CN201665578U - An anaerobic reactor with internal and external circulation without power - Google Patents

Abstract

An anaerobic reactor with internal and external circulation without power, comprising a reactor tank body (4), a water inlet pipe (6), a water outlet pipe (3), a three-phase separator (8), a riser pipe (10), an internal return pipe ( 5), external return pipe (9), gas-liquid separator (2), feed pump (7), biogas outlet pipe (1), etc. The unpowered internal and external circulation anaerobic reactor consists of a three-phase separator (8), a riser (10), a gas-liquid separator (2), and an internal return pipe (5) to form a gas-liquid internal circulation path; The phase separator (8), the riser (10), the gas-liquid separator (2), and the external return pipe (9) form an external circulation path of gas and liquid. The utility model is suitable for the treatment of organic waste water, especially suitable for the treatment of large-scale farms, beer, citric acid and other organic waste water.

Description

An anaerobic reactor with internal and external circulation without power

technical field

The utility model relates to a non-powered internal and external circulation anaerobic reactor for sewage treatment, which belongs to the technical field of environmental protection water treatment.

Background technique

The internal circulation anaerobic reactor (Internal Circulation, IC reactor for short) is the third generation of high-efficiency anaerobic bioreactor successfully developed by PAQUES in the Netherlands on the basis of the UASB reactor in the mid-1980s. See IC reactor research in academic journals. Since the establishment of the first IC pilot reactor by PAQUES in the Netherlands in 1985, the first production-scale IC reactor was put into operation in 1988. Compared with the second-generation high-efficiency anaerobic reactor represented by UASB, IC The reactor is regarded as one of the representative processes of the third-generation anaerobic reactor because of its high volume load, low energy consumption, stable operation, low investment, and land occupation. Further research and development, promotion and application of IC reactors have also become current One of the hotspots of anaerobic wastewater treatment. Any new thing has a process of continuous development and improvement. Traditional IC reactors also have some shortcomings in the process of treating wastewater. Therefore, people have made some improvements on the basis of IC reactors. At present, the relevant improvements The patents of the IC reactor mainly include the internal circulation anaerobic reactor disclosed by the announcement number CN2732729Y; the composite internal circulation anaerobic reactor disclosed by the announcement number CN100412008C; the new internal circulation anaerobic reactor disclosed by the announcement number CN2581437Y, etc. The traditional IC reactors have been improved accordingly.

Contents of the invention

The purpose of this utility model is, on the basis of the IC reactor, change the circulation structure of the treated water, increase the external circulation process, further improve the volume load of the traditional anaerobic reactor and the purification ability of sewage, and propose a new structure anaerobic reactor.

The technical scheme of the utility model is:

The utility model is researched and invented by applying the hydraulic principle of the air lift type and the thermodynamic principle of the external falling liquid evaporator. The utility model consists of a reactor tank body (4), a water inlet pipe (6), an outlet pipe (3), a three-phase separator (8), a riser pipe (10), an inner return pipe (5), an outer return pipe (9) ), gas-liquid separator (2), feed pump (7), biogas outlet pipe (1), etc.

A gas-liquid internal circulation path is composed of a three-phase separator (8), a riser (10), a gas-liquid separator (2), and an internal return pipe (5); the three-phase separator (8), the riser (10 ), the gas-liquid separator (2), and the external return pipe (9) form the gas-liquid external circulation path.

The organic wastewater enters the anaerobic tank from the anaerobic tank, and in the anaerobic tank, it contacts with anaerobic bacteria and suspended sludge, and ferments to produce biogas. During the formation of biogas bubbles, the expansion work is done on the liquid to produce gas lifting effect At the same time, the biogas and the mud-water mixture carried along rise up the riser. During the rise, through the secondary three-phase separator, the large-grained sludge sinks to the lower part of the tank along the hypotenuse of the three-phase separator, resulting in The biogas and the sludge with small particles enter the gas-liquid separator, and the biogas is discharged through the biogas discharge pipe into the biogas storage tank or directly used as fuel; the liquid entering the gas-liquid separator returns to the reaction tank from two paths, one It enters the bottom of the anaerobic tank through the internal return pipe; one enters the bottom of the anaerobic tank through the external return pipe. Because the anaerobic device maintains a high temperature state under the protection of the insulation layer and the reaction liquid, the external return pipe outside the device is in the atmospheric environment, and the temperature of the mixed liquid in the external return pipe is obviously lower than that of the material in the device, so the density of the gas-liquid mixture in the rising pipe The smaller the size, the higher the density of the mud-water mixture in the return pipe, which makes the material in the riser and the outer return pipe form a larger density difference and accelerate the lifting of the air bubbles. Under the action of expansion work and temperature difference, the biogas bubbles and the mud-water mixture carried along the riser rise to the top of the anaerobic vessel. The external reflux pipe returns to the bottom of the reactor to form a natural circulation in which the riser in the reactor descends outside.

The power source of the external circulation mass transfer anaerobic device cycle is the expansion work done when the biogas bubbles are formed, and the temperature difference between the riser inside the device and the return pipe outside the device. The material has obvious density difference and produces natural circulation. Due to the natural circulation, the anaerobic device has a high hydraulic rising speed, which accelerates the mass transfer between organic wastewater and anaerobic sludge. Using unpowered internal and external circulation technology, under the action of expansion work and temperature difference, there is a large circulation volume and high hydraulic surface load, the water flow rises at a speed of 10m/h-20m/h, plus high gas production. Due to the disturbance effect, the granular sludge completely reaches the state of expansion and fluidization, so the mass transfer rate is enhanced and the volumetric load of organic matter is greatly increased.

The beneficial effect of the utility model compared with the prior art is that, because the utility model adopts a structure different from that of the internal circulation anaerobic reactor, on the basis of the internal circulation, the external circulation mass transfer function is added, and the internal circulation of the reactor is improved. The rising speed of sewage treatment has accelerated the mass transfer between organic wastewater and anaerobic sludge, and improved the purification ability of sewage. Compared with the common IC reactor, the utility model can improve the COD removal rate by 10-20% under the condition of treating the same water quality and the same treatment capacity.

The utility model is suitable for the treatment of organic waste water, especially suitable for the treatment of large-scale farms, beer, citric acid and other organic waste water.

Description of drawings

The picture is a schematic diagram of the structure of an anaerobic device with internal and external circulation without power

Figure number in the picture: (1) biogas outlet pipe; (2) gas-liquid separator; (3) water outlet pipe; (4) reactor tank; (5) internal return pipe; (6) water inlet pipe; (7) Feed pump; (8) three-phase separator; (9) external return pipe; (10) riser.

Detailed ways

The utility model embodiment structure is as shown in the accompanying drawing. The present embodiment consists of reactor tank (4); biogas outlet pipe (1); gas-liquid separator (2); water outlet pipe (3); inner return pipe (5); water inlet pipe (6); feed pump ( 7); a three-phase separator (8); an external return pipe (9); and a riser (10). The reaction tank in this embodiment is made of steel plate material, the inside of the reaction ^tank is treated with anti-rust and anti-corrosion, and the outside of the reaction tank is laid with an insulation layer ^. /h, lift 20m. In this embodiment, the daily processing capacity is 150t, and the COD removal rate reaches more than 80%.

Claims (1)

1. power-free inner-outer circulation anaerobic reactor, it is characterized in that described inner-outer circulation anaerobic reactor goes out pipe (1) etc. by reactor tank body (4), water inlet pipe (6), rising pipe (3), triphase separator (8), riser tube (10), internal reflux pipe (5), external reflux pipe (9), gas-liquid separator (2), fresh feed pump (7), biogas and forms; Triphase separator (8), riser tube (10), gas-liquid separator (2), internal reflux pipe (5) are formed the internal recycle path of gas-liquid; Triphase separator (8), riser tube (10), gas-liquid separator (2), external reflux pipe (9) are formed the outer circulation path of gas-liquid.

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