A coal-fired soil heating boiler

Abstract

The invention discloses an outdated coal-fired heat boiler. Thermodynamic optimization design is adopted, a spiral heating pipe is adopted for a boiler body and matched with a plurality of flue heat exchange pipes, water is heated for the first time through the spiral heating pipe in the boiler body, heated for the second time through the flue heat exchange pipes and then enters a heat circulation pipe, full absorption of heat is achieved, and automatic adding of fuel is achieved; a closed-loop negative feedback control adjusting mechanism is formed between an automatic fuel feeding device and the boiler body temperature, the rotation speed of a motor is controlled through a single chip microcomputer according to the temperature, accordingly feeding of the fuel is controlled, and stable output of the heating temperature is achieved; the outdated coal-fired heat boiler is based on dispersed heating, elements of economy, environmentally protection, practicability and efficient energy conservation are comprehensively considered, and the outdated coal-fired heat boiler is particularly suitable for heating of rural areas and remote areas in winter.

Description

technical field [0001] The invention relates to the technical field of heating and engineering thermodynamics, in particular to a novel high-efficiency distributed coal-fired soil heating boiler. Background technique [0002] At present, during winter, my country carries out centralized heating in northern urban areas according to the geographical north-south boundary, and implements a large-scale heat resource allocation mechanism. However, this measure is only limited to urban areas, and it is difficult to realize central heating projects in vast rural areas and remote towns, and can only rely on single-household decentralized heating equipment to keep warm in winter. In the vast rural areas and remote villages and towns in northern my country, the earth heating stove is a kind of heating equipment favored by rural residents. It has simple structure, convenient fuel source, good economy and good heating effect. [0003] In the prior art, the design of the earth heating fu...

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Problems solved by technology

[0003] In the prior art, the design of the earth heating furnace is rough and the thermal efficiency of the earth heating furnace is low. The fuel input of the earth heating furnace must be completed by manpower, which is time-consuming and laborious, and the degree of automation is low; due to the insufficient heat exchange area of ​​the water tank in the heating furnace, a large amount of waste heat It emits from the top of the furnace body, and when the fuel is wasted, it also increases the surface temperature of the furnace body, and it is difficult to adjust the heating temperature. For example, the Guangshen 200 type anti-burning gasification heating furnace has a manual filling interval of about 30 minutes. The heating effect drops sharply when the fuel is added; and the risk factor is increased

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