Wet flue gas desulfurization gypsum treatment method

Abstract

A wet flue gas desulfurization gypsum treatment method, comprising: feeding a desulfurization gypsum slurry from a gypsum hydrocyclone through a distributor (200) of a filter (100); the filter (100) operating to move the desulfurization gypsum slurry to a first rinsing component (300); the filter (100) operating to move the desulfurization gypsum slurry to a first filter cake loosening component (400); the filter (100) operatingto move the desulfurization gypsum slurry to a second rinsing component (500); the filter (100) operating to move the desulfurization gypsum slurry to a second filter cake loosening component (600); and the filter (100) operating to move the desulfurization gypsum slurry to a discharge component (700). Thus, the situation that the solid-liquid separation effect is poor due to sealing of oil films is avoided.

Description

A method for treating wet desulfurization gypsum Technical Field

[0001] The invention relates to the technical field of limestone-gypsum wet desulfurization, and in particular to a method for treating wet desulfurization gypsum. Background Art

[0002] Limestone-gypsum wet desulfurization technology is a common desulfurization method in thermal power plants. This method involves bringing a gypsum slurry into contact with flue gas within an absorption tower, allowing the SO2 present in the gypsum to react and remove it from the flue gas. The desulfurized gypsum, typically in the form of a slurry, requires dehydration, typically using a vacuum belt filter.

[0003] However, during the desulfurization process, gypsum often contains a certain amount of oil. Oil has a low density and easily forms an oil film on the gypsum surface. When this oil film exists, the negative pressure surface in the filter is above the oil film on the upper surface of the filter cake, resulting in poor solid-liquid separation and low dehydration efficiency. The resulting dry gypsum material is difficult to meet discharge requirements.

[0004] In summary, for the oil-containing sulfur gypsum produced by limestone-gypsum wet desulfurization technology in thermal power plants, in order to improve the dehydration effect, auxiliary treatment technology is added to the existing vacuum belt filter to solve the influence of oil film on the filtration effect to meet the emission requirements.

[0005] Summary of the Invention

[0006] In view of the above problems existing in the existing wet desulfurization gypsum treatment method, the present invention is proposed.

[0007] Therefore, the present invention aims to provide a method for treating wet desulfurization gypsum. During the desulfurization process, gypsum often contains a certain amount of oil. Oil has a low density and easily forms an oil film on the gypsum surface. When this oil film exists, the negative pressure surface in the filter sits above the oil film on the filter cake's upper surface, resulting in poor solid-liquid separation and low dehydration efficiency. The resulting dry gypsum is unlikely to meet discharge requirements.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising:

[0009] The sulfur gypsum slurry enters the filter from the gypsum cyclone through the distributor;

[0010] The filter operates to move the sulfur gypsum slurry to the first washing part;

[0011] The filter is operated to move the sulfur gypsum slurry to the first filter cake loose part;

[0012] The filter is operated to move the sulfur gypsum slurry to the second washing part;

[0013] The filter is operated to move the sulfur gypsum slurry to the second filter cake loose part;

[0014] The filter operates to move the sulfur gypsum slurry to the discharge part.

[0015] As a preferred embodiment of the wet desulfurization gypsum treatment method of the present invention, the filter is used to drive the sulfur gypsum slurry to move step by step, and vacuum the sulfur gypsum slurry to gradually dehydrate it;

[0016] The distributor arranges the sulfur gypsum slurry on the filter cloth surface of the filter;

[0017] The first washing component is used to remove water-soluble substances and grease in the sulphur gypsum slurry;

[0018] The first filter cake loosening component is used to plow a plurality of grooves on the surface of the filter cake formed by the sulfur gypsum slurry, thereby increasing the contact area between the gas and the filter cake and removing moisture from the filter cake;

[0019] The second washing component plows a plurality of grooves on the surface of the filter cake to further remove water-soluble substances and grease in the sulphur gypsum slurry;

[0020] The second filter cake loosening component is used to break the oil film formed in the grooves on the filter cake surface in the previous step;

[0021] The discharging component separates the filter cake from the filter through a scraper and causes the filter cake to fall into the collecting trough.

[0022] As a preferred solution of the wet desulfurization gypsum treatment method of the present invention, the filter includes a frame and a driving roller and a driven roller installed at both ends of the frame, a tape is provided between the driving roller and the driven roller, the outer wall of the tape is provided with a filter cloth, and a plurality of redirecting rollers for setting the transmission direction are provided in the filter cloth, wherein a vacuum box is provided under the tape and is sealed and connected to both sides of the tape.

[0023] As a preferred solution of the wet desulfurization gypsum treatment method of the present invention, the distributor, the first rinsing component, the first filter cake loosening component, the second rinsing component, the second filter cake loosening component and the unloading component are arranged in sequence on the upper surface of the filter along the processing direction of the sulfur gypsum slurry, and the collection trough is arranged directly below the unloading component.

[0024] As a preferred embodiment of the wet desulfurization gypsum treatment method of the present invention, the first rinsing component and the second rinsing component both include a support frame installed on the frame, and a cleaning baffle installed on the support frame, a rinsing pipe is provided inside the cleaning baffle, and a water inlet pipe and an external plug-in nozzle are provided above the rinsing pipe.

[0025] As a preferred solution of the wet desulfurization gypsum treatment method of the present invention, the first filter cake loosening component and the second filter cake loosening component each include two legs installed on the side of the frame, a cross frame spanning the tape is provided between the two legs, and a plurality of rake frames are provided on the cross frame at equal intervals.

[0026] As a preferred solution of the wet desulfurization gypsum treatment method of the present invention, the front end of each rake frame is provided with rake teeth, the front end of the rake teeth is triangular, and the bottom of the rake teeth is 1-2CM away from the filter cloth.

[0027] As a preferred solution of the wet desulfurization gypsum treatment method described in the present invention, the support legs are fixed to the cross frame by an adjusting member, wherein the adjusting member includes a long plate with a strip hole on the surface, and a through hole is provided on the side of the support legs. The long plate is fixed at the through hole by bolts passing through the strip hole. A limiting column is provided above the long plate, and a limiting hole is provided on the cross frame. The limiting column passes through the limiting hole and is fixed to the limiting plate in the limiting hole. A spring is provided on the outer wall of the limiting column, and the spring is located between the long plate and the cross frame.

[0028] As a preferred solution of the wet desulfurization gypsum treatment method of the present invention, the aggregate trough includes a trough body installed on the side of the frame, the trough body is arranged in an inverted trapezoidal shape, and an elastic base is arranged at the bottom of the trough body, and a vibrator is arranged above the trough body.

[0029] As a preferred solution of the wet desulfurization gypsum treatment method of the present invention, four main air pipes are arranged at the four edges of the outer wall of the trough body, and a plurality of horizontally arranged branch pipes are arranged between two adjacent main air pipes, and a plurality of air holes are distributed on the branch pipes, and a wedge block is arranged between two adjacent branch pipes along the inner wall of the trough body, and the tip of the wedge block faces upward.

[0030] The beneficial effects of the present invention are as follows: by adding multiple sets of adjacent rinsing components and filter cake loosening components to the vacuum filter, the sulfur gypsum slurry containing oil and fat can be effectively separated from the solid and liquid, so that the moisture content of the dry material after solid-liquid separation is low, meeting the emission requirements, wherein the cooperation between the filter cake loosening device and the rinsing component can effectively remove moisture and break the oil film, and can also be adjusted in height to ensure the depth of the ventilation groove from the surface of the filter cloth, thereby achieving the breaking of the oil film while avoiding air leakage, and avoiding the poor solid-liquid separation effect caused by the closure of the oil film. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] FIG1 is a schematic diagram of the overall process of the wet desulfurization gypsum treatment method of the present invention.

[0033] FIG2 is a front view structural diagram of the first filter cake loosening component in the present invention.

[0034] FIG3 is a side view of the first filter cake loosening component of the present invention.

[0035] FIG4 is a schematic diagram of the overall structure of the aggregate trough in the present invention.

[0036] FIG5 is a schematic diagram of the cross-sectional structure of the aggregate trough in the present invention.

[0037] FIG6 is an enlarged schematic diagram of the structure at point A in FIG5 .

[0038] FIG7 is a schematic diagram of the front view structure of the first rinsing component in the present invention.

[0039] In the figure: 100, filter; 101, frame; 102, driving roller; 103, driven roller; 104, adhesive belt; 105, filter cloth; 106, redirecting roller; 107, vacuum box; 200, distributor; 300, first rinsing component; 301, support frame; 302, cleaning baffle; 303, rinsing pipe; 304, water inlet pipe; 305, external plug-in nozzle; 400, first filter cake loosening component; 401, support leg; 401a, through hole; 402, cross frame; 402a, limiting hole; 402b, limiting plate; 403, rake frame; 404, rake teeth; 405, adjustment member; 405a, long plate; 405b, strip hole; 405c, bolt; 405e, limiting column; 405g, spring; 500, second rinsing component; 600, second filter cake loosening component; 700, unloading component; 800, collecting trough; 801, trough body; 802, elastic base; 803, vibrator; 804, main air pipe; 805, branch pipe; 806, air hole; 807, wedge block. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0043] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0044] Example 1

[0045] 1 to 7 , a first embodiment of the present invention provides a wet desulfurization gypsum treatment method. The sulfur gypsum slurry enters the distributor 200 of the filter 100 from the gypsum cyclone. The distributor 200 arranges the sulfur gypsum slurry on the surface of the filter cloth 105 of the filter 100. The filter 100 drives the sulfur gypsum slurry to move to the first rinsing component 300. The first rinsing component 300 is used to remove water-soluble substances and grease in the sulfur gypsum slurry. The filter 100 drives the sulfur gypsum slurry to move to the first filter cake loosening component 400. The first filter cake loosening component 400 is used to plow a number of grooves on the surface of the filter cake formed by the sulfur gypsum slurry to increase the air flow. The filter 100 increases the contact area between the filter body and the filter cake, removing moisture from the filter cake. The filter 100 drives the sulfur-gypsum slurry to the second rinsing unit 500, which plows grooves on the filter cake surface to further remove water-soluble substances and grease from the sulphur-gypsum slurry. The filter 100 drives the sulphur-gypsum slurry to the second filter cake loosening unit 600, which is used to break up the oil film formed in the grooves on the filter cake surface in the previous step. The filter 100 drives the sulphur-gypsum slurry to the discharge unit 700, which uses a scraper to separate the filter cake from the filter 100 and drop it into the collection trough 800. The filter 100 drives the sulphur-gypsum slurry in a step-by-step operation and vacuumizes the sulphur-gypsum slurry to gradually dehydrate it.

[0046] The filter 100 comprises a frame 101, a drive roller 102, and a driven roller 103 mounted at either end of the frame 101. A tape 104 is sleeved between the drive roller 102 and the driven roller 103. A filter cloth 105 is sleeved around the outer wall of the tape 104, and multiple redirecting rollers 106 are positioned within the filter cloth 105 to control its transmission direction. A vacuum box 107 is positioned below the tape 104 and is sealed and connected to both sides. A distributor 200, a first rinse unit 300, a first filter cake loosening unit 400, a second rinse unit 500, a second filter cake loosening unit 600, and a discharge unit 700 are positioned on the top surface of the filter 100, sequentially along the processing direction of the sulfur-gypsum slurry. The discharge unit 700 is located directly below the collection trough 800.

[0047] An annular filter cloth 105 with a skirt is used to prevent liquid from escaping from both sides. The skirt is a combined structure: a corrugated skirt bonded to a parallel adhesive tape 104. The vacuum box 107 has a V-shaped cross-section and is made of corrosion-resistant material. During operation of the filter 100, the vacuum box 107 is stationary while the adhesive tape 104 runs above it. The vacuum box 107 is connected in sections, each section having a nozzle connected to the main liquid collection pipe, forming a vacuum liquid collection system. When the dried filter cake on the filter cloth 105 reaches the discharge unit 700, its increased curvature (decreasing radius of curvature) makes it easier to peel off the filter cloth 105. A thin plate or steel wire is then used to remove the filter cake for discharge.

[0048] First, the sulfur gypsum slurry enters the distributor 200 of the filter 100 through the gypsum cyclone. The distributor 200 evenly distributes the sulfur gypsum slurry on the filter cloth 105 of the filter 100, and the vacuum box 107 located below the filter cloth 105 is vacuumed to form a filter cake. Subsequently, the operation of the filter 100 drives the sulfur gypsum slurry to move to the first rinsing component 300. The first rinsing component 300 performs the first rinse on the filter cake to remove soluble substances or grease. Then, the filter cake moves to the first filter cake loosening component 400. The first filter cake loosening component 400 cultivates a number of ventilation grooves on the surface of the filter cake. The contact area between the gas and the filter cake is increased, and the moisture in the filter cake is removed. Then, the filter cake moves to the second rinsing component 500, which rinses the filter cake again to further remove soluble substances and grease in the ventilation groove. Next, the filter cake moves to the second filter cake loosening component 600, which breaks the oil film formed on the filter cake surface and the ventilation groove surface by the second rinsing component 500, ensuring the vacuum and dehydration effect. Finally, the filter cake moves to the unloading component 700 to separate the pure sulfur gypsum filter cake from the filter 100 and drop it into the collection trough 800. The collection trough 800 has wedge blocks 807 and air holes 806, which can form an air film on the inner surface of the trough body 801 to prevent the adhesion of sticky materials and prevent material accumulation. It also has a vibrator 803 to shake off the sticky materials in the collection trough 800, further preventing material accumulation.

[0049] In this embodiment, multiple sets of rinsing components and filter cake loosening components that are adjacent to each other in the process are added to the original vacuum filter 100. The rinsing components are used to remove water-soluble substances or grease in the sulfur gypsum slurry, and the filter cake loosening components are used to plow a number of ventilation grooves on the surface of the filter cake formed by the sulfur gypsum slurry, thereby increasing the contact area between the gas and the filter cake and taking away the moisture in the filter cake. Therefore, the cooperation between the two can effectively remove moisture and break the oil film. The height can also be adjusted to ensure the depth of the ventilation groove from the surface of the filter cloth 105, thereby achieving the oil film breaking while avoiding air leakage and avoiding the poor solid-liquid separation effect caused by the closure of the oil film. Therefore, the improvement of this application can effectively separate the solid and liquid of the sulfur gypsum slurry containing grease, so that the moisture content of the dry material after solid-liquid separation is low, meeting the emission requirements.

[0050] Example 2

[0051] Referring to Figures 2, 3, and 7, a second embodiment of the present invention is shown. This embodiment differs from the first embodiment in that both the first and second rinsing components 300 and 500 include a support frame 301 mounted on the frame 101 and a cleaning baffle 302 mounted on the support frame 301. A rinsing pipe 303 is disposed within the cleaning baffle 302, and a water inlet pipe 304 and an external plug-in nozzle 305 are located above the rinsing pipe 303. Each first and second filter cake loosening component 400 and 600 includes two legs 401 mounted on the side of the frame 101. A crossbar 402 is disposed between the legs 401, spanning the adhesive tape 104. Multiple rakes 403 are evenly spaced on the crossbar 402. Each rake 403 has triangular tines 404 at its front end, with the bottom of the tines 404 positioned 1-2 cm from the filter cloth 105.

[0052] It should be noted that by connecting the external water pipe to the external plug-in nozzle 305 and then injecting water into the water inlet pipe 304, the water is diverted along the water inlet pipe 304 to the rinsing pipe 303, and is sprayed out from the multiple jet holes opened on the rinsing pipe 303 to rinse the filter cake on the filter cloth 105 below, thereby removing the water-soluble substances in the filter cake formed by the sulfur gypsum slurry or the grease floating on the surface of the filter cake formed by the sulfur gypsum slurry.

[0053] It should be noted that the rake teeth 404 are fixedly connected to the cross frame 402 via the rake frame 403. There are a number of rake teeth 404 along the width of the filter step, and the spacing between them is determined based on the width of the filter 100 and the oil film on the filter cake formed by the sulfur-gypsum slurry. The thicker the oil film, the more difficult it is to filter, and the more rake teeth 404 there are, and the smaller the spacing. The triangular ends of the rake teeth 404 enable quick and easy raking of ventilation grooves in the filter cake. Furthermore, the triangular shape of the rake teeth 404 prevents the filter cake at the bottom of the ventilation grooves from being damaged and causing air leakage.

[0054] Among them, the setting of the rake teeth 404 at a distance of 1-2CM from the surface of the filter cloth 105 is mainly due to the following considerations: Dehydration effect: If the ventilation groove is too shallow from the surface of the filter cloth 105, less than 1CM, the filter cake will be too thick, the solid-liquid separation effect will be poor, the water discharge will be blocked, and the dehydration effect will be affected. At this time, the water in the filter cake may not be fully sucked away by the vacuum, resulting in a decrease in the dehydration effect, and the formed sulfur gypsum dry material cannot meet the discharge requirements. Influence of vacuum degree: If the ventilation groove is too deep from the surface of the filter cloth 105, greater than 2CM, it will make it difficult for the air in the filter cake to be extracted, causing air leakage, and the vacuum degree of the filter 100 to decrease. At this time, insufficient vacuum will affect the solid-liquid separation effect, making it impossible for some water to be effectively sucked out of the filter cake. In the process of sulfur gypsum dehydration, setting the ventilation groove within the range of 1-2CM from the surface of the filter cloth 105 can achieve a better solid-liquid separation effect. Compared with other distances, experience and practice have shown that the 1-2CM setting can take into account both the dehydration effect and the vacuum degree, and allow the solid components of the filter cake to be discharged as much as possible to meet the discharge requirements.

[0055] The support leg 401 and the cross frame 402 are fixed by an adjusting piece 405, wherein the adjusting piece 405 includes a long plate 405a with a strip hole 405b on the surface, and a through hole 401a is provided on the side of the support leg 401. The long plate 405a is fixed to the through hole 401a by a bolt 405c passing through the strip hole 405b. A limiting column 405e is provided above the long plate 405a, and a limiting hole 402a is provided on the cross frame 402. The limiting column 405e passes through the limiting hole 402a and is fixed to the limiting plate 402b in the limiting hole 402a. A spring 405g is provided on the outer wall of the limiting column 405e, and the spring 405g is located between the long plate 405a and the cross frame 402.

[0056] It should be noted that in order to adjust the height of the rake teeth 404 to 1-2CM from the surface of the filter cloth 105, the adjustment member 405 can be used to adjust and set it. Specifically, since a strip hole 405b is provided on the long plate 405a and a through hole 401a is provided on the support leg 401, the height can be adjusted by moving the position where the strip hole 405b is aligned with the through hole 401a up and down. Subsequently, the strip hole 405b and the through hole 401a are fixed by bolts 405c to achieve the setting of the height of the long plate 405a on the support leg 401, and then the height of the cross frame 402 on the long plate 405a is set. The long plate 405a is fixed to the limiting plate 402b arranged in the cross frame 402 through the limiting column 405e at the upper end, thereby achieving fixation between the long plate 405a and the cross frame 402, wherein a spring 405g is arranged between the long plate 405a and the cross frame 402 and is sleeved on the limiting column 405e, thereby preventing the vibration generated by the filter 100 during operation from being transmitted to the cross frame 402, and finally being transmitted from the rake frame 403 and rake teeth 404 of the cross frame 402 to the filter cake, causing damage to the filter cake.

[0057] The remaining structures are the same as those of Example 1.

[0058] Example 3

[0059] 4 to 6 , which are the third embodiment of the present invention, this embodiment differs from the second embodiment in that: the aggregate trough 800 includes a trough body 801 mounted on the side of the frame 101, the trough body 801 being arranged in an inverted trapezoidal shape, and an elastic base 802 being arranged at the bottom of the trough body 801, and a vibrator 803 being arranged above the trough body 801. Four main air pipes 804 are arranged at the four edges of the outer wall of the trough body 801, and a plurality of horizontally arranged branch pipes 805 are arranged between two adjacent main air pipes 804, with a plurality of air holes 806 distributed on the branch pipes 805. A wedge block 807 is arranged between two adjacent branch pipes 805 along the inner wall of the trough body 801, with the tip of the wedge block 807 facing upward.

[0060] It should be noted that the aggregate trough 800 is set to an inverted trapezoid with a large opening on the top and a small opening on the bottom, so that it is convenient to collect and gather the filter cake scraped off by the unloading component 700 and then lower it. A vibrator 803 is installed on the top of the aggregate trough 800, and an elastic base 802 is installed on the bottom. When the vibrator 803 is started, the aggregate trough 800 is vibrated with the cooperation of the elastic base 802, so that the filter cake that may adhere to the wall of the aggregate trough 800 is vibrated and cleaned, which also increases the difficulty of the filter cake adhering to the wall of the aggregate trough 800 and avoids the adhesion of the filter cake.

[0061] Furthermore, air pipes are arranged around the trough body 801 of the aggregate trough 800, including main air pipes 804 arranged at the four corner edges, and multiple branch pipes 805 distributed horizontally on each side. The two ends of the branch pipes 805 are connected to the two main air pipes 804 on both sides, so that air is injected into each branch pipe 805 through the main air pipe 804. Each branch pipe 805 is provided with multiple air holes 806, and the air holes 806 are connected to the inner wall of the trough body 801. The wedge blocks 807 arranged above the air holes 806 of each straight pipe on the inner wall of the trough body 801 form an air film, thereby preventing the filter cake from adhering to the inner wall of the trough body 801. The wedge blocks 807 are tilted downward and the tips are upward. Multiple groups of wedge blocks 807 are distributed in sequence along the height direction, forming an overall effect similar to shark skin. The air film can be formed on the inner wall of the trough body 801 in conjunction with air jets, and the friction when the filter cake adheres can also be reduced to prevent the filter cake from adhering.

[0062] The remaining structures are the same as those of Example 2.

[0063] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structures. Other replacements, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0064] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A wet desulfurization gypsum treatment method, characterized in that: including The sulfur gypsum slurry enters from the gypsum cyclone through the distributor of the filter press; The filter press operates to move the sulfur gypsum slurry to the first rinsing component; The filter press operates to move the sulfur gypsum slurry to the first filter cake loosening component; The filter press operates to move the sulfur gypsum slurry to the second rinsing component; The filter press operates to move the sulfur gypsum slurry to the second filter cake loosening component; The filter press operates to move the sulfur gypsum slurry to the discharging component.

2. The wet desulfurization gypsum treatment method according to claim 1, characterized in that: wherein: The filter press (100) is used to drive the sulfur gypsum slurry to move for step-by-step operations, and perform vacuum treatment on the sulfur gypsum slurry to gradually dehydrate it; The distributor (200) arranges the sulfur gypsum slurry on the filter cloth surface of the filter press; The first rinsing component (300) is used to remove water-soluble substances and grease in the sulfur gypsum slurry; The first filter cake loosening component (400) is used to plow a number of grooves on the surface of the filter cake formed by the sulfur gypsum slurry, increase the contact area between the gas and the filter cake, and take away the moisture in the filter cake; The second rinsing component (500) further removes water-soluble substances and grease in the sulfur gypsum slurry by plowing a number of grooves on the filter cake surface; The second filter cake loosening component (600) is used to break the oil film formed in a number of grooves on the filter cake surface in the previous step; The discharging component (700) separates the filter cake from the filter press through a scraper and makes it fall into the aggregate tank (800).

3. The wet desulfurization gypsum treatment method according to claim 2, characterized in that: The filter press (100) includes a frame (101), a driving roller (102) and a driven roller (103) installed at both ends of the frame (101). A tape (104) is sleeved between the driving roller (102) and the driven roller (103). A filter cloth (105) is sleeved on the outer wall of the tape (104), and a number of redirecting rollers (106) for setting its transmission direction are arranged inside the filter cloth (105). A vacuum box (107) is arranged below the tape (104) and is sealed and communicated with both sides thereof.

4. The wet desulfurization gypsum treatment method according to claim 3, characterized in that: On the upper surface of the filter press (100), the distributor (200), the first rinsing component (300), the first filter cake loosening component (400), the second rinsing component (500), the second filter cake loosening component (600) and the discharging component (700) are sequentially arranged along the processing direction of the sulfur gypsum slurry, and the aggregate tank (800) is arranged directly below the discharging component (700).

5. The wet desulfurized gypsum treatment method according to claim 4, characterized in that: Both the first rinsing component (300) and the second rinsing component (500) include a support frame (301) installed on the frame (101), and a cleaning baffle (302) installed on the support frame (301). A rinsing pipe (303) is arranged inside the cleaning baffle (302), and a water inlet pipe (304) and an externally inserted nozzle (305) are arranged above the rinsing pipe (303).

6. The wet desulfurized gypsum treatment method according to claim 4, wherein: Both the first filter cake loosening member (400) and the second filter cake loosening member (600) include two legs (401) installed on the side of the frame (101). A cross-frame (402) spanning the tape (104) is arranged between the two legs (401), and a plurality of rake frames (403) are equidistantly arranged on the cross-frame (402).

7. The wet desulfurization gypsum treatment method according to claim 6, wherein: The front end of each rake frame (403) is provided with rake teeth (404). The front end of the rake teeth (404) is triangular, and the bottom of the rake teeth (404) is 1-2 cm away from the filter cloth (105).

8. The wet desulfurized gypsum treatment method according to claim 6 or 7, characterized in that: The leg (401) and the cross-frame (402) are fixed by an adjusting member (405). The adjusting member (405) includes a long plate (405a) with a strip-shaped hole (405b) formed on its surface. A through hole (401a) is formed on the side of the leg (401). The long plate (405a) is fixed at the through hole (401a) by a bolt (405c) passing through the strip-shaped hole (405b). A limit post (405e) is arranged above the long plate (405a). A limit hole (402a) is formed on the cross-frame (402). The limit post (405e) passes through the limit hole (402a) and is fixed to a limit plate (402b) in the limit hole (402a). A spring (405g) is sleeved on the outer wall of the limit post (405e), and the spring (405g) is located between the long plate (405a) and the cross-frame (402).

9. The wet desulfurization gypsum treatment method according to any one of claims 4-6, characterized in that: The aggregate chute (800) includes a chute body (801) installed on the side of the frame (101). The chute body (801) is arranged in an inverted trapezoid shape, and an elastic base (802) is arranged at the bottom of the chute body (801). A vibrator (803) is arranged above the chute body (801).

10. The wet desulfurization gypsum treatment method according to claim 9, characterized in that: Four main air pipes (804) are arranged at the four edges of the outer side wall of the chute body (801), and a plurality of horizontally arranged branch pipes (805) are arranged between two adjacent main air pipes (804). A number of air holes (806) are distributed on the branch pipes (805). Wedge-shaped blocks (807) with their tips upward are arranged between two adjacent branch pipes (805) along the inner wall of the chute body (801).

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