Coke oven denitration pipe and preparation method thereof

A technology of denitrification and coke oven, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, etc. It can solve problems such as inability to adapt to intermittent air blowing, inability to produce ceramic tubes, and poor thermal shock stability of ceramic tubes. , to achieve the effects of good thermal shock stability, long stable running time and low production cost

Inactive Publication Date: 2021-05-04
PUYANG PUNAI FUNCTIONAL MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ceramic tubes are highly resistant to corrosion, but it is impossible to make ultra-long ceramic tubes
Moreover, ordinary ceramic tubes have poor thermal shock stability and cannot meet the requirements of intermittent air blowing.

Method used

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  • Coke oven denitration pipe and preparation method thereof
  • Coke oven denitration pipe and preparation method thereof
  • Coke oven denitration pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1. A coke oven denitrification pipe, which includes a denitrification pipe head 1, several middle sections of denitrification pipes 2, a denitrification tailpipe 3, metal joints 4, and nozzles 5. The denitrification pipe head 1, several middle sections The middle section 2 of the denitration pipe and a denitration tailpipe 3 are sequentially connected by means of screw connection; at least one row of discontinuously distributed nozzles 5 is distributed on the whole denitration pipe.

Embodiment 2

[0051] Embodiment 2. One end of the denitration pipe head 1 is closed, and the other end is provided with threads; the middle section 2 of the denitration pipe is provided with a female thread 9 and a male thread 10 at both ends of each section, and the middle section 2 of the denitration pipe is provided with There is an internal gas channel 8, and the middle section 2 of the denitrification pipe is provided with a spray hole 7 which can be inlaid with a nozzle; the denitrification tailpipe 3 is provided with a thread at one end, and the other end is connected to an external metal joint 4 pipe fittings, and the middle part of the denitrification tailpipe 3 is provided with an internal The gas passage 8; the denitrification tailpipe 3 is provided with an injection hole 6.

Embodiment 3

[0052]Embodiment 3, the female thread 9 is directly formed by isostatic pressing, and the male thread 10 is processed by a lathe; the diameter of the head of the male thread 10 is smaller than the diameter of the tail, and the diameter of the head of the female thread 9 is greater than the diameter of the tail; the tail of the male thread 10 is set There is a knife relief groove, and the length of the knife relief groove is ≥5mm, which is convenient for assembling the denitration pipe, and sealing the seam with ceramic fiber rope or ceramic fiber mat or high-temperature sealant.

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PUM

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Abstract

The invention discloses a coke oven denitration pipe and a preparation method thereof and relates to a coke oven combustion waste gas purification technology. Nitride is combined with a silicon carbide material, the material has good thermal shock resistance and erosion resistance, and the production of the ultra-long ceramic denitration pipe is realized in a threaded connection manner, so that the long-term stable operation of a coke oven denitration system is ensured; the coke oven denitration pipe comprises a denitration pipe head, a plurality of denitration pipe middle sections in the middle, a denitration tail pipe, a metal joint and nozzles, wherein the denitration pipe head, the plurality of denitration pipe middle sections in the middle and the denitration tail pipe are sequentially connected in a threaded connection manner; and at least one row of nozzles which are distributed at intervals are distributed on the whole denitration pipe.

Description

technical field [0001] The invention relates to a coke oven combustion waste gas purification technology, in particular to a coke oven denitrification tube and a preparation method thereof. Background technique [0002] Coke ovens will produce a large amount of combustion exhaust gas during the production process, which contains a large amount of nitrogen oxides (NO x ). The direct discharge of coke oven combustion exhaust gas has caused serious pollution to the environment. my country stipulates that from January 1, 2015, existing coking enterprises must implement the GB16171-2012 emission standard. It is equivalent to the combustion waste gas produced by the current coking enterprises must be denitrified before it can be discharged. [0003] In the prior art, the denitrification of combustion exhaust gas is carried out at the main flue. Using this denitrification process, it is necessary to add a denitrification catalyst, and in order to overcome the resistance of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/56
CPCB01D53/8631
Inventor 孟红涛方文吉马龙斌樊海波李永力张金龙王允童则明王永辉张红锋
Owner PUYANG PUNAI FUNCTIONAL MATERIALS CO LTD
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