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Treatment method for tail gas generated by sewage and sludge drying and treatment device thereof

A sewage sludge and treatment method technology, which is applied in the direction of chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems such as bad smell of tail gas, and achieve the effect of convenient precipitation and recycling

Inactive Publication Date: 2014-05-07
SUZHOU NIBAO ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At that time, the height of the chimney was 25m. According to the national standard, when the odor concentration reached ≤6000, our detection value at that time was 2300, which was in line with the standard. The project should be accepted, but the local environmental protection bureau did not approve it.

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  • Treatment method for tail gas generated by sewage and sludge drying and treatment device thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see figure 1 , a sewage sludge drying tail gas treatment device, the construction process includes the following steps:

[0036] (1) The construction of the washing part: use shale as a single-tower or double-tower water film dust collector, and then set up a water diversion pipe as the water inlet pipe of the water film dust collector, and introduce river water or tap water to supply the water film dust collector; set up an anti-corrosion The pipe is used as the outlet pipe of the washing water, and the washing water is guided into a sedimentation tank for sedimentation treatment; a flue is set as the inlet pipe of the water film dust collector, and a flue is set as the outlet pipe of the tail gas, and the flue passes through the cooling pool And access to the middle pool;

[0037] (2) The formation of the alkaline washing part: build a concrete sleeve pool, a large pool with a small pool, the large pool is used as a cooling pool, and the small pool is used as an inte...

Embodiment 2

[0042] Such as figure 1 As shown, a treatment method and device for sewage sludge drying tail gas, including: a water film dust collector, a cooling pool, an intermediate pool, a leaching tower, and a plasma tower; wherein, the water film dust removal The device is provided with an air inlet pipe and an air outlet pipe, a water inlet pipe and an outlet pipe; a part of the outlet pipe is arranged in the cooling pool, and passes through the cooling pool to reach the intermediate pool; the outlet pipe is connected to a sedimentation tank; the middle The pool is arranged in the middle of the cooling pool, and a leaching tower is arranged above the middle pool, and the airtight connection between the middle pool and the leaching tower is arranged, and a sludge suction device is arranged below the middle pool; the rinsing tower A eluent inlet pipe and an exhaust pipe are provided; the exhaust pipe is connected with the inlet pipe of the plasma tower.

[0043] Wherein, a lower pool ...

Embodiment 3

[0045] The method for treating sewage sludge drying tail gas using the device of the above embodiment includes:

[0046] Water washing, dedusting and cooling step: transfer the dried sewage sludge tail gas to a water film dust collector for water washing, and use the water film dust removal method to remove the smoke and dust and water-soluble components in the tail gas, and reduce the temperature of the tail gas at the same time;

[0047] The tail gas after water washing and dust removal passes through a pipe set in the cooling pool to further reduce the temperature of the tail gas; then the cooled tail gas is transported to an intermediate pool set in the middle of the cooling pool for atomization, and the atomized tail gas rises Enter the leaching tower set on the intermediate pool for alkali washing;

[0048] The alkali washing step includes: transporting the tail gas after water washing and dedusting to the washing tower to react with the alkaline washing agent, the alkal...

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Abstract

The invention belongs to the field of purification treatment on waste gas and in particular relates to a treatment method and device for tail gas generated by sewage / sludge drying. The treatment device comprises a water film dust remover, a cooling tank, a middle tank, a leaching tower and a plasma tower, wherein the water film dust remover is provided with a gas inlet pipeline, a gas outlet pipeline, a water inlet pipeline and a water outlet pipeline; the gas outlet pipeline penetrates through the cooling tank to reach the middle tank; the water outlet pipeline is connected with a settling tank; the middle tank is arranged in the middle of the cooling tank; the leaching tower is arranged above the middle tank; the middle tank is closely connected with the leaching tower; a sludge suction device is arranged below the middle tank; the leaching tower is provided with a leaching liquid inlet pipeline and a gas discharging pipeline; the gas discharging pipeline is connected with the gas inlet pipeline of the plasma tower. The treatment device disclosed by the invention can ensure that the tail gas generated in a sludge drying process of an urban sewage treatment factory can be completely and thoroughly treated, and the standard emission of tail gas can be realized.

Description

technical field [0001] The invention belongs to the field of waste gas purification and treatment, and in particular relates to a treatment method and a treatment device for tail gas produced after sewage / sludge drying. Background technique [0002] In recent years, under the influence of national energy conservation and emission reduction and active fiscal policies, urban sewage treatment has developed rapidly, and urban water environment governance has achieved remarkable results. However, it must be noted that a large amount of sludge generated in the process of urban sewage treatment has not been generally effectively treated and disposed of. These sludges are very easy to cause secondary pollution to groundwater, soil, etc., become a threat to environmental safety and public health, and affect the positive effect of the implementation of the national energy conservation and emission reduction strategy. Therefore, as an important part of my country's urban emission redu...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/40B01D47/00
Inventor 李兴卢归
Owner SUZHOU NIBAO ENVIRONMENT TECH