Desulfurization wastewater treatment system and method

Abstract

The invention discloses a desulfurization wastewater treatment system and method. The desulfurization wastewater treatment system comprises a rotational flow system, a wastewater reaction device and a clarification device, an inlet of the cyclone system is connected with the absorption tower; the cyclone system is provided with a solid slurry port; the wastewater reaction device is provided with a wastewater inlet and a wastewater outlet; the wastewater inlet is connected with the outlet of the cyclone system; an inlet of the clarification device is connected with the wastewater outlet, and the clarification device is provided with a sludge outlet, a qualified water outlet and an unqualified water outlet; and at least one of the solid slurry port and the unqualified water outlet is connected to the absorption tower. According to the desulfurization wastewater treatment system disclosed by the embodiment of the invention, the desulfurization wastewater is pretreated through the rotational flow system, and solid particles such as gypsum in the desulfurization wastewater can be separated, so that the probability of pipeline and equipment blockage caused by the solid particles is reduced, and the stability and reliability of the desulfurization wastewater treatment system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a desulfurization wastewater treatment system and method. Background Art

[0002] The limestone-gypsum wet flue gas desulfurization process is a flue gas desulfurization technology widely used in coal-fired facilities such as thermal power plants. The process mixes limestone and water to make limestone slurry, and then passes the flue gas into an absorption tower filled with limestone slurry. The calcium hydroxide in the limestone reacts with sulfur dioxide in the flue gas to form calcium sulfate, thereby achieving the purpose of desulfurization.

[0003] The desulfurization wastewater generated by the limestone-gypsum wet desulfurization process needs to be treated by the wastewater treatment system before being discharged. In the relevant technology, the desulfurization wastewater treatment process includes the steps of screen treatment, neutralization, sedimentation, flocculation, clarification, etc. After treatment, the sludge is discharged with the sludge pump, and the clean water is discharged after testing. In the above-mentioned desulfurization wastewater treatment process, the screen treatment is a pretreatment, which is mainly to remove large solid impurities in the wastewater, but it cannot remove fixed particles in the desulfurization wastewater. When the content of solid particles in the desulfurization wastewater is high, it is easy to cause pipes and equipment to be blocked, affecting the stability and reliability of the system. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a desulfurization wastewater treatment system, which pre-treats the desulfurization wastewater through a cyclone system, and can separate solid particles such as gypsum in the desulfurization wastewater, thereby reducing the probability of solid particles causing blockage of pipelines and equipment, and improving the stability and reliability of the desulfurization wastewater treatment system.

[0006] The desulfurization wastewater treatment system of the embodiment of the present invention includes a cyclone system, a wastewater reaction device and a clarification device; the inlet of the cyclone system is used to connect to an absorption tower, and the cyclone system has a solid slurry port; the wastewater reaction device has a wastewater inlet and a wastewater outlet, and the wastewater inlet is connected to the outlet of the cyclone system; the inlet of the clarification device is connected to the wastewater outlet, and the clarification device has a sludge outlet, a qualified water outlet and an unqualified water outlet; wherein at least one of the solid slurry port and the unqualified water outlet is connected to the absorption tower.

[0007] In some embodiments, the cyclone system includes a first cyclone device and a second cyclone device; the inlet of the first cyclone device is used to connect to an absorption tower, and the first cyclone device has a first top flow port and a first bottom flow port; the second cyclone device has a second top flow port and a second bottom flow port, and the inlet of the second cyclone device is connected to the first top flow port; wherein the second top flow port forms the outlet of the cyclone system, and the first bottom flow port and the second bottom flow port form the solid slurry port.

[0008] In some embodiments, the desulfurization wastewater treatment system also includes a dewatering belt, which is arranged on the lower side of the first cyclone device so that the solid slurry discharged from the first bottom flow outlet falls into the upper side of the dewatering belt, and the dewatering belt has a solid discharge end and a liquid discharge end.

[0009] In some embodiments, the clarification device includes a clarifier and a clean water tank, the inlet of the clarifier is connected to the wastewater outlet, the clarifier has the sludge outlet and the clean water outlet, the clean water tank is connected to the clean water outlet, and the clean water tank has the qualified water outlet and the unqualified water outlet.

[0010] In some embodiments, a water quality detector is provided in the clean water tank.

[0011] In some embodiments, the desulfurization wastewater treatment system also includes a reflux water tank, the outlet of which is connected to the absorption tower, and at least one of the liquid discharge end, the second bottom flow outlet, and the unqualified water outlet is connected to the inlet of the reflux water tank.

[0012] In some embodiments, the wastewater reaction device comprises a neutralization tank, a sedimentation tank and a flocculation tank connected in sequence, the neutralization tank has the wastewater inlet, and the flocculation tank has the wastewater outlet.

[0013] In some embodiments, the cyclone system further includes a first wastewater tank, an inlet of the first wastewater tank is connected to the first top flow port, and an outlet of the first wastewater tank is connected to an inlet of the second cyclone device.

[0014] In some embodiments, the cyclone system further includes a second wastewater tank, an inlet of the second wastewater tank is connected to the second top flow port, and an outlet of the second wastewater tank is connected to the wastewater inlet.

[0015] The desulfurization wastewater treatment method of the embodiment of the present invention adopts the desulfurization wastewater treatment system described in any of the above embodiments, and the desulfurization wastewater treatment method comprises the following steps:

[0016] transporting the desulfurized wastewater in the absorption tower to the cyclone system;

[0017] The desulfurization wastewater is separated by the cyclone system to form a solid slurry and wastewater to be treated, the solid slurry is discharged from the solid slurry port, and the wastewater to be treated is transported to the wastewater reaction device from the outlet of the cyclone system;

[0018] Using the wastewater reaction device to perform chemical reaction treatment on the wastewater to be treated to form solid-liquid mixed wastewater, and transporting the solid-liquid mixed wastewater to the clarification device;

[0019] The solid-liquid mixed wastewater is subjected to solid-liquid separation by using the clarification device to form sludge and filtrate clear water, and the sludge is discharged from the sludge outlet;

[0020] The filtrate clean water is tested based on the emission standard. If the filtrate clean water meets the emission standard, the filtrate clean water is discharged through the qualified water outlet. If the filtrate clean water does not meet the emission standard, the filtrate clean water is discharged through the unqualified water outlet.

[0021] The desulfurization wastewater treatment system of the embodiment of the present invention first pre-treats the desulfurization wastewater through a cyclone system before subjecting the desulfurization wastewater to chemical reaction treatment, so as to separate solid particles such as gypsum in the desulfurization wastewater. Compared with the method of using a grid treatment to filter solid impurities in the related art, the probability of solid particles causing blockage of pipelines and equipment can be reduced, thereby improving the stability and reliability of the desulfurization wastewater treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a desulfurization wastewater treatment system according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 100. Desulfurization wastewater treatment system;

[0025] 11. first cyclone device; 111. first top flow port; 112. first bottom flow port; 12. second cyclone device; 121. second top flow port; 122. second bottom flow port; 13. first waste water tank; 14. second waste water tank;

[0026] 2. Wastewater reaction device; 21. Neutralization tank; 211. Wastewater inlet; 22. Sedimentation tank; 23. Flocculation tank; 231. Wastewater outlet;

[0027] 3. Clarifying device; 31. Clarifier; 311. Sludge outlet; 32. Clean water tank; 321. Qualified water outlet; 322. Unqualified water outlet;

[0028] 4. Dewatering belt; 41. Solid discharge end; 42. Liquid discharge end;

[0029] 5. Return water tank;

[0030] 200. Absorption tower. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figure 1 As shown, the desulfurization wastewater treatment system 100 of the embodiment of the present invention includes a cyclone system, a wastewater reaction device 2 and a clarification device 3; the inlet of the cyclone system is used to connect to the absorption tower 200, and the cyclone system has a solid slurry port; the wastewater reaction device 2 has a wastewater inlet 211 and a wastewater outlet 231, and the wastewater inlet 211 is connected to the outlet of the cyclone system; the inlet of the clarification device 3 is connected to the wastewater outlet 231, and the clarification device 3 has a sludge outlet 311, a qualified water outlet 321 and an unqualified water outlet 322; wherein, at least one of the solid slurry port and the unqualified water outlet 322 is connected to the absorption tower 200.

[0033] In the desulfurization wastewater treatment system 100 of the embodiment of the present invention, the desulfurization wastewater in the absorption tower 200 is transported to the cyclone system, and the solid-liquid separation of the desulfurization wastewater is achieved through the cyclone system to form a solid slurry and wastewater to be treated. The solid slurry is discharged from the solid slurry port, and the wastewater to be treated is transported to the wastewater reaction device 2 from the outlet of the cyclone system; then the wastewater to be treated undergoes a chemical reaction in the wastewater reaction device 2 to form a solid-liquid mixed wastewater, and the solid-liquid mixed wastewater is transported to the clarification device 3, and the solid-liquid separation of the solid-liquid mixed wastewater is achieved by the clarification device 3 to form sludge and filtrate clean water, and the sludge is discharged from the sludge outlet 311 for further treatment; then the filtrate clean water is tested, and if the filtrate clean water meets the discharge standard, the filtrate clean water is discharged through the qualified water outlet 321, and if the filtrate clean water does not meet the discharge standard, the filtrate clean water is discharged through the unqualified water outlet 322.

[0034] The desulfurization wastewater treatment system 100 of the embodiment of the present invention first pre-treats the desulfurization wastewater through a cyclone system before subjecting the desulfurization wastewater to chemical reaction treatment, thereby achieving solid-liquid separation of the desulfurization wastewater and separating solid particles from the desulfurization wastewater. Compared with the method of using a grid treatment to filter solid impurities in the related art, the probability of solid particles causing blockage of pipelines and equipment can be reduced, thereby improving the stability and reliability of the desulfurization wastewater treatment system 100.

[0035] In addition, the solid slurry port and the unqualified water outlet 322 are connected to the absorption tower 200, and the solid slurry discharged from the solid slurry port and the unqualified water discharged from the clarification device 3 can flow back to the absorption tower 200 and enter the treatment system again with the desulfurization wastewater in the absorption tower 200, thereby improving the treatment efficiency of the desulfurization wastewater.

[0036] It can be understood that the solid particles in the desulfurization wastewater discharged from the absorption tower 200 are mainly gypsum. After the desulfurization wastewater passes through the cyclone system, the solid slurry containing a large amount of gypsum is discharged from the solid slurry port, and the wastewater to be treated is discharged into the wastewater reaction device 2 for further treatment. In addition, the separated gypsum can be recycled and reused to improve the recycling efficiency of the desulfurization wastewater treatment system 100.

[0037] In other embodiments, a grid may be provided upstream of the cyclone system to remove large solid impurities in the desulfurization wastewater first, which is more conducive to the solid-liquid separation work of the cyclone system and achieves a better solid-liquid separation effect.

[0038] In some embodiments, Figure 1 As shown, the cyclone system includes a first cyclone device 11 and a second cyclone device 12; the inlet of the first cyclone device 11 is used to connect to the absorption tower 200, and the first cyclone device 11 has a first top flow port 111 and a first bottom flow port 112; the second cyclone device 12 has a second top flow port 121 and a second bottom flow port 122, and the inlet of the second cyclone device 12 is connected to the first top flow port 111; wherein the second top flow port 121 forms the outlet of the above-mentioned cyclone system, and the first bottom flow port 112 and the second bottom flow port 122 form a solid slurry port.

[0039] The desulfurization wastewater in the absorption tower 200 is transported to the first cyclone device 11. After passing through the first cyclone device 11, solid particles with higher density (such as gypsum particles) in the desulfurization wastewater are separated and discharged from the first bottom flow port 112 in the form of gypsum slurry. The particles with lower density form primary wastewater with the remaining water and enter the second cyclone device 12 from the first top flow port 111; the second cyclone device 12 can further remove the particles with lower density in the primary wastewater, and perform solid-liquid separation on the primary wastewater again to form particle slurry and secondary wastewater. The secondary wastewater is discharged from the second top flow port 121, and the slurry containing fine particles is discharged from the second bottom flow port 122 and enters the subsequent wastewater treatment system.

[0040] In this way, solid particles such as gypsum and suspended matter in the desulfurization wastewater can be separated more thoroughly, reducing the risk of blockage of pipes and equipment in the desulfurization wastewater treatment system 100; at the same time, the gypsum particles discharged from the first bottom flow port 112 and the second bottom flow port 122 can be recycled and reused, thereby improving the recovery efficiency of gypsum.

[0041] Optionally, the first cyclone device 11 is a gypsum cyclone, and the second cyclone device 12 is a wastewater cyclone.

[0042] It can be understood that the desulfurization wastewater treatment system 100 includes a plurality of pumps to transport desulfurization wastewater and primary wastewater and secondary wastewater after solid-liquid separation.

[0043] For example, a gypsum discharge pump is provided between the absorption tower 200 and the first cyclone device 11, and the gypsum discharge pump can be used to transport the desulfurization wastewater in the absorption tower 200 to the first cyclone device 11; a feeding pump is provided upstream of the second cyclone device 12, and the feeding pump can be used to transport the primary wastewater to the second cyclone device 12; a sludge discharge pump is provided at the sludge outlet 311 of the clarification device 3, and the sludge separated in the clarification device 3 can be discharged by the sludge discharge pump.

[0044] In some embodiments, Figure 1 As shown, the desulfurization wastewater treatment system 100 also includes a dewatering belt 4, which is arranged on the lower side of the first cyclone device 11 so that the solid slurry discharged from the first bottom flow outlet 112 falls into the upper side of the dewatering belt 4, and the dewatering belt 4 has a solid discharge end 41 and a liquid discharge end 42.

[0045] The gypsum slurry containing a large amount of gypsum particles is discharged from the first bottom flow outlet 112 to the dehydration belt 4, and is dehydrated by the dehydration belt 4 to form a gypsum filter cake. The gypsum filter cake is discharged through the solid discharge end 41 for recycling and reuse, and the removed water is discharged through the liquid discharge end 42 and refluxes to the absorption tower 200, and enters the desulfurization wastewater treatment system 100 again with the desulfurization wastewater in the absorption tower 200, which can improve the treatment efficiency of the desulfurization wastewater.

[0046] In some embodiments, Figure 1 As shown, the clarification device 3 includes a clarifier 31 and a clean water tank 32. The inlet of the clarifier 31 is connected to the wastewater outlet 231. The clarifier 31 has a sludge outlet 311 and a clean water outlet. The clean water tank 32 is connected to the clean water outlet. The clean water tank 32 has the above-mentioned qualified water outlet 321 and unqualified water outlet 322.

[0047] The solid-liquid mixed wastewater treated by the wastewater reaction device 2 enters the clarifier 31, and solid-liquid separation is achieved through the clarifier 31. The sludge in the lower layer is discharged from the sludge outlet 311, and the filtrate and clean water in the upper layer enters the clean water tank 32 for temporary storage. The clean water in the clean water tank 32 can then be tested for water quality. If the filtrate and clean water in the clean water tank 32 meet the discharge standards, it will be directly discharged. If it does not meet the discharge standards, the filtrate and clean water in the clean water tank 32 will be returned to the absorption tower 200.

[0048] In some embodiments, a water quality detector is provided in the clean water tank 32 .

[0049] By setting up a water quality detector, the clean water in the clean water tank 32 can be automatically detected, thereby improving the degree of automation of the desulfurization wastewater treatment system 100, thereby achieving automatic discharge of qualified water or automatic return of unqualified water.

[0050] In some embodiments, the desulfurization wastewater treatment system 100 also includes a reflux water tank 5, the outlet of the reflux water tank 5 is connected to the absorption tower 200, and at least one of the liquid discharge end 42, the second bottom flow outlet 122, and the unqualified water outlet 322 is connected to the inlet of the reflux water tank 5.

[0051] The filtrate that needs to be refluxed in each treatment stage of the desulfurization wastewater treatment system 100 can be collected in the reflux water tank 5 and then uniformly refluxed to the absorption tower 200. By setting the reflux water tank 5, a buffer space can be provided for the filtrate reflux.

[0052] Optionally, the liquid discharge end 42 of the dehydration belt 4 , the second bottom flow outlet 122 of the second cyclone device 12 , and the unqualified water outlet 322 of the clean water tank 32 are all connected to the return water tank 5 .

[0053] In some embodiments, Figure 1 As shown, the wastewater reaction device 2 includes a neutralization tank 21 , a sedimentation tank 22 and a flocculation tank 23 which are connected in sequence. The neutralization tank 21 has a wastewater inlet 211 , and the flocculation tank 23 has a wastewater outlet 231 .

[0054] The secondary wastewater enters the neutralization tank 21, and adding alkaline substances (such as lime) into the neutralization tank 21 can adjust the pH value of the secondary wastewater, so that the acidic substances in the secondary wastewater are neutralized; then the wastewater enters the sedimentation tank 22, and adding chemical agents (such as lime milk) into the sedimentation tank 22 can form precipitates from heavy metal ions and part of the suspended matter in the wastewater; by adding flocculants into the flocculation tank 23, small particles in the wastewater can be aggregated into larger flocs, which is more conducive to the clarification operation of the wastewater in the clarification device 3; thus, after the secondary wastewater is treated by three steps of neutralization, sedimentation and flocculation, pollutants such as heavy metal ions and suspended matter are effectively removed, thereby reducing the pollutant content in the wastewater.

[0055] In some embodiments, Figure 1 As shown, the cyclone system further includes a first waste water tank 13 , an inlet of the first waste water tank 13 is connected to the first top flow port 111 , and an outlet of the first waste water tank 13 is connected to an inlet of the second cyclone device 12 .

[0056] The primary wastewater discharged from the first top flow port 111 of the first cyclone device 11 flows into the first wastewater tank 13 for temporary storage, and the primary wastewater entering the second cyclone device 12 can be regulated. According to the processing capacity of the second cyclone device 12, an appropriate amount of primary wastewater is transported thereto to ensure the normal operation of the second cyclone device 12, thereby improving the operation stability of the desulfurization wastewater treatment system 100.

[0057] In some embodiments, the cyclone system further includes a second wastewater tank 14 , an inlet of the second wastewater tank 14 is connected to the second top flow port 121 , and an outlet of the second wastewater tank 14 is connected to the wastewater inlet 211 .

[0058] The secondary wastewater discharged from the second top flow port 121 of the second cyclone device 12 flows into the second wastewater tank 14 for temporary storage, and the secondary wastewater entering the neutralization tank 21 can be adjusted. According to the processing capacity of the neutralization tank 21, an appropriate amount of secondary wastewater is transported into it to ensure the normal operation of the wastewater reaction device 2, thereby further improving the stability and reliability of the operation of the desulfurization wastewater treatment system 100.

[0059] The desulfurization wastewater treatment method of the embodiment of the present invention adopts the desulfurization wastewater treatment system 100 of any of the above embodiments, and the desulfurization wastewater treatment method comprises the following steps:

[0060] S1: transporting the desulfurized wastewater in the absorption tower 200 to the cyclone system;

[0061] S2: Separate the desulfurization wastewater by using a cyclone system to form a solid slurry and wastewater to be treated, the solid slurry is discharged from the solid slurry port, and the wastewater to be treated is transported from the outlet of the cyclone system to the wastewater reaction device 2;

[0062] S3: using the wastewater reaction device 2 to perform chemical reaction treatment on the wastewater to be treated to form solid-liquid mixed wastewater, and the solid-liquid mixed wastewater is transported to the clarification device 3;

[0063] S4: using the clarification device 3 to perform solid-liquid separation on the solid-liquid mixed wastewater to form sludge and filtrate water, and the sludge is discharged from the sludge outlet 311;

[0064] S5: The filtrate clean water is tested based on the discharge standard. If the filtrate clean water meets the discharge standard, the filtrate clean water is discharged through the qualified water outlet 321. If the filtrate clean water does not meet the discharge standard, the filtrate clean water is discharged through the unqualified water outlet 322.

[0065] The desulfurization wastewater treatment method of the embodiment of the present invention first pre-treats the desulfurization wastewater through a cyclone system before subjecting the desulfurization wastewater to chemical reaction treatment, so as to separate solid particles such as gypsum in the desulfurization wastewater. Compared with the method of using a grid treatment to filter solid impurities in the related art, the method can reduce the probability of solid particles causing blockage of pipelines and equipment, and improve the stability and reliability of the desulfurization wastewater treatment system 100.

[0066] It is understandable that the above description of the desulfurization wastewater treatment system 100 is also applicable to the desulfurization wastewater treatment method, and will not be repeated here.

[0067] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A desulfurization wastewater treatment system (100), characterized in that: include: A cyclone system, the inlet of the cyclone system is used to connect to the absorption tower (200), and the cyclone system has a solid slurry port; A wastewater reaction device (2), the wastewater reaction device (2) having a wastewater inlet (211) and a wastewater outlet (231), the wastewater inlet (211) being connected to the outlet of the cyclone system; A clarification device (3), wherein the inlet of the clarification device (3) is connected to the wastewater outlet (231), and the clarification device (3) has a sludge outlet (311), a qualified water outlet (321), and an unqualified water outlet (322); Wherein, at least one of the solid slurry outlet and the unqualified water outlet (322) is connected to the absorption tower (200).

2. The desulfurization wastewater treatment system (100) according to claim 1, characterized in that: The cyclone system comprises: A first cyclone device (11), wherein an inlet of the first cyclone device (11) is used to connect to an absorption tower (200), and the first cyclone device (11) has a first top flow port (111) and a first bottom flow port (112); A second cyclone device (12), the second cyclone device (12) having a second top flow port (121) and a second bottom flow port (122), the inlet of the second cyclone device (12) being connected to the first top flow port (111); The second top flow port (121) forms the outlet of the cyclone system, and the first bottom flow port (112) and the second bottom flow port (122) form the solid slurry port.

3. The desulfurization wastewater treatment system (100) according to claim 2, characterized in that: It also includes a dewatering belt (4), which is arranged on the lower side of the first cyclone device (11) so that the solid slurry discharged from the first bottom flow outlet (112) falls into the upper side of the dewatering belt (4), and the dewatering belt (4) has a solid discharge end (41) and a liquid discharge end (42).

4. The desulfurization wastewater treatment system (100) according to claim 3, characterized in that: The clarification device (3) comprises a clarifier (31) and a clean water tank (32), the inlet of the clarifier (31) is connected to the wastewater outlet (231), the clarifier (31) has the sludge outlet (311) and the clean water outlet, the clean water tank (32) is connected to the clean water outlet, and the clean water tank (32) has the qualified water outlet (321) and the unqualified water outlet (322).

5. The desulfurization wastewater treatment system (100) according to claim 4, characterized in that: A water quality detector is arranged in the clean water tank (32).

6. The desulfurization wastewater treatment system (100) according to claim 4, characterized in that: It also includes a reflux water tank (5), the outlet of which is connected to the absorption tower (200), and at least one of the liquid discharge end (42), the second bottom flow outlet (122), and the unqualified water outlet (322) is connected to the inlet of the reflux water tank (5).

7. The desulfurization wastewater treatment system (100) according to claim 1, characterized in that: The wastewater reaction device (2) comprises a neutralization tank (21), a sedimentation tank (22) and a flocculation tank (23) which are connected in sequence. The neutralization tank (21) has the wastewater inlet (211), and the flocculation tank (23) has the wastewater outlet (231).

8. The desulfurization wastewater treatment system (100) according to claim 2, characterized in that: The cyclone system further comprises a first waste water tank (13), the inlet of the first waste water tank (13) being connected to the first top flow port (111), and the outlet of the first waste water tank (13) being connected to the inlet of the second cyclone device (12).

9. The desulfurization wastewater treatment system (100) according to claim 8, characterized in that: The cyclone system further comprises a second wastewater tank (14), the inlet of the second wastewater tank (14) being connected to the second top flow port (121), and the outlet of the second wastewater tank (14) being connected to the wastewater inlet (211).

10. A method for treating desulfurization wastewater, characterized in that: The desulfurization wastewater treatment system (100) according to any one of claims 1 to 9 is used, and the desulfurization wastewater treatment method comprises the following steps: transporting the desulfurized wastewater in the absorption tower (200) to the cyclone system; The desulfurization wastewater is separated by the cyclone system to form a solid slurry and wastewater to be treated, the solid slurry is discharged from the solid slurry port, and the wastewater to be treated is transported from the outlet of the cyclone system to the wastewater reaction device (2); The wastewater reaction device (2) is used to perform chemical reaction treatment on the wastewater to be treated to form solid-liquid mixed wastewater, and the solid-liquid mixed wastewater is transported to the clarification device (3); The solid-liquid mixed wastewater is subjected to solid-liquid separation by using the clarification device (3) to form sludge and filtrate clear water, and the sludge is discharged from the sludge outlet (311); The filtrate clean water is tested based on the emission standard. If the filtrate clean water meets the emission standard, the filtrate clean water is discharged through the qualified water outlet (321). If the filtrate clean water does not meet the emission standard, the filtrate clean water is discharged through the unqualified water outlet (322).

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