Directly-discharged internal feeding biomass waste heat recovery energy-saving large pot stove

By designing a direct-flow structure with cold water injected into the trough and a horizontal flue gas channel in the biomass boiler, combined with water channel heat exchange and inner and outer cylinder combustion chambers, the problems of incomplete combustion and low waste heat utilization rate are solved, achieving efficient waste heat utilization and simplified ash removal, and reducing maintenance costs.

CN224551589UActive Publication Date: 2026-07-24CHANGDE JINBAITE ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHANGDE JINBAITE ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH CO LTD
Filing Date
2025-07-09
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing biomass cooking stoves suffer from incomplete combustion, low utilization of waste heat from flue gas, inconvenient ash removal, and high-temperature flue gas that affects the lifespan of the induced draft fan, increasing maintenance costs.

Method used

Design a direct-exhaust, internally fed biomass waste heat recovery energy-saving large pot stove. Cold water is injected into the groove between the furnace and the outer shell. The flue gas is directly discharged through the horizontal flue gas channel. Heat exchange is carried out in combination with water channels and water tanks. Steam is generated by utilizing the waste heat of the flue gas. The inner and outer cylinder structure promotes uniform combustion. The ash removal device has a simplified structure.

Benefits of technology

It improves the utilization rate of flue gas waste heat, reduces energy consumption and maintenance costs, promotes complete combustion, and simplifies the ash removal process.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224551589U_ABST
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Abstract

This utility model discloses a direct-vent, internally fed biomass waste heat recovery energy-saving large-scale cooking stove, belonging to the field of cooking stoves. It includes a furnace chamber, characterized by an outer shell surrounding the furnace chamber, with a partition groove forming between the furnace chamber and the outer shell. A water tank communicating with the partition groove is located outside the furnace chamber, and a flue gas passage communicating with the furnace chamber is arranged within the water tank. The flue gas passage is horizontally placed, with one end of the water tank connected to a water supply tank via a water pipe, and the other end having a steam outlet. Due to the high temperature of the flue gas inside the furnace chamber, it can be driven from inside the furnace chamber into the flue gas passage. The horizontal placement of the flue gas passage greatly reduces flue gas resistance, eliminating the need for a fan to guide the flow, allowing the flue gas to be directly discharged from the stove under furnace pressure. The high-temperature flue gas, passing through the flue gas passage, heats the water in the water tank, generating steam. Furthermore, the water in the water tank and the partition groove can flow complementaryly, facilitating steam overflow.
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