Dust recovery device in phthalic anhydride packaging process

Abstract

The utility model belongs to the technical field of chemical production equipment, and discloses a dust recovery device in a phthalic anhydride packaging process, which comprises a packaging machine, and the packaging machine is provided with a blanking mechanism, a sealing mechanism and a conveying mechanism; a weighing mechanism and a discharging photoelectric sensor are arranged on the lower part of the conveying mechanism corresponding to the discharging mechanism, and a sealing photoelectric sensor is arranged on the lower part of the conveying mechanism corresponding to the sealing mechanism; a discharging dust collecting cover and a sealing dust collecting cover are arranged on the upper portion of the discharging mechanism and the upper portion of the sealing mechanism respectively, the discharging dust collecting cover is communicated with a dust remover through a pipeline and a first pneumatic valve, and the sealing dust collecting cover is communicated with the dust remover through a pipeline and a second pneumatic valve. The first pneumatic valve is interlocked with a discharging pneumatic valve of the discharging mechanism, and the second pneumatic valve is interlocked with a sealing pneumatic valve of the sealing mechanism. The dust recovery device is simple in structure and good in dust recovery effect, and ensures the safety of production and environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production equipment, and in particular relates to a dust recovery device in the packaging process of phthalic anhydride. Background Art

[0002] Phthalic anhydride, also known as phthalic anhydride, is a white flaky solid or powder, or white needle-shaped crystal with a slight odor. It is easy to sublime and slightly soluble in cold water. It is easily soluble in hot water and hydrolyzed into phthalic acid. It is soluble in ethanol, benzene and pyridine, and slightly soluble in ether. In the existing production process, when phthalic anhydride products are packaged in ton bags, the ton bags are run on the original production packaging machines, and the bagging, tying and packaging operations are performed manually. This process will generate a lot of phthalic anhydride dust, which has a great impact on the operating environment. The operators are also harmed by the dust, and the product is wasted. In addition, phthalic anhydride dust is also explosive dust. If the dust concentration increases, it will cause safety hazards. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a dust recovery device in the packaging process of phthalic anhydride, which overcomes the defects of the prior art, can effectively recover the phthalic anhydride dust escaped in the packaging process, has a simple structure, and has a good dust recovery effect, thus ensuring the safety of production and the environment.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A dust recovery device for phthalic anhydride packaging process comprises a packaging machine, wherein the packaging machine is provided with a feeding mechanism, a sealing mechanism and a conveying mechanism; a weighing mechanism and a feeding photoelectric sensor are provided at the lower part of the conveying mechanism corresponding to the feeding mechanism, and a sealing photoelectric sensor is provided at the lower part of the sealing mechanism; a feeding dust collecting hood and a sealing dust collecting hood are provided at the upper parts of the feeding mechanism and the sealing mechanism respectively, the feeding dust collecting hood is connected to a dust collector through a pipeline and a first pneumatic valve, and the sealing dust collecting hood is connected to the dust collector through a pipeline and a second pneumatic valve; the first pneumatic valve is interlocked with the feeding pneumatic valve of the feeding mechanism, and the second pneumatic valve is interlocked with the sealing pneumatic valve of the sealing mechanism; the feeding photoelectric sensor, the sealing photoelectric sensor, the first pneumatic valve, the second pneumatic valve, the feeding pneumatic valve, the sealing pneumatic valve, the feeding mechanism, the sealing mechanism, the conveying mechanism and the weighing mechanism are all electrically connected to an automatic control system.

[0006] Preferably, the packaging machine model is CZQ-E, and the manufacturer is Wuxi Lima Chemical Machinery Co., Ltd.

[0007] Preferably, the material unloading photoelectric sensor and the sealing photoelectric sensor are both infrared photoelectric sensors, with a model of E3JK-DR12 and a manufacturer of Omron Automation (China) Co., Ltd.

[0008] Preferably, the dust collector is a bag dust collector, and a phthalic anhydride collecting tank is provided at the lower part of the dust collector. The phthalic anhydride dust collected by the dust collector is collected and temporarily stored.

[0009] The model of the bag dust collector is MB100, and the manufacturer is Weifang Del Powder Equipment Technology Co., Ltd.

[0010] Preferably, the first pneumatic valve, the second pneumatic valve, the feeding pneumatic valve and the sealing pneumatic valve are all pneumatic valves of model 150#PN16. The manufacturer is Bolei (China) Control Systems Co., Ltd.

[0011] Preferably, the automatic control system is a PLC automatic control system.

[0012] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] After the produced phthalic anhydride is transported to the packaging machine, the utility model starts the unloading pneumatic valve and the first pneumatic valve at the same time to start unloading and dust collection after the unloading photoelectric sensor senses that the ton bag is transported. When the weighing mechanism detects that the weight is appropriate, the unloading pneumatic valve is closed to stop unloading, and the first pneumatic valve is closed after a set delay to stop dust collection; then the conveying mechanism is started to transport the ton bag to the sealing mechanism, and when the sealing photoelectric sensor detects that the ton bag is in place, the sealing pneumatic valve and the second pneumatic valve are started at the same time to seal and dust collection, and when the sealing is completed, the second pneumatic valve is closed after a set delay to stop dust collection; the phthalic anhydride dust sucked away by the unloading dust hood and the sealing dust hood enters the dust collector, and is collected by the dust collector and concentrated in the phthalic anhydride collection tank for standby use. Through the above treatment, the phthalic anhydride dust leaked during the packaging process is recovered and reused.

[0014] In short, the utility model can effectively recover phthalic anhydride dust escaped during the packaging process, has a simple structure, and has a good dust recovery effect, thus ensuring the safety of production and the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the process of the utility model;

[0016] In the figure, 1. unloading mechanism; 2. sealing mechanism; 3. conveying mechanism; 4. weighing mechanism; 5. unloading photoelectric sensor; 6. sealing photoelectric sensor; 7. unloading dust hood; 8. sealing dust hood; 9. first pneumatic valve; 10. dust collector; 11. second pneumatic valve; 12. phthalic anhydride collecting tank. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Embodiment 1:

[0019] like Figure 1 As shown, a dust recovery device for the packaging process of phthalic anhydride includes a packaging machine (not shown), the packaging machine is provided with a feeding mechanism 1, a sealing mechanism 2 and a conveying mechanism 3; a weighing mechanism 4 and a feeding photoelectric sensor 5 are provided at the lower part of the conveying mechanism 3 corresponding to the feeding mechanism 1, and a sealing photoelectric sensor 6 is provided at the lower part of the sealing mechanism 2; a feeding dust collecting hood 7 and a sealing dust collecting hood 8 are provided at the upper parts of the feeding mechanism 1 and the sealing mechanism 2, respectively, and the feeding dust collecting hood 7 is connected to the dust collector through a pipeline (not shown) and a first pneumatic valve 9. 10, the sealing dust hood 8 is connected to the dust collector 10 through the pipeline and the second pneumatic valve 11; the first pneumatic valve 9 is interlocked with the unloading pneumatic valve (not marked) of the unloading mechanism, and the second pneumatic valve 11 is interlocked with the sealing pneumatic valve (not marked) of the sealing mechanism 2; the unloading photoelectric sensor 5, the sealing photoelectric sensor 6, the first pneumatic valve 9, the second pneumatic valve 11, the unloading pneumatic valve, the sealing pneumatic valve, the unloading mechanism 1, the sealing mechanism 2, the conveying mechanism 3 and the weighing mechanism 4 are all electrically connected to the automatic control system (not marked).

[0020] The dust collector 10 is a bag dust collector, and a phthalic anhydride collecting tank 12 is provided at the lower part of the dust collector 10 .

[0021] During actual packaging, after the produced phthalic anhydride is transported to the packaging machine, when the unloading photoelectric sensor 5 senses that the ton bag is being transported, the conveying mechanism 3 is stopped, and the unloading pneumatic valve and the first pneumatic valve 9 are started at the same time, and unloading and dust collection are started. When the weighing mechanism detects that the unloading reaches one ton, the unloading pneumatic valve is closed to stop unloading, and the first pneumatic valve 9 is closed for thirty seconds to stop dust collection; then the conveying mechanism 3 is started to transport the ton bag to the sealing mechanism 2, and when the sealing photoelectric sensor 6 detects that the ton bag is in place, the sealing pneumatic valve and the second pneumatic valve 11 are started at the same time to seal and dust collection. When the sealing is completed, the second pneumatic valve 11 is closed for thirty seconds to stop dust collection; in this way, the phthalic anhydride dust sucked away by the unloading dust hood 7 and the sealing dust hood 8 enters the dust collector 10, and is collected by the dust collector 10 and concentrated in the phthalic anhydride collection tank 12 for standby use. Through the above treatment, the phthalic anhydride dust leaked during the packaging process is recovered and reused.

[0022] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A dust recovery device in a phthalic anhydride packaging process, characterized in that: The invention comprises a packaging machine, which is provided with a feeding mechanism, a sealing mechanism and a conveying mechanism; a weighing mechanism and a feeding photoelectric sensor are provided at the lower part of the conveying mechanism corresponding to the feeding mechanism, and a sealing photoelectric sensor is provided at the lower part corresponding to the sealing mechanism; a feeding dust hood and a sealing dust hood are provided at the upper parts of the feeding mechanism and the sealing mechanism respectively, the feeding dust hood is connected to the dust collector through a pipeline and a first pneumatic valve, and the sealing dust hood is connected to the dust collector through a pipeline and a second pneumatic valve; the first pneumatic valve is interlocked with the feeding pneumatic valve of the feeding mechanism, and the second pneumatic valve is interlocked with the sealing pneumatic valve of the sealing mechanism; the feeding photoelectric sensor, the sealing photoelectric sensor, the first pneumatic valve, the second pneumatic valve, the feeding pneumatic valve, the sealing pneumatic valve, the feeding mechanism, the sealing mechanism, the conveying mechanism and the weighing mechanism are all electrically connected to the automatic control system.

2. The dust recovery device in the phthalic anhydride packaging process according to claim 1, characterized in that: The material feeding photoelectric sensor and the sealing photoelectric sensor are both infrared photoelectric sensors.

3. The dust recovery device in the phthalic anhydride packaging process according to claim 1, characterized in that: The dust collector is a bag dust collector.

4. The dust recovery device in the phthalic anhydride packaging process according to claim 1, characterized in that: The automatic control system is a PLC automatic control system.

Images