7results about "Fire-box steam boilers" patented technology

The embodiment of the invention provides a water-cooled tubular flame low-NOx combustion structure suitable for a tubular steam generator, and relates to the technical field of combustion equipment, the water-cooled tubular flame low-NOx combustion structure comprises a furnace body and a heat exchange unit arranged in the furnace body; each heat exchange unit comprises a plurality of heat exchange pipes which are uniformly arranged in an annular array, and heat exchange longitudinal fins are connected between the adjacent heat exchange pipes; a combustion chamber is formed between the outer side wall of the heat exchange unit and the inner side wall of the furnace body, and a smoke channel communicating with the combustion chamber is formed in the inner side of the heat exchange unit. An igniter, an air inlet and a gas inlet are arranged on the side wall of the furnace body; the air inlet and the gas inlet are communicated with the combustion chamber along the tangential direction of the inner side wall of the furnace body, so that tubular flame surrounding the heat exchange unit is formed in the combustion chamber, and the high-temperature area of the tubular flame is close to the heat exchange unit as much as possible by adjusting the diameter and the length of the tubular flame; the low-temperature heat exchange tube containing heat exchange media such as water inside directly cools the high-temperature area of the tubular flame, and the effect of greatly reducing NOx emission is achieved.

This invention relates to the field of coal-fired power generation technology, and discloses a flexible temperature-adjustable coal-fired power plant boiler structure and temperature control method. The boiler structure includes a furnace with multiple flue gas outlets at the top; a dual-flue structure for single reheat units or a triple-flue structure for double reheat units. The dual-flue structure includes a main steam flue and a primary reheat flue, while the triple-flue structure also includes a secondary reheat flue. A flue gas distribution zone and flue baffles are provided between the furnace outlet and each flue inlet. Each flue contains a screen-type heating surface area, a high-temperature heating surface area, a low-temperature heating surface area, and an economizer area sequentially arranged along the flue gas flow direction. This invention achieves dynamic distribution of flue gas flow by adjusting the flue baffle opening through real-time temperature deviation acquisition. By separating the thermal paths of main steam and reheat steam, it significantly reduces the thermal coupling effect, improves the steam temperature regulation capability under low load, and is suitable for flexible configurations of T-type or π-type boilers, meeting the requirements of deep peak shaving operation.

The present invention relates to the field of steam generators, and specifically discloses a water-jacketed steam generator based on an enhanced steam-water separation mechanism, comprising an outer tube, a metal fiber burner is arranged near the middle of the outer tube, a fuel delivery unit connected to the metal fiber burner is arranged at the upper end of the outer tube, a plurality of sleeves in a ring array are arranged between the outer tube and the metal fiber burner, and a blocking component for blocking the sleeve and a cleaning component for cleaning the sleeve are arranged on the outside of the sleeve; the present invention ensures thorough cleaning of scale in the sleeve by soaking first and then flushing, that is, first controlling the cylinder to a blocking position, soaking and removing scale in the sleeve, then controlling the cylinder to a cleaning position, high-pressure cleaning of the detergent in the sleeve, and recovering the detergent, thereby reducing the influence of scale on steam generation during the continued generation of steam, improving the operating efficiency of the device, and enhancing steam-water separation.

The invention relates to the field of steam generators, in particular to a water jacket type steam generator based on an enhanced steam-water separation mechanism, which comprises an outer wrapping cylinder, a metal fiber burner is arranged in the outer wrapping cylinder close to the middle, and a fuel conveying unit connected with the metal fiber burner is arranged at the upper end of the outer wrapping cylinder. A plurality of sleeves in an annular array are arranged between the outer wrapping cylinder and the metal fiber burner, and a blocking assembly for blocking the sleeves and a cleaning assembly for cleaning the sleeves are arranged on the outer sides of the sleeves; according to the invention, thorough cleaning of scale in the sleeve is ensured through a mode of first soaking and then flushing, that is to say, the air cylinder is firstly controlled to reach a blocking position, the sleeve is soaked to remove scale, then the air cylinder is controlled to be a cleaning position, a cleaning agent in the sleeve is subjected to high-pressure cleaning, the cleaning agent is recovered and treated, and in the process of continuous steam generation, the scale in the sleeve is removed. Influence of incrustation on steam generation is reduced, operation efficiency of the device is improved, and steam-water separation is enhanced.

The present invention relates to a pressure-resistant condensing boiler, comprising a pressure-resistant housing, a heat exchanger installed in the pressure-resistant housing, a combustion chamber connected to the heat exchanger, and a cooling pipe group fixed in the heat exchanger, wherein the pressure-resistant housing is provided with a combustor joint connected to the combustion chamber, a flue gas exhaust pipe connected to the heat exchanger, a heat exchange medium inlet and a heat exchange medium outlet, the heat exchange medium flows from bottom to top in the pressure-resistant housing and the cooling pipe group, and exchanges heat with the flue gas in the heat exchanger in a counterflow manner, the heat exchanger includes two or more cylindrical heat exchange chambers, adjacent heat exchange chambers communicate with each other through a transfer flue, adjacent transfer flue are installed in a manner to be spaced apart from each other, and the last-stage heat exchange chamber where the flue gas diffuses communicates with the flue gas exhaust pipe. This pressure-resistant condensing boiler may have a simple structure and a thermal efficiency higher than 100%.

The present invention discloses a vertical water tube built-in premixed membrane-type wall-cooling burner and a gas boiler. The gas boiler includes a burner, a furnace, a heat exchanger, and a flue. The burner adopts a burning manner of premixer built-in and membrane-type wall cooling, and a central side-by-side tube bundle or an arc-side tube bundle is taken as a head of the burner, the furnace is two semi-cylindrical spaces enclosed by the burner and heat exchanger, and the heat exchanger is a water tube bundle that is connected with an upper annular header and a lower annular header and extends radially along 1-3 circles of circular arcs. The burner and the heat exchanger may be exchanged. After being burned by the burner, premixed gas generates flue gas that flushes a corresponding heat exchange region and is collected and discharged through the flue. The present invention has a compact structure, low resistance, high heat exchange efficiency, short gas process, uniform mixing and distribution, deflagration prevention, and high safety, and is suitable for blended burning of natural gas with low / zero-carbon fuel and pure fuel burning. Burning temperature is low, load is uniform, an adjustment ratio is large, and NOx emissions are low; and the burner and the heat exchanger communicate with headers by using integrally or partially detachable flanges, which has high maintainability.

Steam boilers are one of the main consumers for fossil energy. They are widely used in producing electricity through running steam turbines, besides heating or in food factories and many other fields. Steam Boilers design has developed in the last 100 years, and one of the most efficient types are the water tube boilers, which are working at high pressures to maximize efficiency. In this invention, the use of the principle of high pressurized water-steam containers and kinetic energy is optimized in a way to reduce the needed heat energy inside the furnace where the said tank will work as heat energy reservoir. All the water tubes will be circulating inside the said tank, so that the high heat energy stored inside will heat the water tubes transferring the water inside to steam. This invention will reduce the needed fuel supply for the steam boiler's furnace significantly, and this will lead to reducing CO2 emissions, therefore it is considered environment friendly.