Novel ash bin excess pressure discharging device
By designing a new type of ash silo residual pressure discharge device and using airflow to perform secondary reaction of ash material, the environmental pollution and equipment damage caused by the residual pressure discharge of ash silo was solved, and the cost saving and normal operation effect was achieved.
Patent Information
- Application Number
- CN202421313424.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-11
AI Technical Summary
After the desulfurization of the flue gas of the hot air furnace, the residual pressure in the ash bin is discharged directly, resulting in environmental pollution, damage to the dust collector and blockage of the ash pipeline.
A new type of ash silo residual pressure discharge device is designed, including a desulfurization dust collector, a screw ash conveyor, a drain pipe and a drain valve. Some ash material is entered into the desulfurization air inlet flue for secondary reaction through airflow to reduce residual pressure discharge.
It effectively saves the installation and use cost of single-point dust collector, avoids pressure loading in the warehouse and damage to the dust collector, ensures the normal operation of the ash delivery pipeline, and saves the use of sodium bicarbonate through secondary reactions.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of desulfurization, and in particular relates to a novel ash bin residual pressure discharge device. Background Art
[0002] The flue gas desulfurization facility of the hot blast furnace, the flue gas enters the sodium-based (NaHCO3) dry desulfurization (SDS) dust removal integrated system. The flue gas first enters the SDS desulfurization reactor, in which ultrafine sodium bicarbonate powder is sprayed. Under the action of high-temperature flue gas, the ultrafine sodium bicarbonate powder decomposes highly active sodium carbonate and carbon dioxide. The highly active Na2CO3 fully contacts with SO2 and other acidic media in the flue gas in the flue to react chemically and is absorbed and purified.
[0003] The by-products after hot air flue gas desulfurization are solid waste. The residual pressure on the top of the silo is released and discharged directly during gas ash transportation, causing environmental pollution. For example, if a single-point dust collector is added due to site limitations, it is impossible to add a dust collector that meets the filtration requirements, and the good effect of dust removal, filtration and pressure relief cannot be achieved, resulting in pressure buildup in the silo and damage to the filter bags and keels of the single-point dust collector. Direct release from the silo top or damage to the filter bags causes dust pollution, an environmental accident. The pressure buildup in the silo reduces the flow rate of the ash conveying pipeline, causing pipeline blockage.
[0004] Therefore, a new type of ash silo residual pressure discharge device is needed. Utility Model Content
[0005] The utility model aims to provide a novel ash bin residual pressure discharge device.
[0006] The technical solution adopted by the utility model to solve its technical problems is: a new type of ash bin residual pressure discharge device, including a desulfurization dust collector, a spiral ash conveyor is provided at the bottom of the desulfurization dust collector, the spiral ash conveyor transports ash to a by-product bin through a gas ash bin pump and an ash conveying pipe, a discharge pipe is provided on the top of the by-product bin, the top of the discharge pipe is connected to the desulfurization air inlet flue of the desulfurization dust collector, and part of the ash enters the desulfurization air inlet flue through the airflow for secondary reaction.
[0007] Specifically, a relief valve is installed on the relief pipe.
[0008] Specifically, a feeder is provided at the bottom of the by-product bin, and a gate valve is provided between the feeder and the by-product bin.
[0009] Specifically, a ash discharge pipe is provided at the bottom of the feeder.
[0010] The utility model has the following beneficial effects:
[0011] 1) After the desulfurization by-product silo residual pressure release method was modified, the installation and use cost of the silo top single-point dust collector was saved;
[0012] 2) Avoid the pressure build-up in the silo caused by untimely pressure release and the damage to the filter bags and keels of the dust collector caused by the pressure build-up in the silo;
[0013] 3) Ensure the normal operation of the ash conveying pipeline;
[0014] 4) After the gas ash is transported into the by-product bin, part of the ash enters the air inlet flue through the air flow for secondary reaction, saving the use of sodium bicarbonate. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model.
[0016] In the figure: 1-desulfurization dust collector; 2-screw ash conveyor; 3-gas ash conveying silo pump; 4-ash conveying pipe; 5-by-product silo; 6-vent pipe; 7-vent valve; 8-feeder; 9-gate valve; 10-ash discharge pipe; 11-desulfurization air inlet duct. DETAILED DESCRIPTION
[0017] The utility model will now be further described in detail with reference to the accompanying drawings.
[0018] like Figure 1 As shown, a novel ash bin residual pressure discharge device comprises a desulfurization dust collector 1. A spiral ash conveyor 2 is provided at the bottom of the desulfurization dust collector 1. The spiral ash conveyor 2 conveys ash to a by-product bin 5 through a gas ash bin pump 3 and an ash conveying pipe 4. A venting pipe 6 is provided at the top of the by-product bin 5. The top of the venting pipe 6 is connected to the desulfurization air inlet flue 11 of the desulfurization dust collector 1. Part of the ash enters the desulfurization air inlet flue 11 through the airflow for secondary reaction.
[0019] A relief valve 7 is installed on the relief pipe 6, and the relief valve 7 is interlocked with the ash conveying system. A feeder 8 is provided at the bottom of the by-product bin 5, a gate valve 9 is provided between the feeder 8 and the by-product bin 5, and an ash discharge pipe 10 is provided at the bottom of the feeder 8.
[0020] The working principle of the utility model is as follows: the gas ash conveying bin pump 3 is connected to the top of the by-product bin 5 through the ash conveying pipe 4 to convey the blowing material downward in the direction opposite to the desulfurization air inlet pipe 11; a DN125 relief valve 7 is added to the relief pipe 6 at the top of the by-product bin 5, and the relief pipe 6 is extended and connected to the bottom of the desulfurization air inlet pipe 11; the relief valve 7 at the top of the by-product bin 5 is interlocked with the ash conveying system, and the relief valve 7 is automatically opened when the gas ash conveying system is started.
[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A new type of ash silo residual pressure discharge device, characterized in that: It includes a desulfurization dust collector, a spiral ash conveyor is provided at the bottom of the desulfurization dust collector, the spiral ash conveyor transports ash to the by-product bin through a gas ash bin pump and an ash conveying pipe, a vent pipe is provided on the top of the by-product bin, the top of the vent pipe is connected to the desulfurization air inlet flue of the desulfurization dust collector, and part of the ash enters the desulfurization air inlet flue through the airflow for secondary reaction.
2. A novel ash silo residual pressure discharge device according to claim 1, characterized in that: A relief valve is installed on the relief pipe.
3. The novel ash silo residual pressure discharge device according to claim 1 is characterized in that: A feeder is provided at the bottom of the by-product bin, and a gate valve is provided between the feeder and the by-product bin.
4. The novel ash bin residual pressure discharge device according to claim 3 is characterized in that: A ash discharge pipe is provided at the bottom of the feeder.