Calcium powder spraying system

Abstract

The utility model discloses a calcium powder spraying system which comprises a storage bin assembly and a powder spraying bin assembly. The powder spraying bin assembly comprises an electromagnetic pulse valve, a material chamber and an air spraying pipe which are communicated in sequence, and the calcium powder tank is used for supplying powder into the material chamber; an eccentric joint is communicated between the material chamber and the gas ejector pipe; and the bottoms of the material chamber, the eccentric joint and the gas ejector pipe are smoothly connected. The utility model relates to the technical field of flue gas treatment, and a calcium powder spraying device is additionally arranged at an inlet of a bag-type dust collector, so that calcium powder can be fully mixed with flue gas. The calcium powder has a large specific surface area, so that the calcium powder is endowed with extremely strong adsorption capacity and can effectively adsorb ferrous sulfide and low-ignition-point light oil in flue gas, so that the concentration of flammable components in air in the bag-type dust collector is remarkably reduced, and the risk of spontaneous combustion of a bag is greatly reduced. The calcium powder spraying system not only greatly reduces the risk of ignition of the bag-type dust collector, but also reduces the cloth bag replacement frequency and the production shutdown time caused by ignition.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, specifically a calcium powder spraying system. Background Technology

[0002] In the modern petrochemical industry, the incineration of spent catalysts from residual oil hydrotreating and the drying of molybdenum concentrate are two crucial technological processes. These processes generate flue gas containing various harmful components. This flue gas often contains a certain amount of ferrous sulfide and low-flash-point light oils, posing serious safety hazards in industrial production. Specifically, when flue gas containing ferrous sulfide and low-flash-point light oils enters a baghouse dust collector, the dust concentration within the collector becomes concentrated due to the baghouse's working principle of capturing and collecting dust through filter materials.

[0003] High concentrations of ferrous sulfide and light oil in baghouse dust collectors, due to their large contact area and suitable oxidation conditions, readily undergo oxidation reactions, releasing a large amount of heat and potentially leading to spontaneous combustion. In actual production processes, baghouse fires are commonplace, not only destroying the bags but also, in severe cases, causing the entire production line to shut down, resulting in significant economic losses and adverse social impacts for enterprises. Furthermore, the harmful gases produced during combustion cause secondary pollution to the environment. Therefore, effectively solving the problem of baghouse dust collector fires has become a pressing technical challenge for related industries. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a calcium powder spraying system, which solves the problem of bag fires that occur when existing bag filters treat flue gas containing light oil.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a calcium powder spraying system, comprising:

[0006] Storage container components, including calcium powder containers;

[0007] The powder spraying hopper assembly includes an electromagnetic pulse valve, a material chamber, and a jet pipe connected in sequence, wherein the calcium powder tank is used to supply powder into the material chamber;

[0008] The diameter of the material chamber is larger than the diameter of the jet pipe, and an eccentric joint connects the material chamber and the jet pipe; the bottoms of the material chamber, the eccentric joint, and the jet pipe are smoothly connected.

[0009] Preferably, the length direction of the calcium powder tank is perpendicular to the conveying direction of the material chamber and the conveying direction of the inlet end of the jet pipe, and the conveying direction of the material chamber and the conveying direction of the inlet end of the jet pipe are horizontal to each other.

[0010] Preferably, an elliptical end cap is provided on one side of the material chamber, and a threaded end is installed on the end cap, with the electromagnetic pulse valve installed on the threaded end.

[0011] Preferably, the electromagnetic pulse valve is connected to a compressed air supply pipe; the electromagnetic pulse valve is arranged opposite to the jet pipe.

[0012] Preferably, the discharge end of the calcium powder tank is equipped with a valve, and the bottom of the valve is connected to the material chamber.

[0013] Preferably, a pneumatic actuator is connected to the main shaft end of the valve to control the full opening and closing of the valve.

[0014] Preferably, the top of the material chamber is provided with an upper flange, which is connected to the valve.

[0015] Preferably, the discharge direction of the jet pipe is bent to form a bent portion, and the bent portion and the jet pipe are smoothly transitioned.

[0016] The beneficial effects of this invention are as follows: By using the calcium powder spraying system provided by this invention, compared with the prior art, a calcium powder spraying device is added at the inlet of the bag filter, allowing the calcium powder to be fully mixed with the flue gas. Calcium powder has a large specific surface area, which gives it extremely strong adsorption capacity, effectively adsorbing ferrous sulfide and low-ignition-point light oils in the flue gas, thereby significantly reducing the concentration of these flammable components in the air inside the bag filter and greatly reducing the risk of spontaneous combustion of the filter bags.

[0017] Furthermore, the valve and electromagnetic pulse valve combination technology of the calcium powder spraying system in this invention enables fixed intermittent spraying of calcium powder. This method not only ensures the uniform distribution of calcium powder, but also allows for adjustment of the spraying frequency and spray volume according to actual needs, making operation more flexible and the effect more significant.

[0018] The meticulous design of the material chamber, eccentric joint, and jet pipe ensures that calcium powder can be sprayed quickly and smoothly, avoiding system blockage caused by poor spraying and improving system stability and reliability. This calcium powder spraying system not only greatly reduces the risk of fire in baghouse dust collectors but also reduces the frequency of bag replacements and production downtime caused by fires. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the calcium powder spraying system of this utility model.

[0020] Explanation of reference numerals in the figure

[0021] 1. Calcium powder tank; 2. Valve; 3. Material chamber; 31. Upper flange; 32. Threaded end; 33. End cap; 34. Eccentric joint; 4. Solenoid pulse valve; 5. Jet pipe; 6. Pneumatic actuator. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation scheme as long as the effects of the present invention can be achieved.

[0023] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0024] Reference Figure 1 A calcium powder spraying system according to this embodiment is described. The system includes a storage bin assembly, a powder spraying bin assembly, and a control cabinet. The storage bin assembly supplies powder to the powder spraying bin assembly, and the powder spraying bin assembly blows the powder into the inlet of the bag filter dust collector.

[0025] In this embodiment, the storage bin assembly includes a calcium powder tank 1; the powder spraying bin assembly includes an electromagnetic pulse valve 4, a material chamber 3, and a jet pipe 5 connected in sequence; wherein, the calcium powder tank 1 supplies powder to the material chamber 3, and the discharge end of the jet pipe 5 is connected to the inlet of the bag filter; by spraying calcium powder into the bag filter, the probability of spontaneous combustion of the bag filter bags in the bag filter can be effectively reduced.

[0026] In this embodiment, a valve 2 is provided at the discharge end of the calcium powder tank 1, and the bottom of the valve 2 is connected to the material chamber 3. The valve 2 can be a ball valve or a slide gate valve.

[0027] A pneumatic actuator 6 is connected to the spindle end of valve 2 to control the full opening and closing of valve 2. During implementation, the PLC controller in the control cabinet controls the operation of the pneumatic actuator 6 and the solenoid pulse valve 4. It should be noted that when the solenoid pulse valve 4 is open, valve 2 must be in the closed state to prevent insufficient air pressure caused by high-pressure airflow blowing into the calcium powder tank 1.

[0028] In one embodiment, the material chamber 3 has three joints, namely the upper flange 31, the end cap 33 and the eccentric joint 34. The connection relationship of the three joints is described below.

[0029] The upper flange 31 is located at the top of the material chamber 3, and the valve 2 is connected to the upper flange 31. An eccentric joint 34 connects the material chamber 3 and the jet pipe 5. Specifically, the diameter of the material chamber 3 is larger than the diameter of the jet pipe 5, and the bottoms of the material chamber 3, eccentric joint 34, and jet pipe 5 are smoothly connected. An elliptical end cap 33 is located on one side of the material chamber 3, and a threaded end cap 32 is installed on the end cap 33. The electromagnetic pulse valve 4 is installed on the threaded end cap 32.

[0030] The length of the calcium powder tank 1 is perpendicular to the transmission direction of the material chamber 3 and the transmission direction of the inlet end of the jet pipe 5, so that the calcium powder in the calcium powder tank 1 can fall quickly into the material chamber 3. The transmission direction of the material chamber 3 and the transmission direction of the inlet end of the jet pipe 5 are horizontal to each other. The electromagnetic pulse valve 4 is set opposite to the jet pipe 5, so that the movement direction of the calcium powder in the material chamber 3 after being impacted by the high-pressure airflow is consistent with the direction of the inlet end of the jet pipe 5, ensuring that the calcium powder smoothly enters the jet pipe 5.

[0031] In this embodiment, a compressed air supply pipe is connected to the electromagnetic pulse valve 4.

[0032] In this embodiment, depending on the location of the bag filter, the discharge direction of the jet pipe 5 can be bent to form a bent part. The bent part is connected to the air inlet of the bag filter. It should be noted that the bent part and the jet pipe 5 have a smooth transition to ensure that the calcium powder moves smoothly in the jet pipe 5.

[0033] This embodiment provides a working mode of the system based on the above-described structural composition:

[0034] S1. Open valve 2, and close valve 2 after a delay of S1 seconds, so that the calcium powder in calcium powder tank 1 falls into material chamber 3.

[0035] S2, after a delay of S2 seconds, the electromagnetic pulse valve 4 is opened, and the strong airflow sprays the calcium powder in the material chamber 3 out through the jet pipe 5.

[0036] S3, the electromagnetic pulse valve 4 will close after the opening time is S3 seconds.

[0037] S4. Wait for S4 seconds, then repeat steps S1, S2, and S3.

[0038] By setting time S1, the weight of calcium powder entering the material chamber each time is controlled. By setting times S2 and S3, it is ensured that all calcium powder in the material chamber is blown away. The combination of S1, S2, and S3 achieves quantitative calcium powder injection.

[0039] The following is an application example based on the above working mode: S1 is set to 3 seconds, S2 to 2 seconds, S4 to 4 seconds, and S5 to 116 seconds.

[0040] Open valve 2. Heavy calcium carbonate powder flows from calcium powder tank 1 through valve 2 into the lower material chamber 3. After a 3-second delay, when the weight of heavy calcium carbonate powder in material chamber 3 reaches 60 units, close valve 2. After a 2-second delay, open electromagnetic pulse valve 4. The opening time is 4 seconds to ensure all heavy calcium carbonate powder in the material chamber is blown away, then close electromagnetic pulse valve 4. Wait 116 seconds, then reopen valve 2.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A calcium dusting system characterized by, The application relates to a calcium powder spraying device. The calcium powder spraying device comprises a storage bin assembly and a powder spraying bin assembly. The powder spraying bin assembly comprises an electromagnetic pulse valve (4), a material chamber (3) and a jet pipe (5) which are sequentially connected, and the calcium powder tank (1) is used for supplying powder into the material chamber (3). The diameter of the material chamber (3) is larger than that of the jet pipe (5), and an eccentric joint (34) is arranged between the material chamber (3) and the jet pipe (5); the bottom of the material chamber (3), the eccentric joint (34) and the jet pipe (5) are smoothly connected.

2. A calcium powder injection system according to claim 1, wherein: The length direction of the calcium powder tank (1) is perpendicular to the transmission direction of the material chamber (3) and the transmission direction of the inlet end of the jet pipe (5), and the transmission direction of the material chamber (3) and the transmission direction of the inlet end of the jet pipe (5) are horizontal to each other.

3. A calcium dusting system according to claim 1 or 2, characterised in that: An elliptical head (33) is arranged on one side of the material chamber (3), a wire head (32) is arranged on the head (33), and the electromagnetic pulse valve (4) is arranged on the wire head (32).

4. A calcium powder injection system according to claim 3, wherein: A compressed air supply pipeline is connected to the electromagnetic pulse valve (4), and the electromagnetic pulse valve (4) is arranged opposite to the jet pipe (5).

5. The calcium dusting system of claim 1 or 2, wherein: A valve (2) is arranged at the outlet end of the calcium powder tank (1), and the bottom of the valve (2) is communicated with the material chamber (3).

6. A calcium powder injection system according to claim 5, wherein: A pneumatic actuator (6) is connected to the main shaft end of the valve (2) and is used for controlling the full opening and full closing of the valve (2).

7. A calcium injection system according to claim 5, wherein: An upper flange (31) is arranged at the top of the material chamber (3), and the upper flange (31) is connected to the valve (2).

8. The calcium dusting system of claim 1 or 2, wherein: The outlet direction of the jet pipe (5) is bent to form a bending part, and the bending part and the jet pipe (5) are smoothly connected.

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