High-pressure oxygen-assisting device

Abstract

The utility model discloses a high-pressure oxygen-assisting device which is arranged at an oxidizing chamber, evaporating crucibles are arranged at the bottom of the oxidizing chamber, the top of the oxidizing chamber is connected with a gas conveying pipeline, and the high-pressure oxygen-assisting device comprises oxygen-assisting mounting pipes which are mounted on the chamber wall of the oxidizing chamber in a penetrating manner and are in one-to-one correspondence with the evaporating crucibles, the oxygen-assisting mounting pipes are arranged to be lower than the upper nozzles of the corresponding evaporation crucibles; an oxygen-assisting air pipe is mounted on the oxygen-assisting mounting pipe in a penetrating manner, and the inner end of the oxygen-assisting air pipe obliquely blows towards the upper part of the upper nozzle; an air distribution pipe is mounted outside the oxidation chamber, and an oxygen-assisting connecting structure is arranged between the air distribution pipe and the outer end of each oxygen-assisting air pipe; and the air distribution pipe is connected with a high-pressure fan. The device can promote zinc steam to be completely oxidized and does not affect zinc oxide guiding and conveying.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler auxiliary facilities, in particular to a high-pressure oxygen-assisting device. Background Art

[0002] The production process of indirect zinc oxide is as follows: Figure 5 and Figure 6 As shown, the zinc-containing material is first melted in a melting crucible, and the molten liquid flows into an evaporating crucible, where it is continuously evaporated into zinc vapor at a high temperature of about 1000°C. The zinc vapor is sprayed into the oxidation chamber from the upper nozzle of the evaporating crucible; the zinc vapor undergoes a violent oxidation reaction when it encounters oxygen in the air, and zinc oxide particles are generated after the reaction; as shown in FIG. Figure 4 and Figure 5 As shown, the zinc oxide particles are guided to the bag collection device by an air delivery pipeline for solid-gas separation, and the solid-gas separation obtains indirect zinc oxide. Under normal circumstances, the air flow in the air delivery pipeline is mainly generated by the temperature difference between the bag collection device and the oxidation chamber, which is specifically manifested in that the low-temperature (about 220-240°C) high-density gas at the bag collection device falls to the collection bag and generates negative pressure suction in the air delivery pipeline.

[0003] In actual production, the zinc vapor ejected from the nozzle on the evaporation crucible is in the form of a continuous jet with pressure. The zinc on the periphery of the jet-like zinc vapor can fully contact with the oxygen in the oxidation chamber to generate zinc oxide particles, but the zinc in the center of the jet-like zinc vapor has less chance to contact with oxygen. There will always be a part of the zinc vapor that is not oxidized and enters the bag collection device with the wind, and finally exists in the finished zinc oxide product in the form of zinc particles. This reduces the purity of zinc oxide in the finished zinc oxide product, reduces the specific surface area, and the product fails to meet the index requirements.

[0004] The inventor tried to use the method of actively supplying air from the air door of the oxidation chamber to increase the amount of oxygen entering and improve the oxidation efficiency of zinc vapor. However, this active air supply will cause a significant drop in the ambient temperature in the oxidation chamber, which will cause part of the zinc vapor to condense into zinc particles before it can be oxidized in time. Therefore, the problem that the zinc vapor cannot be completely oxidized cannot be completely solved. At the same time, this active air supply will cause turbulence in the oxidation chamber, so that some zinc oxide particles cannot smoothly enter the air delivery pipeline and settle in the oxidation chamber. The zinc oxide settled in the oxidation chamber forms substandard zinc oxide with low purity, resulting in a waste of resources. For this reason, it is necessary to provide a means to promote the complete oxidation of zinc vapor without affecting the conduction of zinc oxide to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a high-pressure oxygen-assisting device which can promote the complete oxidation of zinc vapor and does not affect the conduction of zinc oxide.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a high-pressure oxygen-assisting device is arranged in an oxidation chamber, an evaporating crucible is arranged at the bottom of the oxidation chamber, and an air supply pipeline is connected to the top of the oxidation chamber, including an oxygen-assisting installation tube that passes through the chamber wall of the oxidation chamber and corresponds to the evaporating crucible one by one, and the oxygen-assisting installation tube is arranged lower than the upper nozzle of the corresponding evaporating crucible; an oxygen-assisting air duct is installed through the oxygen-assisting installation tube, and the inner end of the oxygen-assisting air duct is arranged to spray obliquely above the upper nozzle; an air distribution duct is installed outside the oxidation chamber, and oxygen-assisting connection structures are respectively provided between the air distribution duct and the outer ends of each of the oxygen-assisting air ducts; the air distribution duct is connected to a high-pressure fan.

[0007] As a preferred technical solution, the oxygen-assisting installation tube is arranged at a side of the evaporating crucible away from the gas delivery pipeline, and the inner end of the oxygen-assisting air duct is arranged to spray obliquely toward the gas delivery pipeline.

[0008] As a preferred technical solution, the oxygen-assisting connection structure includes a flexible connecting tube installed on the air distribution duct, a connecting thread is provided on the outer end of the oxygen-assisting air duct, a connecting nut for being installed on the connecting thread is provided on the flexible connecting tube, a sealing protrusion is provided at the end of the flexible connecting tube connected to the oxygen-assisting air duct, and a holding step for holding the sealing protrusion is provided on the inner wall of the connecting nut located away from the sealing protrusion of the oxygen-assisting air duct.

[0009] As a preferred technical solution, an air duct fixing structure is provided between the oxygen-assisting air duct and the corresponding oxygen-assisting installation pipe.

[0010] Due to the adoption of the above technical solution, a high-pressure oxygen-assisting device is arranged at the oxidation chamber, an evaporating crucible is arranged at the bottom of the oxidation chamber, and a gas delivery pipeline is connected to the top of the oxidation chamber, including an oxygen-assisting installation tube that penetrates and is installed on the chamber wall of the oxidation chamber and corresponds to the evaporating crucible one by one, and the oxygen-assisting installation tube is arranged lower than the upper nozzle of the corresponding evaporating crucible; an oxygen-assisting air duct is installed through the oxygen-assisting installation tube, and the inner end of the oxygen-assisting air duct is arranged to spray obliquely above the upper nozzle; an air distribution duct is installed outside the oxidation chamber, and an oxygen-assisting connection structure is respectively arranged between the air distribution duct and the outer end of each of the oxygen-assisting air ducts; the air distribution duct is connected to a high-pressure fan. The high-pressure fan of the utility model provides high-temperature and high-pressure air, and the high-temperature and high-pressure air forms a point beam spray above the upper nozzle through the oxygen-assisting air duct, and oxygen can rush into the center of the jet-like zinc vapor, so that the inside and outside of the jet-like zinc vapor are in contact with oxygen, and the high temperature of the air does not affect the reaction temperature of the zinc vapor, and the zinc vapor is finally oxidized completely. The point-beam type airflow has a small impact range and a clear direction, and the blowing direction is in line with the zinc vapor injection path and the upward entry of particles into the gas delivery pipeline path. No turbulence is generated in the oxidation chamber. Therefore, the utility model not only does not affect the conveying of zinc oxide, but also promotes the conveying with the blowing airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0012] Figure 1 It is a structural principle diagram of an embodiment of the utility model;

[0013] Figure 2 yes Figure 1 Schematic diagram of the enlarged AA structure;

[0014] Figure 3 yes Figure 2 An enlarged schematic diagram of the middle oxygen-assisting connection structure;

[0015] Figure 4 It is the structural principle diagram of the existing zinc oxide production system;

[0016] Figure 5 yes Figure 4 Schematic diagram of the BB structure enlargement;

[0017] Figure 6 yes Figure 5 Schematic diagram of CC structure.

[0018] In the figure: 11-oxidation chamber; 12-melting crucible; 13-evaporation crucible; 14-upper nozzle; 15-gas delivery pipeline; 16-bag collection device; 2-oxygen-assisting installation pipe; 3-oxygen-assisting air duct; 31-air duct fixing structure; 4-air distribution duct; 5-high-pressure fan; 6-oxygen-assisting connection structure; 61-flexible connecting pipe; 62-connecting nut; 63-sealing protrusion; 64-pressing step. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0020] like Figures 1 to 4 As shown in the figure, the high-pressure oxygen-assisting device is arranged at the oxidation chamber 11, the bottom of the oxidation chamber 11 is provided with an evaporation crucible 13, the top of the oxidation chamber 11 is connected with a gas delivery pipe 15, the zinc liquid is heated at high temperature in the evaporation crucible 13, so that the zinc liquid is converted into pressurized zinc vapor and sprayed into the oxidation chamber 11 from the upper nozzle 14 of the evaporation crucible 13, and the zinc oxide particles generated by the oxidation reaction of the zinc vapor are guided from the gas delivery pipe 15 to the bag collection device 16 for collection. The above structural principle is well known and will not be repeated here.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown together, the device includes an oxygen-assisting installation tube 2 which is installed through the wall of the oxidation chamber 11 and corresponds to the evaporation crucible 13 one by one, and the oxygen-assisting installation tube 2 is arranged below the upper nozzle 14 of the corresponding evaporation crucible 13; an oxygen-assisting air duct 3 is installed through the oxygen-assisting installation tube 2, and the inner end of the oxygen-assisting air duct 3 is arranged to spray obliquely above the upper nozzle 14; an air distribution duct 4 is installed outside the oxidation chamber 11, and an oxygen-assisting connection structure 6 is respectively provided between the air distribution duct 4 and the outer end of each of the oxygen-assisting air ducts 3; the air distribution duct 4 is connected to a high-pressure fan 5.

[0022] The high-pressure blower 5 converts the air at normal temperature and pressure into high-temperature and high-pressure air, and the high-temperature and high-pressure air is sprayed in a spot-beam manner above the upward nozzle 14 through the oxygen-assisting air duct 3, and oxygen can rush into the center of the jet-shaped zinc vapor, so that the inside and outside of the jet-shaped zinc vapor are in contact with oxygen, and the high temperature of the air does not affect the reaction temperature of the zinc vapor, and the zinc vapor is finally oxidized completely. The spot-beam spraying airflow has a small impact range and a clear direction, and the spraying direction is in accordance with the zinc vapor spray path and the path of the particles entering the air delivery pipe 15 upward, and no turbulence is generated in the oxidation chamber 11. Therefore, this embodiment not only does not affect the conveying of zinc oxide, but also promotes the conveying with the spraying airflow.

[0023] The high-pressure fan 5, also called a high-pressure blower, is a fan that can compress air to a pressure of more than 20 kPa. Affected by air compression and heat generation of moving parts, the output high-pressure air has a temperature of more than 200°C. The high-pressure fan 5 is a well-known technology, and its structural principle is not repeated here. This embodiment relies on a high-pressure fan 5 to generate high-temperature and high-pressure air, which can simplify the structural layout, eliminate the need for additional heating, and help reduce energy consumption.

[0024] The oxygen-assisting connection structure 6 includes a flexible connection tube 61 installed on the air distribution pipe 4, a connection thread is provided on the outer end of the oxygen-assisting air duct 3, a connection nut 62 for installation on the connection thread is provided on the flexible connection tube 61, a sealing protrusion 63 is provided at the end of the flexible connection tube 61 connected to the oxygen-assisting air duct 3, and a pressing step 64 for pressing the sealing protrusion 63 is provided on the inner wall of the connection nut 62 located away from the sealing protrusion 63 of the oxygen-assisting air duct 3. The connection nut 62 is installed on the connection thread, and the sealing protrusion 63 is pressed against the outer end surface of the oxygen-assisting air duct 3 to form a pipeline connection. This detachable connection method and the flexible characteristics of the flexible connection tube 61 also facilitate replacement and maintenance after the oxygen-assisting air duct 3 is ablated. Of course, the connection between the flexible connection tube 61 and the air distribution pipe 4 can also adopt this structure; based on this, the flexible connection tube 61 can be implemented by using an existing metal braided hose.

[0025] Preferably, an air duct fixing structure 31 is provided between the oxygen-assisting air duct 3 and the corresponding oxygen-assisting mounting tube 2 to ensure that the inner end of the oxygen-assisting air duct 3 is in the correct posture for spraying above the upward nozzle 14. The air duct fixing structure 31 can be implemented by radial bolts installed on the oxygen-assisting mounting tube 2, which can be easily obtained by those skilled in the art in combination with conventional technical means and will not be described in detail here.

[0026] The oxygen-assisting installation pipe 2 is arranged at a side of the corresponding evaporation crucible 13 away from the gas delivery pipe 15, and the inner end of the oxygen-assisting air duct 3 is also arranged to spray obliquely toward the gas delivery pipe 15. In this way, the oxygen-assisting air duct 3 is more compliant with the zinc vapor injection and the upward guidance of particulate matter in the oxidation chamber 11, forming a better guidance and promotion effect. Based on the arrangement of four rectangular evaporation crucibles 13 in the oxidation chamber 11, the four oxygen-assisting air ducts 3 form a converging spray, and the wind force forms a common upward blowing airflow at the position between the four evaporation crucibles 13, further promoting the formation of a good airflow guidance environment in the oxidation chamber 11.

[0027] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-pressure oxygen-assisting device is arranged at an oxidation chamber, an evaporation crucible is arranged at the bottom of the oxidation chamber, and a gas delivery pipeline is connected to the top of the oxidation chamber, characterized in that: It comprises an oxygen-assisting installation tube which is installed through the wall of the oxidation chamber and corresponds to the evaporation crucible one by one, wherein the oxygen-assisting installation tube is arranged below the upper nozzle of the corresponding evaporation crucible; an oxygen-assisting air duct is installed through the oxygen-assisting installation tube, and the inner end of the oxygen-assisting air duct is arranged to spray obliquely above the upper nozzle; an air distribution duct is installed outside the oxidation chamber, and an oxygen-assisting connection structure is respectively arranged between the air distribution duct and the outer end of each of the oxygen-assisting air ducts; the air distribution duct is connected to a high-pressure blower.

2. The high-pressure oxygen-assisting device according to claim 1, characterized in that: The oxygen-assisting installation pipe is arranged at a side of the evaporating crucible away from the gas delivery pipeline, and the inner end of the oxygen-assisting air duct is arranged to spray obliquely toward the gas delivery pipeline.

3. The high-pressure oxygen-assisting device according to claim 1, characterized in that: The oxygen-assisting connection structure includes a flexible connecting tube installed on the air distribution duct, a connecting thread is provided on the outer end of the oxygen-assisting air duct, a connecting nut for being installed on the connecting thread is provided on the flexible connecting tube, a sealing protrusion is provided at the end of the flexible connecting tube connected to the oxygen-assisting air duct, and a pressing step for pressing the sealing protrusion is provided on the inner wall of the connecting nut located away from the sealing protrusion of the oxygen-assisting air duct.

4. The high-pressure oxygen-assisting device according to claim 1, characterized in that: An air duct fixing structure is provided between the oxygen-assisting air duct and the corresponding oxygen-assisting installation pipe.

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