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Synergistic heat exchange method and temp increasing hood for hot water boiler

A technology of hot water boiler and thermal method, applied in the field of heating hood, can solve the problems of clean combustion and embers of combustible gas without reliable conditions, one-time combustion can not achieve completely clean combustion, increased cost and production difficulty, etc., to achieve reduction Effects of cost and production difficulty, environmental protection, and prolongation of utilization time

Inactive Publication Date: 2007-09-19
杨维丰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The flame of fuel combustion only undergoes a process of exothermic utilization, so that the goal of completely clean combustion cannot be achieved in one combustion, and the smoke at the end of the flame smoke flow is discharged into the atmosphere, wasting energy and polluting the environment
[0006] 2. The cylindrical combustion chamber structure leads to the axial flow of the flame and smoke flow, and the heating surface of the water jacket can only accept the radiant heat of the outer ring of the rapidly flowing flame and smoke flow, while the strong high-temperature direct heat in the middle part It flows to the front low temperature area, so the part of the heat that is too late for heat exchange is discharged from the chimney. In order to reduce heat loss, the only way to increase the heating area of ​​the water jacket and heat exchanger or the auxiliary waste heat utilization device is to increase the volume of the boiler and increase the cost. and production difficulty
[0007] For example, the coal-fired furnace in the specification of Chinese Patent No. 95102081.1 is a down-combustion method in which the volatile matter of gasification and carbonization under anoxic state is reversely burned through the carbon fire zone reaction. Practice has shown that although this method achieves smokeless combustion, the combustion The water jacket and heat exchanger of the coal furnace can only accept the axial radiant heat of the primary flame, and the down-combustion method makes the heat generated by the carbon fire zone too concentrated, which will cause high-temperature coking and deteriorate the working conditions
In order to make the boiler output more power, the multi-chamber (chamber) chamber combustion furnace technology of the Chinese patent . The waste of heat energy due to the high temperature of the smoke, and the complex structure of the furnace body increase the cost and difficulty of production
Another example is the high-efficiency smokeless combustion chamber device patented by China 02262912.2, which is actually a flame combustion utilization process, and there is no reliable condition to make the combustible gas completely clean and burn to ashes

Method used

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  • Synergistic heat exchange method and temp increasing hood for hot water boiler
  • Synergistic heat exchange method and temp increasing hood for hot water boiler
  • Synergistic heat exchange method and temp increasing hood for hot water boiler

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0038] Embodiment 1, shown in Fig. 1 to Fig. 4, cover body (4), cover body (7), cover body (71), guide tube (5) are the combined parts of heating cover. What Fig. 5 shows is to form the warming cover (41) by the chassis (51) of straight-sided cover body (4) and stepped guide tube (5), and its fire interlayer (52) and fire port (63) Connected with the cover bottom, the central guide eye (6) and the radial guide eye (61) are small hollow holes for guiding the flow, and the fire interlayer then forms a turn-back annular fire flow and laterally radiates heat from the large fire flow of the spout (63). As shown in Figure 6, the cover body (4) is fastened with the guide cylinder (5), and the single-stage surface coincides with the rotation fit to form a double-layer heat-increasing cover (42) of the burner port, and the rotating cover body (4) controls the burner port ( 62) fire flow and make the fire vent (63) large fire flow lateral heat release. Shown in Fig. 7, be the cover bod...

Embodiment approach 2

[0040] Embodiment 2, as shown in Figure 11, is provided with heat exchange fin (11) on the inner ring wall of the combustion chamber (8) that is surrounded by water jacket, and combustion chamber (8) is formed by annular hot air chamber (12) and heat exchange The fins (11) and the inner ring wall of the water jacket are joined and separated to form double-layer high-temperature zones (81) and (82). The space between the heat exchange fins is provided with an air inlet channel (14), and the rest of the space is covered by a refractory furnace lining ( 38) Packing to facilitate heat storage and avoid burning of the water jacket wall. The steam chamber (20) and the warm air chamber (19) are connected in parallel or snap fit, and the steam port (201) communicates with the bottom of the high temperature zone and the warm air chamber respectively.

[0041] The mixed airflow entering the high temperature zone (81) through the bottom contacts with the fuel to form a flame (3), and the...

Embodiment approach 3

[0043] Embodiment 3, Fig. 12 is a schematic diagram of a coal-fired hot water boiler with a heating hood that gathers the flue gas flow outside the high-temperature zone designed by the present invention. As shown in Figure 12, the hot water boiler shown in Figure 11 is provided with an outer water jacket (401) connected to the inner water jacket (1). The ring cavity (2) is connected, the upper part of the outer ring cavity is connected with the fire inlet (24) of the high temperature zone (82), the high temperature zone (83) is connected with the annular flue outlet (18), and the upper part of the fire gathering port (13) is respectively set Warming cover (44) and (45), the bottom of high temperature zone (81) is provided with fire grate (17), and the outside is provided with carbonization chamber (16).

[0044] When the coal burns normally, the fire column at the end of the flame (3) burns under the control of the heating cover (45), and the guide eye (61) is in a closed sta...

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Abstract

The present invention provides efficiency raising heat exchanging method and temperature raising hood for water heating boiler and the water heating boiler. Inside the furnace body, there are several transverse heat utilizing high temperature zones and low temperature zones to collect flame end and fume flow end of the hearth, the outer combustor cavity or the outer combustor cavity for secondary or multiple gas supply. Under the control of the temprature raising hood, re-mixing combustion and multiple transverse heat utilization are reached. The present invention makes it possible to burn the combustible gas fully and utilize heat effectively and has the features of high heat exchange efficiency, good environment protecting performance, no black smoke exhausted, no dust exhausted, etc.

Description

[0001] Field: [0002] The invention belongs to the technical field of boiler combustion, and in particular relates to an efficiency-enhancing heat exchange method and a temperature-increasing cover for a hot water boiler. Background technique: [0003] In existing boilers, most of the combustion chambers surrounded by water jackets have a cylindrical structure. This structure forms a combustion method with low efficiency of flame combustion and heat release. Especially for small boilers, this combustion method has high exhaust gas temperature and high thermal efficiency. Low, and the problem of smoke and dust emissions not meeting the standards is particularly prominent. [0004] The inefficient use of this combustion method is mainly manifested in the following two aspects: [0005] 1. The flame of fuel combustion only undergoes a process of exothermic utilization, so that the goal of completely clean combustion cannot be achieved in one combustion, and the flue gas at the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23B99/00
Inventor 杨维丰
Owner 杨维丰