CN104930844A - Tail heat recovery and dust removal integrated biomass boiler drying device - Google Patents

Abstract

The invention discloses an integrated biomass boiler drying device for tail heat recovery and dust removal, which comprises a boiler body, a boiler steam pipe, a boiler tail gas pipe, a boiler sewage pipe, a cyclone dust removal tail heat high-efficiency recovery device and a drying room, and a cyclone dust removal tail heat recovery device. The high-efficiency recoverer is composed of a tube-and-tube heat exchanger and a cyclone dust collector. The boiler exhaust pipe is connected to the cyclone dust collector tangentially. After the cyclone dust is removed, the dust is discharged through the air lock at the bottom of the cone. After being uniformly dispersed, it passes through the tubes, is concentrated by the upper cone bucket and then discharged through the exhaust pipe; the soft water pool is connected to the lower part of the shell side of the tube heat exchanger, and the upper part of the shell side of the tube heat exchanger is connected to the boiler body through the boiler feed water pump; The steam pipe of the boiler is connected to the fan coil in the drying room, and the fan coil is connected with a drain valve. The invention realizes the synchronous treatment of tail heat utilization and dust removal of the biomass boiler drying device, has strong practicability and broad application prospect.

Description

Tail heat recovery and dust removal integrated biomass boiler drying device

technical field

The invention relates to a drying device for a biomass boiler, in particular to an integrated biomass boiler drying device for tail heat recovery and dust removal.

Background technique

Boiler drying device is a drying device that is often used in industry. According to the type of combustion, it is mainly divided into coal-fired boiler drying device, oil-fired boiler drying device, biomass energy boiler drying device, etc. Among them, biomass boiler drying The device mainly uses biomass such as straw and firewood as combustion materials. Since biomass such as straw can be regenerated and has abundant resources, it is a drying device that is strongly advocated.

However, the existing biomass boiler drying devices generally have the defects of insufficient combustion, large smoke and dust, low thermal efficiency, and insufficient utilization of tail heat. These are obviously not in line with the energy-saving and emission-reduction policies vigorously advocated by our country at this stage, and need to be improved.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an integrated biomass boiler drying device for tail heat recovery and dust removal with simple and practical structure, sufficient tail heat utilization, high thermal efficiency, and no smoke.

In order to overcome the deficiencies in the prior art, the present invention takes the following technical solutions:

An integrated biomass boiler drying device for exhaust heat recovery and dust removal, including a boiler body, a boiler steam pipe, a boiler exhaust pipe, a boiler sewage pipe, a high-efficiency recovery device for cyclone dust removal tail heat, and a drying room, characterized in that: the cyclone dust removal tail heat The high-efficiency recoverer is composed of a tube-and-tube heat exchanger and a cyclone dust collector. The boiler tail gas pipe is connected to the cyclone dust collector tangentially. After the cyclone dust is removed, the dust is discharged through the air lock at the bottom of the cone. After being uniformly dispersed, it passes through the tubes, is concentrated by the upper cone bucket and then discharged through the exhaust pipe; the soft water pool is connected to the lower part of the shell side of the tube heat exchanger, and the upper part of the shell side of the tube heat exchanger is connected to the boiler body through the boiler feed water pump; The steam pipe of the boiler is connected to the fan coil in the drying room, and the fan coil is connected with a drain valve.

The boiler blowdown pipe is connected tangentially to the cyclone dust collector, so as to realize the cleaning of oil dirt and soot in the cyclone dust collector.

The biomass boiler exhausts the combustion tail gas through the tail gas pipe. The high-temperature tail gas contains a lot of heat energy. The high-efficiency cyclone dust removal tail heat recovery device is used for dust removal and heat recovery. The bottom of the cone discharges dust through the air locker, and the tail gas is returned to the cone through the swirling flow riser and then dispersed evenly, passing through the tubes, concentrated by the upper cone bucket, and exhausted through the exhaust pipe after dust removal and heat recovery.

The high-temperature tail gas swirling dust removal simultaneously realizes high-efficiency swirling heat exchange on the outer wall of the heat exchanger shell, so that the softened water is heated up, and the dust-removed tail gas returns through the tubes again, and the second step of tail heat recovery makes the soft water warm up again; the soft water in the soft water pool passes through the pipeline It is sent to the lower part of the shell side of the tube heat exchanger, and the heat exchange with the exhaust gas is connected to the feed pump through the pipeline from the upper part of the shell side to supply water to the boiler; the boiler steam enters the fan coil in the drying room through the steam pipe for heat supply, and the steam condensed water Automatic discharge through trap.

Boiler sewage enters the cyclone dust collector tangentially through the sewage pipe. Boiler sewage is under the pressure of the boiler, and the superheated water with too high alkalinity in the drum is discharged in an appropriate amount. After the combined airflow enters the cyclone dust collector, it is especially beneficial to the sewage. Flush the grease and soot in the cyclone dust collector.

The system performs thermal insulation treatment on high-temperature parts, and the boiler reduces the exhaust gas temperature to a very low level while completing dust removal and boiler water preheating to achieve energy saving and emission reduction and improve efficiency.

Compared with prior art, the beneficial effect of the present invention also lies in:

Creatively integrate tail heat recovery and dust removal, so that tail heat recovery and dust removal can be completed in one step, reducing equipment investment and improving work efficiency;

Through the tail gas swirl flow outside the shell side of the heat exchanger and the tail gas rising in the heat exchanger tube, two-step efficient heat exchange and tail heat recovery are performed, with extremely high efficiency and sufficient tail heat utilization;

Boiler soft water absorbs exhaust heat for heat recovery, which can significantly reduce the consumption of biomass fuel;

Boiler blowdown water is used to remove grease and soot in the cyclone separator, which is particularly efficient and convenient.

The invention realizes the synchronous treatment of tail heat utilization and dust removal of the biomass boiler drying device, has strong practicability and broad application prospect.

Description of drawings

Fig. 1 is a schematic plan view of the present invention.

Each label in the figure means:

1. Boiler body; 2. Boiler blowdown pipe; 3. Boiler exhaust pipe; 4. Cyclone dedusting tail heat high-efficiency recovery device; 5. Tangential inlet; 8. Column tube; 9. Swirl rising pipe; 10. Air locker; 11. Boiler feed water pump; 12. Exhaust pipe; 13. Soft water pool; 21. Boiler steam pipe; 22. Drying room; 23. Drying room Fan coil unit; 24. Steam trap.

Detailed ways

Now in conjunction with accompanying drawing, the present invention is described in further detail.

As shown in Figure 1, the exhaust heat recovery and dust removal integrated biomass boiler drying device includes a boiler body 1, a boiler steam pipe 21, a boiler exhaust pipe 3, a boiler sewage pipe 2, a cyclone dust removal tail heat efficient recovery device 4 and a drying room 22 , cyclone dust removal tail heat high-efficiency recovery device 4 is composed of tube-and-tube heat exchanger and cyclone dust collector, boiler exhaust pipe 3 is tangentially connected to cyclone dust collector 7, after cyclone dust removal, dust is discharged through the air locker 10 at the bottom of the cone , the tail gas is connected to the cone through the swirl riser 9, dispersed evenly, passes through the tube 8, is concentrated by the upper cone bucket and then discharged through the exhaust pipe 12; the soft water pool 13 is connected to the lower part of the shell side of the tube heat exchanger, and the tube exchange The upper part of the shell side of the heater is connected to the boiler body 1 through the boiler feed water pump 11;

The boiler blowdown pipe 2 is tangentially connected to the cyclone dust collector 7 to realize the cleaning of oil and soot in the cyclone dust collector.

The biomass boiler exhausts the combustion tail gas through the tail gas pipe 3. The high-temperature tail gas contains a large amount of heat energy. The dust removal and heat recovery are carried out by the high-efficiency cyclone tail heat recovery device 4. The tail gas enters the cyclone dust collector 7 tangentially through the inlet 5 and enters the cyclone dust collector 7 Cyclone dust removal, the dust is discharged at the bottom of the cone through the air locker 10, and the tail gas is returned to the cone through the swirl riser 9 and then dispersed evenly, passing through the column tube 8, concentrated by the upper cone bucket, and discharged through the exhaust pipe 12 Exhaust gas after dust removal and heat recovery.

The high-temperature tail gas swirling dust removal simultaneously realizes high-efficiency swirling heat exchange on the outer wall of the heat exchanger shell side, making the soft water warm up, and the dust removal tail gas returns to pass through the column tube 8 again, and the second step of tail heat recovery makes the soft water warm up again; inside the soft water pool 13 The soft water is transported into the lower part of the shell side of the tube-and-tube heat exchanger through pipelines, and the heat exchange with the exhaust gas is connected to the feed water pump 11 through pipelines from the upper part of the shell side to supply water to the boiler 1; the boiler steam enters the fan coil in the drying room 22 through the steam pipe 21 23 for heat supply, steam condensed water is automatically discharged through the steam trap 24.

The boiler sewage enters the cyclone dust collector 7 tangentially through the sewage pipe 2. The boiler sewage is under the pressure of the boiler, and the superheated water with too high alkalinity in the boiler drum is discharged in an appropriate amount. After the combined airflow enters the cyclone dust collector 7, it is particularly beneficial. The sewage washes the grease and soot in the cyclone dust collector.

The system performs thermal insulation treatment on high-temperature parts, and the boiler reduces the exhaust gas temperature to a very low level while completing dust removal and boiler water preheating to achieve energy saving and emission reduction and improve efficiency.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (2)

1. a tail recuperation of heat dedusting integral biomass boiler drying unit, comprises boiler body, Boiler Steam pipe, boiler exhaust gas pipe, boiler water blow-down pipe, the hot high-efficiency recoverer of cyclone dust removal tail and drying room, it is characterized in that; The hot high-efficiency recoverer of cyclone dust removal tail is formed by stacking by tubular heat exchanger and cyclone dust collectors, boiler exhaust gas pipe tangentially connects cyclone dust collectors, dust is discharged at the cone end by wind stopping device after rotational flow dust-removing, tail gas connects cone by eddy flow tedge, through tubulation after being uniformly dispersed, being bored after bucket is concentrated by top and discharged by blast pipe; Connecting column heat exchange of heat pipe shell side bottom, soft water pond, tubular heat exchanger shell side top connects boiler body through boiler feed pump; Boiler Steam pipe connects the fan coil in drying room, and fan coil is connected with drain valve.

2. tail recuperation of heat dedusting integral biomass boiler drying unit according to claim 1, is characterized in that: described boiler water blow-down pipe tangentially connects cyclone dust collectors, realizes the cleaning to grease in cyclone dust collectors and crock.