Smoke removal equipment for carbonitriding production line

Abstract

The utility model relates to the technical field of waste gas treatment equipment, in particular to smoke removal equipment for a carbonitriding production line, which comprises a shell and a fan arranged in the shell, a spray header is arranged in the shell, a partition plate is arranged in the fan and divides the interior of the shell into an upper part and a lower part, and the fan is positioned above the partition plate. A slit is formed between the side edge of the partition plate and the inner wall of the shell and communicated with the upper space and the lower space of the partition plate so that gas can flow from the position below the partition plate to the position above the partition plate, the spraying head is arranged on a gas flow path below the partition plate, hot gas flow below the partition plate transfers heat to gas flow above the partition plate through the partition plate, and heat recovery is achieved. And energy consumed by the flue gas in subsequent combustion treatment is reduced, so that the temperature of the flue gas can reach the temperature range of CO rapid oxidation, and the subsequent flue gas treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment equipment, in particular to smoke removal equipment for a carbonitriding production line. Background Art

[0002] Carbonitriding is a metal surface treatment technology that simultaneously infiltrates carbon, nitrogen, and oxygen into the metal surface at a certain temperature to improve the hardness, wear resistance, and fatigue resistance of the metal material. Due to the unique chemical reaction characteristics of this process, the flue gas produced contains high concentrations of carbon black, fly ash, and nitrogen oxides. Wet scrubbing is a common technical means to remove carbon black, fly ash, and nitrogen oxides (NOx) from the flue gas. However, after wet scrubbing, the flue gas will cool down and the humidity will increase. This requires more energy to burn and remove CO and other combustible gases in the combustion chamber, and it will prevent the various combustible gases from being completely burned, reducing the effect of the subsequent combustion treatment. Existing wet scrubbing smoke removal equipment does not take the above factors into consideration, resulting in poor exhaust smoke removal treatment. Utility Model Content

[0003] 1. Technical Problems to be Solved

[0004] The purpose of the utility model is to provide a smoke removal equipment for a carbonitriding production line, which removes carbon black in the flue gas by wet scrubbing and can heat the cooled flue gas, thereby reducing the energy consumed in the subsequent treatment of combustible gas in the combustion chamber and improving the exhaust gas treatment effect, thereby saving energy and reducing emissions.

[0005] 2. Technical Solution

[0006] The present invention is achieved through the following technical solutions:

[0007] The utility model proposes a smoke removal device for a carbonitriding production line, comprising a shell, and a fan arranged in the shell, a spray head arranged in the shell, a partition arranged in the fan, the partition dividing the shell into two parts, an upper part and an lower part, the fan is located above the partition, a slit is formed between the side edge of the partition and the inner wall of the shell, the slit connects the upper and lower spaces of the partition so that the gas can flow from the bottom of the partition to the top of the partition, the spray head is arranged on the air flow path below the partition, and the hot air flow below the partition passes through the partition to heat the air flow above the partition.

[0008] Furthermore, the partition includes a horizontal plate located in the middle, inclined plates symmetrically connected to both sides of the horizontal plate, and horizontally arranged narrow plates respectively connected to the sides of the two inclined plates. The fan is fixedly set in the middle of the partition, and a ventilation window is opened above the shell. One side of the ventilation window is opposite to the air outlet of the fan, and the other side is connected to the air duct; the slit is located between the side of the narrow plate and the side wall of the shell.

[0009] Furthermore, water collecting troughs are fixedly connected to both sides of the lower side of the shell, the sprinkler head faces the inclined plate, and the edge of the water collecting trough at least extends beyond the lowermost side of the inclined plate.

[0010] Furthermore, a busbar is fixedly connected on both sides of the shell between the water collecting tank and the sprinkler head.

[0011] Furthermore, an accommodating cavity is formed between the narrow plate and the inner top wall of the shell, and a drying filter element is arranged in the accommodating cavity.

[0012] Furthermore, the shell has a front side plate, and slots are respectively provided on both sides of the upper side of the front side plate. The drying filter element is inserted into the slots and extends into the accommodating cavity.

[0013] Furthermore, two arc-shaped guide plates are symmetrically arranged on the outside of the fan about its central axis, and an air flow opening is formed between the two arc-shaped guide plates. The air flow opening is located near the front and rear side walls of the shell to define a curved and longer gas flow channel above the partition.

[0014] 3. Beneficial Effects

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, when the fan is started, negative pressure is generated, causing the flue gas to pass through the slits below the partition and enter the upper part of the partition. When the flue gas passes through the spray area of ​​the sprinkler head, gas-liquid mixing occurs, causing carbon black, fly ash, etc. in the flue gas to adhere to the liquid droplets and be removed; before flowing to the spray area, the flue gas first passes under the partition. This part of the flue gas transfers heat through the partition and heats the flue gas above the partition that has been cooled after spraying, realizing heat recovery, reducing the energy consumed in the subsequent combustion treatment of the flue gas, and allowing the flue gas temperature to reach the temperature range for rapid oxidation of CO, thereby improving the subsequent flue gas treatment effect and saving energy and reducing emissions;

[0017] 2. The spray head can spray a weak alkaline solution to remove nitrogen oxides in the flue gas, thereby preventing the nitrogen oxides from reacting with water vapor to generate nitric acid during subsequent flue gas combustion, which can corrode the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure with part of the shell removed;

[0020] Figure 3 yes Figure 1 Schematic diagram of the explosion structure with the middle front side panel separated;

[0021] Figure 4 yes Figure 3 A partial enlarged view of part A;

[0022] 1. Housing; 101. Front side panel; 1011. Slot; 2. Fan; 3. Sprinkler head; 4. Partition; 401. Horizontal plate; 402. Inclined plate; 403. Narrow plate; 5. Slit; 6. Water collecting trough; 7. Confluence plate; 8. Accommodation chamber; 9. Drying filter element; 10. Curved guide plate; 11. Air flow outlet; 12. Air duct. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] A smoke removal equipment for carbonitriding production line, please refer to Figure 1-4 , including a shell 1, a fan 2 is provided in the shell 1, the fan 2 generates negative pressure to absorb the flue gas, and a spray head 3 is provided in the shell 1. The spray head 3 is preferably an atomizing nozzle. The spray head 3 sprays water mist to make the flue gas contact with the water vapor liquid, thereby capturing and removing particulate matter, acidic gas, heavy metals and other harmful substances in the gas.

[0025] In addition, a partition 4 is provided in the fan 2, which divides the shell 1 into two parts, an upper part and an lower part. The fan 2 is located above the partition 4, and a slit 5 is formed between the side edge of the partition 4 and the inner wall of the shell 1. The slit 5 connects the upper and lower spaces of the partition 4 so that the gas can flow from the bottom of the partition 4 to the top of the partition 4. The sprinkler head 3 is arranged on the air flow path below the partition 4. The hot air flow below the partition 4 passes through the partition 4 and transfers heat to the air flow above the partition 4.

[0026] When the fan 2 is started, negative pressure is generated, causing the flue gas to pass through the slit 5 from the bottom of the partition 4 to the top of the partition 4. When the flue gas passes through the spray area of ​​the spray head 3, gas-liquid mixing occurs, causing the carbon black, fly ash, etc. in the flue gas to adhere to the liquid droplets and be removed. Among them, the spray head 3 can spray a weak alkaline solution to remove nitrogen oxides in the flue gas, thereby preventing the nitrogen oxides from reacting with water vapor to generate nitric acid and corroding the combustion chamber in the subsequent flue gas combustion; after the flue gas is sprayed and washed, water absorbs heat from the flue gas and turns into water vapor, thereby lowering the temperature of the flue gas. Since the flue gas passes under the partition 4 before flowing to the spray area, this part of the flue gas transfers heat through the partition 4 to heat the flue gas above the partition 4 that has been cooled after spraying, thereby realizing heat recovery, reducing the energy consumed by the flue gas in subsequent combustion treatment, and allowing the flue gas temperature to reach the temperature range for rapid oxidation of CO, thereby improving the subsequent flue gas treatment speed.

[0027] In the present invention, the partition 4 comprises a central horizontal plate 401, inclined plates 402 symmetrically connected to either side of the horizontal plate 401, and horizontally arranged narrow plates 403 connected to the sides of the two inclined plates 402. The fan 2 is fixedly mounted in the middle of the partition 4. A ventilator window is provided above the housing 1. One side of the ventilator window faces the air outlet of the fan 2, while the other side connects to the air duct 12, which is connected to the combustion chamber to combust CO and other combustible gases in the flue gas. The slit 5 is located between the side of the narrow plate 403 and the sidewall of the housing 1. The inclined plates 402 increase the distance the gas travels beneath the partition 4 and through the spray area, thereby extending the time the gas spends transferring heat through the partition 4 before passing through the spray area.

[0028] Water collection troughs 6 are fixedly connected to both sides of the lower portion of the housing 1. The spray head 3 faces the inclined plate 402, and the edges of the water collection trough 6 extend at least beyond the lowest point of the inclined plate 402. A manifold 7 is fixedly connected to both sides of the housing 1, between the water collection trough 6 and the spray head 3. During operation, smoke, after being sprayed, is collected on the manifold 7 and flows into the water collection trough 6 for convenient disposal.

[0029] An accommodating chamber 8 is formed between the narrow plate 403 and the inner top wall of the housing 1. The housing 1 has a front side panel 101. Slots 1011 are provided on either side of the upper portion of the front side panel 101. A drying filter element 9 is inserted into the slots 1011 and extends into the accommodating chamber 8. The drying filter element 9 is disposed within the accommodating chamber 8. Since the flue gas increases in humidity after being sprayed, this also consumes additional heat to be heated to the required combustion temperature. Drying the exhaust gas with the drying filter element 9 effectively reduces the humidity of the exhaust gas and improves combustion efficiency.

[0030] Two curved guide plates 10 are positioned symmetrically about the central axis of fan 2. An airflow opening 11 is formed between these two curved guide plates 10. These openings 11 are located near the front and rear sidewalls of the housing 1, defining a curved, elongated gas flow path above partition 4. The presence of these curved guide plates 10 increases the length of the gas flow path above partition 4, thereby increasing the time the gas above and below partition 4 spends exchanging heat through it, thereby improving the temperature increase of the exhaust gas after spraying.

[0031] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements to the technical solution of the present invention made by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content sought to be protected by the present invention is fully set forth in the claims.

Claims

1. A smoke removal device for a carbonitriding production line, comprising a housing and a fan arranged in the housing, wherein a spray head is arranged in the housing, characterized in that: A partition is provided in the fan, which divides the shell into an upper and lower part. The fan is located above the partition. A slit is formed between the side edge of the partition and the inner wall of the shell. The slit connects the upper and lower spaces of the partition so that the gas can flow from the bottom of the partition to the top of the partition. The sprinkler head is arranged on the air flow path below the partition. The hot air flow below the partition passes through the partition to transfer heat to the air flow above the partition.

2. The smoke removal equipment for carbonitriding production line according to claim 1, characterized in that: The partition includes a horizontal plate located in the middle, inclined plates symmetrically connected to both sides of the horizontal plate, and horizontally arranged narrow plates respectively connected to the side edges of the two inclined plates. The fan is fixedly arranged in the middle of the partition, and an air duct is connected above the shell, and the air duct is opposite to the air outlet of the fan; the slit is located between the side edge of the narrow plate and the side wall of the shell.

3. The smoke removal equipment for carbonitriding production line according to claim 2, characterized in that: Water collecting troughs are fixedly connected to both sides of the lower side of the shell, the spray head faces the inclined plate, and the edge of the water collecting trough at least extends beyond the lowermost side of the inclined plate.

4. The smoke removal equipment for carbonitriding production line according to claim 3, characterized in that: The housing is internally provided with a collecting plate fixedly connected to both sides thereof between the water collecting tank and the sprinkler head.

5. The smoke removal equipment for carbonitriding production line according to claim 2, characterized in that: An accommodating cavity is formed between the narrow plate and the inner top wall of the shell, and a drying filter element is arranged in the accommodating cavity.

6. The smoke removal equipment for carbonitriding production line according to claim 5, characterized in that: The shell has a front side plate. Slots are respectively provided on both sides of the upper portion of the front side plate. The drying filter element is inserted into the slots and extends into the accommodating cavity.

7. The smoke removal equipment for carbonitriding production line according to claim 1, characterized in that: Two arc-shaped guide plates are symmetrically arranged on the outside of the fan about its central axis, and an air flow opening is formed between the two arc-shaped guide plates. The air flow opening is located near the front and rear side walls of the shell to define a curved and longer gas flow channel above the partition.

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