Desulfurization slurry treatment system suitable for flue gas desulfurization process by using alkali-making salty mud

Abstract

The utility model discloses a desulfurization slurry treatment system suitable for performing a flue gas desulfurization process by using alkali-making salty mud, which comprises a desulfurization slurry cyclone, a waste water collecting box and a waste water cyclone which are connected in sequence, a continuous passage for enriching and treating the chlorine-containing wastewater is formed among the desulfurization slurry conveying pipe, the desulfurization slurry cyclone, the wastewater collecting tank, the overflow liquid conveying pipe, the wastewater cyclone and the wastewater treatment station; a continuous passage for recycling dechlorinated gypsum slurry is formed among the desulfurization slurry conveying pipe, the desulfurization slurry cyclone and the desulfurization absorption tower; and a continuous passage for recycling generated low-chlorine wastewater is formed among the desulfurization slurry conveying pipe, the desulfurization slurry cyclone, the wastewater collecting tank, the overflow liquid conveying pipe, the wastewater cyclone, the filtrate collecting tank and the salty mud dissolving tank. The concentration of chloride ions in a desulfurization system is reduced, on the other hand, salty mud, water and the like are recycled, and the resource utilization rate is increased while pollution discharge and waste discharge are reduced.

Description

Technical Field

[0001] The utility model relates to a desulfurization slurry processing system for a flue gas desulfurization process, in particular to a desulfurization slurry processing system suitable for a flue gas desulfurization process using alkali salt mud, and belongs to the technical field of salt mud recovery and reuse. Background Art

[0002] In the process of making alkali, saturated salt water is generally used as the main raw material, and caustic soda (sodium hydroxide) is prepared by electrolysis. The mud discharged in this process is called "salt mud", and its main components are CaCO3 (content about 90%), NaCl (content about 7%), Mg (OH) 2 (content about 2%), BaSO4 and mud sand. At present, most of the salt mud is directly dumped, piled or buried, etc., without being thoroughly treated, which harms the environment; some adopt a comprehensive utilization method, that is, using salt mud as raw material to prepare cement, artificial stone and other building materials. However, with the increasing requirements for energy conservation and emission reduction, restrictions on the building materials market and limited annual processing capacity, the harmless treatment and utilization of salt mud has become a huge challenge facing the development of this industry.

[0003] Since the main component of salt mud is CaCO3, its composition is the same as the desulfurizer involved in the wet desulfurization process of coal-fired flue gas - limestone powder. Therefore, salt mud is used as a desulfurizer in the wet desulfurization process of coal-fired flue gas (such as: CN1830525, CN101632896, CN103230739A, CN114873890A, etc.) to solve the problem of difficult salt mud solid waste treatment. Among them, after SO2 in coal-fired flue gas is absorbed by salt mud, the SO2 concentration decreases, and the chimney flue gas meets the emission requirements and is discharged into the atmosphere; desulfurization slurry (gypsum mud) is formed in the absorption tower, and then the gypsum mud is recycled and reused. The reaction formulas involved in the formation of gypsum mud include:

[0004] CaCO3+SO2+H2O →CaSO3·H2O +CO2;

[0005] CaSO3·H2O + SO2+ H2O→Ca(HSO3)2+H2O

[0006] Ca(HSO3)2+1 / 2O2+2H2O→CaSO4·2H2O+SO2+H2O;

[0007] CaSO3·H2O +1 / 2O2+2H2O→CaSO4·2H2O +H2O;

[0008] However, at the same time, since the alkali salt mud contains NaCl, the Cl in the whole coal-fired flue gas wet desulfurization system - The concentration rises faster, which not only affects the quality of the gypsum after the desulfurization slurry is recovered, but also has a corrosive effect on the desulfurization equipment.

[0009] At present, the chloride ion treatment in the flue gas desulfurization system is almost in a blank state. Summary of the invention

[0010] In order to ensure the overall stable operation of the coal-fired flue gas wet desulfurization system, the Cl content in the desulfurization slurry should be reduced. - The concentration of gypsum is reduced, the impact on the quality of gypsum and the corrosion of desulfurization equipment are reduced, and the desulfurization slurry treatment process is improved, that is, a desulfurization slurry treatment system suitable for flue gas desulfurization process with alkali salt mud is proposed. Among them, through the settings of desulfurization slurry cyclone and wastewater cyclone, the solid (salt mud, gypsum) and liquid (wastewater containing chloride ions) are separated, on the one hand, the chloride ion concentration in the desulfurization system is reduced, and on the other hand, the salt mud, gypsum, water, etc. are recycled and reused, that is, while reducing pollution and waste discharge, the utilization rate of resources is improved.

[0011] In order to achieve the above technical objectives, the following technical solutions are proposed:

[0012] A desulfurization slurry treatment system suitable for a flue gas desulfurization process using alkali salt mud, comprising a desulfurization slurry cyclone for separating the desulfurization slurry, a wastewater collection box for collecting and temporarily storing overflow liquid discharged from the desulfurization slurry cyclone, and a wastewater cyclone for separating the overflow liquid;

[0013] The feed port of the desulfurization slurry cyclone is connected to the desulfurization slurry discharge port of the desulfurization absorption tower through the desulfurization slurry conveying pipe. The desulfurization absorption tower is arranged in the flue gas desulfurization system of alkali salt mud; the underflow liquid outlet of the desulfurization slurry cyclone is connected to the desulfurization absorption tower, and the overflow liquid outlet of the desulfurization slurry cyclone is connected to the feed port of the wastewater collection box;

[0014] The discharge port of the wastewater collection box is connected to the feed port of the wastewater cyclone through the overflow wastewater conveying pipe, the overflow liquid outlet of the wastewater cyclone is connected to the wastewater treatment station, the underflow liquid outlet of the wastewater cyclone is connected to the filtrate collection tank, the filtrate collection tank is connected to the dehydration device, the dehydration device and the filtrate collection tank are both arranged in the gypsum mud recovery system for flue gas desulfurization of alkali salt mud; the filtrate collection tank is also connected to the salt mud dissolution tank in the flue gas desulfurization system of alkali salt mud;

[0015] A continuous passage for enriching and treating chlorine-containing wastewater is formed between the desulfurization slurry delivery pipe, the desulfurization slurry cyclone, the wastewater collection tank, the overflow liquid delivery pipe, the wastewater cyclone and the wastewater treatment station;

[0016] A continuous passage is formed between the desulfurization slurry conveying pipe, the desulfurization slurry cyclone and the desulfurization absorption tower for the reuse of the gypsum slurry after dechlorination;

[0017] A continuous passage for reusing low-chlorine wastewater after it is produced is formed between the desulfurization slurry conveying pipe, the desulfurization slurry cyclone, the wastewater collecting box, the overflow liquid conveying pipe, the wastewater cyclone, the filtrate collecting tank and the salt mud dissolving tank.

[0018] Furthermore, a desulfurization slurry discharge pump is provided on the desulfurization slurry delivery pipe.

[0019] Furthermore, the desulfurization slurry cyclone comprises a shell I and a desulfurization slurry distribution chamber, a cyclone I, an underflow liquid collection chamber I and an overflow liquid collection chamber I arranged in the shell I;

[0020] The desulfurization slurry distribution chamber is connected to the desulfurization slurry conveying pipe, the feed port of the cyclone I is connected to the desulfurization slurry distribution chamber, the underflow liquid outlet of the cyclone I is connected to the underflow liquid collection chamber I, and the underflow liquid collection chamber I is connected to the desulfurization absorption tower; the overflow liquid outlet of the cyclone I is connected to the overflow liquid collection chamber I, and the overflow liquid collection chamber I is connected to the wastewater collection box. This limitation effectively ensures the desulfurization slurry treatment efficiency, and at the same time, effectively avoids the corrosion effect of chloride ions on the desulfurization absorption tower, thereby improving the stability, continuity and effective operation of the coal-fired flue gas wet desulfurization system; and ensures the subsequent gypsum recovery efficiency and quality.

[0021] Furthermore, there are multiple vortices I, and the vortices I are arranged in parallel.

[0022] Furthermore, a sampling port is provided on the underflow liquid collecting chamber I, which can continuously monitor the components and concentration of the underflow slurry in the underflow liquid collecting chamber I, and then control its entry into the desulfurization absorption tower.

[0023] Furthermore, a wastewater delivery pump is provided on the overflow wastewater delivery pipe.

[0024] Furthermore, the wastewater cyclone comprises a shell II and an overflow wastewater distribution chamber, a cyclone II, an underflow liquid collection chamber II and an overflow liquid collection chamber II arranged in the shell II;

[0025] The overflow wastewater distribution chamber is connected to the overflow wastewater delivery pipe, the feed port of the cyclone II is connected to the overflow wastewater distribution chamber, the underflow liquid outlet of the cyclone II is connected to the underflow liquid collection chamber II, and the underflow liquid collection chamber II is connected to the filtrate collection tank; the overflow liquid outlet of the cyclone II is connected to the overflow liquid collection chamber II, and the overflow liquid collection chamber II is connected to the wastewater treatment station. This limitation effectively guarantees the treatment efficiency and quality of the wastewater discharged from the desulfurization slurry cyclone, and then facilitates the reuse of the underflow liquid (the underflow liquid outlet of the wastewater cyclone is connected to the filtrate collection tank, and the filtrate collection tank is connected to the salt mud dissolution tank in the flue gas desulfurization system of alkali salt mud), and also facilitates the subsequent treatment of the overflow liquid (the overflow liquid outlet of the wastewater cyclone is connected to the wastewater treatment station).

[0026] Furthermore, there are multiple vortex flow generators II, and the vortex flow generators II are arranged in parallel.

[0027] Furthermore, the alkali salt mud flue gas desulfurization system includes a salt mud dissolution tank, a salt mud slurry tank and a desulfurization absorption tower which are connected in sequence.

[0028] Furthermore, the desulfurization absorption tower is a single-tower double-circulation desulfurization tower, which includes an absorption tower and an AFT tower, and the desulfurization slurry cyclone is connected to the absorption tower.

[0029] Furthermore, the gypsum mud recovery system for flue gas desulfurization using alkali salt mud comprises the desulfurization slurry cyclone, dehydration device and gypsum recovery reservoir connected in sequence, and the dehydration device is connected to the filtrate collection tank.

[0030] The relationships involved in this technical solution, such as "between", "on", "in", and "connected in sequence", are defined according to the actual usage conditions. They are conventional terms in this technical field and are also conventional terms used by technicians in this field in actual usage.

[0031] The beneficial technical effects brought about by adopting this technical solution are:

[0032] 1. The utility model effectively ensures the overall stable operation of the coal-fired flue gas wet desulfurization system and reduces the Cl - Concentration, reduce the impact on gypsum quality and corrosion to desulfurization equipment. Among them, through the desulfurization slurry cyclone and wastewater cyclone, the solid (gypsum containing salt mud) and liquid (wastewater containing chloride ions) separation is achieved, on the one hand, the chloride ion concentration in the desulfurization system is reduced, and on the other hand, the salt mud, water, etc. are recycled and reused, that is, while reducing pollution and waste discharge, the utilization rate of resources is improved;

[0033] Second, the utility model cleverly and specifically crosses to the flue gas desulfurization system of alkali salt sludge, the gypsum mud recovery system of flue gas desulfurization of alkali salt sludge, and the wastewater treatment station to ensure the stability and orderliness of the desulfurization slurry treatment process;

[0034] 3. This utility model is mainly used in wet flue gas desulfurization system Cl - When the content is high, it can be unaffected by other factors and can continuously process the desulfurization slurry, effectively avoiding the influence on gypsum crystallization and the corrosion of desulfurization equipment;

[0035] 4. The utility model can continuously and uninterruptedly prepare wastewater without paying attention to the density of the desulfurization slurry in the flue gas desulfurization system and the desulfurization slurry does not pass through the vacuum belt dehydrator to produce gypsum. The maximum wastewater preparation amount can reach 200t / d, and the wastewater can be partially reused in the flue gas desulfurization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a flow chart of the utility model;

[0037] Figure 2 This is a flow chart of the flue gas desulfurization system of alkali salt mud in the utility model;

[0038] In the figure, 1, desulfurization slurry cyclone, 101, shell I, 102, desulfurization slurry distribution chamber, 103, cyclone I, 104, underflow liquid collection chamber I, 105, overflow liquid collection chamber I, 2, wastewater collection box, 3, wastewater cyclone, 301, shell II, 302, overflow wastewater distribution chamber, 303, cyclone II, 304, underflow liquid collection chamber II, 305, overflow liquid collection chamber II, 4, desulfurization slurry delivery pipe, 5, overflow wastewater delivery pipe, 6, wastewater treatment station, 7, desulfurization slurry discharge pump, 8, sampling port, 9, wastewater delivery pump, 10, desulfurization absorption tower, 11, salt mud dissolution tank, 12, salt mud slurry tank, 13, filtrate collection tank, 14, dehydration device, 15, limestone powder warehouse, 16, gypsum recovery warehouse. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Example 1

[0041] This example is based on the use of alkali salt mud as a desulfurizing agent. - In the case of rising content, affecting gypsum crystallization and corroding desulfurization equipment, by transforming the existing desulfurization slurry treatment system (providing a desulfurization slurry treatment system suitable for flue gas desulfurization process using alkali salt mud, integrated into the flue gas desulfurization system using alkali salt mud and the gypsum mud recovery system using alkali salt mud for flue gas desulfurization), increasing the daily wastewater preparation volume, thereby reducing the Cl content of the desulfurization system - content.

[0042] The details are as follows: A desulfurization slurry treatment system suitable for flue gas desulfurization process using alkali salt mud, such as Figure 1 As shown, it includes a desulfurization slurry cyclone 1 for separating desulfurization slurry, a wastewater collection box 2 for collecting and temporarily storing overflow liquid discharged from the desulfurization slurry cyclone 1, and a wastewater cyclone 3 for separating the overflow liquid;

[0043] The feed port of the desulfurization slurry cyclone 1 is connected to the desulfurization slurry discharge port of the desulfurization absorption tower 10 through the desulfurization slurry delivery pipe 4, and the desulfurization absorption tower 10 is arranged in the flue gas desulfurization system of alkali salt mud; the underflow liquid outlet of the desulfurization slurry cyclone 1 is connected to the desulfurization absorption tower 10, and the overflow liquid outlet of the desulfurization slurry cyclone 1 is connected to the feed port of the wastewater collection box 2;

[0044] The discharge port of the wastewater collection box 2 is connected to the feed port of the wastewater cyclone 3 through the overflow wastewater conveying pipe 5, the overflow liquid outlet of the wastewater cyclone 3 is connected to the wastewater treatment station 6, the underflow liquid outlet of the wastewater cyclone 3 is connected to the filtrate collection tank 13, the filtrate collection tank 13 is connected to the dehydration device 14, the dehydration device 14 and the filtrate collection tank 13 are both arranged in the gypsum mud recovery system for flue gas desulfurization of alkali salt mud; the filtrate collection tank 13 is also connected to the salt mud dissolution tank 11 in the flue gas desulfurization system of alkali salt mud (such as Figure 2 shown);

[0045] A continuous passage for enriching and treating chlorine-containing wastewater is formed between the desulfurization slurry delivery pipe 4, the desulfurization slurry cyclone 1, the wastewater collection box 2, the overflow liquid delivery pipe, the wastewater cyclone 3 and the wastewater treatment station 6;

[0046] A continuous passage is formed between the desulfurization slurry delivery pipe 4, the desulfurization slurry cyclone 1 and the desulfurization absorption tower 10 for the gypsum slurry to be reused after dechlorination;

[0047] A continuous passage for reusing low-chlorine wastewater after it is produced is formed between the desulfurization slurry delivery pipe 4, the desulfurization slurry cyclone 1, the wastewater collection box 2, the overflow liquid delivery pipe, the wastewater cyclone 3, the filtrate collection tank 13 and the salt mud dissolution tank 11.

[0048] The specific work processes involved include:

[0049] The desulfurized slurry that has not been completely reacted in the desulfurized absorption tower 10 is sent to the desulfurized slurry treatment system through the desulfurized slurry delivery pipe 4. In the desulfurized slurry treatment system, the wastewater overflowing from the desulfurized slurry cyclone 1 is collected in the wastewater collection box 2, and the underflow slurry from the bottom flow of the desulfurized slurry cyclone 1 is no longer passed through the vacuum belt dehydrator to produce gypsum, but directly returned to the desulfurized absorption tower 10 to continue to participate in the reaction in the tower, so as to realize the continuous preparation of wastewater and continuous treatment of desulfurized slurry under the condition that the density of the desulfurized slurry cannot reach the degypsum removal, wherein the daily wastewater production is guaranteed to reach 150-200t / d, and the slurry Cl is reduced. - concentration.

[0050] Example 2

[0051] On the basis of Example 1, in order to ensure the smooth transportation and transfer of the desulfurization slurry discharged from the desulfurization absorption tower 10, this example further defines:

[0052] The desulfurization slurry conveying pipe 4 is provided with a desulfurization slurry discharge pump 7 .

[0053] Example 3

[0054] On the basis of Examples 1-2, this Example further defines the desulfurization slurry cyclone 1 as follows:

[0055] The desulfurization slurry cyclone 1 comprises a shell Ⅰ101 and a desulfurization slurry distribution chamber 102, a cyclone Ⅰ103, an underflow liquid collection chamber Ⅰ104 and an overflow liquid collection chamber Ⅰ105 arranged in the shell Ⅰ101;

[0056] The desulfurization slurry distribution chamber 102 is connected to the desulfurization slurry conveying pipe 4, the feed port of the cyclone I 103 is connected to the desulfurization slurry distribution chamber 102, the underflow liquid outlet of the cyclone I 103 is connected to the underflow liquid collecting chamber I 104, and the underflow liquid collecting chamber I 104 is connected to the desulfurization absorption tower 10; the overflow liquid outlet of the cyclone I 103 is connected to the overflow liquid collecting chamber I 105, and the overflow liquid collecting chamber I 105 is connected to the wastewater collection box 2. This limitation effectively ensures the desulfurization slurry treatment efficiency, and at the same time, effectively avoids the corrosion effect of chloride ions on the desulfurization absorption tower 10, thereby improving the stability, continuity and effective operation of the coal-fired flue gas wet desulfurization system; and ensures the subsequent gypsum recovery efficiency and quality.

[0057] There are multiple swirl elements Ⅰ103, and the swirl elements Ⅰ103 are arranged in parallel.

[0058] A sampling port 8 is provided on the underflow liquid collecting chamber I104 , which can continuously monitor the components and concentration of the underflow slurry in the underflow liquid collecting chamber I104 , and then control the underflow slurry to enter the desulfurization absorption tower 10 .

[0059] Example 4

[0060] On the basis of Examples 1-3, in order to ensure the smooth transportation and transfer of the overflow liquid discharged from the desulfurization slurry cyclone 1, this example further defines:

[0061] A wastewater delivery pump 9 is provided on the overflow wastewater delivery pipe 5 .

[0062] Example 5

[0063] Based on Examples 1-4, this example further defines the wastewater cyclone 3 as follows:

[0064] The wastewater cyclone 3 comprises a shell II 301 and an overflow wastewater distribution chamber 302, a cyclone II 303, an underflow liquid collection chamber II 304 and an overflow liquid collection chamber II 305 arranged in the shell II 301;

[0065] The overflow wastewater distribution chamber 302 is connected to the overflow wastewater delivery pipe 5, the feed port of the cyclone II 303 is connected to the overflow wastewater distribution chamber 302, the underflow liquid outlet of the cyclone II 303 is connected to the underflow liquid collection chamber II 304, and the underflow liquid collection chamber II 304 is connected to the filtrate collection tank 13; the overflow liquid outlet of the cyclone II 303 is connected to the overflow liquid collection chamber II 305, and the overflow liquid collection chamber II 305 is connected to the wastewater treatment station 6. This limitation effectively ensures the treatment efficiency and quality of the wastewater discharged from the desulfurization slurry cyclone 1, and then facilitates the reuse of the underflow liquid (the underflow liquid outlet of the wastewater cyclone 3 is connected to the filtrate collection tank 13, and the filtrate collection tank 13 is connected to the salt mud dissolution tank 11 in the flue gas desulfurization system of alkali salt mud), and also facilitates the subsequent treatment of the overflow liquid (the overflow liquid outlet of the wastewater cyclone 3 is connected to the wastewater treatment station 6).

[0066] Furthermore, there are multiple vortex generators II 303 , and the vortex generators II 303 are arranged in parallel.

[0067] Example 6

[0068] On the basis of Examples 1-5, this embodiment provides a flue gas desulfurization system using alkali salt sludge, comprising a salt sludge dissolution tank 11, a salt sludge slurry tank 12 and a desulfurization absorption tower 10 connected in sequence;

[0069] Among them, the salt mud dissolving tank 11: homogenizes the salt mud. The salt mud dissolving tank 11 is connected to the bottom flow liquid collecting chamber II 304, that is, the bottom flow liquid in the bottom flow liquid collecting chamber II 304 is used as a solvent to dissolve the blocky salt mud; in addition, the salt mud dissolving tank 11 is also connected to the process water inlet pipe and the filtrate collecting tank 13, and the filtrate collecting tank 13 is connected to the dehydration device 14 in the gypsum mud recovery system for flue gas desulfurization of alkali salt mud; the salt mud dissolving tank 11 is provided with a stirring mechanism and a filter screen;

[0070] Salt mud slurry tank 12: temporarily stores salt mud. The salt mud slurry tank 12 is also connected to the limestone powder bin 15. When salt mud and other desulfurizers cannot be supplied in time, the limestone powder in the limestone powder bin 15 is used to prepare slurry urgently to ensure the smooth progress of the desulfurization process.

[0071] Desulfurization absorption tower 10: adsorbs and removes sulfur dioxide in coal-fired flue gas. Preferably, the desulfurization absorption tower 10 is a single-tower double-circulation desulfurization tower, which includes an absorption tower and an AFT tower, and the desulfurization slurry cyclone 1 is connected to the absorption tower.

[0072] Example 7

[0073] On the basis of Examples 1-6, this embodiment provides a gypsum mud recovery system for flue gas desulfurization using alkali salt mud, comprising the desulfurization slurry cyclone 1, a dehydration device 14 and a gypsum recovery reservoir 16 connected in sequence, and the dehydration device 14 is connected to the filtrate collection tank 13. Through the setting of this system, the desulfurization slurry (gypsum mud) formed in the absorption tower is recovered and reused.

Claims

1. A desulfurization slurry treatment system suitable for flue gas desulfurization process using alkali salt mud, characterized by: It comprises a desulfurization slurry cyclone (1) for separating desulfurization slurry, a wastewater collection box (2) for collecting and temporarily storing overflow liquid discharged from the desulfurization slurry cyclone (1), and a wastewater cyclone (3) for separating the overflow liquid; The feed port of the desulfurization slurry cyclone (1) is connected to the desulfurization slurry discharge port of the desulfurization absorption tower (10) through the desulfurization slurry delivery pipe (4), and the desulfurization absorption tower (10) is arranged in the flue gas desulfurization system using alkali salt mud; the underflow liquid outlet of the desulfurization slurry cyclone (1) is connected to the desulfurization absorption tower (10), and the overflow liquid outlet of the desulfurization slurry cyclone (1) is connected to the feed port of the wastewater collection box (2); The discharge port of the wastewater collection box (2) is connected to the feed port of the wastewater cyclone (3) through an overflow wastewater delivery pipe (5); the overflow liquid outlet of the wastewater cyclone (3) is connected to a wastewater treatment station (6); the underflow liquid outlet of the wastewater cyclone (3) is connected to a filtrate collection tank (13); the filtrate collection tank (13) is connected to a dehydration device (14); the dehydration device (14) and the filtrate collection tank (13) are both arranged in a gypsum mud recovery system for flue gas desulfurization using alkali salt mud; the filtrate collection tank (13) is also connected to a salt mud dissolution tank (11) in a flue gas desulfurization system using alkali salt mud; A continuous passage for enriching and treating chlorine-containing wastewater is formed between the desulfurization slurry delivery pipe (4), the desulfurization slurry cyclone (1), the wastewater collection tank (2), the overflow liquid delivery pipe, the wastewater cyclone (3) and the wastewater treatment station (6); A continuous passage is formed between the desulfurization slurry conveying pipe (4), the desulfurization slurry cyclone (1) and the desulfurization absorption tower (10) for recycling the gypsum slurry after dechlorination; A continuous passage for recycling low-chlorine wastewater after it is generated is formed between the desulfurization slurry conveying pipe (4), the desulfurization slurry cyclone (1), the wastewater collecting box (2), the overflow liquid conveying pipe, the wastewater cyclone (3), the filtrate collecting tank (13) and the salt mud dissolving tank (11).

2. The desulfurization slurry treatment system for flue gas desulfurization process using alkali salt mud according to claim 1 is characterized in that: The desulfurization slurry delivery pipe (4) is provided with a desulfurization slurry discharge pump (7).

3. The desulfurization slurry treatment system for flue gas desulfurization process using alkali salt mud according to claim 1 is characterized in that: The desulfurized slurry cyclone (1) comprises a shell I (101) and a desulfurized slurry distribution chamber (102), a cyclone I (103), an underflow liquid collection chamber I (104) and an overflow liquid collection chamber I (105) arranged in the shell I (101); The desulfurization slurry distribution chamber (102) is connected to the desulfurization slurry conveying pipe (4), the feed port of the cyclone I (103) is connected to the desulfurization slurry distribution chamber (102), the underflow liquid outlet of the cyclone I (103) is connected to the underflow liquid collecting chamber I (104), and the underflow liquid collecting chamber I (104) is connected to the desulfurization absorption tower (10); the overflow liquid outlet of the cyclone I (103) is connected to the overflow liquid collecting chamber I (105), and the overflow liquid collecting chamber I (105) is connected to the wastewater collection tank (2).

4. The desulfurization slurry treatment system for flue gas desulfurization process using alkali salt mud according to claim 3 is characterized in that: There are a plurality of vortex generators I (103), and the vortex generators I (103) are arranged in parallel.

5. The desulfurization slurry treatment system for flue gas desulfurization process using alkali salt mud according to claim 3 or 4, characterized in that: The underflow liquid collecting chamber I (104) is provided with a sampling port (8).

6. The desulfurization slurry treatment system for flue gas desulfurization process using alkali salt mud according to claim 1 is characterized in that: The overflow wastewater delivery pipe (5) is provided with a wastewater delivery pump (9).

7. The desulfurization slurry treatment system for flue gas desulfurization process using alkali salt mud according to claim 1 is characterized in that: The wastewater cyclone (3) comprises a shell II (301) and an overflow wastewater distribution chamber (302), a cyclone II (303), an underflow liquid collection chamber II (304) and an overflow liquid collection chamber II (305) arranged in the shell II (301); The overflow wastewater distribution chamber (302) is connected to the overflow wastewater delivery pipe (5); the feed port of the cyclone II (303) is connected to the overflow wastewater distribution chamber (302); the underflow liquid outlet of the cyclone II (303) is connected to the underflow liquid collection chamber II (304); the underflow liquid collection chamber II (304) is connected to the filtrate collection tank (13); the overflow liquid outlet of the cyclone II (303) is connected to the overflow liquid collection chamber II (305); and the overflow liquid collection chamber II (305) is connected to the wastewater treatment station (6).

8. The desulfurization slurry treatment system for flue gas desulfurization process using alkali salt mud according to claim 7 is characterized in that: There are a plurality of vortex flow elements II (303), and the vortex flow elements II (303) are arranged in parallel.

9. The desulfurization slurry treatment system for flue gas desulfurization process using alkali salt mud according to claim 1 is characterized in that: The alkali salt sludge flue gas desulfurization system comprises a salt sludge dissolution tank (11), a salt sludge slurry tank (12) and a desulfurization absorption tower (10) which are connected in sequence; the desulfurization absorption tower (10) is a single-tower double-circulation desulfurization tower, which comprises an absorption tower and an AFT tower, and the desulfurization slurry cyclone (1) is connected to the absorption tower.

10. The desulfurization slurry treatment system for flue gas desulfurization process using alkali salt mud according to claim 1 is characterized in that: The gypsum mud recovery system for flue gas desulfurization using alkali salt mud comprises the desulfurization slurry cyclone (1), a dehydration device (14) and a gypsum recovery reservoir (16) which are connected in sequence, and the dehydration device (14) is connected to a filtrate collection tank (13).

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