A kind of exhaust gas mixer based on self-healing flame arrester

A fire retardant mesh and mixer technology, used in gas and gas/vapor mixing, fire rescue, chemical instruments and methods, etc., can solve the problems of film evaporation loss, stainless steel loss of antioxidant capacity, etc. High temperature oxidation protection ability, the effect of reducing the floor space

Active Publication Date: 2022-05-06
恩宜瑞(江苏)环境发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But when the temperature is higher than 900°C, the Cr on the surface 2 0 3 The film evaporates and loses, the substrate is exposed to an oxidizing atmosphere, and the stainless steel loses its oxidation resistance

Method used

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  • A kind of exhaust gas mixer based on self-healing flame arrester
  • A kind of exhaust gas mixer based on self-healing flame arrester
  • A kind of exhaust gas mixer based on self-healing flame arrester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment one mainly sets forth the concrete structure of the present invention, and specific content is as follows:

[0057] Such as figure 1 As shown, an exhaust gas mixer based on a self-healing fire arresting net, the exhaust gas inlet and outlet direction is the axis direction, and the exhaust gas mixer is composed of volume expansion chambers whose cross-sections are perpendicular to the same axis and arranged concentrically in sequence 1, fire arresting Chamber 2 and air mixing chamber 3; the joints of the capacity expansion chamber 1, fire retardant chamber 2 and air mixing chamber 3 are all connected by butt flanges 4.

[0058] Such as figure 2 , image 3 As shown, the expansion chamber 1 starts from the waste gas inlet 11 provided at the intake end, and its inner diameter gradually expands along the axial direction until it is consistent with the inner diameter of the adjacent fire retardant chamber 2 .

[0059] Such as Figure 4 As shown, the inside of ...

Embodiment 2

[0071] The second embodiment is mainly to illustrate the preparation method of the self-healing fire-blocking net 21 used in the present invention.

[0072] In this embodiment, the base material of the self-healing fire-blocking net is 304N stainless steel, and its chemical composition is shown in Table 1.

[0073] Table 1 Composition of 304N stainless steel

[0074] C mn Si Cr Ni P S N ≤0.08 ≤2.00 ≤0.75 18.0～20.0 8.0～10.5 ≤0.045 ≤0.03 0.10～0.16

[0075] In this embodiment, the Al material used is industrial pure Al welding wire, and the reagents used are all commercial experimental pure reagents. Concrete preparation method is as follows:

[0076] S1. Preparation of spherical MoS 2

[0077] First, put ammonium molybdate and sodium thiosulfate with a molar ratio of 1:2 into two beakers respectively, and ultrasonically treat them with deionized water for 10 minutes; then mix the treated ammonium molybdate and sodium thiosulfate to adjust th...

experiment example

[0098] This experimental example is described on the basis of the preparation method of the self-healing fire-blocking net 21 in Example 2, and aims to clarify the anti-oxidation ability of the self-healing fire-blocking net 21 .

[0099] In this experimental example, group A is the blank control group - the preparation material of the fire resistance net is simple 304N stainless steel; group B is the experimental group - the preparation material of the fire resistance net is Al / Ni-MoS 2 / 45ct / stainless steel mesh. See Table 2 for the change of mass with heating time of groups A and B at 1100°C.

[0100] Table 2 The mass change of Group A and Group B during thermal oxidation

[0101]

[0102] It can be seen from the data in Table 2 that the uncoated group A stainless steel is severely oxidized in a short period of time, while the coated Al / Ni-MoS 2 / 45ct coated Group B stainless steel is substantially free from oxidation. Because it forms a dense aluminum oxide protecti...

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Abstract

The invention relates to the technical field of exhaust gas treatment, in particular to an exhaust gas mixer based on a self-healing fire arresting net. The exhaust gas mixer is composed of containers whose cross sections are perpendicular to the same axis and arranged concentrically in sequence, taking the direction of exhaust gas in and out as the axis direction. It is composed of expansion chamber, fire-resistance chamber and air-mixing chamber; the inside of the fire-resistance chamber is filled with self-healing fire-resistance mesh, and the fire-resistance chamber is provided with a partition near the end of the air-mixing chamber; the center of the outlet end of the air-mixing chamber is provided with a vertical The end baffle in the axial direction is vertically connected with a baffle ring near the side edge of the air mixing chamber; there are multiple swirl plates between the side wall of the air outlet end of the mixing chamber and the end baffle; the air mixing chamber A number of air distribution pipes are arranged inside, the air inlet ends of the air distribution pipes are all inserted into the partition of the fire retardant chamber, and the air outlet ends of the air distribution pipes are shrunk in the baffle ring; The exhaust gas is diluted and collected, and it has a good high-temperature oxidation protection ability, so it has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of exhaust gas treatment, in particular to an exhaust gas mixer based on a self-healing fire arresting net. Background technique [0002] Regenerative combustion (RTO), regenerative catalytic combustion (RCO), and catalytic combustion (CO) technologies are widely used in the treatment of organic waste gas due to their advantages of high efficiency and energy saving. Usually, for the treatment of high-concentration flammable and explosive organic waste gas, in order to ensure the safe, reliable and stable operation of RTO, RCO and CO treatment processes, the high-concentration organic waste gas is diluted in the waste gas mixer to below the lower explosion limit of the components. necessary. Therefore, the design and development of exhaust gas mixer has always been a research hotspot in the field of exhaust gas treatment technology. [0003] The problems of existing exhaust gas mixers are mainly reflected i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F23/10A62C4/00
CPCA62C4/00B01F23/10
Inventor 陆兴峰李莹雪徐敬生黄前霖吕路
Owner 恩宜瑞(江苏)环境发展有限公司
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