CN201944827U - Hot air purification device of bituminous coal combustion boiler - Google Patents

Abstract

The utility model discloses a hot air purification device for a bituminous coal combustion boiler. The flue gas in the fire outlet of the bituminous coal combustion boiler is discharged into the air outlet channel composed of at least four hot air channels in sequence. Each combustion section is equipped with an independent clean room and air outlet channel. The coal-fired hot blast stove is mainly composed of chain boilers Burning bituminous coal, the heat generated passes through the first clean room, enters the second clean room, then enters the third clean room, then passes through the fourth clean room, fifth clean room, and finally enters the air mixing room to adjust the temperature of the tower. After passing through five purification chambers, the bituminous coal is completely burned and the ash powder is completely settled. It not only ensures no smoke but also removes dust, does not pollute the environment and reduces production costs. Not only can low-cost bituminous coal be used, but also the smoke and dust emissions fully meet the national emission standards. It has the advantages of simple structure, convenient use, low cost, no environmental pollution, guaranteed product quality, low labor intensity, high degree of automation, and good process stability. The product quality is high.

Description

Hot air purification device for bituminous coal combustion boiler

technical field

The utility model relates to a bituminous coal combustion boiler, in particular to a hot air purification device for a bituminous coal combustion boiler.

Background technique

The existing chemical industry uses anthracite or bituminous coal-smoke boilers to generate hot gas. The use of anthracite-smoke boilers to generate hot gases has the disadvantages of high cost, few resources, and long-distance transportation. The use of bituminous coal-smoke boilers to generate hot gases has large dust, large temperature fluctuations, and environmental pollution. Affect product quality, high labor intensity and other shortcomings.

Contents of the invention

The purpose of the utility model is to provide a hot air purification device for a bituminous coal combustion boiler that is simple in structure, easy to use, low in cost, free from environmental pollution, can ensure product quality, has low labor intensity, and directly uses the bituminous coal smoke boiler to generate hot air.

In order to overcome the deficiencies in the prior art, the technical solution of the utility model is solved as follows: a hot air purification device for a bituminous coal combustion boiler includes a bituminous coal combustion boiler, a coal loading machine, a slag extractor, a blower, a clean room, and an air mixing unit. Chamber, high-temperature plug-in valve, cold air regulating valve, vent valve and induced draft fan, the special feature of this utility model is that the flue gas in the fire outlet of the bituminous coal-fired boiler after combustion is sequentially discharged into at least four hot air passages Air outlet, each combustion section is provided with an independent clean room and air outlet, the smoke carried by the fire outlet is discharged into the first clean room, the cavity of the first clean room is connected with the first thermocouple, the first clean room There is a first left hot air passage on the left side; the flue gas from the first left hot air passage is discharged into the second clean room, the cavity of the second clean room is connected with a second thermocouple, and the left side of the second clean room is provided with a second left Hot air passage; the flue gas of the second left hot air passage is discharged into the third clean room, the cavity of the third clean room is connected with the first thermal resistance, and the left side of the third clean room is provided with a third left hot air passage; the third clean room The flue gas from the left hot air passage is discharged into the fourth clean room, the cavity of the fourth clean room is connected with a second thermal resistor, and the left side of the fourth clean room is provided with a fourth left hot air passage; the flue gas from the fourth left hot air passage is exhausted Enter the 5th clean room, the cavity of the 5th clean room is connected with the 3rd thermal resistance, the left side of the 5th clean room is provided with the 5th left hot air channel, the 5th left hot air channel sends the purified hot air into the mixing chamber to the hot air outlet.

Description of drawings

Fig. 1 is a block diagram of the gas purification process of the present utility model;

Figure 2 is a control block diagram of the control cabinet;

Figure 3 is a control schematic diagram of the control cabinet;

Figure 4 is a circuit connection diagram of the gas clean room.

Detailed ways

Accompanying drawing is embodiment of the utility model.

Below in conjunction with accompanying drawing, content of the invention will be further described:

As shown in Figure 1, a hot air purification device for a bituminous coal-fired boiler includes a bituminous coal-fired boiler, a coal feeder, a slag extractor, a blower, a clean room, a mixing room, a high-temperature plug valve, a cold air regulating valve, and a vent valve and induced draft fan, the flue gas in the fire outlet of the bituminous coal combustion boiler is discharged into the air outlet channel composed of at least four hot air channels in turn, and each combustion section is equipped with an independent clean room and air outlet channel. The flue gas carried by the fire outlet is discharged into the first clean room, the cavity of the first clean room is connected with the first thermocouple, and the left side of the first clean room is provided with the first left hot air channel; the flue gas of the first left hot air channel is exhausted into the second clean room, the cavity of the second clean room is connected with a second thermocouple, and the left side of the second clean room is provided with a second left hot air channel; the flue gas from the second left hot air channel is discharged into the third clean room, and the second 3. The cavity of the clean room is connected with the first thermal resistor, and the left side of the third clean room is provided with the third left hot air channel; the smoke from the third left hot air channel is discharged into the fourth clean room, and the cavity of the fourth clean room is connected with the 2 thermal resistors, the 4th left hot air channel is provided on the left side of the 4th clean room; the flue gas from the 4th left hot air channel is discharged into the 5th clean room, the cavity of the 5th clean room is connected with the 3rd thermal resistor, the 5th clean room There is a 5th left hot air channel on the left side of the chamber, and the 5th left hot air channel sends the purified hot air into the mixing chamber to the hot air outlet.

As shown in Fig. 2, Fig. 3 and Fig. 4, the C end of the main circuit is connected to a switch D ₂ , and the other end of the switch D ₂ is connected in parallel to a venting solenoid valve L through a switch K1, and a tower inlet solenoid valve L is connected in parallel through a switch K2. The IC end of the loop is connected to a switch D ₃ , the other end of the switch D ₃ is connected to the L (S-50-24) of the control switch, the N end is connected to the negative pole of the power supply, and the two ends of the L and N of the furnace thermocouple are respectively connected in parallel with The first thermocouple J1, the second thermocouple J2, the first thermal resistance J3, the second thermal resistance J4, the other end of the first thermocouple J1, the second thermocouple J2, the first thermal resistance J3, and the second thermal resistance J4 in sequence The relays XK3, XK4, XK5, and XK6 are connected respectively, and the indicator lights HD61, HD62, HD71, and HD72 are respectively connected in parallel in turn.

To sum up, this device uses bituminous coal as raw material to pass through the coal-burning machine to produce high-temperature combustible gas after conversion. The gas is ejected through the fire outlet and enters the high-temperature gas purification room for secondary combustion and polymerization purification. From the outlet of the clean room to the air mixing room, the temperature required by the process is adjusted through the cold air regulating valve, and the high-temperature gas is sucked into the powder spraying tower by the induced draft fan to dry the washing powder slurry, and the burnt coal slag is discharged through the chain grate To the slag discharge machine, sent to the trolley through the slag discharge machine to be transported away.

The device ensures a slight negative pressure in the furnace hall through the opening degree of the high-temperature plug-in valve and the operating frequency of the induced draft fan or the opening degree of the vent valve (during the oven), adjusts the temperature of the hot air entering the tower by adjusting the cold air regulating valve, and The total heat supply can be adjusted by the air volume and the air volume of the blower, and the micro-negative pressure can be maintained in the tower by adjusting the high-temperature plug-in valve, so as to achieve the stable and normal operation of the whole system and ensure normal production. .

Compared with the prior art, the utility model overcomes the defects that the anthracite or bituminous coal must be used in the past with large smoke and dust, large temperature fluctuations, environmental pollution and product quality, and high labor intensity. The use of this device can not only reduce the cost of use Bituminous coal, and smoke and dust emissions fully meet the national emission standards, with simple structure, easy to use, low cost, no environmental pollution, can guarantee product quality, low labor intensity, high degree of automation, good process stability, high product quality, white The quality is pure, the hot air entering the tower is clean without smoke and dust, so that the bituminous coal can be completely burned, and it can also save coal and reduce consumption, improve enterprise efficiency, and is widely used in the chemical industry.

Claims (1)

1. A hot-air purification device for a bituminous coal-fired boiler, which comprises a bituminous coal-fired boiler, a coal feeder, a slag extractor, a blower, a clean room, a mixed air chamber, a high-temperature plug valve, a cold-air regulating valve, a vent valve and It is composed of induced draft fan, which is characterized in that the flue gas in the fire outlet of the bituminous coal combustion boiler is discharged into the air outlet channel composed of hot air channels in turn, and each combustion section is provided with an independent clean room and air outlet channel, and the outlet The flue gas carried by the burner is exhausted into the first clean room, the cavity of the first clean room is connected with the first thermocouple, and the left side of the first clean room is provided with the first left hot air duct; the flue gas from the first left hot air duct is discharged into the In the second clean room, the cavity of the second clean room is connected with a second thermocouple, and the left side of the second clean room is provided with a second left hot air channel; the flue gas from the second left hot air channel is discharged into the third clean room, and the third The cavity of the clean room is connected with the first thermal resistor, and the left side of the third clean room is provided with the third left hot air channel; the flue gas from the third left hot air channel is discharged into the fourth clean room, and the cavity of the fourth clean room is connected with the second Thermal resistance, the left side of the fourth clean room is provided with the fourth left hot air channel; the flue gas of the fourth left hot air channel is discharged into the fifth clean room, and the cavity of the fifth clean room is connected with the third thermal resistance, the fifth clean room There is a fifth left hot air channel on the left side, which sends the purified hot air into the air mixing chamber to the hot air outlet.

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