Desalting and dedusting heat energy recovery device for waste acid cracking process
By designing an automatic desalination, dust removal, and heat recovery device, the problem of scale formation in the waste heat boiler during the waste acid pyrolysis process was solved. This device achieves automatic desalination, dust removal, and heat recovery, improving safety and operational efficiency while reducing the need for manual cleaning.
Patent Information
- Application Number
- CN202423009797.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Existing technologies cannot effectively solve the scaling problem in waste heat boilers in waste acid pyrolysis processes, resulting in poor heat transfer, the need for frequent manual cleaning, and safety hazards. At the same time, the scale during cleaning can cause downstream catalyst blockage, increasing energy consumption.
An automatic desalination and dust removal heat energy recovery device is designed, comprising an incineration pyrolysis furnace, a dust removal and desalination heat energy recovery device, and a waste heat boiler. By setting up multiple burners, atomizing fans, and guide ridges, the flue gas can be efficiently desalinated and dusted in the dust removal device. After the flue gas temperature is reduced, it is returned to the incinerator for heat energy recovery.
Automatic desalination and dust removal of waste heat boilers have been achieved, eliminating the need for manual cleaning, reducing safety hazards, minimizing the risk of catalyst blockage, and recovering flue gas heat energy, thereby improving operational safety and efficiency.
Smart Images
Figure CN223677795U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to chemical process technical field, it is a kind of salt removal dust-removing heat energy recovery device for preventing the scale formation of waste acid cracking recovery process in waste heat boiler. BACKGROUND
[0002] Waste heat boiler is one of important equipment of waste acid cracking regenerator, and scale formation phenomenon of different process waste acid regenerator's waste heat boiler will appear due to different reasons.Waste heat boiler scale formation is mainly iron, sodium, chromium and nickel sulfate or oxide, which affects heat transfer effect, causes the temperature of middle and outlet of waste heat boiler to be too high, and waste heat boiler tube wall must be cleaned manually continuously, which consumes a lot of manpower and has safety hazard.Currently, main dust removal measures are as follows:1, additional acoustic wave dust blower, in view of the fact that dust is quite loose structure, acoustic wave dust blower is additionally arranged in middle cavity position of waste heat boiler, to further extend operation time cycle.2, adjust waste acid spray gun atomization effect, since waste heat boiler scale formation is formed by particles of different sizes, and particle is formed by waste acid droplet, therefore, it is possible that relatively rough, larger particle size waste acid atomization in incinerator forms larger particle, and the deposition tendency is lower.Therefore, waste acid atomization effect is adjusted to change particle size and scale formation tendency caused thereby.Both measures cannot completely solve waste heat boiler scale formation problem. CONTENT OF UTILITY MODEL
[0003] The utility model solves that waste heat boiler is prone to scale formation and dust accumulation in existing waste acid cracking process flow, manual online dust removal is needed, a lot of manpower is consumed, and safety hazard is increased.Meanwhile, manual blowing and dust removal make a lot of ash and scale material follow airflow to catalyst layer of downstream converter, cause converter catalytic blockage, increase bed layer pressure drop, affect catalyst efficiency and increase device energy consumption.
[0004] Air required in waste acid cracking treatment process is introduced into system by air blower, and the introduced air returns incineration cracking furnace as combustion-supporting air to participate in reaction after passing through salt removal dust-removing heat energy recovery device.
[0005] The utility model is realized through the following technical schemes:
[0006] An automatic salt removal dust-removing heat energy recovery device, the device includes incineration cracking furnace, dust-removing salt-removing heat energy recovery device and waste heat boiler, the flue gas output end of incineration cracking furnace is connected with the upper portion of dust-removing salt-removing heat energy recovery device, and the output end at the bottom of dust-removing salt-removing heat energy recovery device is connected with waste heat boiler;The output pipeline of air is connected with the bottom input end and the upper output pipeline of dust-removing salt-removing heat energy recovery device respectively.
[0007] In the technical scheme of the utility model, a plurality of burners are arranged on incineration cracking furnace.
[0008] The utility model discloses a technical scheme, is provided with 1-5 burners on the incineration cracking furnace.
[0009] The utility model discloses a technical scheme, the output pipeline of air is connected with two atomization fans, and the output end of one atomization fan is connected with the bottom of dust and salt removal heat energy recovery device, and the output end of another atomization fan is connected with the output end of the upper portion of salt heat energy recovery device.
[0010] The utility model discloses a technical scheme, and the output pipeline of the upper portion of salt heat energy recovery device is connected with incineration cracking furnace and burner respectively.
[0011] The utility model discloses a technical scheme, and the dust and salt removal heat energy recovery device is equipped with the flow guide ridge board, and the shell side tube wall is equipped with the spiral flow guide plate, and the lower end is equipped with the conical fixed collection cavity.
[0012] The utility model discloses a technical scheme, and the dust and salt removal heat energy recovery device's import pipe box is equipped with the semi-automation on-line ash removal device.
[0013] The utility model discloses a technical scheme, in waste acid cracking process, the flue gas that comes out from incineration cracking furnace first enters the dust and salt removal heat energy recovery device, and the high salt component in flue gas becomes solid and separates in advance, and the device carries out automatic ash removal, and does not need manual on-line ash removal. Flue gas is reduced to 500 DEG C-700 DEG C before entering the boiler, and the normal temperature air of the device is heated and then returns incineration cracking furnace, and the heat energy produced by flue gas reduction is recovered.
[0014] The utility model discloses a technical scheme, which fundamentally solves the problem of easy fouling and ash accumulation in the waste acid cracking process, and is convenient to operate and adjust. DRAWINGS
[0015] Figure 1 It is the process flow diagram of the dust and salt removal heat energy recovery of the utility model embodiment
[0016] In the drawing, 1-atomization fan;2-air regulating valve;3-dust and salt removal heat energy recovery device;4-incineration cracking furnace;5-burner;6-waste heat boiler. DETAILED DESCRIPTION
[0017] The utility model will be further explained below in combination with the drawings and embodiments.
[0018] Embodiment: the dust and salt removal heat energy recovery process flow of this embodiment is as shown in the attached Figure 1 Drawing.
[0019] The application discloses an automatic desalination and dust removal heat energy recovery device, which comprises a burning and cracking furnace 4, a desalination and dust removal heat energy recovery device 3 and a waste heat boiler 6, wherein the flue gas output end of the burning and cracking furnace 4 is connected with the upper portion of the desalination and dust removal heat energy recovery device 3, the output end at the bottom of the desalination and dust removal heat energy recovery device 3 is connected with the waste heat boiler 6, the output pipeline of air is connected with two atomizing fans 1, the output end of one of the atomizing fans 1 is connected with the bottom of the desalination and dust removal heat energy recovery device 3, and the output end of the other atomizing fan 1 is connected with the output end of the upper portion of the desalination and dust removal heat energy recovery device 3. Three burners 5 are arranged on the burning and cracking furnace 4. The output pipeline of the upper portion of the desalination and dust removal heat energy recovery device 3 is connected with the burning and cracking furnace 4 and the burners 5 respectively. The desalination and dust removal heat energy recovery device 3 is provided with a flow guide ridge plate, the shell side pipe wall is provided with a spiral flow guide plate, and the lower end is provided with a conical fixed collecting cavity. The inlet pipe box of the desalination and dust removal heat energy recovery device 3 is provided with a semi-automatic online ash removal device.
[0020] The working process is as follows: the high-salt-containing flue gas from the waste acid burning and cracking furnace enters the desalination and dust removal heat energy recovery device at a temperature of 1050 DEG C, and leaves at a temperature of 600 DEG C, the high-salt components and solid dust particles in the flue gas are precipitated in advance, and the device automatically removes ash. The 30 DEG C air introduced into the device is 700 DEG C when leaving the device, and is returned to the burning and cracking furnace, so that the heat energy is recovered.
[0021] As can be seen from the embodiment, the process flow can realize efficient desalination and dust removal before the high-salt-containing flue gas enters the waste heat boiler, so that the high-salt components and solid dust cannot accumulate in the waste heat boiler, the device does not need to be stopped, the operation is safe and convenient, and the heat energy generated by the reduction of the flue gas temperature is recycled and utilized.
Claims
1. A desalting and dedusting heat energy recovery device for a spent acid cracking process, characterized in that, The device comprises a burning and cracking furnace (4), a dust and salt removing and heat energy recovering device (3) and a waste heat boiler (6), the smoke output end of the burning and cracking furnace (4) is connected with the upper part of the dust and salt removing and heat energy recovering device (3), the output end of the bottom of the dust and salt removing and heat energy recovering device (3) is connected with the waste heat boiler (6); the air output pipeline is connected with the bottom input end and the upper output pipeline of the dust and salt removing and heat energy recovering device (3) respectively.
2. A desalting and dedusting heat energy recovery device for spent acid cleavage process according to claim 1, characterized in that, A plurality of burners (5) are arranged on the burning and cracking furnace (4).
3. The salt and dust removal heat energy recovery device for spent acid cleavage process according to claim 1, characterized in that, 1-5 burners (5) are arranged on the burning and cracking furnace (4).
4. The salt and dust removal heat energy recovery device for spent acid cleavage process according to claim 1, characterized in that, The air output pipeline is connected with two atomizing fans (1), the output end of one atomizing fan (1) is connected with the bottom of the dust and salt removing and heat energy recovering device (3), and the output end of the other atomizing fan (1) is connected with the upper output end of the dust and salt removing and heat energy recovering device (3).
5. The salt and dust removal heat energy recovery device for spent acid cleavage process according to claim 2, characterized in that, The upper output pipeline of the dust and salt removing and heat energy recovering device (3) is connected with the burning and cracking furnace (4) and the burners (5) respectively.
6. The salt and dust removal heat energy recovery device for spent acid cleavage process according to claim 1, characterized in that, The dust and salt removing and heat energy recovering device (3) is provided with a flow guide ridge plate, the shell side tube wall is provided with a spiral flow guide plate, and the lower end is provided with a conical fixed collecting cavity.
7. The salt and dust removal heat energy recovery device for spent acid cleavage process according to claim 1, characterized in that, The dust and salt removing and heat energy recovering device (3) is provided with a semi-automatic online ash removal device.