CN201050793Y - Boiler high-performance energy-saving dust-removing preheating system - Google Patents

Abstract

A boiler high-efficiency energy-saving de-dust preheating system is composed of a boiler, a granite duster, an exhauster, and relative pipes. The utility model is characterized in that a preheating dust trunk composed of an air intake room, an air outlet room, a preheating room, and a dust chamber is arranged between a boiler flue and the granite duster. The preheating room is provided with a water inlet tube, a water outlet tube, and a plurality of steel tubes, the dust chamber is arranged with a water injection nozzle, the smoke of the boiler exchanges heat with water via the air inlet room in the preheating room, to increase the temperature of inlet cold water to 80-100DEG C to be fed into boiler to stabilize the steam pressure in the boiler and save fuel, the water sprayed via the nozzle from the dust chamber filters the dust in the smoke to reduce temperature and enter into the granite duster via the air outlet room to remove dust further, to be discharged via the outlet of the exhauster. The utility model has simple structure, better preheating effect and better de-dust effect, which can save fuel of boiler, feed high-temperature water, and reach first discharge standard of boiler smoke, to resolve environment pollution of boiler smoke.

Description

A boiler high-efficiency energy-saving dust removal preheating system

【Technical field】

The utility model relates to a high-efficiency, energy-saving, dust-removing and preheating system for boilers.

【Background technique】

As we all know, a boiler is a device that uses coal or oil to heat water to generate steam or output boiled water. When this kind of boiler works, it will generate a lot of smoke and dust, and take away a lot of heat at the same time. It will not only waste the heat source, but also pollute the environment; in addition, the water input into the boiler is usually cold water, and it takes a lot of heat energy to heat the cold water to boiling. . Therefore, the operating cost of the existing boiler is high, the energy consumption is large, and the pollution to the environment is large. The majority of boiler users are eager to have a boiler that can reduce energy consumption, have no or little pollution to the environment, and have low operating costs.

【Content of invention】

In order to overcome the above-mentioned defects in the operation of the existing boiler, the utility model provides a high-efficiency energy-saving dust removal and preheating system to achieve the purpose of saving energy, reducing or eliminating pollution, and reducing the operating cost of the boiler.

In order to solve its technical problems, the technical solution adopted by the utility model is: the system includes a boiler, a water supply device, a granite dust collector and an induced draft fan, and its characteristics are:

① There is a preheating dust removal box between the flue of the boiler and the granite dust collector. The box is equipped with an air inlet room, an air outlet room, a preheating water tank and a water spray dust removal room. The flue of the boiler is connected, and the outlet of the air intake chamber is connected with the air inlet of the dust removal chamber through a plurality of metal pipes passing through the preheating water tank. A plurality of metal pipes passing through the water tank are in communication with the air outlet chamber, and the outlet of the air outlet chamber is connected with the inlet of the granite dust collector through pipes.

② On the upper side wall of the preheating water tank, there are pressure relief pipes and water inlet pipes for releasing excess steam. The mouth is connected with the water inlet pipe of the boiler through the water pipe.

③ There are multiple water spray heads in the water spray dedusting chamber, and each water spray head is connected with the circulating water pump through the water delivery pipe; a slag discharge port is provided at the bottom of the water spray dedusting chamber, and a slag discharge door is provided on the slag discharge port.

④ One end of the upper part of the preheating dust removal device is an air intake chamber, and the other end is an air outlet chamber. A preheating water tank is installed in the middle of the preheating dust removal device, and multiple steel pipes are installed in the water tank. Water dedusting room, multiple steel pipes of the preheating water tank, one end communicates with the air inlet chamber, or communicates with the air outlet chamber, and the other end communicates with the dedusting chamber through the pre-plate of the water spray dedusting chamber.

⑤ One end of the granite dust collector is connected to the air outlet of the preheating dust removal device, the other end is connected to the inlet of the induced draft fan, and the air outlet of the induced draft fan is connected to the atmospheric environment.

The beneficial effects of the utility model are:

①Because there is a preheating water tank in this system, it can raise the temperature of the flue gas heat from the flue at 230-270 ℃ to the soft water in the water tank, so that the boiler can be replenished with hot water at 80-100 ℃ at all times, so as to ensure that the boiler has a stable steam pressure and at the same time It can save the energy needed to raise the cold water to 80-100 ℃, and achieve the purpose of energy saving.

②Because the system is equipped with a water spray dust collector, it is the first dust removal, so that a large amount of coarse dust in the flue gas is sprayed in the dust removal room through the water pipe to reduce the dust to the bottom of the dust removal room, and then the dust is purified by the granite dust collector for the second time. After the two-stage dust removal device, the flue gas emission from the chimney can meet the national first-level emission standard, basically eliminate the pollution of the boiler flue gas to the environment, and solve the long-awaited pollution problem.

③ Since the system cools the flue gas through the preheating tank and sprays water to remove dust and dust, the temperature of the flue gas passing through the induced draft fan is greatly reduced, which can increase the service life of the fan bearing, reduce maintenance costs, and help reduce the operating cost of the boiler.

【Description of drawings】

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the structural representation of the utility model.

In the figure: 1 boiler, 2 boiler water inlet pipe, 3 boiler flue gas pipe, 4 preheating dust removal box, 5 steel pipe, 6 air intake chamber, 7 partition, 8 air outlet chamber, 9 preheating dust removal box outlet pipe, 10 Granite dust collector, 11 Inlet pipe of induced draft fan, 12 Induced fan, 13 Outlet pipe of induced fan, 14 Pressure relief pipe, 15 Water inlet pipe of preheating tank, 16 Water level gauge, 17 Slag outlet, 18 Preheating tank, 19 Dust removal Room, 20 sprinkler heads, 21 sprinkler water pipes.

【Detailed ways】

With reference to accompanying drawing: the utility model is made up of boiler 1, preheating dedusting box 4, granite deduster 10, induced draft fan 12 and the pipeline connected with each other. It is characterized in that a preheating dust removal box 4 is connected in series between the boiler flue 3 and the stone dust collector 10, and the upper part of the preheating dust removal box is divided into an air inlet chamber 6 at one end and an air outlet chamber 8 at the other end by a partition 7 , the air inlet of the air intake chamber is connected with the flue 3 of the boiler for inputting flue gas, a preheating water tank 18 is arranged in the middle of the preheating dust removal box, and a dust removal chamber 19 is arranged at the bottom of the preheating dust removal box, A plurality of steel pipes 5 penetrating up and down are arranged in the preheating water tank. The upper end of the steel pipes communicates with the air intake chamber 6 and the lower end communicates with the dust removal chamber 19 for transporting flue gas. When the preheating chamber is filled with cold water, the flue gas passes through the steel pipe to exchange heat with the water, so that the water in the preheating chamber is heated to 80-100°C; Water pipe 15 and water level gauge 16, and the lower part of the preheating water tank is provided with a water outlet, which is connected to the boiler water inlet pipe 2 through a pipeline; a nozzle water pipe 21 is arranged in the dust removal room, and a plurality of nozzle water pipes are provided with 20, Supply water to the nozzle water pipe 21 through tap water or a circulating water pump, and the nozzle will spray water mist, so that the smoke and dust in the flue gas will be drenched by water, and then enter the air outlet chamber 8 through the steel pipe, and the side wall of the air outlet chamber is provided with a draft pipe 9 , the air induction pipe is connected with the input port of the stone dust collector 10, the air introduction port of the stone dust collector 10 is connected with the air induction pipe 11 of the induced draft fan 12 through a pipe, and the air induction pipe 13 of the induced draft fan communicates with the large chamber to The cooled and dedusted low-temperature gas is discharged into the atmosphere through the chimney, which greatly reduces the heat of the flue gas and the emission of sulfur dioxide.

Claims (5)

1. A boiler high-efficiency energy-saving dust removal preheating system, including a boiler, a water supply device, a granite dust collector and an induced draft fan, is characterized in that a preheating dust removal box is provided between the flue of the boiler and the granite dust collector, and the box The body is equipped with an air inlet chamber, an air outlet chamber, a preheating water tank and a water spray dust removal chamber. The pipe is connected with the air inlet of the dust removal chamber. The dust removal chamber is equipped with a water inlet pipe and a plurality of water nozzles. The air outlet of the dust removal chamber is connected with the air outlet chamber through a plurality of metal pipes passing through the water tank. The inlet of the dust collector is connected. 2. The boiler high-efficiency energy-saving dust removal preheating system according to claim 1 is characterized in that: a pressure relief pipe and a water inlet pipe for releasing excess steam are provided on the upper side wall of the preheating water tank, and the water inlet pipe mouth passes through the pipe and The soft water pool or the water pump are connected, and the lower side wall is provided with a water outlet pipe, and the nozzle of the water outlet pipe is connected with the water inlet pipe of the boiler through the water delivery pipe. 3. The high-efficiency energy-saving dust removal and preheating system for boilers according to claim 1 or 2 is characterized in that: a plurality of water spray heads are arranged in the water spray dust removal chamber, and each water spray head is connected with a circulating water pump through a water delivery pipe; A slag outlet is provided at the bottom of the water spray dedusting chamber, and a slag outlet is provided on the slag outlet. 4. The boiler high-efficiency energy-saving dust removal preheating system according to claim 1, characterized in that: one end of the upper part of the preheating dust removal box is an air inlet chamber, and the other end is an air outlet chamber, and the middle part of the preheating dust removal box is provided with Preheating water tank, there are many steel pipes in the water tank, and a water spray dust removal chamber is set at the lower part of the preheating dust removal box. The multiple steel pipes of the preheating water tank communicate with the air inlet room or the air outlet room at one end, and the other end is sprayed. The top plate of the water dedusting room communicates with the spraying dedusting room. 5. The boiler high-efficiency energy-saving dust removal preheating system according to claim 1, characterized in that: the air inlet of the stone dust collector is connected to the air outlet of the preheating dust removal box, and the air outlet of the stone dust collector is connected to the air outlet of the induced draft fan. The inlet is connected, and the outlet of the induced draft fan is connected with the atmospheric environment.