CN207493420U - Flue gas ultra-fine grain minimum discharge cleaning system - Google Patents

Abstract

The utility model discloses a flue gas ultra-fine particle ultra-low emission purification system, which comprises a dry dust collector, a bag dust collector, and a flue gas desulfurizer connected in sequence, and an induced draft fan is installed between the bag dust collector and the flue gas desulfurizer; The bag filter includes a hopper heater at the bottom, a bag cavity at the middle, and a blowback device at the top. The hopper heater includes two rows of heating fins at the bottom of the bag filter. The bag cavity includes multiple sets of For the filter bag, there are blowing nozzles vertically corresponding to the filter bag one by one on the back blower. The dust-laden gas enters the cloth bag from the outside of the filter bag, and the dust is blocked on the outer surface of the filter bag. The purified air enters the bag, then exits from the upper part of the cloth bag, and finally is discharged through the exhaust pipe. The purification effect is good.

Description

Flue gas ultra-fine particle ultra-low emission purification system

technical field

The utility model relates to a flue gas emission purification system, in particular to a flue gas ultrafine particle ultra-low emission purification system.

Background technique

With the increase of environmental protection supervision, the maximum allowable emission concentration of soot, sulfur dioxide and nitrogen oxides in boiler flue gas and the emission limit of flue gas blackness are stipulated. It is difficult for ordinary soot tail gas purification systems to meet the flue gas purification standards. The smoke exhaust system needs to be further improved.

Utility model content

In order to solve the deficiencies of the prior art, the utility model proposes an ultra-low emission purification system for ultra-fine particles of flue gas.

The utility model adopts the following technical solutions:

Flue gas ultra-fine particle ultra-low emission purification system, including dry dust collector, bag filter, and flue gas desulfurizer connected in sequence, and an induced draft fan is installed between the bag filter and flue gas desulfurizer; the bag filter It includes a hopper heater set in the lower part, a bag cavity set in the middle, and a blowback device set on the top. The hopper heater includes two rows of heating fins set at the bottom of the bag filter. The bag cavity includes multiple sets of filter bags. There are blowing nozzles vertically corresponding to the filter bags one by one on the device.

Preferably, the bottom of the hopper heater is provided with a dust outlet, the dust outlet is connected to a screw conveyor, and the screw conveyor is connected to a discharger.

Preferably, the blowback device is also connected with a pulse control valve.

Preferably, a bag cavity thermometer is connected to the bag cavity.

Preferably, both the air inlet and the air outlet of the bag filter are provided with control valves.

Preferably, flue gas sampling ports are provided at the control valves of the air inlet and the air outlet.

The technical effects obtained by adopting the above technical scheme are as follows:

The blowback device is also connected with a pulse control valve. The compressed air is directly sprayed into the filter bag from the hole of the spray pipe on the upper part of the filter bag mouth. Adopting pulse jet dust removal technology, it has strong dust removal ability, high dust removal efficiency, low emission concentration, small air leakage rate, stable and reliable operation, and good economic benefits.

The air inlet and outlet of the bag filter are equipped with control valves. The control valves of the air inlet and outlet are equipped with flue gas sampling ports, which are convenient for sampling flue gas, checking the purification effect of the bag filter, and setting the number of backwashing according to the purification effect.

The dusty gas enters the cloth bag from the outside of the filter bag, the dust is blocked on the outer surface of the filter bag, the purified air enters the bag, then goes out from the upper part of the cloth bag, and finally is discharged through the exhaust pipe. The flue gas ultra-fine particle ultra-low emission purification system is suitable for flue gas dust removal in metallurgy, building materials, machinery, chemical industry, electric power and light industry.

Description of drawings

Figure 1 is a schematic diagram of the structure of the ultra-low emission purification system for flue gas ultrafine particles.

In the figure, 1. Dry dust collector, 2. Induced fan, 3. Flue gas desulfurizer, 4. Unloader, 5. Screw conveyor, 6. Hopper heater, 7. Bag chamber thermometer, 8. Bag chamber , 9. Bag filter, 10. Blowback device.

Detailed ways

The specific embodiment of the utility model is further described in conjunction with accompanying drawing 1:

The flue gas ultra-fine particle ultra-low emission purification system includes a dry dust collector 1, a bag filter 9, and a flue gas desulfurizer 3 connected in sequence, and an induced draft fan 2 is installed between the bag filter and the flue gas desulfurizer; The bag filter includes a hopper heater 6 at the bottom, a bag cavity 8 at the middle, and a blowback device 10 at the top. The hopper heater includes two rows of heating fins at the bottom of the bag filter. The bag cavity includes There are multiple sets of filter bags, and the blower 10 is provided with blowing nozzles vertically corresponding to the filter bags one by one.

When the flue gas ultra-fine particle ultra-low emission purification system is started or when the dust is removed, the temperature of the flue gas is too low, and the flue gas is suddenly cooled, which may cause condensation and deteriorate the working condition of the filter bag. In order to avoid this problem, the bag filter is equipped with a hopper Heater to preheat the bag filter. The bag cavity thermometer cooperates with the hopper heater to form a cycle control to maintain an appropriate temperature in the cavity.

Use organic fiber or inorganic fiber filter cloth to filter out the dust in the gas. The filter cloth filter material captures coarse dust mainly by inertial collision, and captures fine dust mainly by diffusion and sieving. The dusty gas enters the cloth bag from the outside of the filter bag, the dust is blocked on the outer surface of the filter bag, the purified air enters the bag, then goes out from the upper part of the cloth bag, and finally is discharged through the exhaust pipe.

The bottom of the hopper heater is provided with a dust outlet, the dust outlet is connected with a screw conveyor 5, and the screw conveyor is connected with a discharger 4. The unloader is a heavy hammer unloader.

The blowback device is also connected with a pulse control valve. The compressed air is directly sprayed into the filter bag from the hole of the spray pipe on the upper part of the filter bag mouth. Adopting pulse jet dust removal technology, it has strong dust removal ability, high dust removal efficiency, low emission concentration, small air leakage rate, stable and reliable operation, and good economic benefits.

The bag chamber is connected with a bag chamber thermometer 7. Real-time monitoring of chamber temperature.

The inlet and outlet air ducts are compactly arranged, and the airflow resistance is small. The air inlet and outlet of the bag filter are equipped with control valves. The control valves of the air inlet and outlet are equipped with flue gas sampling ports, which are convenient for sampling flue gas, checking the purification effect of the bag filter, and setting the number of backwashing according to the purification effect.

The flue gas ultra-fine particle ultra-low emission purification system is suitable for flue gas dust removal in metallurgy, building materials, machinery, chemical industry, electric power and light industry.

The pulse control valve, the bag cavity thermometer, and the control valves set at the air inlet and outlet of the bag filter are all connected to the central controller. The control valves of the air inlet and outlet are equipped with flue gas sampling ports, the sampling ports are connected to the sampler, the sampler is connected to the central controller, and the central controller works in a cycle.

Of course, the above descriptions are only preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments. It should be noted that any person skilled in the art can make all the Equivalent substitutions and obvious deformation forms all fall within the essential scope of this specification and should be protected by the utility model.

Claims (6)

1. flue gas ultra-fine grain minimum discharge cleaning system, which is characterized in that including sequentially connected dry collector (1), cloth Bag dust collector (9), flue gas desulfurization device (3), add air-introduced machine (2) between bag filter (9) and flue gas desulfurization device (3)；

The bag filter (9) is including being arranged on the hopper heater (6) of lower part, the bag chamber (8) for being arranged on middle part, setting Blowback device (10) at top, two rows of heating plates of the hopper heater (6) including being arranged on bag filter (9) bottom end, cloth bag Chamber (8) includes multigroup filter bag, and blowback device (10) is equipped with and filter bag vertical corresponding blow gun one by one.

2. flue gas ultra-fine grain minimum discharge cleaning system according to claim 1, which is characterized in that the hopper heating The bottom of device (6) is equipped with dust mouth, and dust mouth is connected with auger conveyor (5), and auger conveyor (5) is connected with discharger (4).

3. flue gas ultra-fine grain minimum discharge cleaning system according to claim 1, which is characterized in that the blowback device (10) it is also associated with pulse control valve.

4. flue gas ultra-fine grain minimum discharge cleaning system according to claim 1, which is characterized in that the bag chamber (8) it is connected with bag chamber thermometer (7).

5. flue gas ultra-fine grain minimum discharge cleaning system according to claim 4, which is characterized in that the bag-type dust The air inlet of device (9) and gas outlet are equipped with control valve.

6. flue gas ultra-fine grain minimum discharge cleaning system according to claim 5, which is characterized in that the air inlet and Smoke sampling mouth is equipped at the control valve of gas outlet.