Desulfurization and denitration powder preheating gas generator and corresponding powder boiler

The technology of denitration powder and generator is applied in the field of denitration powder preheating gas generator and corresponding powder boiler, and desulfurization field, which can solve the problems of small operation elastic space, easy to run material, difficult to maintain, etc., so as to improve the operation flexibility. The effect of stability, large operating flexibility, and improved combustion reliability

Pending Publication Date: 2020-12-01
兖矿中科清洁能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of pulverized coal preheating burner and corresponding vertical boilers have been used industrially in China, but they all have problems such as small operating flexibility space, difficult establishment of material balance during operation, and easy material loss after the establishment of material balance. , is currently under continuous improvement
[0006] In addition, desulfurizat...

Method used

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  • Desulfurization and denitration powder preheating gas generator and corresponding powder boiler
  • Desulfurization and denitration powder preheating gas generator and corresponding powder boiler
  • Desulfurization and denitration powder preheating gas generator and corresponding powder boiler

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0042] Implementation mode one: if figure 1 As shown, the desulfurization and denitrification powder preheating gas generator of the present invention includes a preheating combustion chamber 1, a gas-solid separator 2 and a feeder 3. The pipes 5 are connected, and the gas-solid separator 2 is a cyclone separator structure. The gas-solid separator 2 is provided with an inlet, a lower solid outlet and a top gas outlet. The lower side wall of the preheating combustion chamber 1 is provided with fuel powder Feed pipe 6, one side of the bottom of the preheating combustion chamber 1 communicates with the lower opening of the feeder 3, the inlet of the gas-solid separator 2 communicates with the top of the preheating combustion chamber 1, and the solids in the lower part of the gas-solid separator 2 The outlet communicates with the upper opening of the feeder 3, and the gas outlet at the top of the gas-solid separator 2 is connected with a gas outlet pipe 7. The feeder 3 is composed...

Embodiment approach 2

[0044] Embodiment 2: The hopper 10 includes a sand hopper 101 and a desulfurizer hopper 102. The lower port of the sand hopper 101 is provided with a feed valve 9, and communicates with a sand pipe 11 through the feed valve 9. The desulfurizer The lower mouth of the bucket 102 is provided with a screw feeder 12, and through the screw feeder 12, it communicates with a desulfurizer pipe 13, and the sand feeding pipe 11 and the desulfurizer pipe 13 are respectively used as the feed pipe 8 and passed into the preheating combustion chamber 1, Such as figure 2 shown; or the sand pipe 11 and the desulfurizer pipe 13 pass into the feed pipe 8 jointly, and pass into the preheating combustion chamber 1 through the feed pipe 8, as image 3 As shown, other structures are as described in Embodiment 1, and are omitted.

Embodiment approach 3

[0045] Implementation mode three: if Figure 4 As shown, the middle and lower part of the preheating combustion chamber 1 is provided with a fluidized bed 14 structure, and the upper part of the preheating combustion chamber 1 is also provided with a top sealing plate 111, an enlarged shell 112 and an inverted cone tubular transition section 113. The enlarged housing 112 is cylindrical, and its top side wall is provided with an air outlet groove 114. The outer edge of the top sealing plate 111 is welded on the upper edge of the expanded housing 112 and the upper edge of the air outlet groove 114 side wall. The plate 111 and the air outlet groove 114 form an air outlet, and communicate with the inlet of the gas-solid separator 2 through the air outlet, and the lower edge of the enlarged shell 112 is welded on the outer edge of the large end of the inverted cone-shaped transition section 113. The outer edge of the small end of the inverted cone-shaped transition section 113 is w...

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Abstract

The invention relates to a desulfurization and denitration powder preheating gas generator and a corresponding powder boiler. An existing pulverized coal preheating burner and a corresponding boiler are small in operation elastic space. Therefore, the desulfurization and denitration powder preheating gas generator comprises a preheating combustion chamber, a gas-solid separator and a return feeder; the preheating combustion chamber is provided with a feeding pipe; and a feeding valve or a spiral feeding machine are arranged at the upper end of the feeding pipe, and the feeding pipe communicates with the bottom of a feeding hopper through the feeding valve or the spiral feeding machine. A gas-solid pre-separation chamber and/or an auxiliary gas-solid separator can also be additionally arranged, the gas-solid pre-separation chamber and/or the auxiliary gas-solid separator respectively comprise an expansion shell, the cross sectional area of an inner cavity of each expansion shell is larger than or equal to 1.3 times that of an inner cavity of a preheating combustion chamber fluidized bed or a gas outlet pipe, and the height of each expansion shell is larger than or equal to 0.5 m. The desulfurization and denitration powder preheating gas generator and the corresponding powder boiler are strong in coal adaptability, low in in-boiler NOX emission, high in in-boiler desulfurizationefficiency, large in operation elastic space, easy in operation balance, easy in maintenance after balance, and suitable for various existing industrial and power station boilers.

Description

technical field [0001] The invention relates to a desulfurization and denitrification powder material preheating gas generator and a corresponding powder material boiler (including a powder material horizontal combustion boiler and a powder material vertical combustion boiler). Background technique [0002] 2018.03.23 authorized announcement, the Chinese invention patent with the announcement number CN 104791775 B discloses a vertical pulverized coal boiler with a bottom burner, 2015.08.12 authorized announcement, the announcement number is CN 204554755 U Chinese utility model publication waste heat boiler used in conjunction with it. [0003] The pulverized coal preheating burner disclosed in CN 104791775 B includes a preheating combustion chamber, a gas-solid separator and a feeder connected in sequence, and the three form a circulating fluidized bed gas generator. The vertical pulverized coal boiler has the advantages of sufficient combustion, small tail gas treatment bu...

Claims

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Application Information

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IPC IPC(8): F23C10/10F23C10/18F23C10/22F23C10/26F23C10/28
CPCF23C10/10F23C10/18F23C10/22F23C10/26F23C10/28
Inventor 潘清波高超冯伟张延亮李成章
Owner 兖矿中科清洁能源科技有限公司
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