CN201056518Y - Three-phase separator of upflow type anaerobic reactor - Google Patents

Abstract

The utility model relates to an up flow type triphase separator for anaerobic reactor, which comprises a conical guide shell arranged at the upper end of the anaerobic reactor and a gas hood arranged at the upper end of the conical guide shell. A circular passage is arranged between the cylinder walls of lower end of the gas hood wall and upper end of the conical guide shell, and a circular passage is arranged between the lower end of the conical guide shell and the upper cylinder wall of the anaerobic reactor cylinder body. The utility model combines two circular loops to carry out sludge/waste separation and gas/water separation in different sites, so as to lead good gas/sludge/water separation effect. The utility model avoids the problem of the conventional triphase separator, which is that the mixed liquid rising passage and the returned sludge flow share one passage, so that the returned sludge flow is influenced by the influent water to a large extent. The utility model can ensure stable liquid stream in the sedimentation section, and the flow regime of the water flow approaches to laminar flow, so as to lead good solid/liquid separation effect.

Description

Three-phase separator for upflow anaerobic reactor

technical field

The utility model relates to a three-phase separator of an upflow anaerobic reactor.

Background technique

Compared with traditional aerobic biological treatment technology, anaerobic biological treatment technology has high organic matter load, does not require a large amount of dilution water; high purification efficiency; less nutrient requirement; no aeration, low energy consumption, and low operating costs It has strong adaptability to impact load and environmental conditions; it can produce biogas as clean energy for recycling; the sludge yield is low, and the generated biological sludge is easy to dehydrate; the reactor volume is small and the floor area is small, etc. It has been widely used in the treatment of medium and high concentration organic wastewater in light industry, chemical industry, pharmaceutical and other industries, and achieved good results. The most successful application at present is the upflow anaerobic sludge bed reactor (UASB).

The wastewater enters the anaerobic reactor from the bottom of the pool through the water distributor, and in the reaction zone, the wastewater fully contacts with anaerobic microorganisms to produce a strong biochemical reaction, where organic matter is mainly decomposed by anaerobic bacteria into biogas (CH ₄ , CO ₂ , H ₂ O, etc.), generate a large number of tiny biogas bubbles, and the bubbles gradually converge and increase during the rising process, and carry sludge and water together to rise into the three-phase separator. The three-phase separator (gas, solid and liquid separator) is composed of a sedimentation area and a gas collection chamber (or gas collection hood). The gas is first separated and then enters the gas collection chamber (hood), and is discharged from the reactor through the biogas pipe; After the gas separation, the mud-water mixture enters the sedimentation area for solid-liquid separation, the waste water is discharged from the reactor from the outlet tank, and the settled anaerobic sludge returns to the reaction area from the return slot by gravity. The above separation of sludge, water, and biogas can be accomplished through a three-phase separator.

For high-efficiency anaerobic reactors, in order to ensure that a sufficient amount of sludge and good effluent quality can be maintained in anaerobic digestion units, a three-phase separator must be installed in these units. The quality of the separation effect of the three-phase separator directly affects the separation of gas, sludge and treated water in the device, thus affecting the success or failure of the reactor operation. Therefore, in the design of the reactor, the design of the three-phase separator is a very critical part. The three-phase separator widely used at home and abroad has the following problems:

The gas in the gas, sludge, and water mixture enters the sedimentation area, that is, the sludge and water mixture enters the sedimentation area, the gas is not effectively separated and removed, and the gas leaks into the sedimentation area to interfere with the solid-liquid separation effect. The sludge separated by precipitation cannot be quickly returned to the reactor, and the reactor cannot maintain a high sludge concentration and a long sludge age.

Contents of the invention

The technical solution to be solved by the utility model is to provide a method that can improve the separation effect of the biogas, sludge and water mixture in the anaerobic reactor, keep the liquid flow in the sedimentation area stable, and maintain a high sludge concentration and relatively high concentration in the reactor. Long sludge age, three-phase separator for upflow anaerobic reactor that improves equipment volume utilization.

The utility model adopts the following technical solutions:

The utility model is composed of a conical guide tube arranged at the upper end of the anaerobic tube and an air cover arranged at the upper end of the conical guide tube, and an annular channel is arranged between the lower end of the cover wall of the gas cover and the upper wall of the conical guide tube , an annular channel is provided between the lower end of the wall of the conical guide tube and the upper wall of the anaerobic reactor.

In the utility model, the sedimentation zone cylinder body arranged at the upper end of the reactor cylinder body and the reactor cylinder body are connected by an oblique reflector plate.

In the utility model, the cylinder wall of the anaerobic reactor cylinder corresponding to the position of the lower end of the cone-shaped guide cylinder wall is composed of oblique reflection plates.

The air chamber of the utility model and the wide opening of the conical guide cylinder constitute an air chamber, and an exhaust pipe is arranged on the top of the air shield.

The wide mouth of the conical guide tube of the utility model is embedded in the air cover.

In the utility model, the conical guide tube and the gas cover are fixedly arranged on the upper end of the reactor barrel through the supporting channel steel.

The positive effects of the utility model are as follows:

The utility model combines two annular passages to complete the mud-water separation and gas-water separation in different parts, and the separation effect of gas, sludge and water is good. Thus avoiding the problem that the mixed liquid ascending channel and the sludge return share a channel in the traditional three-phase separator, and the sludge return is greatly disturbed by the influent water flow.

Adopting the utility model can keep the liquid flow in the sedimentation area stable, and the flow state of the water flow is close to laminar flow, so that it has a good solid-liquid separation effect.

The circular wide mouth and cylindrical gas cover on the upper part of the conical guide tube of the utility model constitute a larger volume gas chamber and a larger gas-liquid separation interface, which can effectively reduce the release rate of biogas and discharge the reactor tube The amount of water vapor entrainment in the body.

With the utility model, the gas in the gas, sludge and water mixture will not enter the sedimentation area, that is, before the sludge and water mixture enters the sedimentation area, the gas can be effectively separated and removed to avoid interference caused by gas leakage into the sedimentation area Solid and liquid separation effect.

In the utility model, the sedimentation zone cylinder arranged at the upper end of the reactor cylinder and the reactor cylinder are connected by an oblique reflection plate, which effectively increases the volume of the precipitation zone. The sludge separated by sedimentation can be quickly returned to the reactor to maintain a high sludge concentration and a long sludge age in the reactor.

The sewage treatment station of North China Pharmaceutical Kangxin Co., Ltd. adopts an upflow anaerobic reactor with a three-phase separator of the utility model, with a total investment of 6.6 million yuan and an area of 6100m ² . It adopts "anaerobic-aerobic" biochemical process treatment For starch and vitamin B ₁₂ mixed wastewater, there are 4 500m ³ upflow anaerobic sludge bed reactors and 1 1000m ³ aerobic aeration tank. The treatment capacity of a single anaerobic reactor reaches 500m ³ /d, the average COD value of the influent is 10566mg/L, and the average COD value of the effluent is 992mg/L. At present, it has passed the acceptance of the State Environmental Protection Administration.

The sewage treatment station of the No. 1 plant of Langfang Meihua Monosodium Glutamate Co., Ltd. adopts the upflow anaerobic reactor with the utility model three-phase separator, with a total investment of 5.7 million yuan and an area of 5118m ² . The "anaerobic-aerobic" treatment process is adopted. Construct 4 GX-I type (500m ³ ) upflow anaerobic sludge bed reactors and 1 3200m ³ aerobic aeration tank. High-concentration organic wastewater is first treated with an anaerobic reactor. When the treatment capacity of a single anaerobic reactor is 680m ³ /d, the average COD value of the influent water for three months is 5632mg/L, and the average effluent COD value is 327mg/L. L. The effluent from the anaerobic reactor and low-concentration monosodium glutamate wastewater are mixed and treated by an aerobic aeration tank. The treatment capacity is 4500m ³ /d, the COD value of the influent water is 639mg/L, and the COD value of the effluent water is 146mg/L. Acceptance by Langfang Environmental Protection Bureau.

The upflow anaerobic reactor with the utility model three-phase separator is used to treat 870m ³ /d of citric acid production wastewater of Hebei Baoning Group Co., Ltd., and the stable operation results show that: when the concentration of COD, BOD ₅ and SS in the system enters the water When they are 11584mg/L, 8100mg/L and 2360mg/L respectively, the COD, BOD ₅ and SS of the effluent after treatment are 166mg/L, 34mg/L and 40mg/L respectively, and the removal rates reach 98.6%, 99.6% and 98.3% respectively . The water quality of the enterprise's main drainage outlet is lower than the first-level standard value in Table 2 of the "Integrated Wastewater Discharge Standard" (GB8978-96). The stable operating load of the anaerobic reactor is 5.32kgCOD/m ³ .d, the COD removal rate is 95.9%, and the biogas output is 3500m ³ /d. Anaerobic effluent contact oxidation treatment, COD removal rate was 54.9%. The operation results of increasing the load of a single reactor show that the operating load can reach 13.4kg COD/m ³ .d, and the COD removal rate is 92%. At present, it has passed the acceptance inspection organized by Baoding Environmental Protection Bureau.

Description of drawings

Accompanying drawing 1 is the structural representation of UASB reactor in the prior art

Accompanying drawing 2 is the structure schematic diagram of the utility model three-phase separator

Accompanying drawing 3 is to use the utility model wastewater treatment process flow chart

In the attached drawings: 1 water distributor water pipe, 2 reactor cylinder, 3 thermometer casing, 4 annular channel, 5 sedimentation area cylinder, 6, annular channel 7 conical guide tube, 8 wide mouth, 9 air chamber , 10 Exhaust pipe, 11 Gas hood, 12 Water outlet tank, 13 Water outlet pipe, 14 Supporting channel steel, 15 Reflecting plate, 16 Sampling pipe, 17 Manhole, 18 Mud discharge pipe, 19 Grille, 20 Regulating tank, 21 Flow rate Meter, 22 heat exchanger, 23 water distributor, 24 water seal tank, 25 buffer tank, 26 gas meter, 27 anaerobic sedimentation tank.

Detailed ways

Using the wastewater treatment process of the utility model as shown in Figure 3, the wastewater enters the regulating tank 20 after removing larger floating and suspended substances through the grid 19, and performs water volume regulation and water quality balance. After the adjustment, the waste water is preheated by the flow meter 21 and the heat exchanger 22, and then enters the anaerobic reactor cylinder 2 of the utility model through the water distributor 23. Through the hydraulic stirring of the incoming water and the gas flow stirring of the biogas, the waste water and the sludge Fully contacted, the anaerobic bacteria degrade the organic matter in the wastewater into CH ₄ and CO ₂ (biogas), and the biogas produced is measured by the water seal tank 24, the buffer tank 25 and the gas meter 26 in sequence before being used by the user; the anaerobic effluent is passed through the anaerobic After sedimentation in the sedimentation tank 27, it enters the next-level processing unit.

As shown in accompanying drawing 2, the utility model is made up of the conical guide tube 7 that is arranged on the anaerobic upper end and the air cover 11 that is arranged on the upper end of the conical guide tube 7, and the lower end of the cover wall of the air cover 11 and the conical guide tube An annular passage 6 is arranged between the upper wall of the flow cylinder 7 , and an annular passage 4 is provided between the lower end of the tapered draft guide cylinder 7 and the upper wall of the anaerobic reactor cylinder 2 . The conical guide tube 7 and the gas cover 11 are fixedly arranged on the upper end of the reactor cylinder 2 through the supporting channel steel 14 .

The mud-water mixture of the utility model passes through the annular channel 6 formed between the conical guide tube 7 and the gas cover 11, so that it enters the cylinder body 5 of the sedimentation area for mud-water separation, and the sludge in the waste water undergoes flocculation and settles under the action of gravity , and return to the reaction zone along the inclined wall of the conical guide tube 7. In order to slow down the water flow velocity and provide sufficient residence time for the sludge, the upper end of the reactor cylinder 2 of the utility model purposely expands the sedimentation zone cylinder outward, and the sedimentation zone cylinder 5 and the reactor cylinder 5 arranged at the upper end of the reactor cylinder 2 The cylinders 2 are connected by oblique reflection plates 15, that is, the cylinder wall of the anaerobic reactor cylinder 2 corresponding to the position of the lower end of the cone-shaped draft guide cylinder 7 is composed of oblique reflection plates 15, so that Effectively increase the volume of the sedimentation zone. And the bottom of the sedimentation area is made into a structure similar to that of an ordinary vertical flow sedimentation tank, with a slope of about 50° to facilitate the sludge to slide back to the reactor by gravity.

The utility model forms the sludge return seam, that is, the annular channel 4 through the reflection plate 15 in the sedimentation area and the conical guide tube 7 . According to the principle of fluid mechanics, the flow area of the ring channel 4 is much smaller than the flow area of the ring channel 6, and its resistance is relatively large. The waste water mainly flows out from the ring channel 6, and the sludge with a high sedimentation velocity can flow back to the reaction from the ring channel 4. The reactor cylinder 2; while the smaller flocs are discharged from the reactor cylinder 2 by hydraulic elutriation, which is conducive to the formation of granular sludge.

The design of the annular channel 4 of the utility model is very important. Combined with the annular channel 6, the mud-water separation and gas-water separation are completed in different parts, and the separation effect of gas, sludge and water is good. This avoids the problem that the mixed liquid ascending channel and the sludge return in the traditional three-phase separator share a channel (as shown in Figure 1) and the sludge return is greatly disturbed by the influent water flow.

As shown in Figure 2, due to the high rising water velocity of the mixed liquid in the reactor cylinder 2 and the rising velocity of the airflow generated by the biogas entrainment, it is difficult to separate the sludge from the waste water. The inside of the flow tube 7 completes the separation of biogas and mixed liquid. At the same time, the wide mouth 8 and the gas cover 11 on the upper part of the conical flow tube 7 form a large volume gas chamber 9 and a large gas-liquid separation interface, which can effectively reduce biogas. The release rate and the amount of water vapor entrainment exiting the reactor barrel 2.

As shown in accompanying drawing 2, the diameter of the reactor shell 2 of the utility model is 3-13 meters, and the diameter of the wide mouth 8 of the conical guide tube is 2-9 meters, forming the angle α of the inclined plate of the conical guide tube 7 is 45°-60°, the angle β of reflector 15 is 45°-60°, the diameter of cylindrical air cover 11 is 2.5-10 meters, the width of annular passage 6 is 0.15-0.5 meters, and the width of annular passage 4 It is 0.03-0.2 meters. The diameter of the exhaust pipe 10 is 0.08-0.4 meters.

Claims (6)

1. the triphase separator of a upflow type anaerobic reactor, it is characterized in that it is made of taper guide shell (7) that is arranged on anaerobism upper end and the gas hood (11) that is arranged on taper guide shell (7) upper end, be provided with circular channel (6) between the lower end of gas hood (11) cover wall and taper guide shell (7) the upper end barrel, taper guide shell (7) barrel lower end and anaerobic reactor cylindrical shell (2) are gone up between the barrel and are provided with circular channel (4).

2. the triphase separator of a kind of upflow type anaerobic reactor according to claim 1 is characterized in that being arranged on that the tilting reflector (15) of employing is connected between the settling region cylindrical shell (5) of reactor shell (2) upper end and the reactor shell (2).

3. the triphase separator of a kind of upflow type anaerobic reactor according to claim 1 and 2 is characterized in that being made of tilting reflector (15) with the barrel of taper guide shell (7) the corresponding anaerobic reactor cylindrical shell of barrel lower end position (2).

4. according to the triphase separator of claim 1,2 or 3 described a kind of upflow type anaerobic reactors, it is characterized in that the wide-mouth (8) of gas hood (11) and taper guide shell (7) constitutes air chamber (9), gas hood (11) top is provided with vapor pipe (10).

5. according to the triphase separator of claim 1,2 or 3 a kind of upflow type anaerobic reactors of stating, it is characterized in that the wide-mouth (8) of taper guide shell (7) is embedded in the gas hood (11).

6. according to the triphase separator of claim 1,2 or 3 described a kind of upflow type anaerobic reactors, it is characterized in that taper guide shell (7) and gas hood (11) are by supporting the upper end that channel-section steel (14) is fixedly installed on reactor shell (2).

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