Dry quenching coke powder solid waste treatment system
By spraying the coke powder collected from the dry coke quenching device into the circulating fluidized bed boiler to burn, the problem of difficulty in utilization of coke powder and polluting the environment is solved, and the resource utilization and economic benefits of coke powder are improved.
Patent Information
- Application Number
- CN202411525109.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2024-12-13
AI Technical Summary
The tiny granular coke powder produced in existing dry coke quenching devices is difficult to utilize, it is easy to pollute the environment and has poor economic benefits, and more effective treatment and utilization methods need to be explored.
Design a solid waste treatment system for dry quenching coke powder. Through pneumatic conveying pipes and blowing devices, the coke powder collected by the dust removal equipment is sprayed into the furnace of the circulating fluidized bed boiler for combustion, combining the dry quenching device and circulation Fluidized bed boiler realizes resource utilization of coke powder.
It reduces the possibility of polluting the environment and the cost of waste slag disposal during coke powder transportation. At the same time, it generates power through coke powder combustion, brings economic benefits, and uses the burned fine ash as building materials to create value.
Smart Images
Figure CN119120044A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of dry quenching coke powder solid waste treatment, and in particular to a dry quenching coke powder solid waste treatment system. Background Art
[0002] The dry coke quenching device uses cold inert gas (usually nitrogen, with a temperature of about 150°C) to exchange heat with high-temperature coke (temperature of about 950-1050°C) in the dry quenching furnace, thereby cooling the coke to about 200°C. The inert gas that absorbs the heat of the coke then transfers the heat to the dry coke quenching boiler to generate steam. After the coke is cooled, dust is produced, which is dry coke powder. This coke powder has a gray-black appearance, and the particle diameter is usually no more than 3mm. It has a certain adsorption capacity and chemical reaction activity. Therefore, dust removal equipment is usually installed in the dry coke quenching device for dust removal.
[0003] In the prior art, a large number of tiny coke powder particles are captured by dust removal equipment. However, due to their small size, they cannot be used in blast furnace ironmaking and are prone to polluting the environment during transportation. As building materials, they are cheap and have poor economic benefits. Therefore, in order to achieve the rational use of coke powder and reduce environmental pollution, it is necessary to comprehensively consider factors such as the characteristics of coke powder, market demand, and environmental protection requirements, and explore more effective treatment and utilization methods. Summary of the invention
[0004] The object of the present invention is to provide a dry quenching coke powder solid waste treatment system to solve the problems mentioned in the above background technology.
[0005] In order to solve the above technical problems, the present invention provides a dry quenching coke powder solid waste treatment system, which includes a dry quenching coke device, in which a dust removal device is provided, and the coke powder outlet of the dust removal device is connected to the furnace of a circulating fluidized bed boiler through a pneumatic conveying pipeline, and a blowing device is provided on the pneumatic conveying pipeline, and the blowing device is used to blow the coke powder collected by the dust removal device into the furnace of the circulating fluidized bed boiler.
[0006] Furthermore, the dust removal equipment includes a primary dust collector and a secondary dust collector, and the dry quenching device includes a circulation pipeline and a dry quenching furnace, the primary dust collector, a waste heat boiler and the secondary dust collector which are sequentially arranged on the circulation pipeline.
[0007] Furthermore, the dry coke quenching device also includes a coke powder collecting device, the coke powder inlet of the coke powder collecting device is respectively connected to the coke powder outlets of the primary dust collector and the secondary dust collector, and the coke powder outlet of the coke powder collecting device is connected to the coke powder inlet of the injection device.
[0008] Furthermore, the coke powder collection device is a ground dust removal station.
[0009] Furthermore, the blowing device is a high-pressure blower.
[0010] Furthermore, the outlet of the pneumatic conveying pipeline is communicated with the dense phase zone of the furnace of the circulating fluidized bed boiler.
[0011] The beneficial effects of the present invention are as follows: the present invention couples the dry coke quenching device and the circulating fluidized bed boiler together through the blowing device and the pneumatic conveying pipeline, and the coke powder collected by the dry coke quenching device is sent to the circulating fluidized bed boiler as fuel for combustion, thereby realizing the resource utilization of the coke powder, reducing the possibility of coke powder leakage and environmental pollution during the transportation of waste slag and the cost of waste slag disposal, and at the same time, the combustion of coke powder as fuel for power generation can bring additional economic benefits to the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.
[0013] Among them: 1. Coke dry quenching device; 2. Circulating fluidized bed boiler; 3. Pneumatic conveying pipeline; 4. Injection device; 5. Coke powder collection device;
[0014] 11. CDQ furnace; 12. Primary dust collector; 13. Waste heat boiler; 14. Secondary dust collector. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiment is only one embodiment of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.
[0016] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0017] In the following description, references to "one embodiment", "an embodiment", "an example", "an example", etc. indicate that the embodiment or example described in this way may include specific features, structures, characteristics, properties, elements or limitations, but not every embodiment or example necessarily includes the specific features, structures, characteristics, properties, elements or limitations. In addition, repeated use of the phrase "according to one embodiment of the present application" may refer to the same embodiment, but does not necessarily refer to the same embodiment.
[0018] like Figure 1As shown, the present invention discloses a coke dry quenching coke powder solid waste treatment system, which includes a coke dry quenching device 1, in which a dust removal device is provided, and the coke powder outlet of the dust removal device is connected to the furnace of a circulating fluidized bed boiler 2 through a pneumatic conveying pipeline 3, and a blowing device 4 is provided on the pneumatic conveying pipeline 3, and the blowing device 4 is used to blow the coke powder collected by the dust removal device into the furnace of the circulating fluidized bed boiler 2. That is, the outlet of the pneumatic conveying pipeline 3 is connected to the furnace of the circulating fluidized bed boiler 2, and the inlet of the pneumatic conveying pipeline 3 is connected to the coke powder outlet of the dust removal device.
[0019] A large amount of tiny coke powder particles captured by the dust removal device in the dry quenching device 1 during the dry quenching process enter the well-sealed pneumatic conveying pipe 3 through the coke powder outlet of the dust removal device, and then are blown into the furnace of the circulating fluidized bed through the blowing device 4 on the pneumatic conveying pipe 3 to be burned as fuel, thereby reducing the problem of dust leakage and environmental pollution during the coke powder transportation process.
[0020] At the same time, the flue gas outlet of the circulating fluidized bed boiler 2 is connected to the drum through the main steam pipeline, and the drum outlet is connected to the steam turbine and the generator in turn through the pipeline to generate electricity. That is, the tiny coke powder particles generated by the dry coke quenching device 1 during the dry coke quenching process can be used as fuel for combustion and power generation, thereby improving the economy of the system. And the fine ash generated after combustion can be used as a building material, further creating value.
[0021] The present invention couples the dry coke quenching device 1 and the circulating fluidized bed boiler 2 together through the blowing device 4 and the pneumatic conveying pipeline 3, and sends the coke powder collected by the dry coke quenching device 1 into the circulating fluidized bed boiler 2 as fuel for combustion, thereby realizing the resource utilization of the coke powder, reducing the possibility of coke powder leakage and environmental pollution during the transportation of waste slag and the cost of waste slag disposal, and burning the coke powder as fuel for power generation can bring additional economic benefits to the enterprise.
[0022] In one embodiment, the dust removal equipment includes a primary dust collector 12 and a secondary dust collector 14, and the dry quenching device 1 includes a circulation pipeline and a dry quenching furnace 11, a primary dust collector 12, a waste heat boiler 13 and a secondary dust collector 14 arranged in sequence on the circulation pipeline.
[0023] The circulating gas in the CDQ furnace 11 enters the primary dust collector 12 through the circulation pipeline for preliminary dust removal, and then enters the waste heat boiler 13 for waste heat recovery. After cooling in the waste heat boiler 13, the circulating gas enters the secondary dust collector 14 for further dust removal. After the secondary dust removal, the circulating gas re-enters the CDQ furnace 11 to start a new cycle. The tiny coke powder particles in the circulating gas collected by the primary dust collector 12 and the secondary dust collector 14 enter the injection device 4 through the pneumatic conveying pipeline 3, and the coke powder is injected into the furnace of the circulating fluidized bed as fuel for combustion.
[0024] In one embodiment, the dry coke quenching device 1 further includes a coke powder collecting device 5, the coke powder inlet of the coke powder collecting device 5 is respectively connected to the coke powder outlets of the primary dust collector 12 and the secondary dust collector 14, and the coke powder outlet of the coke powder collecting device 5 is connected to the coke powder inlet of the injection device 4.
[0025] The coke powder collected by the primary dust collector 12 and the secondary dust collector 14 are both sent to the coke powder collecting device 5 to facilitate the recovery of the coke powder. When the coke powder in the coke powder collecting device 5 accumulates to a certain amount, it is transported to the injection device 4 through the coke powder outlet.
[0026] In one embodiment, the coke powder collection device 5 is a ground dust removal station. The ground dust removal station generally uses a PLC electronic automation control system, including a motor, a fan, a dust collection main pipe, a bag filter or an electrostatic precipitator and other dust collectors to uniformly recycle the coke powder for reuse.
[0027] In one embodiment, the injection device 4 is a high-pressure blower, which is used to inject the coke powder into the furnace of the circulating fluidized bed boiler 2 in the form of high-pressure airflow. The high-pressure blower has a simple and compact structure, is easy to install, and is easy to maintain.
[0028] In one embodiment, the outlet of the pneumatic conveying pipe 3 is connected to the dense phase area of the furnace of the circulating fluidized bed boiler 2. The furnace of the circulating fluidized bed boiler 2 has a dense phase area and a dilute phase area connected to each other, and the dilute phase area is located above the dense phase area.
[0029] The concentration of solid particles in the dilute phase is low, and there are fewer collisions between particles, but they still participate in the combustion process of the fuel, which helps the complete combustion of the fuel. The concentration of solid particles in the dense phase is high, and the collisions and frictions between particles are more frequent. It is the main area for combustion and mass transfer. Coke powder enters the dense phase area and decomposes and burns as the main fuel, providing sufficient surface area and reaction time, which helps the efficient combustion of coke powder.
[0030] The design ideas of the present invention are as follows:
[0031] In this embodiment, the coke dry quenching device 1 includes a circulation pipeline and a dry quenching furnace 11, a primary dust collector 12, a waste heat boiler 13 and a secondary dust collector 14 arranged in sequence on the circulation pipeline. The blowing device 4 is a high-pressure blower, and the coke powder collecting device 5 is a ground dust removal station.
[0032] The circulating gas in the dry quenching furnace 11 enters the primary dust collector 12 through the circulation pipeline for preliminary dust removal, and then enters the waste heat boiler 13 for waste heat recovery. After cooling in the waste heat boiler 13, the circulating gas enters the secondary dust collector 14 for further dust removal. After the secondary dust removal, the circulating gas re-enters the dry quenching furnace 11 to start a new cycle. The tiny coke particles in the circulating gas collected by the primary dust collector 12 and the secondary dust collector 14 are all collected together in the ground dust removal station, and are blown into the dense phase area of the circulating fluidized bed furnace by the high-speed airflow of the high-pressure fan through the well-sealed pneumatic conveying pipeline 3 as fuel for combustion, which can generate electricity while processing solid dust coke particles.
[0033] The present invention couples the dry coke quenching device 1 and the circulating fluidized bed boiler 2 together through the blowing device 4 and the pneumatic conveying pipeline 3, and sends the coke powder collected by the dry coke quenching device 1 into the circulating fluidized bed boiler 2 as fuel for combustion, thereby realizing the resource utilization of the coke powder, reducing the possibility of coke powder leakage and environmental pollution during the transportation of waste slag and the cost of waste slag disposal, and burning the coke powder as fuel for power generation can bring additional economic benefits to the enterprise.
[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A coke dry quenching coke powder solid waste treatment system, comprising a coke dry quenching device, wherein the coke dry quenching device is provided with a dust removal device, characterized in that: The coke powder outlet of the dust removal equipment is connected to the furnace of the circulating fluidized bed boiler through a pneumatic conveying pipeline. The pneumatic conveying pipeline is provided with a blowing device, which is used to blow the coke powder collected by the dust removal equipment into the furnace of the circulating fluidized bed boiler.
2. A CDQ coke powder solid waste treatment system according to claim 1, characterized in that: The dust removal equipment includes a primary dust collector and a secondary dust collector, and the dry coke quenching device includes a circulation pipeline and a dry quenching furnace, the primary dust collector, a waste heat boiler and the secondary dust collector which are sequentially arranged on the circulation pipeline.
3. A CDQ coke powder solid waste treatment system according to claim 2, characterized in that: The dry coke quenching device also includes a coke powder collecting device, the coke powder inlet of the coke powder collecting device is respectively connected to the coke powder outlets of the primary dust collector and the secondary dust collector, and the coke powder outlet of the coke powder collecting device is connected to the coke powder inlet of the injection device.
4. A CDQ coke powder solid waste treatment system according to claim 3, characterized in that: The coke powder collection device is a ground dust removal station.
5. A CDQ coke powder solid waste treatment system according to claim 1, characterized in that: The blowing device is a high-pressure blower.
6. A CDQ coke powder solid waste treatment system according to claim 1, characterized in that: The outlet of the pneumatic conveying pipeline is communicated with the dense phase area of the furnace of the circulating fluidized bed boiler.