Kiln flue gas desulfurization and dust removal device
By using a U-shaped tube series structure and mesh plate design, the system achieves efficient absorption of sulfur dioxide and dust in kiln flue gas, solving the problem of insufficient sulfur dioxide absorption in existing equipment, improving desulfurization efficiency and simplifying maintenance procedures.
Patent Information
- Application Number
- CN202520034325.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-07
AI Technical Summary
In existing kiln flue gas desulfurization equipment, sulfur dioxide absorption is insufficient and desulfurization efficiency is low, resulting in environmental pollution. Furthermore, multi-stage desulfurization towers occupy a large area and have low efficiency.
The system employs a three-U-shaped tube series structure, with a mesh plate inside each U-shaped tube. The flue gas is propelled by air pressure to circulate and contact the desulfurization liquid, forming a three-stage desulfurization system. The flue gas is divided into fine bubbles to increase the contact area. The desulfurization liquid absorbs sulfur dioxide and dust, and the precipitate is discharged through the discharge pipe.
It improves sulfur dioxide absorption efficiency, ensures extremely low sulfur dioxide content in flue gas, achieves simultaneous dust removal, simplifies maintenance, and guarantees the continuity and stability of the desulfurization process.
Smart Images
Figure CN223668964U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a tail gas treatment equipment technical field, concretely relates to a kiln flue gas desulfurization dust removal device. BACKGROUND
[0002] The kiln is a kind of industrial equipment for high-temperature treatment material, is widely used in metallurgy, building material (such as cement, glass), chemical industry etc. industry. It provides the heat required by burning fuel (coal, natural gas, oil etc.) or electric heating to realize such as calcination, melting, drying, heat treatment etc. process. According to the different purposes and design, kiln can be divided into multiple types, including rotary kiln, tunnel kiln, upside-down flame kiln etc. However, kiln contains a certain amount of sulfur in the fuel used in the use process, when fuel burns in kiln, sulfur will participate in oxidation reaction to generate sulfur dioxide, and under the condition of incomplete combustion, part of hydrocarbons fails to fully oxidize, forms carbon black, tar etc. solid or semi-solid particles suspended in flue gas. Therefore, the flue gas discharged by kiln contains sulfur and smoke dust, if flue gas is not treated, it will cause the environment to be influenced, now for flue gas desulfurization, wet desulfurization tower is generally used, and water mist containing absorbent is sprayed to capture sulfur dioxide in flue gas. But this kind of way carries out flue gas desulfurization, it can appear that flue gas and absorbent are not fully contacted or contact time is too short and lead to sulfur dioxide absorption insufficient, therefore, in order to guarantee that tail gas meets the standard, multiple desulfurization towers are usually connected in series to improve desulfurization effect, but this kind of way undoubtedly makes the required site increase, and desulfurization efficiency is also low. Therefore, now urgently needed is a desulfurization dust removal equipment that can make sulfur dioxide and absorbent fully contact. CONTENT OF UTILITY MODEL
[0003] The utility model intends to provide a kiln flue gas desulfurization dust removal device to solve the problem that sulfur dioxide can not be fully absorbed when the present desulfurization tower carries out desulfurization.
[0004] To solve the above technical problem, the utility model provides the following technical scheme: a kiln flue gas desulfurization dust removal device, including box and desulfurization mechanism, the desulfurization mechanism includes three U-shaped tubes, and the U-shaped tube is vertically fixed in the box through the fixed frame, and the inner bottom of the vertical section of the right side of each U-shaped tube is fixedly connected with a mesh plate, the bottom of the U-shaped tube is connected with the vertical discharge pipe, and the bottom of the discharge pipe passes through the bottom of the box and is located outside the box, and the discharge pipe is provided with a switch valve.
[0005] Two inverted "U"-shaped connecting pipes are arranged in the box, and the two connecting pipes are used to connect the three U-shaped tubes in series, the end of the U-shaped tube located at the front end is connected with an inlet flue, and the gas inlet end of the inlet flue passes through the box and is located outside the box, and the end of the U-shaped tube located at the tail end is connected with an exhaust pipe.
[0006] The utility model discloses a working principle: before using, three U -shaped tubes all inject desulfurization liquid, and the liquid level height of desulfurization liquid is lower than the height of liquid supplementing pipe, and the liquid supplementing pipe is in the closed state when using, then passes through flue to the U -shaped tube of front end and passes in kiln flue gas, when kiln flue gas enters the U -shaped tube, and kiln flue gas passes through the gas pressure and is pressed into the vertical pipe of U -shaped tube right side in the left side of U -shaped tube desulfurization liquid, and when kiln flue gas flows to the bottom of U -shaped tube, and kiln flue gas floats to the top from the bottom of U -shaped tube right side vertical pipe under the action of buoyancy, and kiln flue gas is separated into multiple small bubbles by the gap on the screen during the process of floating, and sulfur dioxide and dust in kiln flue gas are absorbed by desulfurization liquid at this moment.
[0007] The utility model discloses the beneficial effects of:
[0008] 1, the screen in the U -shaped tube of this scheme divides the kiln flue gas that enters into multiple small bubbles, greatly increases the gas -liquid contact area, improves sulfur dioxide absorption efficiency, makes desulfurization more thoroughly, and three U -shaped tubes that are connected in series form three -level desulfurization system, and every stage can carry out effective treatment to the pollutant in flue gas, after multiple circulation absorption, ensure that the sulfur dioxide content in the gas that finally discharges is extremely low, effectively ensure that sulfur dioxide in kiln flue gas is fully absorbed.
[0009] 2, the solid precipitate generated in the desulfurization process in this scheme can naturally settle to the bottom of U -shaped tube, and can conveniently discharge through the discharge pipe, need not additional mechanical stirring or conveying device, simplifyed the maintenance work.
[0010] 3, the desulfurization liquid of a certain height is kept in each U -shaped tube, guarantees continuous stable desulfurization process, and the existence of liquid supplementing pipe can supplement liquid when necessary, maintains the normal operation of system.
[0011] Further, the upper part of the right vertical pipe of the U-shaped pipe at the front end and the middle part is communicated with a guide pipe, the guide pipe on the U-shaped pipe at the front end passes through the left vertical pipe of the U-shaped pipe at the middle part and is communicated with the left vertical pipe, the guide pipe on the U-shaped pipe at the middle part passes through the left vertical pipe of the U-shaped pipe at the tail end and is communicated with the left vertical pipe; the left vertical pipe of the U-shaped pipe at the front end is communicated with a liquid supplementing pipe, the liquid inlet end of the liquid supplementing pipe passes through the box body and is located outside the box body. When it is needed to supplement the desulfurization liquid, the desulfurization liquid is injected into the U-shaped pipe at the front end through the liquid supplementing pipe, when the liquid level of the desulfurization liquid in the U-shaped pipe at the front end reaches the guide pipe, the desulfurization liquid in the U-shaped pipe at the front end flows into the U-shaped pipe at the middle part through the guide pipe, and in the same way, when the liquid level of the desulfurization liquid in the U-shaped pipe at the middle part reaches the guide pipe, the desulfurization liquid in the U-shaped pipe at the middle part flows into the U-shaped pipe at the tail end through the guide pipe, so that the desulfurization liquid in the three U-shaped pipes can be supplemented.
[0012] Further, the liquid outlet end of the two guide pipes is inclined downward. Through the arrangement, the desulfurization liquid can flow out of the guide pipe and avoid remaining in the guide pipe.
[0013] Further, the mesh plate is disc-shaped, and the diameter of the mesh plate is the same as the inner diameter of the U-shaped pipe. Through the arrangement, the mesh plate can be completely fitted and installed in the U-shaped pipe. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a structural schematic view of the kiln flue gas desulfurization and dust removal device.
[0015] Figure 2 It is a structural schematic view of the mesh plate. Figure 1 It is a structural schematic view of the mesh plate. DETAILED DESCRIPTION
[0016] The following will be further described in detail through specific embodiments:
[0017] The reference signs in the drawings of the specification include: the box body 1, the smoke inlet channel 2, the U-shaped pipe one 3, the liquid supplementing pipe 4, the mesh plate 5, the material discharging pipe 6, the on-off valve 7, the supporting leg 8, the guide pipe 9, the connecting pipe 10, the exhaust pipe 11, the U-shaped pipe three 12 and the U-shaped pipe two 13.
[0018] The embodiment is basically as shown in the accompanying drawings: Figure 1 and the accompanying drawings: Figure 2
[0019] A kind of kiln flue gas desulfurization dust removal device, including box 1 and desulfurization mechanism, the bottom of box 1 is fixedly connected with four support feet 8, and desulfurization mechanism includes three identical U-shaped pipe one 3, U-shaped pipe two 13 and U-shaped pipe three 12, U-shaped pipe one 3, U-shaped pipe two 13 and U-shaped pipe three 12 are vertically fixed in box 1 by fixed frame, the inner bottom of the right side vertical section of U-shaped pipe one 3, U-shaped pipe two 13 and U-shaped pipe three 12 is fixedly connected with disc-shaped screen plate 5, the bottom end of U-shaped pipe one 3, U-shaped pipe two 13 and U-shaped pipe three 12 is fixedly connected with vertical discharge pipe 6, and the bottom end of each discharge pipe 6 is downward through the bottom of box 1 and located outside box 1, and the end of discharge pipe 6 located outside box 1 is equipped with switch valve 7.
[0020] Two inverted "U"-shaped connecting pipes 10 are arranged in box 1, one of connecting pipes 10 is connected with the tail end of U-shaped pipe one 3 and the head end of U-shaped pipe two 13, the other connecting pipe 10 is connected with the tail end of U-shaped pipe two 13 and the head end of U-shaped pipe three 12, the head end of U-shaped pipe one 3 is connected with inlet flue 2, the gas inlet end of inlet flue 2 is transversely through box 1 and located outside box 1, the end of U-shaped pipe three 12 is connected with exhaust pipe 11, and exhaust pipe 11 is transversely through box 1 and located outside box 1.The upper part of the right side vertical pipe of U-shaped pipe one 3 and U-shaped pipe two 13 is communicated with downward inclined duct 9, the duct 9 on U-shaped pipe one 3 passes through the left side vertical pipe of U-shaped pipe two 13 and is communicated with it, and the duct 9 on U-shaped pipe two 13 passes through the left side vertical pipe of U-shaped pipe three 12 and is communicated with it;The left side vertical pipe of U-shaped pipe one 3 is communicated with liquid supplement pipe 4, and the liquid inlet end of liquid supplement pipe 4 is through box 1 and located outside box 1.
[0021] Specific implementation process is as follows:
[0022] Before use, the U-shaped tube one 3, the U-shaped tube two 13 and the U-shaped tube three 12 are all filled with desulfurization liquid (limestone desulfurization liquid), the liquid level of the desulfurization liquid is lower than the height of the liquid supplement pipe 4, the liquid supplement pipe 4 is in a closed state during use, then the kiln flue gas is introduced into the U-shaped tube one 3 through the smoke inlet 2, when the kiln flue gas enters the U-shaped tube, the kiln flue gas pressurizes the desulfurization liquid in the vertical pipe on the left side of the U-shaped tube into the vertical pipe on the right side of the U-shaped tube one 3, and when the kiln flue gas flows to the bottom of the U-shaped tube one 3, the kiln flue gas floats up from the bottom end of the desulfurization liquid in the vertical pipe on the right side of the U-shaped tube to the top end under the action of buoyancy, the kiln flue gas is separated into multiple small bubbles by the gap on the screen plate 5 during the floating process, which increases the contact area between the kiln flue gas and the desulfurization liquid, and at the same time, the screen plate 5 blocks and delays the floating speed of the kiln flue gas, at this time, the sulfur dioxide and dust in the kiln flue gas are absorbed by the desulfurization liquid. After the kiln flue gas floats up from the bottom end to the top end of the vertical pipe on the right side of the U-shaped tube one 3, it enters the U-shaped tube two 13 through the connecting pipe 10, and the process is repeated until the kiln flue gas completely flows through the U-shaped tube two 13 and the U-shaped tube three 12, so that the sulfur dioxide and dust in the kiln flue gas are also absorbed by the desulfurization liquid, and the kiln flue gas with absorbed sulfur dioxide and dust is discharged from the box body 1 through the exhaust pipe 11, and the precipitate generated after the desulfurization liquid absorbs sulfur dioxide sinks to the bottom of the U-shaped tube, when it is necessary to discharge the precipitate, since the bottom end of the U-shaped tube is connected with a vertical discharge pipe 6, opening the on-off valve 7 on the discharge pipe 6 can make the precipitate discharge from the U-shaped tube through the discharge pipe 6 under the action of gravity.
[0023] When it is necessary to supplement the desulfurization liquid, the desulfurization liquid is injected into the U-shaped tube one 3 through the liquid supplement pipe 4, when the liquid level of the desulfurization liquid in the U-shaped tube one 3 reaches the position of the conduit 9, the desulfurization liquid in the U-shaped tube one 3 flows into the U-shaped tube two 13 through the conduit 9, and in the same way, when the liquid level of the desulfurization liquid in the U-shaped tube two 13 reaches the position of the conduit 9, the desulfurization liquid in the U-shaped tube two 13 flows into the U-shaped tube three 12 through the conduit 9, so that the desulfurization liquid in the three U-shaped tubes can be supplemented.
Claims
1. A kiln flue gas desulfurization and dust removal device, characterized in that: The desulfurization mechanism comprises three U-shaped pipes which are vertically fixed in the box through a fixing frame, the inner bottom of the vertical section of the right side of each U-shaped pipe is fixedly connected with a screen plate, the bottom end of the U-shaped pipe is connected with a vertical discharge pipe, the bottom end of the discharge pipe penetrates through the bottom of the box and is located outside the box, and a switch valve is installed on the discharge pipe; Two inverted U-shaped connecting pipes are arranged in the box, the two connecting pipes are used to connect the three U-shaped pipes end to end, the end of the U-shaped pipe located at the front end is connected with a smoke inlet pipe, the gas inlet end of the smoke inlet pipe penetrates through the box and is located outside the box, and the end of the U-shaped pipe located at the tail end is connected with an exhaust pipe.
2. A kiln flue gas desulphurization and dust removal device according to claim 1, characterized in that: The upper part of the right side vertical pipe of the two U-shaped pipes located at the front end and the middle part is communicated with a guide pipe, the guide pipe on the U-shaped pipe located at the front end penetrates through and communicates with the left side vertical pipe of the U-shaped pipe located at the middle part, and the guide pipe on the U-shaped pipe located at the middle part penetrates through and communicates with the left side vertical pipe of the U-shaped pipe located at the tail end; the left side vertical pipe of the U-shaped pipe located at the front end is communicated with a liquid supplementing pipe, and the liquid inlet end of the liquid supplementing pipe penetrates through the box and is located outside the box.
3. A kiln flue gas desulphurization and dust removal device according to claim 2, characterized in that: The liquid outlet ends of the two guide pipes are downwardly inclined.
4. A kiln flue gas desulphurization and dust removal device according to claim 3, characterized in that: The screen plate is disc-shaped, and the diameter of the screen plate is the same as the inner diameter of the U-shaped pipe.