Built-in biomass gasification combustion hot water boiler

Abstract

The invention discloses a built-in biomass gasification combustion hot water boiler which comprises a water heater, a biomass gasification device and a combustion chamber. The water heater comprises a water tank and a plurality of smoke pipes. The biomass gasification device is used for generating biomass gas. The combustion chamber is arranged between the water heater and the biomass gasification device and used for combusting the biomass gas and conveying smoke generated after combustion into the water heater so as to heat water in the water tank. The biomass gasification device comprises a device body, a fire grate, a fire barrier, an air sleeve and a first water jacket, wherein the interior of the device body is divided by the fire grate into a gasification reaction chamber in the middle and an air chamber on the lower portion, and the interior of the device body is divided by the fire barrier into a gas storage chamber on the upper portion and the gasification reaction chamber in the middle. Generated water vapor is supplied to the gasification reaction chamber through the first water jacket to serve as a gasification agent, cold air is preheated in the air sleeve into hot air through the air sleeve, then the hot air is supplied to the combustion chamber for combustion supporting, and the biomass gas is supplied to the combustion chamber to be combusted through the gas storage chamber.

Description

technical field [0001] The invention relates to boiler equipment, in particular to a water heater. Background technique [0002] As we all know, coal, oil, natural gas and other fossil energy resources are non-renewable resources, which have been gradually exhausted under the large-scale exploitation of human beings. In addition, these fuels will emit a large amount of toxic and harmful gases into the air when they are burned, causing serious air pollution. To this end, experts in the energy field are working hard to find renewable and clean fuels to replace fossil energy. [0003] Biomass fuel (BMF for short, such as agricultural and forestry waste, such as straw, sawdust, bagasse, rice bran, etc.) has the following characteristics: 1. The energy of BMF comes from the natural CO 2 absorption, so BMF has CO 2 The characteristics of ecological "zero" emission; 2. The combustion of BMF is mainly volatile matter, and its fixed carbon content is about 15%, which is a typical ...

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Problems solved by technology

However, this biomass water heater has the following disadvantages or deficiencies: (1), it belongs to semi-gasification combustion, and the utilization efficiency of biomass energy is low; (2), it only uses one-stage combustion, and the exhausted flue gas contains un Burned biomass causes energy waste; (3), the smoke generated by combustion is directly used to heat the inner tank without filtering and dust removal, which has certain safety hazards; (4), the structure of the water heater is simple, and the heat exchange efficiency Low; (5), the waste heat of the combustion furnace body and the waste heat of the flue gas after heating the water have not been fully recovered and utilized

However, this biomass fuel gasification hot water heater has the following disadvantages or deficiencies: (1) It uses the waste heat of biomass gas generated by gasification to heat water instead of burning biomass gas to heat water, so it belongs to a kind of waste heat Boilers are not suitable as special hot water boilers to provide hot water to users stably; (2) Biomass gas generated by gasification is directly used in water heat exchangers without filtering and dust removal, which has certain potential safety hazards

However, the high-efficiency hot water heater that fully utilizes biomass fuel has the following disadvantages or deficiencies: (1), all equipment / devices are arranged in a furnace body that can be filled with water, so all equipment / devices must be made of waterproof materials and must be Strict sealing is carried out, which increases the manufacturing cost; (2), at the same time, because all equipment / devices are set in water, maintenance is also very difficult

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