Air preheater ash removal device for carbon black production
By setting up corundum pipes and solenoid valves in the air preheater, the carbon black dust is cleaned with inert gas, and the heat exchange efficiency and coking problems caused by the adhesion of carbon black dust are solved, and efficient dredging and energy saving and consumption reduction are achieved.
Patent Information
- Application Number
- CN202421995208.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-17
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-08-17
AI Technical Summary
The adhesion of carbon black dust in the heat exchange tube of the air preheater leads to a decrease in heat exchange efficiency, and some carbon black cokes at high temperatures, increasing the difficulty of dredging and affecting production costs and subsequent processes.
A corundum tube is installed inside the air preheater, and a solenoid valve and an air flow aid are connected. Inert gas such as nitrogen are used for cleaning, combined with an injector and a special nozzle to achieve automatic ash cleaning and avoid carbon black coking.
The heat exchange efficiency of the heat exchange pipe is improved, the risk of carbon black coking at high temperatures is reduced, preventive dredging is achieved, and production costs and energy consumption are reduced.
Smart Images
Figure CN223295313U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of carbon black production preheater dust cleaning, in particular to an air preheater dust cleaning device for carbon black production. Background Art
[0002] Carbon black flue gas is a mixture of reaction gases and carbon black before the carbon black is collected during the carbon black production process. It primarily contains carbon black, carbon monoxide, carbon dioxide, water vapor, and other reaction gases. During carbon black production, fuel oil and air are burned to produce a high-temperature combustion gas stream reaching approximately 2100°C. This high-speed stream then enters the throat section of the reactor, where the feedstock oil rapidly vaporizes and cracks to produce carbon black. During the carbon black production process, carbon black dust, due to its strong adsorption properties, can adhere to the heat exchange tubes of the air preheater due to the carbon black flue gas's strong adsorption properties. This can reduce heat transfer efficiency by 20-35% in severe cases, significantly impacting production costs and hindering subsequent processes. Numerous measures have been adopted to address this issue, including the use of adhesives and carbon black particles for dredging during production, but these efforts have been ineffective. Once carbon black adsorbs on the heat exchange tubes, some of the carbon black forms coke under the high temperatures, making dredging more difficult and ineffective.
[0003] Therefore, it is necessary to propose a technology to improve the above defects. Utility Model Content
[0004] In view of the above-mentioned deficiencies and defects of the prior art air preheater ash cleaning device, in order to achieve the above-mentioned purpose, the utility model provides an air preheater ash cleaning device for carbon black production, comprising:
[0005] An air preheater is provided with a corundum tube inside the air preheater, and the corundum tubes are arranged in a ring shape. A solenoid valve is installed at the front end of the air inlet of the air preheater, and an air flow aid is provided at the other end of the solenoid valve.
[0006] As a preferred technical solution, the air preheater is connected to the solenoid valve via a pipe, and the other end of the solenoid valve is connected to the air flow aid via a pipe.
[0007] As a preferred technical solution, a nozzle is also included, one end of which is connected to the air inlet, and the other end is connected to the corundum tube.
[0008] As a preferred technical solution, an ejector is further provided at the tail of the corundum tube, and a special nozzle is provided at the other end of the ejector.
[0009] As described above, the utility model provides an air preheater dust cleaning device for carbon black production, which has the following beneficial effects:
[0010] The utility model arranges a corundum tube inside the air preheater, connects the solenoid valve to the outside of the corundum tube, and arranges an air flow aid at the other end of the solenoid valve, so as to clean the carbon black dust attached to the inside of the heat exchange tube, effectively improve the heat exchange efficiency of the heat exchange tube, and avoid the carbon black attached to the inside of the heat exchange tube from coking under high temperature, thereby realizing preventive dredging in the production process, replacing the post-processing after the shutdown due to pipe blockage, greatly improving the dredging effect of the heat exchange tube, and achieving the purpose of energy saving, consumption reduction, cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 Shown is a schematic structural diagram of the present utility model.
[0012] 1. Air preheater; 2. Corundum tube; 3. Air inlet; 4. Solenoid valve; 5. Air flow aid; 6. Ejector; 7. Special nozzle; 8. Nozzle. DETAILED DESCRIPTION
[0013] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.
[0014] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Although the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation, the form, quantity, positional relationship and proportion of each component in actual implementation can be changed at will under the premise of realizing the technical solution of this party, and the component layout form may also be more complicated. Example
[0015] This embodiment provides an air preheater cleaning device for carbon black production, Figure 1The device includes an air preheater 1, within which a corundum tube 2 is disposed. The corundum tube 2 is arranged in a ring shape. An air inlet 3 is provided at the front end of the air heat exchanger 1. A solenoid valve 4 is provided on the outside of the air inlet 3. The solenoid valve 4 is connected to the air inlet 3 of the air heat exchanger 1 via a pipe. An air flow aid 5 is provided on the other side of the solenoid valve 4. The air flow aid 5 is connected to the solenoid valve 4 via a pipe. Preferably, the gas used in the air flow aid 5 is an inert gas. In this embodiment, the inert gas is nitrogen. A nozzle 8 is also provided. The nozzle 8 is connected to the air inlet 3. The other end of the nozzle 8 is connected to the corundum tube 2. In addition, an ejector 6 is provided at the rear end of the corundum tube 2. A special nozzle 7 is installed on the outside of the ejector 6.
[0016] When the device is in use, air is pressurized by an external device and enters the air preheater 1, where it is preheated to a certain temperature for carbon black production. The nitrogen inside the air flow aid 5 enters the air inlet 3 of the air preheater 1 through the solenoid valve 4. The nitrogen entering the air inlet 3 enters the corundum tube 2 through the nozzle 8. The carbon black attached to the inside of the corundum tube is cleaned away by the nitrogen and is ejected through the ejector 6 and the special nozzle 7. The solenoid valve 4 can realize automatic vibration, reducing manual operation, and the injection interval time can be adjusted at any time according to production conditions.
[0017] To sum up, the utility model arranges a corundum tube inside the air preheater, connects the outside of the corundum tube to a solenoid valve, and arranges an air flow aid at the other end of the solenoid valve, so as to clean the carbon black dust attached to the inside of the heat exchange tube, effectively improve the heat exchange efficiency of the heat exchange tube, and avoid the carbon black attached to the inside of the heat exchange tube from coking under high temperature, thereby realizing preventive dredging in the production process, replacing the post-processing after the shutdown due to pipe blockage, greatly improving the dredging effect of the heat exchange tube, and achieving the purpose of energy saving, consumption reduction, cost reduction and efficiency improvement.
[0018] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.
Claims
1. A carbon black production air preheater dust cleaning device, comprising an air preheater, characterized in that: A corundum tube is provided inside the air preheater, and the corundum tubes are arranged in a ring shape. An air inlet is provided at one end of the air preheater, a solenoid valve is installed at the front end of the air inlet, and an air flow aid is provided at the other end of the solenoid valve.
2. The air preheater cleaning device for carbon black production according to claim 1, characterized in that: The air inlet is connected to the solenoid valve via a pipeline, and the other end of the solenoid valve is connected to the air flow aid via a pipeline.
3. The air preheater cleaning device for carbon black production according to claim 1, characterized in that: It also includes a nozzle, one end of which is connected to the air inlet, and the other end of which is connected to the corundum tube.
4. The air preheater cleaning device for carbon black production according to claim 1, characterized in that: An ejector is also provided at the tail of the corundum tube, and a special nozzle is provided at the other end of the ejector.