Burnout prevention control device for cloth bag of blast furnace hot blast stove

Abstract

The utility model discloses an anti-burnout control device for a cloth bag of a blast furnace hot blast stove, which belongs to the field of dust removal systems and comprises a gravity dust remover, a cloth bag dust remover and a cooling structure. The cooling structure comprises a gas pipeline, a flow dividing pipe, a connecting pipe and an electric control valve, the two ends of the gas pipeline are connected with an outlet of the gravity dust collector and an inlet of the bag-type dust collector respectively, the gravity dust collector and the bag-type dust collector are communicated through the gas pipeline, the flow dividing pipe is fixedly installed at the top of the gas pipeline, and the connecting pipe is connected with the electric control valve. The connecting pipe is fixedly installed in the middle of the top of the flow dividing pipe and communicates with the flow dividing pipe, and an electric adjusting valve is arranged at the end, away from the flow dividing pipe, of the connecting pipe. According to the anti-burnout control device for the cloth bag of the blast furnace hot blast stove, when the atomization nozzle on the inlet gas pipeline of the bag-type dust collector detects that the temperature exceeds the safety value set of the temperature of the cloth bag, the PLC can open the electric control valve to cool the gas, so that the temperature of the gas reaches the bearable temperature range of the cloth bag.

Description

Technical Field

[0001] The utility model relates to the field of dust removal systems, in particular to a blast furnace hot blast stove bag anti-burning control device. Background Art

[0002] The blast furnace gas bag dust removal system has strict requirements on the gas temperature. The inlet temperature range of the bag dust collector is generally between 80-250℃, and the maximum instantaneous temperature can reach 300℃. In actual production, due to the blast furnace raw materials, the operation of the operator and the unfavorable furnace conditions, the inlet gas temperature of the blast furnace bag dust collector often fluctuates. The gas will rise to more than 300℃ in a short time, causing the bags to burn under high temperature and affecting the safe operation of the bag system.

[0003] At present, most blast furnace hot blast furnaces generally use heat storage devices and other methods to control the gas temperature. The Chinese utility model patent with publication number CN201704348U discloses an inlet temperature stabilizing device for a bag dust removal system in the field of blast furnace gas dust removal, including a blast furnace gravity dust collector and a bag dust removal system connected by pipelines, and a heat storage buffer is connected in series between the blast furnace gravity dust collector and the bag dust removal system. The heat storage buffer is a container filled with heat storage material, and the two ends of the container are respectively connected to the blast furnace gravity dust collector and the bag dust removal system by pipelines. When the temperature of the gas entering the heat storage buffer rises rapidly, the heat storage material absorbs heat, and its outlet temperature will slowly rise. Conversely, when the temperature of the gas entering the heat storage buffer drops rapidly, its outlet temperature drops slowly. The temperature regulation function of the heat storage buffer ensures that the gas temperature at the bag inlet is within a safe range, but this method requires a large investment, a long installation period, and low practicality. Utility Model Content

[0004] In order to solve the above-mentioned problems of large investment and long installation period, the utility model provides a blast furnace hot blast furnace bag anti-burning control device, and the technical solution is as follows:

[0005] The bag filter burnout prevention control device for hot blast furnace comprises a gravity dust collector, a bag filter and a cooling structure, wherein the cooling structure is arranged between the gravity dust collector and the bag filter;

[0006] The cooling structure includes a gas pipeline, a shunt pipe, a connecting pipe and an electric regulating valve. The two ends of the gas pipeline are respectively connected to the outlet of the gravity dust collector and the inlet of the bag dust collector. The gravity dust collector and the bag dust collector are connected through the gas pipeline. The shunt pipe is fixedly installed on the top of the gas pipeline. The connecting pipe is fixedly installed in the middle of the top of the shunt pipe and is connected to the shunt pipe. The electric regulating valve is arranged at one end of the connecting pipe away from the shunt pipe.

[0007] When the temperature sensor on the gas pipe at the inlet of the bag filter detects that the temperature exceeds the safety value set for the bag temperature, it will automatically start to cool the gas until its temperature reaches the temperature range that the bag can withstand, so as to avoid burning the bag due to over-high temperature.

[0008] Preferably, the cooling structure also includes atomizing nozzles arranged on the left and right sides of the bottom of the diversion pipe, the bottom of the atomizing nozzles penetrates and extends into the interior of the gas pipeline, the number of the atomizing nozzles is four groups, the number of the atomizing nozzles in each group is two and they are equidistantly distributed.

[0009] Preferably, fixing holes corresponding to the positions of the atomizing nozzles and having sizes matching those of the atomizing nozzles are provided around the bottom of the diverter pipe, and the diverter pipe is connected to the atomizing nozzles through the fixing holes.

[0010] Preferably, the cooling structure also includes a temperature sensor and a PLC controller. The PLC controller is arranged on the bag-type dust collector. The temperature sensor is arranged on the top of the gas pipeline close to the bag-type dust collector. The temperature sensor and the electric regulating valve are both electrically connected to the PLC controller.

[0011] Preferably, a drainage mechanism is provided at the bottom of the gas pipeline, and the drainage mechanism includes a gas drainer and a drainage pipe.

[0012] Preferably, the gas drainer is arranged between the gravity dust collector and the bag dust collector, the two ends of the drain pipe are respectively connected to the bottom of the gas pipeline and the inlet of the gas drainer, and the gas pipeline is connected to the gas drainer through the drain pipe.

[0013] Preferably, an outlet pipe is provided at the top of the right side of the bag dust collector, and an inlet pipe is provided at the top of the outer surface of the gravity dust collector, which penetrates and extends to the interior of the gravity dust collector.

[0014] Preferably, a water guide pipe connected to the blast furnace area clean water main pipeline is provided on the side of the electric regulating valve away from the connecting pipe.

[0015] The cooling water generated by the cooling structure will enter the interior of the gas drainer through the drain pipe and be discharged, which can effectively prevent gas backflow and leakage.

[0016] Beneficial effects:

[0017] The beneficial effects of the technical solution of the utility model are as follows:

[0018] 1. The blast furnace hot blast furnace bag anti-burning control device, when the temperature sensor on the gas pipeline at the inlet of the bag dust collector detects that the temperature exceeds the safety value setting of the bag temperature, the PLC controller will open the electric regulating valve to cool the gas so that the gas temperature reaches the temperature range that the bag can withstand, and try to avoid burning the bag due to overhigh temperature.

[0019] 2. The blast furnace hot blast stove bag anti-burning control device, the cooling water generated by the cooling structure will enter the interior of the gas drainer through the drain pipe. The gas drainer can conveniently discharge the cooling water and gas, which can effectively prevent gas backflow and leakage, and can reduce the noise generated by the cooling water and gas in the gas pipeline, making it convenient for overall use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model of a blast furnace hot blast furnace bag anti-burning control device;

[0022] Figure 2 The utility model is a three-dimensional structural diagram of a blast furnace hot blast stove cloth bag anti-burning control device.

[0023] In the figure, 1. gravity dust collector; 2. bag dust collector; 3. gas pipeline; 4. diversion pipe; 5. connecting pipe; 6. electric regulating valve; 7. atomizing nozzle; 8. temperature sensor; 9. gas drainer; 10. drain pipe; 11. outlet pipe; 12. inlet pipe. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] like Figure 1-2As shown, the blast furnace hot blast furnace bag burnout prevention control device includes: a gravity dust collector 1, a bag dust collector 2 and a cooling structure, and the cooling structure is arranged between the gravity dust collector 1 and the bag dust collector 2;

[0026] The cooling structure includes a gas pipeline 3, a shunt pipe 4, a connecting pipe 5 and an electric regulating valve 6. The two ends of the gas pipeline 3 are respectively connected to the outlet of the gravity dust collector 1 and the inlet of the bag dust collector 2. The gravity dust collector 1 and the bag dust collector 2 are connected through the gas pipeline 3. The shunt pipe 4 is fixedly installed on the top of the gas pipeline 3. The connecting pipe 5 is fixedly installed in the middle of the top of the shunt pipe 4 and is connected to the shunt pipe 4. The electric regulating valve 6 is arranged at one end of the connecting pipe 5 away from the shunt pipe 4. A water pipe connected to the blast furnace area water purification main pipeline is arranged on the side of the electric regulating valve 6 away from the connecting pipe 5.

[0027] Specifically, the cooling structure also includes atomizing nozzles 7 arranged on the left and right sides of the bottom of the diverter pipe 4. The bottom of the atomizing nozzles 7 penetrates and extends to the interior of the gas pipeline 3. There are four groups of atomizing nozzles 7, and each group of atomizing nozzles 7 has two atomizing nozzles 7 that are equidistantly distributed. Fixed holes corresponding to the positions of the atomizing nozzles 7 and matched in size are provided around the bottom of the diverter pipe 4. The diverter pipe 4 is connected to the atomizing nozzles 7 through the fixed holes.

[0028] In this embodiment, the cooling water will enter the interior of the atomizing nozzle 7 through the water pipe, the connecting pipe 5, the diversion pipe 4 and the fixed hole in sequence, and will be spread inside the gas pipe 3 after being atomized by the atomizing nozzle 7, so as to quickly cool the gas and make the gas temperature reach the temperature range that the bag can withstand, thereby avoiding burning of the bag due to overhigh temperature.

[0029] like Figure 1-2 As shown, the cooling structure also includes a temperature sensor 8 and a PLC controller. The PLC controller is arranged on the bag-type dust collector 2. The temperature sensor 8 is arranged on the top of the gas pipeline 3 near the bag-type dust collector 2. The temperature sensor 8 and the electric regulating valve 6 are both electrically connected to the PLC controller.

[0030] In this embodiment, when the temperature sensor 8 detects that the temperature exceeds the safety value setting of the bag temperature, the PLC controller will open the electric regulating valve 6 to cool the gas, thereby automating the cooling operation without manual operation by the staff.

[0031] like Figure 1-2As shown, a drainage mechanism is provided at the bottom of the gas pipeline 3, and the drainage mechanism includes a gas drainer 9 and a drainage pipe 10. The gas drainer 9 is provided between the gravity dust collector 1 and the bag dust collector 2. Both ends of the drainage pipe 10 are respectively connected to the bottom of the gas pipeline 3 and the inlet of the gas drainer 9. The gas pipeline 3 is connected to the gas drainer 9 through the drainage pipe 10. An outlet pipe 11 is provided at the top of the right side of the bag dust collector 2, and an inlet pipe 12 is provided on the top of the outer surface of the gravity dust collector 1, which penetrates and extends to the interior of the gravity dust collector 1.

[0032] In this embodiment, the drainage structure can conveniently discharge the cooling water and gas in the gas pipeline 3, and effectively prevent the gas from flowing back and leaking.

[0033] The method of using the utility model is as follows:

[0034] The temperature sensor 8 will continuously monitor the temperature of the gas flowing through the gas pipe 3. When the temperature sensor 8 detects that the gas temperature exceeds the safety value set for the bag temperature, the PLC controller will open the electric regulating valve 6 to allow cooling water to enter the interior of the gas pipe 3 to cool the gas until the gas temperature reaches the temperature range that the bag can withstand. This can minimize the burning of the bag due to excessive temperature. The cooling water generated by the cooling structure will be discharged to the outside through the gas drainer 9, which can effectively prevent gas backflow and leakage.

[0035] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A blast furnace hot blast stove bag anti-burning control device, characterized in that: include: A gravity dust collector (1), a bag dust collector (2) and a cooling structure, wherein the cooling structure is arranged between the gravity dust collector (1) and the bag dust collector (2); The cooling structure comprises a gas pipeline (3), a shunt pipe (4), a connecting pipe (5) and an electric regulating valve (6); the two ends of the gas pipeline (3) are respectively connected to the outlet of the gravity dust collector (1) and the inlet of the bag dust collector (2); the gravity dust collector (1) and the bag dust collector (2) are connected via the gas pipeline (3); the shunt pipe (4) is fixedly installed on the top of the gas pipeline (3); the connecting pipe (5) is fixedly installed in the middle of the top of the shunt pipe (4) and is connected to the shunt pipe (4); and the electric regulating valve (6) is arranged at one end of the connecting pipe (5) away from the shunt pipe (4).

2. A blast furnace hot blast stove bag anti-burning control device according to claim 1, characterized in that: The cooling structure further comprises atomizing nozzles (7) arranged on the left and right sides of the bottom of the shunt pipe (4), the bottom of the atomizing nozzles (7) penetrates and extends into the interior of the gas pipeline (3), the number of the atomizing nozzles (7) is four groups, and the number of the atomizing nozzles (7) in each group is two and they are equidistantly distributed.

3. A blast furnace hot blast stove bag anti-burning control device according to claim 2, characterized in that: The bottom of the flow-dividing pipe (4) is provided with fixing holes corresponding to the position of the atomizing nozzle (7) and having a size that matches the position of the atomizing nozzle (7), and the flow-dividing pipe (4) is connected to the atomizing nozzle (7) through the fixing holes.

4. A blast furnace hot blast stove bag anti-burning control device according to claim 1, characterized in that: The cooling structure further comprises a temperature sensor (8) and a PLC controller, wherein the PLC controller is arranged on the bag filter (2), the temperature sensor (8) is arranged on the top of the gas pipeline (3) and close to the bag filter (2), and the temperature sensor (8) and the electric regulating valve (6) are both electrically connected to the PLC controller.

5. The blast furnace hot blast stove bag anti-burning control device according to claim 1 is characterized in that: A drainage mechanism is provided at the bottom of the gas pipeline (3), and the drainage mechanism comprises a gas drainer (9) and a drainage pipe (10).

6. A blast furnace hot blast stove bag anti-burning control device according to claim 5, characterized in that: The gas drainer (9) is arranged between the gravity dust collector (1) and the bag dust collector (2); the two ends of the drain pipe (10) are respectively connected to the bottom of the gas pipeline (3) and the inlet of the gas drainer (9); the gas pipeline (3) is connected to the gas drainer (9) through the drain pipe (10).

7. A blast furnace hot blast stove bag anti-burning control device according to claim 1, characterized in that: An outlet pipe (11) is provided at the top of the right side of the bag dust collector (2), and an inlet pipe (12) is provided at the top of the outer surface of the gravity dust collector (1) and penetrates and extends into the interior of the gravity dust collector (1).

8. A blast furnace hot blast stove bag anti-burning control device according to claim 7, characterized in that: A water guide pipe connected to the blast furnace area water purification main pipeline is provided on the side of the electric regulating valve (6) away from the connecting pipe (5).

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