Flue gas desulfurization system

Abstract

The application discloses a flue gas desulfurization system, comprising a top tank, a first outlet filter screen, a second outlet filter screen and a top tank outlet pipe; the top tank is used for receiving lime slurry and desulfurization ash slurry to form mixed slurry, and a mixed slurry outlet for outputting the mixed slurry is arranged on the top tank; the first outlet filter screen and the second outlet filter screen are arranged at the mixed slurry outlet and used for filtering the mixed slurry; one more outlet filter screen is added, so that the problem that large particles of stones in the slurry enter the atomizer and block the holes of the atomizing wheel after one of the outlet filter screens is removed can be effectively solved; in addition, the atomizer can keep normal spraying, and the desulfurization efficiency is ensured.

Description

Technical Field

[0001] This invention relates to the field of desulfurization spraying technology, and in particular to a flue gas desulfurization system. Background Technology

[0002] The top tank of the flue gas desulfurization system receives and mixes lime slurry and desulfurization slurry, and has an open tank structure. It is equipped with an electric agitator at the top. The lime slurry inlet, desulfurization slurry inlet, and slurry supply pipe outlet to the atomizer all have filters or screens, which are detachable. During operation, the filter screen at the top tank outlet of the flue gas desulfurization system often becomes clogged by lumpy deposits or large stones in the slurry, resulting in a significant reduction in slurry flow and causing the atomizer's spray volume to drop, failing to achieve desulfurization efficiency. The top tank outlet filter screen is routinely cleaned offline or during shutdown maintenance. During the offline cleaning and disassembly process, there is a risk that lumpy deposits or large stones in the slurry may enter the atomizer and clog the atomizing wheel holes due to the lack of filter filtration, causing excessive atomizer vibration and potentially leading to atomizer malfunction and shutdown, ultimately resulting in excessive sulfur dioxide emissions from the coke oven flue gas outlet.

[0003] Therefore, there is a need to propose a flue gas desulfurization system that can maintain its filtration function during the offline cleaning of the top tank outlet filter.

[0004] It should be noted that the information disclosed in the background section of this application is intended only to enhance the understanding of the general background of this application, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a flue gas desulfurization system that solves the problem in the prior art that the filtration function cannot be maintained during the offline cleaning of the top tank outlet filter.

[0006] To address the above technical issues, this application proposes a flue gas desulfurization system, including a top tank, a first outlet filter, a second outlet filter, and a top tank outlet pipe;

[0007] The top tank is used to receive lime slurry and desulfurization slurry to form a mixed slurry, and the top tank is provided with a mixed slurry outlet for discharging the mixed slurry;

[0008] The first outlet filter and the second outlet filter are disposed at the outlet of the mixed slurry for filtering the mixed slurry.

[0009] Optionally, the inner wall of the top tank is provided with a first upper slot, a first lower slot, a second upper slot, and a second lower slot;

[0010] The first outlet filter screen is fixed to the top tank by the first upper slot and the first lower slot;

[0011] The second outlet filter screen is fixed to the top tank by the second upper slot and the second lower slot.

[0012] Optionally, the top tank is also provided with a slurry overflow port for limiting the liquid level of the mixed slurry.

[0013] Optionally, the first upper slot and the second upper slot are positioned on the top tank at a position higher than the position of the mixed slurry overflow port on the top tank.

[0014] Optionally, the first upper slot and the second upper slot are integrally formed.

[0015] Optionally, the first lower slot and the second lower slot are integrally formed.

[0016] Optionally, the top tank is also provided with a maintenance cover, which is used to open the top tank when the flue gas desulfurization system is under maintenance.

[0017] Optionally, the flue gas desulfurization system further includes an agitator disposed inside the top tank.

[0018] Optionally, the top tank is also provided with a lime slurry inlet for inputting lime slurry.

[0019] Optionally, the top tank is also provided with a desulfurization slurry inlet for inputting desulfurization slurry.

[0020] Compared with the prior art, this application has the following beneficial effects:

[0021] 1. The flue gas desulfurization system proposed in this application adds an outlet filter screen, which effectively solves the problem of large particles of stone in the slurry entering the atomizer and clogging the atomizing wheel holes after one of the outlet filter screens is removed. In addition, it can maintain normal slurry spraying of the atomizer and ensure desulfurization efficiency.

[0022] 2. The first upper slot and the second upper slot are positioned on the top tank at a position higher than the position of the overflow port of the mixed slurry on the top tank, which can effectively solve the problem of accurate slot alignment when installing the outlet filter screen. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the flue gas desulfurization system proposed in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the second filter screen;

[0025] Figure 3 This is a schematic diagram of the filter screen slot structure;

[0026] Among them, 1-top tank, 2-agitator, 3-inspection cover plate, 4-lime slurry regulating valve; 5-desulfurization slurry inlet pipe, 6-mixed slurry overflow pipe, 7-control valve, 8-upper slot of filter screen, 9-lower slot of filter screen, 10-second outlet filter screen, 11-first outlet filter screen, 12-top tank outlet pipe, 13-liquid level of mixed slurry, 14-slot position of second filter screen, 15-slot position of first filter screen, 16-filter screen pull rod, 17-filter screen, 18-filter screen slot. Detailed Implementation

[0027] The specific embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0028] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] Please refer to Figures 1 to 3 The present invention provides a flue gas desulfurization system, including a top tank 1, a first outlet filter 11, a second outlet filter 10, and a top tank outlet pipe 12;

[0031] The top tank 1 is used to receive lime slurry and desulfurization slurry to form a mixed slurry, and the top tank 1 is provided with a mixed slurry outlet for discharging the mixed slurry;

[0032] The first outlet filter 11 and the second outlet filter 10 are disposed at the outlet of the mixed slurry for filtering the mixed slurry.

[0033] Unlike existing technologies, the flue gas desulfurization system proposed in this embodiment adds an outlet filter, which effectively solves the problem of large particles of stone in the slurry entering the atomizer and clogging the atomizing wheel holes after one of the outlet filters is removed. Furthermore, it ensures normal slurry spraying by the atomizer, guaranteeing desulfurization efficiency.

[0034] Specifically, in this embodiment, the inner wall of the top tank 1 is provided with a first upper slot, a first lower slot, a second upper slot, and a second lower slot;

[0035] The first outlet filter screen 11 is fixed to the top tank 1 by the first upper slot and the first lower slot;

[0036] The second outlet filter 10 is fixed to the top tank 1 by the second upper slot and the second lower slot.

[0037] Specifically, in this embodiment, the top tank 1 is also provided with a mixed slurry overflow port 6 for limiting the liquid level 13 of the mixed slurry.

[0038] The applicant also discovered that the existing outlet filter slot is installed at the bottom of the top tank 1. During installation, the liquid level 13 of the mixed slurry is higher than the filter slot position, and the slurry is turbid, making it difficult to accurately see the slot, resulting in poor installation efficiency due to alignment difficulties. To solve this problem, in this embodiment, the first upper slot and the second upper slot are positioned on the top tank 1 at a position higher than the position of the mixed slurry overflow port 6 on the top tank 1.

[0039] Specifically, in this embodiment, the first upper slot and the second upper slot are integrally formed to form the upper slot 8 of the filter screen.

[0040] Specifically, in this embodiment, the first lower slot and the second lower slot are integrally formed to constitute the lower slot 9 of the filter screen.

[0041] Specifically, in this embodiment, the top tank 1 is also provided with a maintenance cover 3, which is used to open the top tank 1 when the flue gas desulfurization system is being maintained.

[0042] Specifically, in this embodiment, the flue gas desulfurization system further includes an agitator 2, which is disposed inside the top tank 1.

[0043] Specifically, in this embodiment, the top tank 1 is also provided with a lime slurry inlet for inputting lime slurry.

[0044] Specifically, in this embodiment, the top tank 1 is also provided with a desulfurization slurry inlet 5 for inputting desulfurization slurry.

[0045] This invention provides a flue gas desulfurization system, mainly consisting of an additional filter screen and a new filter screen positioning slot. Firstly, it solves the problem of large particles of stone in the slurry entering the atomizer and clogging the atomizing wheel holes after the outlet filter screen is removed. Secondly, it solves the problem of accurate positioning of the slot during outlet filter screen installation.

[0046] The flue gas desulfurization system proposed in this embodiment mainly includes: a top tank 1, a top tank 1 inspection cover 3, a first outlet filter 11, a second outlet filter 10, a lower groove 9 for the filter screen, an upper groove 8 for the filter screen, a lime slurry inlet, a desulfurization slurry inlet 5, a mixed slurry overflow outlet, a stirrer 2, a top tank outlet pipe 12, and an atomizer.

[0047] The first outlet filter 11 is located on the lower side of the top tank 1 body. In this embodiment, the diameter of the holes in the first outlet filter 11 can be set to 4mm. The first outlet filter 11 is fixed by a slot on the lower side of the top tank 1. The mixed slurry flows to the atomizer through the outlet screen and the mixing port. The upper slot of the screen is installed in the upper middle part of the side of the top tank 1 body, slightly higher than the overflow port of the mixed slurry, and perpendicular to the lower slot. The liquid level 13 of the mixed slurry is higher than the lower slot 9 of the filter screen, and the position of the slot cannot be accurately seen due to the turbidity of the slurry. By utilizing the alignment effect of the upper slot in the top tank 1, which is higher than the liquid level, the filter screen can be accurately inserted into the lower slot.

[0048] like Figure 1 As shown, the process for removing the first outlet filter screen 11 in the top tank 1 is as follows: stop the lime slurry regulating valve 4 from feeding, stop the desulfurization slurry inlet pipe from feeding, stop the agitator 2 from operating, open the inspection cover 3 of the top tank 1, insert the second outlet filter screen 10 into the upper slot 8 of the filter screen, and then position it along the upper slot 8 to insert it into the lower slot 9 of the filter screen. The second outlet filter screen 10 and the first outlet filter screen 11 are arranged side by side, as shown. Figure 2 As shown. After the second outlet filter 10 is installed, the first outlet filter 11 is pulled out from the lower slot 9 and then from the upper slot 8. The first outlet filter 11 is then cleaned offline. After the first outlet filter 11 is removed, the lime slurry regulating valve 4 is restored to feed, the desulfurization slurry inlet pipe is restored to feed, the agitator 2 is started, and the inspection cover 3 of the top tank 1 is closed. During the removal of the first outlet filter 11, the liquid level 13 of the mixed slurry is kept at a high level, the slurry flow control valve 7 of the top tank 1 is used normally, and the atomizer is kept spraying slurry normally to ensure desulfurization efficiency.

[0049] Installation procedure for the first outlet filter screen 11 in top tank 1: Stop the lime slurry regulating valve 4 from feeding, stop the desulfurization slurry inlet pipe from feeding, stop the agitator 2 from operating, open the inspection cover 3 of top tank 1, insert the first outlet filter screen 11 into the upper slot 8 of the filter screen, and then insert it into the lower slot 9 of the filter screen along the upper slot 8. The first outlet filter screen 11 and the second outlet filter screen 10 are arranged side by side. Figure 2 As shown. After the first outlet filter 11 is installed, the second outlet filter 10 is pulled out from the lower slot 9 and then from the upper slot 8. After the second outlet filter 10 is pulled out, the lime slurry regulating valve 4 is restored to feed, the desulfurization slurry inlet pipe is fed, the agitator 2 is started for stirring, and the inspection cover 3 of the top tank 1 is closed. During the installation of the first outlet filter 11, the liquid level 13 of the mixed slurry is kept at a high level, the slurry flow control valve 7 of the top tank 1 is used normally, and the atomizer sprays slurry normally to ensure desulfurization efficiency.

[0050] Compared with the prior art, this application has the following beneficial effects:

[0051] 1. The flue gas desulfurization system proposed in this application adds an outlet filter screen, which effectively solves the problem of large particles of stone in the slurry entering the atomizer and clogging the atomizing wheel holes after one of the outlet filter screens is removed. In addition, it can maintain normal slurry spraying of the atomizer and ensure desulfurization efficiency.

[0052] 2. The first upper slot and the second upper slot are positioned on the top tank at a position higher than the position of the overflow port of the mixed slurry on the top tank, which can effectively solve the problem of accurate slot alignment when installing the outlet filter screen.

[0053] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0054] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the present invention. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and content disclosed in the present invention without departing from the scope of the present invention shall be deemed to have remained within the protection scope of the present invention.

Claims

1. A flue gas desulfurization system characterized by, The top tank, the first outlet filter screen, the second outlet filter screen, and the top tank outlet pipe are included. The top tank is used for receiving lime slurry and desulfurization ash slurry to form mixed slurry, and a mixed slurry outlet for outputting the mixed slurry is arranged on the top tank. The first outlet filter screen and the second outlet filter screen are arranged at the mixed slurry outlet and used for filtering the mixed slurry. First upper clamping grooves and first lower clamping grooves are arranged on the inner wall of the top tank. The first outlet filter screen is fixed on the top tank through the first upper clamping grooves and the first lower clamping grooves. The second outlet filter screen is fixed on the top tank through the second upper clamping grooves and the second lower clamping grooves. A mixed slurry overflow pipe orifice for limiting the liquid level of the mixed slurry is further arranged on the top tank. The positions of the first upper clamping grooves and the second upper clamping grooves on the top tank are higher than the position of the mixed slurry overflow pipe orifice on the top tank. The flue gas desulfurization system further includes a stirrer arranged inside the top tank.

2. The flue gas desulfurization system as claimed in claim 1, wherein The first upper clamping grooves and the second upper clamping grooves are integrally formed.

3. The flue gas desulfurization system as claimed in claim 1, wherein The first lower clamping grooves and the second lower clamping grooves are integrally formed.

4. The flue gas desulfurization system as claimed in claim 1, wherein An inspection cover plate is further arranged on the top tank and used for opening the top tank when the flue gas desulfurization system is inspected.

5. The flue gas desulfurization system as claimed in claim 1, wherein A lime slurry inflow pipe orifice for inputting lime slurry is further arranged on the top tank.

6. The flue gas desulfurization system as claimed in claim 1, wherein A desulfurization ash slurry inflow pipe orifice for inputting desulfurization ash slurry is further arranged on the top tank.

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