Fixed grate boiler allowing square bundle of stalks to be combusted

A fixed grate and boiler technology, applied in the direction of combustion method, combustion air/fuel supply, combustion equipment, etc., can solve the problems of inability to ensure sufficient combustion of straw bales, high pollution emissions, and low boiler efficiency, so as to avoid incomplete combustion The effect of stability, low pollution emission and high boiler efficiency

Active Publication Date: 2016-08-24
哈尔滨哈东新春锅炉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a fixed grate boiler for burning square bundles of straw in order to solve the problems that existing straw bundle burning boilers cannot ensure sufficient combustion of straw bundles, are prone to slagging, high pollution discharge, and low boiler efficiency.

Method used

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  • Fixed grate boiler allowing square bundle of stalks to be combusted
  • Fixed grate boiler allowing square bundle of stalks to be combusted

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Experimental program
Comparison scheme
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specific Embodiment approach 1

[0017] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment, this embodiment includes a feeding mechanism 1, a pre-combustion chamber 2, a first-stage primary air chamber 3, a second-stage primary air chamber 4, a burnout chamber 5, a water-cooled wall 6, a water-cooled jacket 7, and a turning furnace Row 9, fixed fire grate 10, stepped combustion chamber 11, air inlet adjustment baffle 14, settling chamber 15, steam drum 16, smoke pipe 17, middle adjustment baffle 19, reinforcement of the horizontal uniform distribution of the boiler front wall along the outlet The secondary air nozzle 8, the supplementary secondary air nozzle 12 arranged in symmetrical steps on both sides of the wall, the pre-chamber 2 is surrounded by a square water cooling jacket 7, the front of the pre-chamber 2 is connected to the feed port 13, the outlet of the pre-chamber 2 is connected to the stepped combustion The chamber 11 is connected, and the feeding mechanis...

specific Embodiment approach 2

[0022] Specific implementation mode two: combination figure 1 Describe this embodiment, the inner diameter of the water-cooling jacket 7 in this embodiment is the same as the cross-sectional size of the square bundle of straw, which is 440×350 mm. Avoid the spread of air in this area and prevent the flame from extending to this area; at the same time, the high water cooling ensures that the straw in this area does not catch fire. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination figure 1 and figure 2 Describe this embodiment, the combustion zone of the stepped combustion chamber 11 of this embodiment is laid with a guard combustion belt, and the guard burner belt is to adjust the water cooling degree of the furnace, and the pouring refractory material laid on the furnace radiation heating surface, and the laying of the guard burner belt can control the water cooling of the furnace. The degree is less than 0.3. Other components and connections are the same as those in the first embodiment.

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Abstract

The invention relates to a fixed grate boiler allowing a square bundle of stalks to be combusted, and in order to solve the problems that conventional boiler allowing a bundle of stalks to be combusted cannot guarantee that the stalks are sufficiently combusted, slag bonding is easy to occur, discharged pollution is high, and the efficiency of the boiler is low. Square water-cooled jackets are arranged all around a pre-combustion chamber, and a part in front of the pre-combustion chamber communicates with a feed opening; an outlet of the pre-combustion chamber communicates with a step combustion chamber which is divided into two-stage combustion chambers, wherein fixed grates are arranged at the lower part of a first-stage combustion chamber; turnover grates are arranged at the lower part of a second-stage combustion chamber; a first-stage primary air chamber is arranged under the fixed grates, a second-stage primary air chamber is arranged under the turnover grates; the total amount of primary air is adjusted through an air inlet regulating baffle, and the first-stage primary air amount and the second-stage primary air amount are distributed through a middle adjusting baffle; secondary air filling nozzles are arranged on two side walls of the step combustion chamber; secondary air reinforcing nozzles are arranged on the front wall of the step combustion chamber, and an inlet of an after-combustion chamber communicates with an outlet of the step combustion chamber. The fixed grate boiler disclosed by the invention is used for heating by peasant households away from heating sources in winter and is used as heat supply heating sources of agricultural greenhouses.

Description

technical field [0001] The invention relates to boiler equipment, in particular to a fixed grate boiler for burning square bales of straw. Background technique [0002] Straw is one of the most important biomass energy sources. The straw is directly scattered and burned, due to the low energy per unit volume and low density (20-40kg / m 3 ), transportation is inconvenient, laborious and time-consuming, etc., which limit the application of scattered combustion; although straw briquettes have high energy per unit volume, after compression molding by a molding machine, the density can reach 800-1100kg / m 3 , but it consumes a lot of power resources (90-120kw h / t), and the production efficiency is not high, and the molding machine cost and maintenance cost are high, which restricts the popularization and application of straw briquette fuel combustion at this stage. Straw bundling and burning technology has a moderate bundling density of biomass (density of 100-500kg / m 3 ), low e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B40/00F23L1/00F23L9/00F23K3/14
CPCF23B40/00F23K3/14F23L1/00F23L9/00
Inventor 栾积毅刑蕾刘向东姚嘉卢伟陈松林翁志刚李鸣唱姜配军宋义国
Owner 哈尔滨哈东新春锅炉有限公司
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