Artificial inner gas stripping anaerobic reactor

A reactor and air stripping technology, applied in the field of sewage treatment reactors, can solve the problems of difficult classification, high energy consumption, expensive equipment, etc., and achieve the effects of suitable control, stable operation, and low energy consumption of fans

Inactive Publication Date: 2013-04-03
ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pump-type external circulation means that the sewage in a certain part of the reactor is pumped out with a pump, and then returned to an appropriate part of the reactor. Through the different arrangements of the pumping and returning water parts and the adjustment of the pumping volume, the internal circulation of the reactor can be realized. The stability of the internal circulation; however, one of the biggest disadvantages of this method is: the pumped part of the sewage, through the mechanical action of the pump, will break up the sludge and destroy the activity of the sludge, especially for particles The impact of sludge is even worse. If water without sludge (water in the upper part of the three-phase separator) is pumped, it is difficult to grade the water flow rate in the upper and lower parts of the three-phase separator, and it is difficult to achieve internal circulation.
Gas-type external circulation means that the biogas at the top of the reactor is pumped out by a fan and then pressed into the bottom of the reactor. By manually replenishing and adjusting the gas volume, the instability of the reactor's own gas production is compensated, and the internal circulation of the reactor is realized. However, this has brought many disadvantages: first, biogas is a flammable and explosive gas, which requires extremely high requirements on the fan for extracting biogas, and the equipment is expensive; second, the height of the internal circulation reactor is generally more than ten meters or more High, to overcome the pressure of water to press the gas back into the reactor, the energy consumption is very high

Method used

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  • Artificial inner gas stripping anaerobic reactor
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  • Artificial inner gas stripping anaerobic reactor

Examples

Experimental program
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Effect test

Embodiment 1

[0018] like figure 1 The artificial internal air lift anaerobic reactor shown includes: water inlet 1, return pipe 2, reactor shell 3, gas collection and separation cover 4, air lift pipe 5, gas-liquid separator 6, air lift fan 7, Biogas outlet 8, water outlet 9.

[0019] The working principle of the present embodiment 1 is briefly introduced as follows:

[0020] When the sewage enters the reactor shell 3 from the water inlet 1, the pollutants are removed through the action of microorganisms in the reactor, and biogas is generated at the same time. The generated biogas rises to the gas collection and separation hood 4 , and under the action of the gas collection and separation hood 4 , the sludge flows back to the reaction zone, the sewage flows to the water outlet 9 , and the biogas enters the stripping pipe 5 . The function of the gas collection and separation cover 4 here is the same as that of the three-phase separator in the UASB. The biogas entering the stripping pipe...

Embodiment 2

[0022] like figure 2 The auxiliary internal gas-lifting anaerobic reactor shown, the difference between the second embodiment and the first embodiment is that the secondary gas-lifting pipe 10, the secondary gas-collecting separation cover 11, the secondary return pipe 12, the secondary The air lift fan 13 and the baffle plate 14, through the addition of these components, form a vertical series reactor, increase the reaction area, and thus make the adaptability of the reactor wider.

Embodiment 3

[0024] like image 3 The auxiliary internal air-lift anaerobic reactor shown includes: water inlet 1, primary return pipe 2, primary reactor shell 3, primary gas-collecting and separating cover 4, primary air-lifting pipe 5, primary gas Liquid separator 6, primary gas lift fan 7, primary biogas outlet 8, primary water outlet 9, secondary water inlet 10, secondary return pipe 11, secondary reactor shell 12, secondary gas collection and separation cover 13. Secondary gas lift pipe 14, secondary gas-liquid separator 15, secondary gas lift fan 16, secondary biogas outlet 17, secondary water outlet 18, tertiary water inlet 19, tertiary return pipe 20, tertiary Reactor shell 21 , secondary gas collection and separation cover 22 , tertiary gas lift pipe 23 , tertiary gas-liquid separator 24 , tertiary gas lift fan 25 , tertiary biogas outlet 26 , and water outlet 27 . The primary water outlet 9 is connected to the secondary water inlet 10, and the secondary water outlet 18 is connec...

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Abstract

The invention discloses an artificial inner gas stripping anaerobic reactor which comprises a water inlet, a water return pipe, a reactor shell, a gas collecting separating cover, a gas stripping pipe, a gas-liquid separator, a gas stripping fan, a biogas outlet and a water outlet and is characterized in that the gas stripping fan is positioned in the gas-liquid separator. The gas stripping fan is positioned in the gas-liquid separator, so that internally-circulating water quantity can be artificially controlled while the reactor runs steadily, and gas stripping can be realized by using ordinary fans while energy consumption of the fans is lowered.

Description

technical field [0001] The invention relates to a sewage treatment reactor, in particular to a high-efficiency reactor for anaerobic treatment of sewage. Background technique [0002] Sewage anaerobic treatment reactor has experienced the development of CSTR, UASB, EGSB, internal circulation reactor and other stages, and the treatment efficiency of the reactor has been greatly improved. In terms of working principle, the internal circulation reactor has brought the advantages of the anaerobic reactor into full play. [0003] However, the internal circulation reactor also has its own weaknesses, which are mainly manifested in: the internal circulation reactor must rely on the gas stripping effect generated by its own biogas to achieve internal circulation, and due to the instability of sewage water quality and the unstable operation of the reactor Stability will make the biogas output of the reactor itself unstable, and the instability of the biogas output will make the inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCY02E50/30
Inventor 张建中
Owner ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND
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