A biomass briquette fuel hot water boiler system

Abstract

The invention relates to a biomass briquette hot water boiler system. The biomass briquette hot water boiler system is characterized by comprising a boiler, a water circulation system, a fire grate and combustion system, a heat transfer system, a briquette fuel feeding system, a dust removal system, an induced draught system, a flue gas recirculation system, a solar photovoltaic power system and a control system; fuel in the briquette fuel feeding system enters the fire grate and combustion system through a feeding opening in the lower end of the boiler and is used for combustion, high-temperature flue gas generated during combustion heats low-temperature water in the water circulation system through the heat transfer system, the heated high-temperature water is conveyed to a glasshouse, the low-temperature flue gas enters the dust removal system through a smoke outlet of the heat transfer system, the flue gas obtained after dust removal is conducted through the dust removal system is extracted by the induced draught system, part of the flue gas is exhausted through a chimney, the other part of the flue gas enters the fire gate and combustion system through the flue gas recirculation system, and furthermore a small part of flue gas is extracted and used for supplementing carbon dioxide required by the photosynthesis of crops to the glasshouse. The biomass briquette hot water boiler system can be widely applied to a renewable energy source heating system.

Description

technical field [0001] The invention relates to the fields of renewable energy heating and high efficiency and energy saving, in particular to a biomass briquette fuel hot water boiler system. Background technique [0002] The heating demand of industrial and civil buildings and crop greenhouses in northern my country is very large in winter. The development and utilization of renewable energy heating systems, especially the comprehensive integrated heating system with complementary multi-energy, will help reduce the consumption of fossil energy such as coal and reduce smog pollution. , protect the ecological environment, and promote sustainable economic and social development in urban and rural areas, which is of great significance. my country is a large agricultural country, and the scale of forest product processing is also very large. The total amount of crop stalks, fruit branches, and other agricultural and forestry product processing residues that can be used as fuel i...

AI Technical Summary

Problems solved by technology

[0005] 1. For boilers fired with chain grate or reciprocating grate, the ratio of primary air to secondary air and the distribution of primary air along the length of the grate are generally not available, and there is no effective means to control and adjust with load changes

[0006] 2. The temperature of the grate fuel layer and its upper surface is likely to exceed the ash melting point of the biomass briquette fuel, resulting in slagging and affecting the normal ventilation of the grate and the normal combustion of the fuel

[0007] 3. The heating surface of the water-cooled wall is a smooth round tube, and the tubes are sealed with refractory materials. The radiation heat transfer intensity per unit area of ​​the furnace wall is low, and the furnace body is large, the furnace wall is heavy, and the thermal response is slow.

[0008] 4. The strong oxidizing atmosphere in the fuel combustion area is not conducive to reducing the concentration of NOx in the flue gas

[0009] 5. The level of automatic adjustment and control of boiler operation is low, and it is difficult to improve boiler efficiency and reduce the concentration of air pollutant emissions due to the experience of boiler workers.

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