Flue gas collecting device

Abstract

The utility model discloses a flue gas collecting device, which relates to the technical field of titanium sponge production and comprises a cooling pipeline, a water-cooling vertical pipe and a dust remover. One end of the cooling pipeline is connected with an outlet at the top cover of the reduction furnace, the other end of the cooling pipeline is connected with one end of the water-cooling vertical pipe, and the other end of the water-cooling vertical pipe is connected with an inlet of the dust remover. According to the flue gas collecting device, air in a pipeline is replaced through the argon inlet, and magnesium in flue gas is prevented from being ignited when meeting the air; the pressure sensor and the temperature sensor are used for detecting the pressure and the temperature in the device, the pneumatic valve is matched, the pressure and the temperature in the device are automatically adjusted, the device can automatically run, and automatic collection and filtration of smoke are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium sponge production, in particular to a smoke collecting device. Background Art

[0002] Sponge titanium is widely used in chemical industry, petroleum, light industry, metallurgy, textile, construction, medical treatment, sports, daily production and other fields.

[0003] The patent with publication number CN107858533A discloses a production system and method of titanium sponge, which mainly includes: a reaction system and a combustion system, wherein the reaction system includes: a reaction chamber, a titanium tetrachloride heating tank, a metal magnesium heating tank and a cooling tank, wherein a flue gas channel is arranged in the outer ring of the reaction chamber; the titanium tetrachloride heating tank is connected to the inlet at one end of the reaction chamber, and the metal magnesium heating tank is connected to the inlet at the other end of the reaction chamber; the inlet of the cooling tank is connected to the outlet of the reaction chamber, and the titanium tetrachloride outlet of the cooling tank is connected to the titanium tetrachloride heating tank; the combustion system includes: at least one pair of combustion chambers, the combustion chambers are respectively located on both sides of the reaction chamber and are connected to the flue gas channel. The present invention solves the problems of long time, intermittent production, low efficiency, etc. in the preparation of titanium sponge by magnesium thermal reduction through the reaction form of raw material gaseous contact, effectively reduces the production cost of titanium sponge, and reduces labor intensity.

[0004] The flue gas generated during the operation of the sponge titanium reduction furnace needs to be discharged manually, which seriously pollutes the environment and affects the health and safety of employees. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a flue gas collecting device for recovering particulate matter in the flue gas.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a fume collecting device, comprising a cooling pipe, a water-cooling vertical pipe and a dust collector; one end of the cooling pipe is connected to the outlet at the top cover of the reduction furnace, the other end of the cooling pipe is connected to one end of the water-cooling vertical pipe, and the other end of the water-cooling vertical pipe is connected to the inlet of the dust collector.

[0008] Optionally, an argon inlet is provided on the cooling pipeline, the argon inlet is connected to the outlet end of the first fan, and the argon inlet is used to introduce argon into the smoke collection device.

[0009] Optionally, a control ball valve is provided at one end of the cooling pipe, a pressure sensor is provided in the reduction furnace, and the control ball valve and the pressure sensor are electrically connected.

[0010] Optionally, the dust collector includes a dust collection and removal system, and a plurality of filter cartridges are arranged in the middle and upper part of the dust collection and removal system; the inlet of the dust collector is located below the filter cartridges, and an outlet is arranged at the upper part of the dust collection and removal system, and the outlet is connected to one end of the outlet duct, and the other end of the outlet duct is connected to the second fan.

[0011] Optionally, a lower ash discharge cone is provided at the lower portion of the dust collection and removal system, and a pneumatic ash discharge ball valve is provided at the bottom of the lower ash discharge cone.

[0012] Optionally, a silo wall vibrating motor is provided on the lower ash discharge cone, and the silo wall vibrating motor is used to vibrate the lower ash discharge cone to complete the ash discharge operation.

[0013] Optionally, the outlet of the second fan is connected to a washing tower, and the washing tower is used to spray the chloride-containing flue gas to remove dust particles.

[0014] Optionally, a temperature sensor and an oxidation valve are provided in the dust collector, wherein the temperature sensor is used to detect the temperature of the flue gas entering the dust collector; the oxidation valve is electrically connected to the temperature sensor, and the oxidation valve is used to add compressed gas into the dust collector to implement controllable slow oxidation of flammable materials.

[0015] Optionally, the dust collector is provided with an explosion relief valve, and the explosion relief valve is used to limit the maximum pressure in the dust collector.

[0016] Optionally, a straight ladder from the ground to the top of the dust collector is provided outside the dust collector.

[0017] Compared with the prior art, the utility model has achieved the following technical effects:

[0018] The smoke collecting device of the utility model replaces the air in the pipeline through the argon gas inlet to prevent the magnesium in the smoke from being ignited by the air; the pressure and temperature in the device are detected by the pressure sensor and the temperature sensor, and the pressure and temperature in the device are automatically adjusted in conjunction with the pneumatic valve, so that the device can run automatically and realize the automatic collection and filtration of the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the smoke collection device of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of a top view of the dust collection and removal system of the flue gas collection device of the present invention.

[0022] Explanation of the reference numerals: 1. Control ball valve; 2. Water-cooled vertical pipe; 3. Cooling pipe; 4. Nitrogen interface; 5. Lower ash discharge cone; 6. Dust collection and removal system; 7. Filter cartridge; 8. Exhaust pipe; 9. Roots blower; 10. Pneumatic valve; 11. Oxidation valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 and 2 As shown, this embodiment provides a flue gas collection device, including a cooling pipe 3, a water-cooled vertical pipe 2 and a dust collector; one end of the cooling pipe 3 is connected to the outlet at the top cover of the reduction furnace, the other end of the cooling pipe 3 is connected to one end of the water-cooled vertical pipe 2, and the other end of the water-cooled vertical pipe 2 is connected to the inlet of the dust collector.

[0025] The flue gas in the reduction furnace is introduced into the water-cooled vertical pipe 2 through the cooling pipe 3, and then enters the dust collector after being cooled by the water-cooled vertical pipe 2 to prevent the flue gas temperature from being too high to damage the filter cartridge 7. The dust particles in the flue gas are filtered out by the filter cartridge 7, and the titanium chloride, titanium trichloride and titanium dioxide in the flue gas are cooled and crystallized to the bottom of the pipe through the cooling pipe 3.

[0026] In this specific embodiment, an argon inlet is provided on the cooling pipe 3, and the argon inlet is connected to the outlet end of the first blower. The argon inlet is used to introduce argon into the smoke collection device to replace the original air in the pipe, so that the system environment becomes an inert environment to prevent magnesium in the smoke from igniting when encountering air. The first blower adopts a Roots blower 9.

[0027] A control ball valve 1 is provided at one end of the cooling pipe 3, and a pressure sensor is provided in the reduction furnace. The control ball valve 1 and the pressure sensor are electrically connected. According to the pressure sensor, when the pressure in the reduction furnace increases to a certain value, the control ball valve 1 is opened to release the flue gas; when the pressure in the reduction furnace decreases to a certain value, the control ball valve 1 is closed to suspend the release of the flue gas from the reduction furnace. The control ball valve 1 is connected to the gas outlet pipe and is provided with a vacuum pump for discharging the filtered flue gas.

[0028] The dust collector includes a dust collecting and removing system 6, wherein a plurality of filter cartridges 7 are arranged in the middle and upper part of the dust collecting and removing system 6, and a pulse valve is arranged in the dust collecting and removing system 6, and the pulse valve is used to spray and clean the dust in the filter cartridge 7 to restore the performance of the filter cartridge 7; the inlet of the dust collector is located below the filter cartridge 7, and an outlet is arranged at the upper part of the dust collecting and removing system 6, and the outlet is connected to one end of the air outlet pipe 8, and the other end of the air outlet pipe 8 is connected to the second fan. The second fan is a Roots blower 9.

[0029] The lower part of the dust collecting and removing system 6 is provided with a lower ash discharge cone 5, and the bottom of the lower ash discharge cone 5 is provided with a pneumatic ash discharge ball valve, which is used for ash discharge operation and ash discharge to the intermediate ash discharge system. The lower ash discharge cone is well sealed.

[0030] An inspection door or inspection hole is provided on the lower ash discharge cone 5 of the dust collecting and removing system 6, and a silo wall vibrating motor is provided on the lower ash discharge cone 5, which is used to vibrate the lower ash discharge cone 5 to complete the ash discharge operation.

[0031] The outlet of the second fan is connected to a scrubber, which is used to spray the flue gas containing chlorides to remove dust particles. The treated gas is discharged into the atmosphere.

[0032] The dust collector is provided with a temperature sensor and an oxidation valve 11. The temperature sensor is used to detect the temperature of the flue gas entering the dust collector. The oxidation valve 11 is electrically connected to the temperature sensor. The oxidation valve 11 is used to add compressed gas into the dust collector to implement controllable slow oxidation of the flammable material. Whether the oxidizable material is fully oxidized is determined by the change in the flue gas temperature.

[0033] The dust collector is provided with an explosion relief valve, which is used to limit the maximum pressure in the dust collector.

[0034] The shell wall of the dust collection system 6 is made of 6mm thick steel plate, and its bearing capacity is greater than the strength requirement of negative pressure 50KPa. The filter element of the filter cartridge 7 in the dust collection system 6 uses a metal filter material with a temperature resistance of 1500℃. The filter cartridge 7 is arranged at a spacing of 200mm to prevent the impact damage to the filter cartridge 7 caused by the smoke entering the dust collector.

[0035] A straight ladder from the ground to the top of the dust collector is provided outside the dust collector for easy maintenance.

[0036] In a further specific embodiment, the fan, the pneumatic valve 10, the pulse valve and the vibration motor are controlled by a PLC program to realize the automatic operation of the device.

[0037] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0038] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A smoke collection device, characterized in that: It includes a cooling pipe, a water-cooling vertical pipe and a dust collector; one end of the cooling pipe is connected to the outlet at the top cover of the reduction furnace, the other end of the cooling pipe is connected to one end of the water-cooling vertical pipe, and the other end of the water-cooling vertical pipe is connected to the inlet of the dust collector.

2. The smoke collecting device according to claim 1, characterized in that: The cooling pipeline is provided with an argon inlet, which is connected to the outlet end of the first fan and is used to introduce argon into the fume collecting device.

3. The smoke collecting device according to claim 1, characterized in that: A control ball valve is arranged at one end of the cooling pipe, a pressure sensor is arranged in the reduction furnace, and the control ball valve and the pressure sensor are electrically connected.

4. The smoke collecting device according to claim 1, characterized in that: The dust collector includes a dust collection and removal system, and a plurality of filter cartridges are arranged in the middle and upper part of the dust collection and removal system; the inlet of the dust collector is located below the filter cartridges, and an outlet is arranged at the upper part of the dust collection and removal system, and the outlet is connected to one end of the air outlet duct, and the other end of the air outlet duct is connected to the second fan.

5. The smoke collecting device according to claim 4, characterized in that: A lower ash discharge cone is arranged at the lower part of the dust collecting and removing system, and a pneumatic ash discharge ball valve is arranged at the bottom of the lower ash discharge cone.

6. The smoke collecting device according to claim 5, characterized in that: The lower ash discharge cone is provided with a silo wall vibrating motor, and the silo wall vibrating motor is used to vibrate the lower ash discharge cone to complete the ash discharge operation.

7. The smoke collecting device according to claim 4, characterized in that: The outlet of the second fan is connected to a washing tower, and the washing tower is used to spray the chloride-containing flue gas to remove dust particles.

8. The smoke collecting device according to claim 1, characterized in that: A temperature sensor and an oxidation valve are provided in the dust collector. The temperature sensor is used to detect the temperature of the flue gas entering the dust collector. The oxidation valve is electrically connected to the temperature sensor and is used to add compressed gas into the dust collector to implement controllable slow oxidation of flammable materials.

9. The smoke collecting device according to claim 1, characterized in that: The dust collector is provided with an explosion relief valve, and the explosion relief valve is used to limit the maximum pressure in the dust collector.

10. The smoke collecting device according to claim 1, characterized in that: A straight ladder from the ground to the top of the dust collector is arranged outside the dust collector.

Images