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Residual biochemical sludge reduction treatment system and residual biochemical sludge reduction treatment method

A treatment system, biochemical sludge technology, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of high requirements for incineration technology equipment, pollution of harmful gases in the atmosphere, heavy metal pollution in soil, etc. problems, to achieve the effect of prolonging the average residence time, high sludge reduction rate, and easy promotion and application

Pending Publication Date: 2019-11-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies have a certain effect on the reduction of excess activated sludge, but they all have obvious shortcomings. For example, the dry landfill technology not only occupies a large amount of land, but also has the risk of polluting groundwater, and the composting technology will cause heavy metals in the soil during use. Pollution and biological pollution, incineration technology not only requires high equipment and high processing costs, but also produces harmful gases that pollute the atmosphere

Method used

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  • Residual biochemical sludge reduction treatment system and residual biochemical sludge reduction treatment method

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specific Embodiment approach

[0062] According to a specific embodiment of the present invention, the method for mixing, heating and boosting the remaining biochemical sludge and additives in the feed system includes:

[0063] Send the excess biochemical sludge and additives through the excess biochemical sludge inlet and additive inlet respectively, or send the excess biochemical sludge and additives into the raw material buffer tank 3 through the excess biochemical sludge inlet, and set it in the raw material buffer The heater in the tank 3 heats the reaction material to 80-300°C, preferably 100-250°C, and then boosts the pressure to 0.05-10MPa, preferably 0.1-5MPa, through the feed booster pump 6, and sends it into the reaction system for further Subtractive response.

[0064] According to another specific embodiment of the present invention, the method for mixing, heating and boosting the remaining biochemical sludge and additives in the feed system includes:

[0065] The remaining biochemical sludge ...

Embodiment 1

[0079] This example is used to illustrate the method for sludge reduction treatment using the excess biochemical sludge treatment system of the present invention.

[0080] Such as figure 1 As shown, the remaining biochemical sludge treatment system includes a feed system, a reaction system and a separation system.

[0081] The method for mixing, heating and boosting the sludge raw material (the temperature of the sludge raw material is 35° C. at normal temperature) and the alkaline additive (sodium hydroxide aqueous solution, with a mass percentage concentration of 65%) in the feed system includes: Sludge raw materials and additives are sent into the raw material buffer tank through the remaining biochemical sludge inlet, and heated to 180°C by the heater installed in the raw material buffer tank. The reaction material is drawn out from the raw material buffer tank and sent to the feed booster pump to increase the pressure to 1.5MPa, and then sent to the reaction system for s...

Embodiment 2

[0085] This example is used to illustrate the method for sludge reduction treatment using the excess biochemical sludge treatment system of the present invention.

[0086] According to the method of Example 1, the sludge reduction treatment is carried out on the sludge raw material. The structure of the reactor used and the reaction conditions are the same as in Example 1. The difference is that the reaction system also includes a steam flash tank. The reaction product used in the second port is decompressed and enters the steam flash tank for flash evaporation. The operating pressure of the flash tank is 0.1MPa, the temperature after flash evaporation is 120°C, and the vaporization rate is 10%. The steam generated is directly used as the fuel of the reaction system. The heat source is evenly distributed by the gas distributor through the heat source inlet, and then sent to the raw material buffer tank of the feeding system for contact, mixing and heat exchange with the reactio...

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Abstract

The invention relates to the field of solid waste reduction and resource application, and discloses a residual biochemical sludge reduction treatment system and a residual biochemical sludge reductiontreatment method. The treatment system comprises a feeding system, a reaction system and a separation system, wherein the reaction system comprises a reactor and a pressure reducer, an inner member is arranged in the reactor, and comprises a first separation plate and a second separation plate, the reactor comprises a first side wall part and a second side wall part, the first side wall part andthe second side wall part are opposite to each other, one end of the first separation plate is fixed on the first side wall part, the other end of the first separation plate extends towards the secondside wall part, and is spaced from the second side wall part, one end of the second separation plate is fixed on the second side wall part, the other end of the second separation plate extends towards the first side wall part, and is spaced from the first side wall part, and the first separation plate and the second separation plate are alternately arranged in the height direction of the reactor.According to the present invention, with the application of the treatment system to carry out hydrothermal treatment on residual active sludge, organic matters can be effectively removed from sludgeto obtain the residual sludge with the substantially reduced water content, such that the sludge reduction discharge is achieved.

Description

technical field [0001] The invention relates to solid waste reduction and resource utilization, and more specifically, to a residual biochemical sludge reduction treatment system and treatment method. Background technique [0002] In recent years, my country's environmental protection industry has developed rapidly, and the sewage treatment capacity and treatment rate have increased rapidly. As of the end of September 2016, a total of 3,976 sewage treatment plants have been built nationwide, with a daily sewage treatment capacity of 170 million cubic meters. It plays a big role. But at the same time, the sewage treatment process produces a large amount of excess activated sludge. Based on the amount of excess activated sludge produced by the current sewage treatment, 1.3 million cubic meters of excess activated sludge with a water content of 98% by weight will be produced every day, with an annual output of excess activated sludge. Sludge will reach 475 million cubic meters,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/18
CPCC02F11/00C02F11/18C02F2303/06
Inventor 秦娅袁清朱振兴毛俊义唐晓津桑军强
Owner CHINA PETROLEUM & CHEM CORP