30results about How to "Improve coal adaptability" patented technology

This invention discloses method and differential-speed bed furnace for catalytically gasifying high-ash, high-sulfur and high-ash-melting-point coal abundant in China. The hearth is set in a pressure shell. The hearth comprises a lower hearth and an upper hearth. The lower hearth is a chamber with a wide bed diameter, working at a low speed and high temperature. There are inlets for air, coal powder, limestone, steam and catalyst on both the bottom and lateral side of the lower hearth. The upper part of the lower hearth tapers to form the upper hearth working at a high speed and high temperature. The upper hearth has a shorter inner diameter than the lower hearth. The outlet of the upper hearth is connected with a cyclone separator with the lower part connected with a falling pipe. The lower part of the falling pipe is connected with a horizontal L-shaped valve. The other end of the L-shaped valve is connected with the lateral underside of the lower hearth.

The invention provides an entrained flow gasifier for swirling melt cinder solidification. The entrained flow gasifier is divided into a pressure resistant jacket and a gasifier liner, wherein a gasification chamber, a swirling cooling chamber and a cinder solidification cooling chamber form the gasifier liner and are respectively separated by virtue of segmenting conical sealing heads; a shell of the gasification chamber is sequentially provided with a thermal insulation material layer, a cooling jacket and a wear resistant material layer from outsides to insides; a cooling water inlet is formed in the bottom of the gasification chamber, and a saturated steam outlet is formed in the side surface of the top part of the gasification chamber; a top nozzle is formed in the center of the top part of the gasification chamber, and more than 3 side nozzles are uniformly formed in the upper part of the gasification chamber along the circumference; a gasification product discharge hole is formed in the center of the segmenting conical sealing head which is arranged at the bottom of the gasification chamber; an atomization water cooling sleeve is arranged at the outer side of a gasification product discharge hole in the swirling cooling chamber, and a gas outlet is formed in the upper part of the swirling cooling chamber; a solidified cinder discharge hole is formed in the center of the segmenting conical sealing head arranged at the bottom of the cooling chamber, is connected with the solidified cinder cooling chamber and is introduced into the middle of the solidified cinder cooling chamber, and a water cooling cinder discharge hole is formed in the center of the segmenting conical sealing head arranged at the bottom of the solidified cinder cooling chamber. With the adoption of the entrained flow gasifier for swirling melt cinder solidification, waste heat is fully utilized, and the difficulty of black water is eliminated.

The invention relates to a stain-resistant additive for a boiler as well as a preparation method and application of the stain-resistant additive. The additive is prepared from the following components in parts by weight: 15 to 25 parts of tungsten ore, 10 to 20 parts of coal gangue, 20 to 30 parts of bauxite, 5 to 15 parts of chromite and 25 to 35 parts of aggregate. Compared with the prior art, the stain-resistant additive disclosed by the invention has the advantages that on the premise of not changing the structure of the boiler and operation conditions of the boiler, a melting point of easily-stained fuel ash can be effectively improved, the caking property of the easily-stained fuel ash is reduced, the problems of slagging and ash deposition of a fired easily-stained fuel boiler are remarkably reduced, the heat transfer effect of a heat exchange tube is enhanced, the flue gas loss of the boiler is reduced, and the efficiency of the boiler is improved; ventilation power consumption is reduced, and power for factories is saved; the risk that slagging affects normal work of steam and water inside the heated surface is effectively reduced, and the condition that a steam-water pipe bursts due to overheat is prevented; and corrosion of slagging to the metal tube wall is reduced. The invention aims at solving the problems of the slagging and the ash deposition of easily-stained fuel and the application range of the boiler to the easily-stained fuel is widened.

This invention relates to a wall-laid little oil ignition coal burner including a primary air pipe, a central air pipe, a high energy oil gun set horizontally in the central air pipe, inlet for inner secondary wind, an inlet for outer secondary wind, spouts of primary wind and secondary wind and a spout of a burner characterizing in setting one stage or multiple stages of diversion condensed rings on the internal wall of the primary air pipe and setting one or multiple stages of precombustion chamber at the front of the central pipe, which realizes four-stage ignition process with tiny oil and higher oil-saving rate when adjusting the peak deeply and has the function of stable and low NOx burning when the oil gun stops working.

The invention discloses a multistage separation center backflow axial cyclone burner. A traditional cyclone burner technology needs to further reduce NOx emission. A primary wind pipe elbow (1) is connected with a primary wind pipe horizontal section (2); a center wind pipe module (5) and a connected combustion stabilizing ring (7) are arranged in the center of the primary wind pipe horizontal section; a pulverized coal uniform distributor (3) is arranged in an inlet; a venturi pulverized coal concentrator (4) is arranged near an outlet; a secondary wind pipe (10), a secondary wind gate (13) and a secondary wind pipe expanding port (17) are arranged at the external of the primary wind pipe horizontal section; a ternary wind pipe (11), a ternary wind gate (14) and a ternary wind pipe expanding port (18) are arranged at the external of the secondary wind pipe; the ternary wind pipe is provided with a ternary wind cyclone adjusting mechanism (15); a quartic wind pipe (12) is arranged at the external of a ternary wind pipe; the quartic wind pipe is provided with a quartic wind cyclone adjusting mechanism (16); and an outlet of a quartic wind pipe is connected with a water cooling wall pipe screen (19). The invention is applied to the multistage separation center backflow axial cyclone burner.

The invention discloses a graded air-feed dual-swirled pulverized coal industrial furnace combustor, solving the problem of lower combustion efficiency of the conventional coal industrial furnace. The graded air-feed dual-swirled pulverized coal industrial furnace combustor comprises two parts, namely a secondary air box and a graded air box which are partitioned by an annular baffle plate; a pre-combustion chamber is arranged in the region which is enclosed by the secondary air box and the graded air box; the front section of the pre-combustion chamber is cylindrical; the middle section of the pre-combustion chamber is of a divergent conical cylinder shape; the rear section of the pre-combustion chamber is a cylinder; the front section of the pre-combustion chamber is enclosed in the secondary air box, and communicated with the secondary air box through a secondary air swirler; the middle section of the pre-combustion chamber and the rear section of the pre-combustion chamber are enclosed in the graded air box, and separated from the graded air box through an annular water cooling jacket; a graded air swirler is arranged in the outlet of the pre-combustion chamber; a primary air pipe is inserted into the pre-combustion chamber after penetrating through the secondary air box; a reflective ignition gun is inserted into the pre-combustion chamber through the centre of the primary air pipe; and the ignition position of the reflective ignition gun is arranged in the centre of the pre-combustion chamber. According to the graded air-feed dual-swirled pulverized coal industrial furnace combustor, disclosed by the invention, pulverized coal and air can be better ensured to be mixed uniformly, so that a better heat-exchange effect is reached.