The drum body of the DHL type boiler is coiled and welded by Q245R steel plate, and the head is stamped with the same kind of steel plate. Maintenance manholes are provided on the heads at both ends of the drum. In order to prevent the low temperature feed water from directly contacting the higher temperature drum wall, the water supply pipe adopts a sleeve structure. The DHL type boiler manufacturing centerline of the normal water level by the is at the centerline of the drum. The drum is equipped with two high-reading water level gauges, an electric contact water level gauge, and a balance container, which can be used to install automatic water level control. In order to improve the quality of steam and reduce the salt concentration of the boiler water, a continuous blowdown pipe and a dosing pipe for water treatment in the boiler are installed on the drum, and the continuous blowdown rate is 2%.

This series of CFB boiler drums are equipped with partitions to divide the inside of the drum into front and rear parts. The water supply of the drum is introduced from the rear of the drum, and the water is evenly sent to the large-diameter centralized downcomer located on both sides of the drum through the water supply distribution pipe. After the pot water is heated by each heating surface, the soda water mixture enters the outlet header (upper header) of each heating surface. Here, water vapor is initially separated. The steam is introduced into the gas collecting pipe located in the upper steam space of the drum through the steam outlet pipe, and the boiler water is introduced into the header on the side walls of the boiler. Part of the boiler water returns to the drum to participate in the next cycle. The other part flows into the two downcomers located at the rear of the boiler and is distributed to the lower headers of each heating surface. The separated steam is introduced into the drum from the back of the drum through the steam collecting pipe, moves to both sides in the drum, baffles at both ends of the drum, enters the front half of the drum, and further passes through the corrugated plate separator on the upper part of the drum After separation, the steam is drawn from the steam pipe located in the middle of the drum.

The DHL series chain grate boiler adopts two practical new patented technologies, including the “fly ash internal circulating fluidized reburning device based on high-temperature separation”. DHL type boiler manufacturing has high thermal efficiency, low operating cost, and can run without failure for a long time. It also has the characteristics of low smoke and dust emission at the outlet of the boiler, light weight, low capital investment, chip packaging, small on-site installation workload, and short installation cycle.

This series of boiler products is an alternative to large-capacity hot water boilers. DHL series coal-fired boiler products can be used as the main heat source of central heating for cities and industrial and mining enterprises. A single unit can be used for heating with a building area of 300,000-400000m². It can also be used as a peak boiler in a thermal power plant to regulate the operation of the urban heating network. For industrial and mining enterprises that require a large amount of process hot water, the boiler can also meet their needs.

DHL type boiler manufacturing have a wide range of fuel adaptability, and can be applied to bituminous coal, lean coal, anthracite, etc. Zozen Boilers can customize the feeding system, slag discharge system, tail gas treatment system, boiler layout plan, etc. for you. The boiler’s thermal efficiency is more than 5-15% higher than that of conventional coal-fired boilers, with a high degree of automation, and requires fewer operation and maintenance personnel. At the same time, it has an advanced control system that allows you to use it safely and worry-free.

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