CN204285493U - Wood fuel boiler exhaust gas energy-conserving and environment-protective treatment system - Google Patents

Abstract

The utility model relates to an energy-saving and environment-friendly treatment system for tail gas of a wood fuel boiler, comprising a boiler, a smoke pipe, a water pipe, a waste heat utilization device, a water curtain dust removal device, an induced draft fan and a chimney; and bifurcated heat transfer pipes; water curtain dust removal device includes dust removal tower, annular water curtain dust removal pipe, water pump B and graded sedimentation water supply pool; boiler exhaust port, bifurcated heat transfer pipes, dust removal tower, induced draft fan and chimney pass through the smoke pipe Connected in sequence; the waste heat utilization device is connected to the boiler water inlet through a water pipe; the boiler tail gas is treated by the waste heat utilization device and the water curtain dust removal device and becomes a qualified gas with low temperature and less smoke, and finally enters the chimney through the induced draft fan and is discharged. This system not only reduces the temperature of exhaust gas and the amount of smoke, but also uses the heat of boiler exhaust to preheat boiler water, which reduces boiler energy consumption while protecting the environment and equipment such as chimneys and smoke pipes.

Description

Wood fuel boiler tail gas energy saving and environmental protection treatment system

technical field

The utility model relates to an energy-saving and environment-friendly treatment system for wood fuel boiler tail gas, in particular to an energy-saving boiler tail gas that can not only reduce the temperature of tail gas discharge and the amount of smoke, but also use the heat of boiler tail gas to preheat boiler water and recycle dust removal water. Environmentally friendly treatment system.

Background technique

Conserving energy and protecting the environment is a long-term strategic task for the sustainable development of my country's national economy and society. At present, the use of wood fuel boilers in the market has the defect that the exhaust gas treatment is not comprehensive enough.

First of all, after the boilers of some enterprises are burned, the high-temperature tail gas is directly discharged into the atmosphere, which wastes heat energy, pollutes the atmosphere, corrodes the chimney, damages the equipment, and increases the production cost of the enterprise; secondly, many enterprises use water spraying to remove dust and cool down the flue gas , it only plays the role of dust removal and cooling, without recycling waste heat, and the treated water is directly discharged, without recycling, which greatly wastes water resources; third, some enterprise boilers only have tail gas waste heat utilization devices, or only dust removal The cooling device lacks an exhaust gas treatment system that integrates waste heat utilization, dust removal and cooling, and recycling of dust removal water.

Therefore, we urgently need a low-cost, suitable boiler tail gas treatment equipment that integrates waste heat utilization, dust removal and cooling, and recycling of dust removal water.

Contents of the invention

In order to overcome the lack of an exhaust gas treatment system integrating waste heat utilization, dust removal and cooling, and recycling of dust removal water in the use of existing wood fuel boilers, the utility model provides an energy-saving and environment-friendly treatment system for wood fuel boiler tail gas.

The technical solution adopted by the utility model to solve the technical problem is: an energy-saving and environmental protection treatment system for wood fuel boiler tail gas, including a boiler, a smoke pipe, a water pipe, a waste heat utilization device, a water curtain dust removal device, an induced draft fan and a chimney; the waste heat The utilization device includes an insulated water tank, a water pump A, a preheating water tank, and a bifurcated heat transfer pipeline; the water curtain dust removal device includes a dust removal tower, an annular water curtain dust removal pipe, a water pump B, and a graded sedimentation water supply pool; the boiler smoke outlet, the bifurcation Heat transfer pipes, dust removal towers, induced draft fans and chimneys are connected sequentially through smoke pipes; boiler water inlet, heat preservation water tank, water pump A, and preheating water tank are connected sequentially through water pipes; annular water curtain dust removal pipes, water pump B and graded sedimentation water supply tanks are connected through water pipes connected in sequence; the upper part of the preheating water tank has a water inlet and the lower part has a water outlet, and the preheating tank surrounds the bifurcated heat transfer pipe; the graded sedimentation water supply pool is connected to the dust removal tower through a water pipe; the bottom of the heat preservation water tank The height is higher than the top of the boiler; the dedusting tower is divided into two towers on the left and right, and the left and right towers are connected through the upper beam through the pipe, and there are small holes evenly distributed in the middle of the left tower; the ring-shaped water curtain dedusting pipe is fixed on the dedusting tower In the middle part outside the left tower body, and in the inner part of the annular water curtain dust removal pipe ring, there are thin water outlet tubes with spray heads at the end, and the thin water outlet tubes are inserted into the small holes in the left tower body of the dust removal tower.

The left side wall of the graded sedimentation water supply tank has a dedusting waste water inlet, and the right side wall has a clean water supply inlet. The middle part is from left to right followed by a sedimentation tank 1, a sedimentation tank 2, a sedimentation tank 3 and a clean water tank. Each sedimentation tank There are sedimentation tank partition plates for separation, and a water outlet slot is opened on the upper part of the sedimentation tank partition board, and adjacent water outlet slots are arranged near different side walls of the front and rear.

The bifurcated heat transfer pipeline has smoke pipe connections on the left and right sides, and there are two closed hollow discs in the middle part, and many metal tubes are welded between the two discs, and the metal tubes are connected to the two hollow discs.

The beneficial effects of the utility model are: in terms of the structure itself, the structure is simple, the cost is low and easy to maintain, and it is easy to operate, safe and reliable; in terms of the use effect, it can integrate multiple functions of waste heat utilization, dust removal and cooling, and recycling of dust removal water , save energy, save water, protect the environment, protect equipment, and are suitable for boiler exhaust gas treatment other than wood fuel.

Description of drawings

Fig. 1 is the appearance structural diagram of the utility model.

Fig. 2 is a top view of the grading sedimentation tank of the present invention.

Fig. 3 is a front view of the bifurcated heat transfer pipeline of the present invention.

Fig. 4 is a sectional view of the dust removal tower of the present invention.

Fig. 5 is a top view of the annular water curtain dust removal pipe of the present invention.

In the figure 1. Boiler, 2. Insulated water tank, 3. Water pump A, 4. Smoke pipe, 5. Preheating water tank, 6. Dust removal tower, 7. Ring water curtain dust removal pipe, 8. Water pump B, 9. Graded sedimentation water supply Pool, 10, induced draft fan, 11, chimney, 12, bifurcation heat transfer pipe, 13, sedimentation tank one, 14, sedimentation tank two, 15, sedimentation tank three, 16, clear water tank, 17, water pipe.

Detailed ways

    In Fig. 1, Fig. 2, Fig. 3, Fig. 4, and Fig. 5, an energy-saving and environment-friendly treatment system for wood fuel boiler tail gas includes a boiler 1, a smoke pipe 4, a water pipe 17, a waste heat utilization device, a water curtain dust removal device, and an induced draft fan 10 and a chimney 11; the waste heat utilization device includes an insulated water tank 2, a water pump A3, a preheated water tank 5 and a bifurcated heat transfer pipeline 12; the water curtain dust removal device includes a dust removal tower 6, an annular water curtain dust removal pipe 7, and a water pump B8 and graded sedimentation water supply pool 9; smoke outlet of boiler 1, bifurcated heat transfer pipe 12, dust removal tower 6, induced draft fan 10 and chimney 11 are connected sequentially through smoke pipe 4; water inlet of boiler 1, heat preservation water tank 2, water pump A3, preheating The hot water tank 5 is connected sequentially through the water pipe 17; the ring-shaped water curtain dust removal pipe 7, the water pump B8 and the graded sedimentation water supply pool 9 are connected sequentially through the water pipe 17; The water tank 5 surrounds the bifurcated heat transfer pipeline 12; the graded sedimentation water supply pool 9 is connected to the dust removal tower 6 through a water pipe 17; the bottom of the heat preservation water tank 2 is higher than the top of the boiler 1; the dust removal tower is divided into two towers body, the left and right towers are connected through the upper beam through the pipe, and there are small holes evenly distributed in the middle of the left tower body; the annular water curtain dust removal pipe 7 is fixed on the outer middle part of the left tower body of the dust removal tower 6, and the annular water curtain dust removal The inner portion of the tube 7 ring is evenly distributed with thin water outlet tubes with a spray head at the end, and the thin water outlet tubes are inserted into the small holes of the tower body on the left side of the dust removal tower 6 .

The left side wall of the graded sedimentation water supply tank 9 has a dust removal waste water inlet, and the right side wall has a clear water supply inlet, and the middle part is a sedimentation tank 13, a sedimentation tank 2 14, a sedimentation tank 3 15 and a clear water tank 16 from left to right. , each sedimentation tank is separated by a sedimentation tank partition plate, the upper part of the sedimentation tank partition plate is provided with a water outlet slot, and the adjacent water outlet slots are arranged near different side walls before and after.

The bifurcated heat transfer pipes 12 have smoke pipe connections on the left and right sides, and there are two closed hollow discs in the middle part, and many metal tubes are welded between the two discs, and the metal tubes are connected to the two hollow discs.

The principle and implementation process of the utility model are as follows: during the combustion process of the boiler 1, the boiler tail gas flows through the branched heat transfer pipe 12, the dust removal tower 6, the induced draft fan 10 and the chimney 11 through each connecting smoke pipe 4 in turn, and is finally discharged; the high-temperature tail gas After flowing into the bifurcated heat transfer pipeline 12, the heat of the exhaust gas is absorbed by the water in the preheating water tank 5, the temperature of the high-temperature exhaust gas decreases, and the temperature of the water in the preheating water tank 5 rises to warm water. At the same time, the water pump A3 pumps the warm water in the preheating water tank 5 Water tank 2, the warm water in the heat preservation water tank 2 injects the warm water into the boiler 1 through its own gravity, and the water inlet of the preheating tank 5 continuously replenishes the cooling water for the tail gas; after the tail gas flows into the left part of the dust removal tower 6, the smoke in the tail gas is absorbed by the ring water The dedusting water sprayed by the curtain dedusting pipe 7 absorbs and falls, and becomes a gas with a small amount of soot and a low temperature, and then further settles the fine soot through the right part of the dedusting tower 6, and becomes a qualified gas with a low temperature and less soot, and finally It is drawn into the chimney 11 by the induced draft fan 10 and discharged; the dedusting water sprayed by the annular water curtain dedusting pipe 7 falls and flows into the graded sedimentation water supply tank 9 through the dedusting wastewater inlet, and the dedusting water flows through the first sedimentation tank 13, the second sedimentation tank 14, and the third sedimentation tank After 15, it becomes clear water and flows into clear water pool 16, and then is sucked into annular water curtain dust removal pipe 7 by water pump B8 for recycling, and clear water tank 16 clear water replenishment inlet flows into clear water to supplement the water yield lost in the dust removal process.

Claims (3)

1. An energy-saving and environment-friendly treatment system for wood fuel boiler tail gas, including boiler (1), smoke pipe (4), water pipe (17), waste heat utilization device, water curtain dust removal device, induced draft fan (10) and chimney (11); The waste heat utilization device includes a thermal insulation water tank (2), a water pump A (3), a preheating water tank (5) and a bifurcated heat transfer pipe (12); the water curtain dust removal device includes a dust removal tower (6), an annular water curtain Dust removal pipe (7), water pump B (8) and graded sedimentation water supply tank (9); boiler (1) exhaust outlet, bifurcated heat transfer pipe (12), dust removal tower (6), induced draft fan (10) and chimney (11) are connected sequentially through the smoke pipe (4); the boiler (1) water inlet, the heat preservation water tank (2), the water pump A (3), and the preheating water tank (5) are connected sequentially through the water pipe (17); the annular water curtain dust removal pipe (7), the water pump B (8) and the graded sedimentation water supply pool (9) are connected in sequence through the water pipe (17); the preheating water tank (5) has a water inlet on the upper part and a water outlet on the lower part, and the preheating water tank (5) ) surrounds the bifurcated heat transfer pipeline (12); the graded sedimentation water supply pool (9) is connected to the dust removal tower (6) through a water pipe (17); the height of the bottom of the heat preservation water tank (2) is higher than that of the top of the boiler (1) The dust removal tower (6) is divided into two left and right tower bodies, which are connected through the upper beam through the pipe, and the middle part of the left tower body is evenly distributed with small holes; the ring-shaped water curtain dust removal pipe (7) is fixed on the dust removal The outer middle part of the tower body on the left side of the tower (6), and the inner part of the annular water curtain dust removal pipe (7) is evenly distributed with thin water outlet pipes with spray heads at the end, and the thin water outlet pipes are inserted into the left part of the dust removal tower (6) In the small hole of the tower body. 2. An energy-saving and environment-friendly treatment system for wood fuel boiler tail gas according to claim 1, characterized in that: the left side wall of the graded sedimentation water supply pool (9) has an inlet for dedusting waste water, and the right side wall has a clean water supply inlet, From left to right in the middle are sedimentation tank 1 (13), sedimentation tank 2 (14), sedimentation tank 3 (15) and clear water tank (16). Each sedimentation tank is separated by a sedimentation tank partition plate. A water outlet notch is arranged on the upper part of the partition plate, and adjacent water outlet notches are arranged near different side walls of the front and rear. 3. An energy-saving and environment-friendly treatment system for wood fuel boiler tail gas according to claim 1, characterized in that: said bifurcated heat transfer pipe (12) has smoke pipe interfaces on the left and right sides, and the middle part has two closed and hollow pipes. There are many metal tubes welded between the two discs, and the metal tubes are connected to the two hollow discs.