Gas-solid two-phase secondary combustion device based on aerosol coal saving agent
The gas-solid two-phase secondary combustion device using aerosol coal-saving agent utilizes a spiral guide vane and atomizing nozzle design to promote the secondary combustion of unburned gases, solving the problem of incomplete combustion in the gas phase reaction and achieving efficient combustion and emission reduction effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2026-03-27
AI Technical Summary
Existing coal-saving technologies have failed to effectively catalyze gas-phase reactions, resulting in a large amount of unburned gases such as CO, H2, and CH4 being discharged with the flue gas, causing environmental pollution.
The gas-solid two-phase secondary combustion device using aerosol coal-saving agent utilizes a spiral guide vane and atomizing nozzle design to carry out secondary combustion through the catalytic body inside the sleeve, promoting further combustion of unburned gases, and using nano-sized cerium oxide as the catalyst.
It significantly improves combustion efficiency, reduces the emission of unburned gases, reduces environmental pollution, increases the utilization rate of coal-saving agents, and has a compact structure that is easy to maintain.
Smart Images
Figure CN224050392U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to flue gas emission and coal-saving agent auxiliary combustion technical field, concretely relates to a kind of gas-solid two-phase secondary combustion device based on aerosol coal-saving agent. BACKGROUND
[0002] With the continuous improvement of global energy efficiency and environmental protection requirements, traditional coal combustion technology is facing severe challenges. Existing coal-saving technology mainly optimizes the primary combustion process of coal by adding catalysts (such as calcium oxide, nitrate, etc.) to the coal. However, in the traditional coal combustion process, about 10%-15% of combustible gases (such as carbon monoxide CO, hydrogen H2, methane CH4, etc.) are not completely combusted and are discharged with flue gas, causing great pollution to the environment. This phenomenon is due to the insufficient combustion conditions in the furnace to support the complete combustion of all generated combustible gases.
[0003] At the same time, most of the coal-saving agents on the market only optimize the combustion stage of solid fuel and lack effective secondary catalytic means for combustible components that have entered the gaseous state. This means that even if the primary combustion process is optimized, a large amount of potential gas-phase fuel is not fully combusted.
[0004] Therefore, it is necessary to study a coal-saving agent auxiliary combustion device that addresses the problem of unburned gas pollution caused by the lack of gas-phase reaction, so that flue gas emission treatment reaches higher indicators. SUMMARY
[0005] To solve the above technical problems, the utility model provides a kind of gas-solid two-phase secondary combustion device based on aerosol coal-saving agent, to effectively reduce the environmental pollution caused by unburned gas in emission flue gas, significantly improve combustion efficiency, realize the goal of emission reduction.
[0006] To achieve the above purpose, the utility model adopts the following technical scheme:
[0007] A kind of gas-solid two-phase secondary combustion device based on aerosol coal-saving agent,
[0008] Including sleeve, the sleeve is equipped with catalytic main body in sleeve;
[0009] The catalytic main body includes a center cylinder fixedly installed in the sleeve with the center axis coinciding, the outer side wall of the center cylinder is provided with spiral guide vane, the spiral guide vane and the inner wall of the sleeve form spiral guide channel, and the spiral guide channel is used for discharging flue gas;
[0010] The side wall of the center cylinder is provided with a spiral injection port group along the guide direction of the spiral guide channel, the center cylinder is communicated with a feed pipe, and the feed pipe is used to supply aerosol coal-saving agent ejected out of the spiral injection port group.
[0011] As preferred, the spiral injection port group comprises a plurality of injection holes arranged in a spiral manner, and each of the injection holes is provided with a corresponding atomizing nozzle.
[0012] As preferred, the lower end of the central cylinder is connected with the feeding pipe through a flow guide elbow;
[0013] As preferred, the flow guide elbow is fixed at the bottom of the sleeve through a lower mounting base, and the lower end of the central cylinder is provided with a lower flange plate matched with the flow guide elbow.
[0014] As preferred, the top of the central cylinder is fixedly installed at the upper end of the sleeve through an upper mounting base;
[0015] The upper mounting base comprises an upper mounting disc and a blocking sleeve head arranged at the upper end of the central cylinder, and the upper mounting disc and the blocking sleeve head are connected and fixed through a plurality of upper connecting rods.
[0016] As preferred, the lower mounting base and the flow guide elbow are integrally arranged.
[0017] As preferred, the lower mounting base comprises a lower mounting disc and a lower connecting rod used for connecting the lower mounting disc with the flow guide elbow;
[0018] The lower mounting disc is provided with a lining ring fixed to the inner side wall of the bottom of the sleeve through a threaded fixing assembly.
[0019] As preferred, one end of the feeding pipe is fixed to the side wall of the bottom of the sleeve and is sealingly connected and fixed with the flow guide elbow through the sleeve.
[0020] The utility model includes but is not limited to the following beneficial effects:
[0021] The utility model sets up the secondary combustion area after traditional primary combustion, utilizes coal-saving agent (such as nanometer cerium oxide) as catalyst, effectively promotes the further combustion of unburnt combustible gas (such as CO, H2, CH4 etc.), which not only improves the overall combustion efficiency, but also reduces the environmental pollution caused by the direct emission of these gases into the atmosphere.
[0022] The utility model adopts the design that the spiral flow guide piece is combined with the atomizing nozzle, makes that aerosol coal-saving agent can evenly disperse in the cyclone flue gas, increases the contact area of coal-saving agent and flue gas, thereby improves the utilization rate and catalytic effect of coal-saving agent.
[0023] The utility model adopts modular design, such as central cylinder and its connecting components, including upper mounting base, lower mounting base and flange plate sealing connection structure, which not only ensures the stability of the equipment, but also facilitates disassembly, maintenance or replacement of parts. BRIEF DESCRIPTION OF DRAWINGS
[0024] Fig. 1 It is the whole external structure schematic view of the utility model;
[0025] Fig. 2 It is the whole split structure schematic view of the utility model.
[0026] The reference signs involved in the drawing are:
[0027] 100, sleeve; 200, catalytic main body; 210, center cylinder; 220, spiral guide vane; 230, spiral injection port group; 240, lower flange plate; 300, upper mounting seat; 310, upper connecting rod; 320, plugging sleeve head; 400, feeding pipe; 500, flow guide elbow; 510, lower mounting disc. DETAILED DESCRIPTION
[0028] In order to make the skilled in the art can better understand the utility model, the following combining with the drawings and examples further explains the utility model technical scheme.
[0029] Figs. 1-2 A kind of gas-solid two-phase secondary combustion device based on aerosol coal-saving agent is shown, including sleeve 100, the catalytic main body 200 is sleeved in the sleeve 100;
[0030] The catalytic main body 200 includes center axis coincident fixed installation in the sleeve 100 center cylinder 210, the outer side wall of the center cylinder 210 is provided with spiral guide vane 220, the spiral guide vane 220 and the sleeve 100 inner wall form spiral guide flow channel, the spiral guide flow channel is used to discharge flue gas;
[0031] The side wall of the center cylinder 210 is provided with spiral injection port group 230 along the guide direction of the spiral guide flow channel, the center cylinder 210 is communicated with feeding pipe 400, the feeding pipe 400 is used to supply the aerosol coal-saving agent that is ejected out by the spiral injection port group 230, the aerosol coal-saving agent can be nanometer cerium oxide (CeO2, particle size 50nm) loaded on silica aerogel carrier (20%).
[0032] The spiral injection port group 230 includes several spiral distribution injection holes, corresponding atomizing nozzles are installed in the injection holes.
[0033] Because the first combustion of coal in furnace is typical ordinary combustion process, releases heat and generates CO2, H2O and other products, but also can produce CO and unburned hydrocarbons due to incomplete combustion. In the application, "secondary combustion" is not direct combustion in the ordinary sense, but a directional catalytic oxidation process for unburned combustible gas generated by first combustion.
[0034] The device can be fitted in the flue, and can be connected with the flue (if connected, it can be fixed by flange sealing connection). The device drives the cyclone by using the kinetic energy of the flue gas, and is assisted by the aero gel coal saving agent sprayed by the spiral jet port group 230 to promote the cyclone. The cyclone combined with the atomization design greatly improves the coverage rate of the aerosol, thereby greatly improving the utilization rate of the coal saving agent, optimizing the gas phase (flue gas) combustion in the coal combustion process, and further reducing the emission of unburned gas to achieve the goal of energy saving and emission reduction.
[0035] The working principle and process of the device are as follows:
[0036] Step 1: Aerosol preparation: Mix nano cerium oxide / silicon dioxide composite powder (mass ratio 1:4) with solvent, ultrasonic dispersion for 30 min to form stable aerosol, inject into storage tank and pressurize to 0.3-0.5 MPa.
[0037] Step 2: Flue gas cyclone mixing: High-temperature flue gas (600-800℃) enters the flue from the furnace, is guided by the spiral guide vane 220 to form a high-speed cyclone (flow rate 8-12 m / s), and the cyclone center negative pressure area enhances the adsorption of the aerosol coal saving agent.
[0038] Step 3: Aerosol injection and reaction: Open the storage tank valve, and the aerosol enters the injection tower under the action of pressure, accelerates through the spiral guide channel, and is sprayed from the atomizing nozzle (atomizing particle size ≤10 μm), and fully mixes with the cyclone flue gas. The nano CeO2 catalyzes the secondary combustion of unburned gas, and the specific reactions include but are not limited to the following:
[0039] .
[0040] The mounting mode of the center cylinder 210 can be specifically as follows: the lower end of the center cylinder 210 is connected with the feeding pipe 400 through the guide elbow 500; the guide elbow 500 is fixed on the bottom of the sleeve 100 through the lower mounting seat, and the lower end of the center cylinder 210 is provided with the lower flange plate 240 matched and connected with the guide elbow 500.
[0041] The top of the center cylinder 210 is fixedly installed on the upper end of the sleeve 100 through the upper mounting seat 300; the upper mounting seat 300 includes an upper mounting disc and a plugging sleeve head 320 arranged on the upper end of the center cylinder 210, and the upper mounting disc and the plugging sleeve head 320 are connected and fixed through a plurality of upper connecting rods 310.
[0042] In another preferred embodiment, the lower mounting seat and the guide elbow 500 are integrally arranged. The specific structure is as follows: the lower mounting seat includes a lower mounting disc 510 and a lower connecting rod integrally formed for connecting the lower mounting disc 510 and the guide elbow 500;
[0043] In order to detachably fix the lower mounting disc 510, the lower mounting disc 510 is provided with a lining ring fixed to the inner side wall of the bottom of the sleeve 100 through a threaded fixing assembly.
[0044] One end of the feed pipe 400 is fixed to the side wall of the bottom of the sleeve 100 and penetrates through the sleeve 100 and is sealingly connected and fixed with the flow guide elbow 500 through a flange plate, and the other end of the feed pipe 400 is connected with the outlet of the aerosol coal-saving agent storage tank.
[0045] In summary, the device includes a sleeve 100 and a catalytic body 200 fitted therein, which is composed of a central cylinder 210 and helical flow guide fins 220 on the outer side wall, forming a helical flow guide channel for flue gas discharge. The central cylinder 210 is provided with a spiral injection port group 230 connected with the feed pipe 400 for supplying aerosol coal-saving agent. The cyclone design combined with the atomizing injection design enhances the aerosol coverage, so that the aerosol coal-saving agent is fully mixed with high-temperature flue gas, promoting the secondary combustion of unburned combustible gas generated after primary combustion. This device not only improves the utilization rate of coal-saving agent, but also optimizes the gas phase combustion process, significantly reduces the emission of pollutants such as CO and CH4, and achieves the goal of energy saving and emission reduction. The device has compact structure and is convenient to install and maintain, and is suitable for various industrial application scenarios, providing a new solution to the environmental problems existing in the current coal combustion process.
[0046] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0047] In the specification, the terms "upper", "lower", "outer side", "inner side" and the like in the description and claims and the above drawings, if any, are used to distinguish the relative position, and do not have to be given a nature. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.
[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A gas-solid two-phase secondary combustion device based on aerosol coal-saving agent, characterized in that: Includes a sleeve, wherein a catalyst body is fitted inside the sleeve; The catalyst body includes a central cylinder that is fixedly installed inside the sleeve with its central axis coincident. A spiral guide vane is provided on the outer wall of the central cylinder. The spiral guide vane and the inner wall of the sleeve form a spiral guide channel for discharging flue gas. The central cylinder sidewall is provided with a spiral injection nozzle group along the flow direction of the spiral guide channel. The central cylinder is connected to the feed pipe, which is used to supply the aerosol coal-saving agent injected through the spiral injection nozzle group.
2. The gas-solid two-phase secondary combustion device based on aerosol coal-saving agent as described in claim 1, characterized in that: The spiral jet nozzle assembly includes several jet holes distributed in a spiral shape, and each jet hole is equipped with a corresponding atomizing nozzle.
3. The gas-solid two-phase secondary combustion device based on aerosol coal-saving agent as described in claim 1, characterized in that: The lower end of the central cylinder is connected to the feed pipe via a guide bend.
4. The gas-solid two-phase secondary combustion device based on aerosol coal-saving agent as described in claim 3, characterized in that: The flow guide bend is fixed to the bottom of the sleeve by a lower mounting base, and the lower end of the central cylinder is provided with a lower flange that is connected to the flow guide bend.
5. The gas-solid two-phase secondary combustion device based on aerosol coal-saving agent as described in claim 4, characterized in that: The top of the central cylinder is fixedly mounted on the upper end of the sleeve via an upper mounting base; The upper mounting base includes an upper mounting plate and a sealing sleeve disposed at the upper end of the central cylinder. The upper mounting plate and the sealing sleeve are connected and fixed by multiple upper connecting rods.
6. The gas-solid two-phase secondary combustion device based on aerosol coal-saving agent as described in claim 4, characterized in that: The lower mounting base and the guide bend are integrated into one unit.
7. The gas-solid two-phase secondary combustion device based on aerosol coal-saving agent as described in claim 6, characterized in that: The lower mounting base includes a lower mounting plate and a lower connecting rod for connecting the lower mounting plate to the guide bend; The lower mounting plate is provided with a bushing, which is fixed to the inner side wall of the bottom of the sleeve by a threaded fixing assembly.
8. The gas-solid two-phase secondary combustion device based on aerosol coal-saving agent as described in any one of claims 3 to 7, characterized in that: One end of the feed pipe is fixed to the bottom side wall of the sleeve, and passes through the sleeve to be sealed and fixed to the guide bend.