Replace the 2610 gas stove with a ZWL2800 type conical gas generator

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The ZWL2800 type conical gas generator – the size of the gas furnace is determined by the inner diameter of the water jacket. Therefore, people increase the gas production by enlarging the inner diameter of the water jacket. Each expansion increases the gas production volume. However, in the past, straight-tube shapes were used for the expansion of water jackets, with conical tube shapes not being employed. To change a straight-tube jacket to a conical-tube jacket, it is first necessary to study the fuel distribution inside the furnace. In a gas stove, from top to bottom, there are the drying layer, the dry heating layer, the gasification layer, the oxidation layer, and the ash layer. Among these five layers, the chemical reaction occurs in the vaporization layer; no chemical reactions take place in the other layers. Therefore, it is the diameter at the gasification layer that directly affects the gas production rate. The upper part of the water jacket serves only as a pipe, through which the gas passes. Since the particle size of the carbon layer in this area remains unchanged, its porosity is high; although the diameter at the upper part decreases, this has no effect on gas flow. The ZWL series of conical gas stoves have the following advantages: 1. Easy to retrofit and cost-saving. When converting a £2610 or £2650 gas stove to a £2800 model, if a straight-tube jacket is used, the upper furnace body and ash bin must be replaced; if a conical jacket is used, the upper furnace body and ash bin do not need to be replaced. It saves both labor and time, as well as reducing costs. 2. It facilitates good ventilation, increases the furnace temperature, and boosts gas production. Coal is compressed layer by layer in a straight-tube jacket, becoming more compact as it goes deeper, which results in poor ventilation in the gasification zone. Inside the conical jacket, as the area increases as one moves downward, the porosity of the carbon layer improves, resulting in better ventilation. This leads to higher furnace temperatures and a higher rate of steam decomposition; under the same conditions, the temperature of the gasification layer can be increased by about 50–100°C, and the gas production volume can be significantly increased. 3. Stable operation, high safety and productivity: (1) Reduction of scaling – Gas stoves often suffer from scaling due to improper operation, and the lower part of the conical jacket helps to reduce such scaling. (2) The carbon addition and gas distribution are relatively uniform. Due to the small area at the upper part of the jacket, carbon addition is relatively uniform, reducing the occurrence of uneven distribution. The carbon layer in the furnace descends evenly and smoothly, which on one hand reduces the load on the furnace rod mechanism, and on the other hand helps to minimize gas flow imbalances, local slag formation, carbon collapse, and the occurrence of air ducts; as a result, the gas flow distribution is more even. (3) Prevent slagging and roof collapse to ensure normal production. In a straight-tube jacket, the carbon blocks in the vaporization layer soften and become sticky, and are deformed due to pressure from above; if not operated properly, slag formation and blockages can occur easily. In the conical jacket, although the carbon blocks in the vaporization layer are compressed, due to their large diameter at the bottom, slag formation will not cause blockages even if the operation is improper (there will be no phenomenon of suspended material). Renovation plan 1: Short renovation period: By taking the opportunity to replace the water jacket and furnace grates, a conical water jacket and a seven-layer hexagonal furnace grate can be installed. The gray warehouse only needs some modifications. 2. It uses the cylinder, frame, and supports of type ￠2610 gas generator; the outer diameter of the water jacket remains unchanged, while the inner diameter is enlarged to ￠2800 mm at the lower part. The water capacity is 2,250 m3, and the water evaporation rate is 750–860 kg/h. A discharge device has been added to the ash discharge section, allowing it to burn coal particles of about 8 mm in size. The slag-breaking bars are widened and lengthened, with a trapezoidal shape that is narrower at the top and wider at the bottom; they are welded directly to the inner cylinder of the jacket. The slag-breaking ribs in the lower ash area are welded into a curved shape. Solve the problems of wear at the lower part of the inner cylinder in the water jacket, as well as slag breakage and furnace suspension. 3. The furnace grates are of the type produced by Jiangsu Xingya Company, with a diameter of Φ2800 and a seven-layer design; their height is 150 mm greater than that of Φ2610 hexagonal grates. This results in an increased total ventilation volume, reduced gaps between the air ducts, less waste carried away, more efficient air distribution, as well as enhanced slag breaking capacity, making them suitable for high-load production. 4. The furnace base can remain unchanged, but it is advisable to use an S￠44.45mm double-row small steel ball rolling base device. Since the gas stove has a vertical kiln structure, the ash tray and the large gear ring are suspended on the chassis housing, while the pinion exerts a unidirectional radial thrust on the large gear ring. And the weight of the fuel and equipment generates an axial force. Single-row non-table bearings have a low capacity to withstand radial forces. Based on the movement pattern of the gray disk, the redesigned double-row bidirectional custom thrust ball bearing not only possesses the capabilities of a single-direction thrust ball bearing but can also withstand large axial thrusts. It also has the function of a radial ball bearing, capable of withstanding large thrust forces in the radial direction. At the same time, a central positioning sealing device is used, along with an electromagnetic speed-regulated chain-driven continuous transmission system; as a result, the service life of the moving components is significantly increased, power consumption is reduced, and there is no displacement of the ash tray. With the furnace enlarged, anti-flow measures become even more important. Therefore, flow prevention plates are added outside the ash tray within the chassis gray box, directly welded to the inside of the chassis gray box opening; this effectively increases the outer diameter of the ash tray, ensuring that the ash has enough distance to flow along. Fan accessories: For the modified furnace type, all other auxiliary equipment must be available in full to achieve high efficiency. Among these, the fan is crucial; the optimal process for the furnace is to raise its temperature as quickly as possible in order to store a large amount of heat for gas production. This requires the fan to have high wind pressure and a large air volume per unit of time. By using a fan with a flow rate of 600 m3/min and an air pressure of 2400–2800 mmH2O, the gas generation rate can be increased to 1200–1300 m3/m2·h, thereby significantly raising the amount of gas produced per furnace. The ash content of the ￠2800 conical gas stove is below 10%. Burn coal for the □2610 model furnace, use materials suitable for the □2610 model furnace, and supply gas for the □2800 model furnace. High output and low consumption make it the best choice for upgrading gas stoves.