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Exhaust gas treatment device

An exhaust gas treatment device and exhaust gas technology, which are applied in exhaust gas devices, combustion product treatment, climate sustainability, etc., can solve the problems of metal mesh breakage, breakage, mesh blockage of metal mesh, etc., and achieve the effect of damage suppression

Inactive Publication Date: 2016-04-20
MITSUBISHI POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, by causing large pieces of explosion ash to hit the metal net or the like, the mesh of the metal net is partially clogged or abraded, or the metal net is broken.
In addition, in Patent Document 2, although the impact force of the explosion ash is absorbed by inclining the collection member, the exhaust gas flowing in the exhaust gas passage is at a higher speed in the central portion than in the wall portion, so that the central portion of the collection member may be damaged. The wear and tear of the part becomes more serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] figure 1 is a schematic structural diagram showing a pulverized coal incineration boiler to which the exhaust gas treatment device according to Example 1 of the present invention is applied, figure 2 is a schematic side view showing the exhaust gas treatment device of Example 1, image 3 is a schematic plan view showing the exhaust gas treatment device of Example 1, Figure 4 It is a schematic diagram showing the pop-up ash collection part of Example 1.

[0046] The pulverized coal incineration boiler to which the exhaust gas treatment device of Example 1 is applied uses pulverized coal pulverized coal as a solid fuel, and burns the pulverized coal in a combustion furnace to recover heat generated by the combustion.

[0047] In this Example 1, as figure 1 As shown, the pulverized coal incineration boiler 10 is a traditional boiler with a furnace 11 and a combustion device 12 . The melting furnace 11 has a hollow shape of a square tube and is installed along the ver...

Embodiment 2

[0078] Figure 5 It is a front view of the explosion ash collection unit in the exhaust gas treatment device according to Example 2 of the present invention, Figure 6 It is a plan view of the pop-up ash collection part of Example 2, Figure 7 It is a side view of the pop ash collection part of Example 2.

[0079] In Embodiment 2, the basic structure of the exhaust gas treatment device is the same as that of Embodiment 1, only the structure of the explosion ash collection part is different. Such as Figure 5 ~ Figure 7 As shown, the explosion ash collection part 71 has a plurality of inclined parts inclined at a predetermined inclination angle with respect to the flow direction of the exhaust gas. The inclination angle of the inclined portion is small.

[0080] The explosion ash collection unit 71 has a plurality of (six in Example 2) inclined collection surfaces 72 (72a, 72b) that intersect with the exhaust gas flow direction and follow the vertical direction as the plura...

Embodiment 3

[0093] Figure 8 It is a front view of the explosion ash collection part in the exhaust gas processing apparatus which concerns on Example 3 of this invention. Figure 9 It is a side view of the pop ash collection part of Example 3.

[0094] In Embodiment 3, the basic structure of the exhaust gas treatment device is the same as that of Embodiments 1 and 2, only the structure of the explosion ash collection part is different. Such as Figure 8 and Figure 9 As shown, the explosion ash collection part 81 has a plurality of inclined parts inclined at a predetermined inclination angle with respect to the flow direction of the exhaust gas, and the inclination angle of the inclined part arranged in the central part of the exhaust gas pipe is set to be lower than that arranged in the outer peripheral part. The inclination angle of the inclined portion is small.

[0095] The explosion ash collection part 81 has a plurality of inclined collection surfaces 82 (82a, 82b) which inters...

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Abstract

The exhaust gas treatment device is provided with: an exhaust gas pipe (48) through which it is possible for combustion gases to flow; a heat recovery part furnished to the exhaust gas pipe (48) and capable of recovering heat from the exhaust gases; a harmful substance removal part furnished to the downstream side in the direction of exhaust gas flow from the heat recovery part in the exhaust gas pipe (48), and capable of removing harmful substances in the exhaust gases; and a popcorn ash trapping part (61) furnished between the heat recovery part and the harmful substance removal part in the exhaust gas pipe (48), and capable of trapping popcorn ash in the exhaust gases. The popcorn ash trapping part (61) is provided with a plurality of inclined trapping surfaces (66a, 66g, 66c, 66d, 66e, 66f) inclined at predetermined angles with respect to the direction of exhaust gas flow, the incline angle (theta1) of the inclined trapping surface (66a) disposed towards the center in the width direction of the exhaust gas pipe (48) being smaller than the incline angle (theta6) of the inclined trapping surface (66f) disposed towards the end.

Description

technical field [0001] The present invention relates to an exhaust gas treatment device used in a boiler for generating steam for power generation or factory use. Background technique [0002] For example, a conventional pulverized coal combustion boiler has a hollow furnace installed in the vertical direction, and a plurality of combustion furnaces are arranged circumferentially on the furnace wall and arranged in multiple layers in the vertical direction. A mixed gas of pulverized coal (fuel) and primary air is supplied to the combustion furnace, and high-temperature secondary air is supplied, and the mixed gas and secondary air are blown into the furnace to form a flame. The furnace burns. Furthermore, the upper part of the melting furnace is connected with a flue, and the flue is provided with a superheater, a reheater, an economizer, etc. for recovering the heat of the exhaust gas, and exchanges between the exhaust gas and water generated by the combustion in the furna...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23J3/04F23J13/08
CPCF23J15/022F23J2217/20Y02P80/15
Inventor 冈元章泰户高心平小田学坂田展康河越博美
Owner MITSUBISHI POWER LTD
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