A coke oven flue gas desulfurization top tank reflux system and method

Abstract

This invention provides a coke oven flue gas desulfurization top tank reflux system and method, relating to the field of desulfurization spraying. It includes a top tank, a reflux tank, and a first flushing assembly. The bottom of the reflux tank has an outlet, and a filter element for filtering the slurry is installed at the outlet. The slurry enters the top tank after passing through the filter element. The first flushing assembly is installed on the reflux tank corresponding to the filter element, and is used to flush and unclog the filter element. By installing the first flushing assembly on the reflux tank, corresponding to the filter element, when the filter element is clogged, the first flushing assembly can be used to flush and unclog it. This avoids the need to stop the system to clean the filter element when it is clogged, saving labor costs and time associated with cleaning the filter element, and improving the stability and practicality of the coke oven flue gas desulfurization top tank reflux system during operation.

Description

Technical Field

[0001] This invention relates to the field of desulfurization spraying, and in particular to a coke oven flue gas desulfurization top tank reflux system and method. Background Technology

[0002] The top tank of the flue gas desulfurization system is used to receive and mix lime slurry and desulfurization slurry. The top tank has an open-type water tank structure and is equipped with an electric agitator at the top. The bottom of the return tank has an outlet, at which a filter is installed to filter the slurry. After passing through the filter, the slurry enters the top tank, which is equipped with an atomizer. An atomizer supply pipe is installed on the side wall of the top tank. After entering the atomizer, the slurry is atomized and used to desulfurize the flue gas.

[0003] During the operation of a flue gas desulfurization system, the presence of lumpy, compacted material or large particles in the slurry often clogs the filter elements at the bottom of the return tank, affecting the slurry supply to the top tank and consequently impacting the slurry spray volume from the atomizer. This results in a reduction in the slurry spray volume from the atomizer in the desulfurization system, making it difficult to meet desulfurization efficiency requirements. Currently, manually cleaning the filter elements at the bottom of the return tank requires workers to climb the desulfurization tower, a cumbersome and time-consuming process. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a coke oven flue gas desulfurization top tank reflux system and method to solve the problem of time-consuming and labor-intensive manual cleaning of the filter elements at the bottom of the reflux tank in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides a coke oven flue gas desulfurization top tank reflux system, comprising:

[0006] Top tank;

[0007] A reflux tank has an outlet at its bottom, and a filter element for filtering slurry is provided at the outlet. The slurry enters the top tank after passing through the filter element.

[0008] A first flushing assembly is disposed on the return tank corresponding to the filter element. The first flushing assembly is used to flush and unclog the filter element.

[0009] Optionally, the reflux tank and the top tank have a first reflux port for refluxing slurry, and a shielding member is provided on the first reflux port to prevent slurry from adhering to the first reflux port.

[0010] Optionally, the shield is canopy-shaped, and the opening of the shield is located at the lower part of the first return port.

[0011] Optionally, the top tank is provided with a second flushing assembly, which is used to flush and unclog the first return port.

[0012] Optionally, the first flushing assembly includes a first flushing water pipe and a first manual valve disposed on the first flushing water pipe, and the second flushing assembly includes a second flushing water pipe and a second manual valve disposed on the second flushing water pipe.

[0013] Optionally, the first flushing water pipe and the second flushing water pipe are branches of the flushing water pipe, and the flushing water pipe is connected to the flushing water pump.

[0014] Optionally, both the first flushing assembly and the second flushing assembly include an electric valve, which is used to control the flow of fluid in the first flushing water pipe and the second flushing water pipe.

[0015] Optionally, the filter element is barrel-shaped, and along the axial direction of the filter element, the cross-section of the filter element is conical. The opening of the filter element is located at the end with the smaller radius, and the opening is located at the outlet.

[0016] The present invention also provides a method for recirculating coke oven flue gas desulfurization top tank, including the coke oven flue gas desulfurization top tank recirculation system as described above, and the method for recirculating coke oven flue gas desulfurization top tank includes:

[0017] Obtain the liquid level position inside the top tank;

[0018] The filter element is rinsed based on the liquid level position and the preset liquid level value.

[0019] In one exemplary embodiment, rinsing the filter element based on the liquid level position and a preset liquid level value includes: rinsing the filter element if the liquid level position is less than or equal to the preset liquid level value.

[0020] As described above, the coke oven flue gas desulfurization top tank reflux system and method of the present invention have the following beneficial effects:

[0021] By installing a first flushing component on the reflux tank, corresponding to the filter element, the filter element can be flushed and cleared when it becomes clogged. This avoids the need to stop the system to clean the filter element when it becomes clogged, saving labor costs and time associated with filter cleaning, and improving the stability and practicality of the coke oven flue gas desulfurization top tank reflux system. Attached Figure Description

[0022] Figure 1 The diagram shown is a structural schematic of the coke oven flue gas desulfurization top tank reflux system according to an embodiment of the present invention.

[0023] Figure 2 Displayed as Figure 1 Enlarged diagram of point A in the middle.

[0024] Labeling Explanation: 1. Return Tank; 2. Second Return Port; 3. Desulfurization Slurry Tank; 4. Filter Component; 5. Top Tank Drain Pipe; 6. Manhole; 7. Top Tank; 8. Level Gauge; 9. Electric Valve; 10. First Manual Valve; 11. First Flushing Water Pipe; 12. Second Manual Valve; 13. Second Flushing Water Pipe; 14. Flushing Water Pipe; 15. Flushing Water Pump; 16. Shielding Component; 17. First Return Port. Detailed Implementation

[0025] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0026] Please see Figure 1 and Figure 2 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show components relevant to the present invention and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. The structures, proportions, and sizes shown in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of the present invention, should still fall within the scope of the technical content disclosed in the present invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are only for clarity of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the present invention.

[0027] Please see Figure 1This invention provides a coke oven flue gas desulfurization top tank reflux system, including a top tank, a reflux tank 1, and a first flushing assembly. The bottom of the reflux tank 1 has an outlet, and a filter element 4 for filtering slurry is provided at the outlet. The slurry enters the top tank after passing through the filter element 4. The first flushing assembly is provided on the reflux tank 1 corresponding to the filter element 4, and is used to flush and unclog the filter element 4. By providing the first flushing assembly on the reflux tank 1, corresponding to the filter element 4, when the filter element 4 is blocked, the first flushing assembly can be used to flush the filter element 4 and unclog it, saving labor costs for cleaning the filter element 4, reducing the time for cleaning the filter element 4, and improving the stability and practicality of the coke oven flue gas desulfurization top tank reflux system during operation. In this embodiment, the top of the reflux tank 1 is provided with a top cover, which is connected to the reflux tank 1 by a flange and bolts. The first flushing assembly is provided on the top cover of the reflux tank 1. By providing a top cover on the top of the reflux tank 1, it is convenient to inspect and maintain the first flushing assembly. The filter element 4 is flushed by the first flushing component, which flushes the blockage in the filter element 4 to the second return port 2, and then the blockage enters the desulfurization slurry tank 3. The blockage accumulated in the desulfurization slurry tank 3 can be cleaned during maintenance.

[0028] Please see Figure 2 The return tank 1 and the top tank 7 have a first return port 17 for returning slurry. A baffle 16 is provided on the first return port 17 to prevent slurry from adhering to it. By providing the first return port 17, it is possible to prevent excessive slurry in the top tank 7 from overflowing outside the return tank 1. The baffle 16 on the first return port 17 can block some of the slurry splashing towards it, reducing the amount of slurry adhering to the port and slowing down the rate at which slurry clogs the first return port 17.

[0029] Specifically, the shield 16 is canopy-shaped, and the opening of the shield 16 is located at the lower part of the first return port 17. The canopy-shaped shield 16 can block more slurry splashing onto the first return port 17, thus providing better protection for the first return port 17.

[0030] Specifically, a second flushing assembly is provided on the top tank 7, which is used to flush and unclog the first return port 17. The second flushing assembly, corresponding to the first return port 17, can unclog the first return port 17 when it is blocked, preventing slurry from overflowing to the outside of the top tank 7 after the first return port 17 becomes blocked. In this embodiment, the second flushing assembly is welded to the shielding member 16, and the flushing port of the second flushing assembly is positioned directly opposite the return port. Positioning the flushing port of the second flushing assembly directly opposite the return port enhances the flushing effect and improves flushing efficiency.

[0031] Please see Figure 1The first flushing assembly includes a first flushing water pipe 11 and a first manual valve 10 mounted on the first flushing water pipe 11. The second flushing assembly includes a second flushing water pipe 13 and a second manual valve 12 mounted on the second flushing water pipe 13. In actual use, both the first manual valve 10 and the second manual valve 12 remain normally open. When maintenance of the first flushing assembly is required, the first manual valve 10 is closed to facilitate maintenance. When maintenance of the second flushing assembly is required, the second manual valve 12 is closed to facilitate maintenance.

[0032] Specifically, the first flushing water pipe 11 and the second flushing water pipe 13 are branches of the flushing water pipe 14, which is connected to the flushing water pump 15. By using the flushing water pump 15, the flushing effect of the first and second flushing components can be improved, making the cleaning work more efficient. Furthermore, since the first and second flushing water pipes 11 and 13 share a single flushing water pump 15, equipment costs can be saved. In this embodiment, when the first or second flushing component is flushing, the pressure at the outlet of the flushing water pump 15 is greater than or equal to 0.6 MPa. By increasing the pressure at the outlet of the flushing water pump 15, the flushing effect of the first and second flushing components can be improved, increasing the flushing efficiency.

[0033] In detail, both the first flushing assembly and the second flushing assembly include an electric valve 9, which is used to control the flow of fluid in the first flushing water pipe 11 and the second flushing water pipe 13. By controlling the flow of fluid in the first flushing water pipe 11 and the second flushing water pipe 13 through the electric valve 9, labor costs can be reduced and the labor intensity of manual workers can be alleviated.

[0034] The filter element 4 is barrel-shaped, with a conical cross-section along its axial direction. The opening of the filter element 4 is located at the end with the smaller radius and is positioned at the outlet. In this embodiment, the barrel-shaped filter element 4 has multiple filter holes on its circumferential and bottom surfaces, arranged sequentially. This results in a large filtration area and high filtration efficiency for the filter element 4. In some embodiments, the filter barrel can be straight, and a filter groove for filtration can be provided on it. The shape and filtration structure of the filter barrel can be adjusted according to actual production needs.

[0035] In this embodiment, the bottom of the top tank 7 has a top tank drain pipe 5 for draining the slurry inside the top tank 7, and the top tank drain pipe 5 is connected to the desulfurization ash slurry tank 3. By setting the top tank drain pipe 5, it is convenient to drain the slurry inside the top tank 7 when the top tank 7 needs to be cleaned and repaired, and to open the manhole 6 to clean the sediment particles at the bottom of the top tank 7. A second return port 2 connected to the desulfurization ash slurry tank 3 is set in the return tank 1 below the first return port 17. When the slurry level in the return tank 1 is higher than the second return port 2, the slurry flows back into the desulfurization ash slurry tank 3 to prevent the slurry level in the top tank 7 from being too high, causing the slurry in the top tank 7 to overflow and affect the desulfurization of coke oven flue gas. A liquid level detector 8 is set on the top tank 7 to monitor the liquid level in the top tank 7.

[0036] This invention provides a coke oven flue gas desulfurization top tank reflux method, including the coke oven flue gas desulfurization top tank reflux system as described above. The coke oven flue gas desulfurization top tank reflux method includes: obtaining the liquid level position in the top tank 7; and rinsing the filter element 4 based on the liquid level position and a preset liquid level value.

[0037] In one exemplary embodiment, rinsing the filter element 4 based on the liquid level position and a preset liquid level value includes: rinsing the filter element 4 if the liquid level position is less than or equal to the preset liquid level value. In this embodiment, when the liquid level in the top tank 7 is less than or equal to 400 mm, the first rinsing assembly is automatically activated to rinse and unclog the filter element 4. In some embodiments, rinsing the filter element 4 can also be performed manually or remotely.

[0038] In this embodiment, if the return port needs to be rinsed, the return port must be rinsed first, and then the conical filter screen must be rinsed. When rinsing the return port, the deposits attached to the rinsing port will fall into the return tank 1, and these deposits may clog the filter element 4 in the return tank 1.

[0039] In summary, by installing a first flushing component on the reflux tank 1, corresponding to the filter element 4, when the filter element 4 becomes clogged, the first flushing component can be used to flush and unclog it. This avoids the need to stop the system to clean the filter element 4 when it becomes clogged, saving labor costs and time associated with cleaning the filter element 4, and improving the stability and practicality of the coke oven flue gas desulfurization top tank reflux system.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A coke oven flue gas desulfurization top tank reflux system, characterized in that, include: Top tank; A reflux tank has an outlet at its bottom, and a filter element for filtering slurry is provided at the outlet. The slurry enters the top tank after passing through the filter element. A first flushing assembly is disposed on the return tank corresponding to the filter element. The first flushing assembly is used to flush and unclog the filter element. The return tank and the top tank are provided with a first return port for returning slurry, and a shielding member is provided on the first return port to prevent slurry from adhering to the first return port. The top tank is equipped with a second flushing component, which is used to flush and unclog the first return port. The first flushing assembly includes a first flushing water pipe and a first manual valve disposed on the first flushing water pipe; the second flushing assembly includes a second flushing water pipe and a second manual valve disposed on the second flushing water pipe. Both the first flushing assembly and the second flushing assembly include an electric valve, which is used to control the flow of fluid in the first flushing water pipe and the second flushing water pipe.

2. The coke oven flue gas desulfurization top tank reflux system according to claim 1, characterized in that: The shield is canopy-shaped, and the opening of the shield is located at the lower part of the first return port.

3. The coke oven flue gas desulfurization top tank reflux system according to claim 1, characterized in that: The first and second flushing water pipes are branch pipes of the flushing water pipe, and the flushing water pipes are connected to the flushing water pump.

4. The coke oven flue gas desulfurization top tank reflux system according to claim 1, characterized in that: The filter element is barrel-shaped, and its cross-section is conical along its axial direction. The opening of the filter element is located at the end with the smaller radius, and the opening is located at the outlet.

5. A method for reflux of desulfurized top tank in coke oven flue gas, characterized in that, The coke oven flue gas desulfurization top tank reflux system as described in any one of claims 1-4, wherein the coke oven flue gas desulfurization top tank reflux method comprises: Obtain the liquid level position inside the top tank; The filter element is rinsed based on the liquid level position and the preset liquid level value.

6. The coke oven flue gas desulfurization top tank reflux method according to claim 5, characterized in that, Based on the liquid level position and the preset liquid level value, the filter element is rinsed, including: If the liquid level is less than or equal to the preset liquid level value, the filter element is rinsed.

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