the second direction 2. Therefore, when the dome inclined plate 22 with a rectangular outer contour is installed in the pool body 10, a triangular space is formed between the side of the dome inclined plate 22 and the inner wall of the pool body 10. The dome inclined plate 22 has poor adhesion to the adjacent wall, and a small amount of bubbles are easily emitted.

[0078] See also Fig.12 and Fig.13 Therefore, the dome inclined plate 22 is formed by processing a special-shaped plate. After the dome inclined plate 22 is unfolded, the side of the lower end of the dome inclined plate 22 includes multiple segments, and the multiple segments are not located on the same straight line, so that the side of the dome inclined plate 22 is parallel to the inner wall of the pool body 10, ensuring the fit between the arc top inclined plate 22 and the adjacent wall.

[0079] Specifically, the middle plate 222 of the dome inclined plate 22 is a flat plate as an example for specific description. Among them, the side edges of the long inclined plate 221, the middle plate 222 and the short inclined plate 223 are not located on the same straight line, and the side edges of the long inclined plate 221 and the short inclined plate 223 are symmetrically arranged about the central axis 4 of the flow channel 224, and the side edges on both sides of the central axis 4 of the middle plate 222 are also symmetrical about the central axis 4. When the upward slope of the flow channel 224 of the dome inclined plate 22 is i, the boundary line between the long inclined plate 221 and the middle plate 222 forms a first angle arctg(i) with the second direction 2, and the short inclined plate 223 forms a second angle 2arctg(i) with the third direction 3, wherein the third direction 3 is the height direction of the pool body 10. The side edge of the middle plate 222 is perpendicular to the central axis 4 of the flow channel 224, and the side edge of the middle plate 222 forms a third angle arctg(i) with the third direction 3.

[0080] See also Fig.14 In one embodiment, in order to improve the separation effect of the three-phase separator 20, a plurality of separation units 21 can be provided, and the plurality of separation units 21 can be stacked in multiple layers along the third direction 3. When the number of dome inclined plates 22 increases, the bottom layer bears most of the bubble impact and the disturbance of the bubbles on the water, and the water flow in the upper layer presents a laminar flow state and is less disturbed, so the separation effect is better. Among the multiple layers of dome inclined plates 22, the directions in which the dome inclined plates 22 are inclined along the first direction 1 can be the same. Fig.15 As shown, the inclined directions of the two adjacent dome inclined plates 22 may be different to improve the separation effect.

[0081] Please also read Fig.16 In another embodiment, the top of the separation unit 21 may be designed with an inclined plate filler 24. Since the dome inclined plate 22 separates and discharges the gas phase, the inclined plate (inclined tube) filler 24 also increases the solid-liquid separation effect, so the overall water discharge effect is better. If there is flocculent sludge, the spacing between the inclined plates (inclined tubes) should be kept at more than 50 mm, otherwise the inclined tube or inclined tube may be blocked.

[0082] See also Fig.17 In one embodiment, at least one group of separation units 21 is provided along the first direction 1, and each group of separation units 21 includes two symmetrically arranged separation units 21, and an air guide bracket 15 is provided at the lower part of the installation gap between the two separation units 21. Of course, a single inclined plate can also be provided. When the width of the pool body 10 is wider, it is relatively difficult and costly to meet the installation plate 231 of this length. Therefore, the separation units 21 are divided into multiple groups along the first direction 1, which can reduce material requirements and costs. At the same time, two separation units 21 are grouped together, and each group of separation units 21 is symmetrically arranged, which can reduce the lateral flow in the pool body 10.

[0083] See also Fig.18On the basis of the above embodiment, the shape of the tank body 10 can be rectangular or circular. When the shape of the tank body 10 is circular, in addition to the symmetrical arrangement of the two separation units 21 in each group, the dome inclined plates 22 of the separation units 21 are inclined in the first direction 1 toward the direction close to the symmetry axis, so as to cover the circular surface, make full use of the space, and improve the separation effect.

[0084] See also Fig.19 In one embodiment, the three-phase separator 20 and the tank body 10 are fixed by connecting the overhead support system 30 in the tank body 10 to ensure the stability of the installation of the three-phase separator 20. When there is no mixing facility such as water distribution and aeration at the bottom of the gas collection area 12, there is a risk of sludge deposition. Therefore, the gas collection area 12 is provided with a mixing system 40 to control the mixing and circulation of sewage in the tank body 10. Fig.23 As shown, or alternatively, the gas collecting area 12 is provided with a guide slope 42 , and the guide slope 42 is inclined toward the reaction area 13 , and the guide slope 42 can return the sludge deposited in the gas collecting area 12 to the reaction area 13 .

[0085] See also Fig. 20 In one embodiment, a mounting gap is formed between the lower end of the dome inclined plate 22 and the inner wall of the tank body 10, and an air guide bracket 15 is provided on the inner wall of the tank body 10 at the lower part of the mounting gap. The bubbles at the lower part can be introduced into the coverage of the dome inclined plate 22 through the lower slope of the air guide bracket 15, and the sludge above the air guide bracket 15 can slide down through the upper slope of the air guide bracket 15 into the reaction zone 13.

[0086] In one embodiment, when the gas phase is less in the three-phase mixture, the port of the flow channel 224 at the lower end of the dome inclined plate 22 does not need to be blocked. On the contrary, blocking the port of the flow channel 224 is beneficial to improving the gas collection efficiency, that is, the lower end of the dome inclined plate 22 is provided with a blocking structure 16 for blocking the port of the flow channel 224.

[0087] Specifically, the plugging structure 16 can have three forms. The first is that a single dome inclined plate 22 is provided with a single plugging block. A through hole is provided on the plugging structure 16 that only allows the wall thickness of the dome inclined plate 22 to pass through, and the flow passage 224 is blocked. In addition, the top of the plugging structure 16 seals and isolates the side of the separation zone 14 that is susceptible to bubble interference, thereby preventing the gas escaping from the port of the flow passage 224 from affecting the separation effect, thereby improving the water quality of the separation zone 14. This method is fast to install and has a good plugging effect, but the investment is high. Fig. 20 shown.

[0088] The second method is to set a single blocking block on a single arc top inclined plate 22. This structure is more flexible in installation and is suitable for different layout schemes (inclination angle, spacing, etc.) of arc top inclined plates 22 of the same specification. The third blocking method is to construct a partition with a hole on the lower side of the arc top inclined plate 22. The lower sides of multiple arc top inclined plates 22 extend to the other side of the partition through the large holes on the plate. The small amount of lost gas rises through the separation of the partition, reducing the adverse effects on the separation effect of the separation zone 14.

[0089] See also Fig.21 The present invention also provides an anaerobic reaction system, which includes the above-mentioned reactor and a water inlet system 50, a water outlet system 60, and a gas collection system 70. The water inlet system 50 is connected to the lower part of the tank body 10, and the water inlet system 50 is used to provide water to be treated to the reaction zone 13. Specifically, the water inlet system 50 includes a water inlet pipe 52, which extends into the tank body 10, and is provided with a plurality of water outlet holes arranged at intervals along the axial direction, so as to evenly pass the water to be treated into the reaction zone 13.

[0090] The water outlet system 60 is connected to the upper part of the tank body 10. The treated gas, liquid and solid three phases are first degassed and separated by the three-phase separator 20 in the separation area 14, and then separated by liquid and solid precipitation through the top of the dome inclined plate 22. Finally, the produced water is discharged through the water outlet system 60. The gas collected by the three-phase separator 20 enters the gas collection area 12, and the gas collection system 70 is connected to the gas collection area 12. The gas collection system 70 collects and discharges the gas in the gas collection area 12 for centralized treatment.

[0091] The above-mentioned anaerobic reactor has at least the following advantages: (1) The complexity of the three-phase separator 20 of the anaerobic tank is reduced. (2) The effective separation area of ​​the tank body 10 is increased, and the three-phase separation effect is improved: the separation area of ​​the traditional UASB accounts for 30-40% of the total area, the IC process separation area of ​​the 5-layer three-phase separator 20 accounts for 50-60% of the total area, and the separation area of ​​the three-phase separator 20 of the present invention can reach 60-80% of the total area. (3) The three-phase separator 20 can be stacked for transportation, which greatly reduces the transportation cost. (4) The structure of the dome inclined plate 22 has no weak points in the weld seam, and there will be no problems such as desoldering and gas leakage. (5) The gas phase residence time of the three-phase separation zone 14 is short and the space occupied is small. Therefore, the buoyancy it receives during operation is very small, and its own gravity and buoyancy can be basically offset. It does not require too much fixed tension to accurately position and operate. (6) The installation of the dome inclined plate 22 can be completed by plugging in scattered parts, without the need for large lifting machinery, and the installation speed is fast and the positioning is accurate. (7) Adapt to the arrangement of tank bodies 10 of different lengths: First, the spacing of the dome inclined plates 22 is small and can be controlled within 200mm-300mm. The minimum spacing of the traditional three-phase separator 20 is 500mm; second, the length of the long inclined plate 221 of the edgemost dome inclined plate 22 can also be cut and adjusted, and assembled in the form of a partial plate (for example, 0.5 plates) to meet smaller space requirements. (8) A blast system is set at its lower part (for example, adding a biogas circulation fan) to increase the flow rate of gas and liquid in the flow channel 224 at the top of the dome inclined plate 22 and effectively flush it. (9) Due to the dense bubbles, the density of the gas-water mixed liquid is less than that of water, and the water level of the gas collection area 12 is much higher than that of the reaction area 13. The potential energy difference between the two can drive the sewage in the tank to circulate faster, providing a fluid dynamics basis for the cultivation of granular sludge. The rapid flow can increase the mass transfer rate and greatly improve the tank's ability to treat pollutants.

[0092] See also Fig. 22 The present invention also provides an aerobic reaction system, including the above-mentioned reactor and its water inlet system 50, water outlet system 60, gas collection system 70, and oxygenation system 80. The water inlet system 50 is connected to the lower part of the tank body 10, and the water inlet system 50 is used to provide the water to be treated to the reaction zone 13. The water outlet system 60 is connected to the upper part of the tank body 10, and the treated gas, liquid and solid three phases are first degassed and separated by the three-phase separator 20 in the separation zone 14, and then separated by liquid-solid precipitation in the upper part of the separation zone 14, and finally the produced water is discharged through the water outlet system 60. The gas collected by the three-phase separator 20 enters the gas collection zone 12, and the gas collection system 70 is connected to the gas collection zone 12, and the gas collection system 70 collects and discharges the gas in the gas collection zone 12 for centralized treatment. The oxygenation system 80 is used to provide oxygen to the reaction zone 13.

[0093] Specifically, the aeration system 80 includes an aeration pipe 82 and an aeration head 84 . The aeration pipe 82 extends into the bottom of the tank body 10 . The aeration head 84 is installed on the aeration pipe 82 to allow air or oxygen to flow into the reaction zone 13 .

[0094] The above-mentioned aerobic reaction system has at least the following advantages: (1) the number of independent unit sedimentation tanks for mud-water separation and sedimentation is reduced, thereby reducing engineering investment costs; (2) the sludge concentration of the aerobic sludge reaction tank is increased (can reach 6-8 grams), the treatment capacity of the sewage tank body 10 is increased, and the investment in water treatment per ton is reduced, making the treatment performance of the tank body 10 about twice as high; (3) the operating power consumption is reduced: first, the power consumption of sludge return flow in the sedimentation unit is reduced; second, the power consumption of mixed liquid return flow is reduced, because the density of the gas collection area 12 is reduced due to the concentration of bubbles, and its liquid level is higher than that of the reaction area 13, thereby achieving a large proportion of sludge and mixed liquid return. (4) Increase denitrification effect: Under aerobic conditions, ammonia nitrogen in the aeration zone is oxidized into nitrate nitrogen or nitrite nitrogen, and a large amount of sludge enters the gas collection area 12 along with the nitrate nitrogen. The dissolved oxygen concentration in the gas collection area 12 is controlled to be lower than 0.5 mg / L, and the nitrate nitrogen or nitrite nitrogen in the water is reduced to nitrogen gas and discharged. Under the action of aeration power, the system can carry out sufficient internal circulation and denitrification, and at the same time, the utilization rate of carbon source in the denitrification process is also increased.

[0095] See also Fig.23 and Fig.24 The present invention also provides a flotation reaction system, including the above reactor and its water inlet system 50, water outlet system 60, gas collection system 70, and gas dissolution system 90. The water inlet system 50 is connected to the tank body 10, and the water inlet system 50 is used to provide water to be treated into the tank body 10, and then send the water into the reaction zone 13 through the stirring structure. The pollutants in the water are condensed into large particles of flocs by adding chemicals, and the solid pollutants adhering to the bubbles have a density lower than that of water. Under the action of buoyancy, they enter the three-phase separator 20, and the flow channel 224 of the three-phase separator 20 separates the gas and scum and collects them in the gas collection zone 12, and the scum is discharged in a centralized manner.

[0096] The water outlet system 60 is connected to the upper part of the tank body 10. The treated water is discharged through the water outlet system 60 after the gas and scum are separated in the separation zone 14 by the three-phase separator 20. The gas collection system 70 is connected to the gas collection zone 12. The gas collection system 70 collects and centrally processes the gas in the gas collection zone 12. The gas dissolving system 90 is used to dissolve a portion of the treated water and circulate it back to the reaction zone.

[0097] Specifically, the gas dissolving system 90 includes a water circulation pump 92, a gas dissolving tank 94, an air pump 96 and a gas dissolving head 98. The water circulation pump 92 is used to extract the treated water and send it into the gas dissolving tank 94, and the air pump 96 is used to extract the gas and pump it into the gas dissolving tank 94. Due to the pressurization of the gas dissolving tank 94, the gas is dissolved in the water, and finally the gas-dissolving water is released into the reaction zone 13 through the gas dissolving head 98.

[0098] The above-mentioned flotation reaction system has at least the following advantages: (1) it saves the investment in scraping equipment and the power consumption of scraping; (2) it reduces the area of ​​the slag zone and the difficulty of collecting slag, which is more conducive to the control of gaseous pollutants; (3) it increases the concentration of slag, reduces the water content of discharged slag, and reduces the slag treatment cost; (4) the separation equipment has no mechanical moving parts, and is simple to maintain and easy to operate; (5) the top water discharge method eliminates the problem of traditional flotation bottom water discharge carrying precipitated pollutants, and there is no need to set a sludge hopper and sludge discharge system at the bottom of the pool. Even if there are pollutants that do not adhere to the flotation and sink to the pool body 10, they will not enter the water discharge system 60, but will continue to contact the dissolved air water multiple times until they enter the slag system and are discharged.

[0099] See also Fig.25 and Fig.26 The present invention further provides a reactor, comprising a cell body 10 and the above-mentioned three-phase separator 20. The difference between the reactor of this embodiment and the above-mentioned reactor is that the structure of the cell body 10 and the arrangement position of the three-phase separator 20 are different.

[0100] Specifically, a partition 17 is provided in the pool body 10, and the partition 17 protrudes from the water surface to a certain protective height, and the partition 17 itself or the inner wall of the pool body 10 forms an annular separation zone 14. In other words, the annular separation zone 14 can be surrounded by the partition 17 itself, or it can be surrounded by the partition 17 and the wall of the pool body 10. In one embodiment, the partition 17 can be made of a partition wall or a partition. The shape of the separation zone 14 can be specifically designed as needed, such as a rectangular, circular, elliptical or other regular or irregular shape.

[0101] The outer area between the partition 17 and the cell body 10 is the gas collection area 12, and the reaction area 13 is provided at the lower part of the partition 17. The three-phase separator 20 is installed in the separation area 14 surrounded by the partition 17, and the lower end of the dome inclined plate 22 is close to or in contact with the inner wall of the partition 17, and the higher end of the dome inclined plate 22 passes through the partition 17 along the second direction 2 and extends into the gas collection area 12.

[0102] The water to be treated enters the reaction zone 13 of the tank body 10 and mixes with the biological sludge of the tank body 10. After being decomposed and purified by microorganisms, the solid, liquid and gas three-phase mixed liquid rises and enters between the dome inclined plates 22. The long inclined plate 221 uses the "shallow pool" theory of the inclined plate to separate a part of the solid sludge. Then the solid, liquid and gas three-phase mixed liquid enters the flow channel 224 surrounded by the inner wall of the long inclined plate 221, the middle plate 222 and the short inclined plate 223. The gas phase is separated here. Since the flow channel 224 extends obliquely and forms an angle with the second direction 2, the separated gas flows rapidly from low to high, and the gas enters the gas collection area 12 for discharge. Finally, the treated water and mud are separated by liquid-solid precipitation at the top of the dome inclined plate 22, and the supernatant water is collected and discharged. If the gas discharged from the gas collection area 12 is harmless, it does not need to be collected. Otherwise, it can be collected centrally by adding a cover on the top of the tank body 10.

[0103] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A three-phase separator, characterized in that: include: At least one separation unit, the separation unit comprising a plurality of dome inclined plates and a fixing system, the plurality of dome inclined plates are arranged in an array along a first direction, and the fixing system is used to connect and fix the plurality of dome inclined plates; The dome inclined plate includes a long inclined plate, a middle plate and a short inclined plate, the middle plate connects the long inclined plate and the short inclined plate, and the inner walls of the long inclined plate, the middle plate and the short inclined plate form a flow passage; The arc-shaped top plate is tilted so that the flow passage extends tiltedly to form an angle with the second direction; wherein the first direction is perpendicular to the second direction.

2. The three-phase separator according to claim 1, characterized in that: The width of the opening between the long inclined plate and the short inclined plate is smaller than the equivalent diameter of the flow passage.

3. The three-phase separator according to claim 1, characterized in that: When the plurality of dome inclined plates are arranged in an array along the first direction, the heights of two adjacent dome inclined plates are different.

4. The three-phase separator according to claim 1, characterized in that: The dome inclined plate is inclined toward the first direction, and the long inclined plate of the dome inclined plate forms an angle with the first direction.

5. The three-phase separator according to claim 1, characterized in that: After the dome inclined plate is unfolded, the side of the lower end of the dome inclined plate includes a plurality of segments, and the plurality of segments are not located on the same straight line, so that the side of the dome inclined plate is parallel to the inner wall of the pool body.

6. The three-phase separator according to claim 1, characterized in that: The fixing system comprises a mounting plate and a fixing member, wherein the mounting plate is provided with a mounting groove for the dome inclined plate to be inserted, and the fixing member is used to connect the dome inclined plate with the mounting plate.

7. The three-phase separator according to claim 1, characterized in that: The fixing system includes a connecting rod, a distance block and an end fixing piece. The connecting rod is inserted into a plurality of dome inclined plates. The distance block is sleeved on the connecting rod for positioning two adjacent dome inclined plates. The end fixing piece is used to lock the two ends of the connecting rod.

8. A reactor, characterized in that: include: The cell body is provided with a partition wall to separate the gas collecting area, and the cell body is also provided with a reaction area and a separation area distributed up and down; and The three-phase separator as described in any one of claims 1 to 7 is installed in the separation zone, the lower end of the dome inclined plate is close to the inner wall of the pool body, and the higher end of the dome inclined plate passes through the partition wall along the second direction and extends into the gas collection area.

9. The reactor according to claim 8, characterized in that When there is no water distribution and aeration facility at the bottom of the gas collection zone, the gas collection zone is provided with a stirring system; or the gas collection zone is provided with a guiding slope for returning the solid sludge to the reaction zone.

10. The reactor according to claim 8, characterized in that An installation gap is formed between the lower end of the dome inclined plate and the inner wall of the pool body, and an air guide bracket is provided on the inner wall of the pool body at the lower part of the installation gap.

11. The reactor according to claim 8, characterized in that There are multiple separation units, and the multiple separation units are stacked in multiple layers; or a slanted plate filler is provided on the top of the separation unit.

12. The reactor according to claim 8, characterized in that A blocking structure for blocking the port of the flow passage is provided at the lower end of the dome inclined plate.

13. The reactor according to claim 8, characterized in that At least one group of separation units is provided along the first direction, each group of separation units includes two symmetrically arranged separation units, and an air guide bracket is provided at the lower part of the installation gap between the two separation units.

14. An anaerobic reaction system, characterized in that: include: The reactor, water inlet system, water outlet system and gas collection system as described in any one of claims 8 to 13, wherein the water inlet system is used to provide water to be treated to the reaction zone, the water outlet system is used to discharge the treated water in the separation zone, and the gas collection system is used to collect the gas in the gas collection zone.

15. An aerobic reaction system, characterized in that: include: The reactor, water inlet system, water outlet system, gas collection system and oxygenation system as described in any one of claims 8 to 13, wherein the water inlet system is used to provide water to be treated to the reaction zone, the water outlet system is used to discharge the treated water in the separation zone, the gas collection system is used to collect the gas in the gas collection zone, and the oxygenation system is used to provide oxygen to the reaction zone.

16. A flotation reaction system, characterized in that: include: The reactor, water inlet system, water outlet system, gas collection system and gas dissolution system as described in any one of claims 8 to 13, wherein the water inlet system is used to provide water to be treated to the reaction zone, the water outlet system is used to discharge the treated water in the separation zone, the gas collection system is used to collect the gas in the gas collection zone, and the gas dissolution system is used to dissolve a portion of the treated water and recycle it back to the reaction zone.

17. A reactor, characterized in that: include: A cell body, in which a separator is arranged, wherein the separator itself or the separator and the inner wall of the cell body form an annular separation zone, the outside of the separator forms a gas collection zone, and the lower part of the separator is provided with a reaction zone; The three-phase separator as described in any one of claims 1 to 7 is installed in the separation zone, the lower end of the dome inclined plate is close to the inner wall of the isolation member, and the higher end of the dome inclined plate passes through the isolation member along the second direction and extends into the gas collection zone.

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