Desulfurization wastewater treatment system for ceramic factory

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a desulfurization wastewater treatment system for a ceramic factory, which comprises a treatment separation system, a quenching evaporation system, a dust removal discharge system and a kiln, the treatment and separation system is used for treating the desulfurization wastewater and separating out clear water and sludge; the quenching evaporation system is used for receiving the clear water separated by the treatment separation system and quenching the clear water, and the quenching evaporation system is further used for receiving hot air discharged by the kiln and spraying the quenched clear water to the hot air; the dust removal and discharge system is used for receiving the hot air cooled by the quenching evaporation system, removing dust from the hot air and then discharging the hot air; and the quenching evaporation system comprises a quenching spray gun, a quenching evaporation tower and a quenching fan. When hot gas discharged from the tail section of the kiln enters the quenching evaporation tower, the desulfurization wastewater treated by the treatment separation system is sprayed to the hot gas through the quenching spray gun, so that the hot gas is cooled, the direct discharge of the desulfurization wastewater is reduced, and the resource utilization of the desulfurization wastewater is realized.

Description

[0001] Priority Statement

[0002] This application requires filing with the Chinese Patent Office on August 28, 2024, application number [Application Number Missing]. CN2024220909088, Utility Model A Chinese product named "A Desulfurization Wastewater Treatment System for Ceramic Factories" The priority of the patent application, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This utility model relates to the field of wastewater treatment technology, and in particular to a desulfurization wastewater treatment system for ceramic factories. Background Technology

[0004] In the ceramic production process, the combustion of fossil fuels such as coal produces a large amount of sulfur dioxide emissions. To meet environmental standards, ceramic factories generally use desulfurization technology to reduce sulfur dioxide emissions. During desulfurization, sulfides in the exhaust gas are absorbed by absorbents (such as limestone and gypsum) and react chemically with the absorbent to generate compounds such as sulfates and sulfites. These compounds are subsequently discharged as wastewater, forming desulfurization wastewater. Currently, ceramic factory desulfurization wastewater treatment systems mainly use physical, chemical, or biological methods to purify the wastewater, ensuring that indicators such as suspended solids, heavy metal ions, and chemical oxygen demand (COD) in the wastewater meet national or local emission standards. (For example, announcement number...) Chinese patent document CN112358114A discloses a combined zero-discharge treatment process for desulfurization wastewater and waste alkali solution; waste alkali solution After being mixed and reacted with desulfurization wastewater, the mixture is precipitated and filtered to remove impurities. The clarified liquid then enters a concentration system where low-temperature evaporation is used to remove the salt content. The organic wastewater is further concentrated to near the salt precipitation point before entering the incineration system. High-concentration saline organic waste liquid undergoes a high-temperature oxidation reaction in an incinerator, decomposing and eliminating organic components, producing... The generated high-temperature flue gas undergoes rapid cooling, waste heat recovery, and desulfurization. After dust and alkali washing treatment meet the standards, it is discharged from outside the chimney. The salt solution produced after rapid cooling is fed into a crystallization system for further processing to recover crystalline salt.

[0005] These treatment systems have solved the pollution problem caused by direct wastewater discharge to some extent. However, the treated wastewater is often directly discharged into natural water bodies or municipal sewage treatment plants, and wastewater resources cannot be effectively recycled, wasting precious water resources.

[0006] Therefore, it is necessary to improve existing technologies to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a desulfurization wastewater treatment system for ceramic factories, which aims to solve the problem that desulfurization wastewater cannot be effectively recycled in the existing technology.

[0008] To achieve the above objectives, this utility model provides a desulfurization wastewater treatment system for a ceramics factory, comprising a treatment and separation system, a rapid cooling and evaporation system, a dust removal and emission system, and a kiln; the treatment and separation system, the dust removal and emission system, and the kiln are respectively connected to the rapid cooling and evaporation system; the treatment and separation system is used to treat the desulfurization wastewater and separate clean water and sludge; the rapid cooling and evaporation system is used to receive the clean water separated by the treatment and separation system and rapidly cool the clean water, and also to receive the hot air discharged from the kiln and spray the rapidly cooled clean water onto the hot air; the dust removal and emission system is used to receive the hot air cooled by the rapid cooling and evaporation system, remove dust from the hot air, and then discharge it;

[0009] The quench evaporation system includes a quench spray gun, a quench evaporation tower, and a quench fan; the quench fan is located at the tail section of the kiln; the upper part of the quench evaporation tower is connected to the tail section of the kiln, and the lower part of the quench evaporation tower is connected to the dust removal and emission system; one end of the quench spray gun is connected to the upper side of the quench evaporation tower, and the other end is connected to the treatment and separation system through a water pump; the quench spray gun is also connected to a compressed air device.

[0010] Furthermore, the treatment and separation system includes a wastewater separation system and a sediment separation system. The wastewater separation system includes a buffer tank, a neutralization tank, a primary sedimentation tank, a flocculation tank, a settling tank, a final sedimentation tank, and an effluent tank connected in sequence. The desulfurization wastewater enters the neutralization tank from the buffer tank, and after the reaction in the neutralization tank, it is separated into primary clear water and primary sediment in the primary sedimentation tank. The primary clear water enters the flocculation tank from the primary sedimentation tank, and after the reaction in the flocculation tank, it enters the settling tank, and is then separated into final clear water and final sediment in the final sedimentation tank. Finally, the final clear water enters the effluent tank, which is connected to the quenching spray gun via an effluent pump. The sediment separation system is connected to the primary sedimentation tank and the final sedimentation tank via a sludge pump.

[0011] Furthermore, there are two water pumps, one end of which is connected to the water tank and the other end of which is connected to the quenching spray gun.

[0012] Furthermore, a sand filter tank is installed between the water pump and the quench spray gun.

[0013] Furthermore, the sediment separation system includes a filter press, a water receiving tray, and a sludge receiving tray. The filter press is connected to the primary sedimentation tank and the final sedimentation tank via a sludge pump. The water receiving tray and the sludge receiving tray are located below the filter press. The primary sediment in the primary sedimentation tank and the final sediment in the final sedimentation tank are pumped to the filter press by the sludge pump, and then the filter press separates the clear water and sludge. The clear water and sludge fall into the water receiving tray and the sludge receiving tray, respectively.

[0014] Furthermore, there are two sludge pumps, one end of which is connected to the filter press, and the other end of which is connected to the primary sedimentation tank and the final sedimentation tank.

[0015] Furthermore, the water receiving tray is connected to an equalization tank, and the clean water separated by the filter press falls into the water receiving tray and then enters the equalization tank.

[0016] Furthermore, the dust removal and emission system includes a dust collector and an emission chimney; the dust collector is connected to the lower part of the quench evaporation tower, and the emission chimney is connected to the dust collector via an induced draft fan.

[0017] Furthermore, the bottom of the quench evaporator is connected to a buffer tank.

[0018] The desulfurization wastewater treatment system for ceramic factories provided by this utility model, compared with the prior art, involves the hot gas discharged from the tail section of the kiln entering the quench evaporation tower. The desulfurization wastewater treated by the separation system is then sprayed onto the hot gas through a quench spray gun to cool the gas, thereby reducing the direct discharge of desulfurization wastewater. This helps to realize the resource utilization of desulfurization wastewater, reduce environmental pollution, and at the same time, reduce the demand for fresh water sources, thereby reducing the cost of water resource use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the separation system.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Treatment and separation system; 11. Wastewater separation system; 110. Buffer tank; 111. Neutralization tank; 112. Primary sedimentation tank; 113. Flocculation tank; 114. Sedimentation tank; 115. Final sedimentation tank; 116. Effluent tank; 117. Effluent pump; 118. Sand filter tank; 12. Sediment separation system; 121. Sludge pump; 122. Filter press; 123. Water receiving tray; 124. Sludge receiving tray; 125. Equalization tank;

[0023] 2. Rapid cooling evaporation system; 21. Rapid cooling spray gun; 22. Rapid cooling evaporation tower; 23. Rapid cooling fan; 24. Compressed air device;

[0024] 3. Dust removal and emission system; 31. Dust collector; 32. Emission chimney; 33. Exhaust fan;

[0025] 4. Kiln. Detailed Implementation

[0026] The present invention will be described in detail below with reference to specific embodiments.

[0027] In this utility model, unless otherwise explicitly specified and limited, when terms such as "set in," "connected," or "linked" appear, these terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through one or more intermediate media. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The directional terms appearing in this utility model are for the purpose of better describing the characteristics of the features and the relationships between them. It should be understood that when the placement direction of this utility model changes, the direction of the characteristics of the features and the relationships between them also changes accordingly. Therefore, directional terms do not constitute an absolute limitation on the characteristics of the features and the relationships between them in space, but only a relative limitation.

[0028] This utility model provides a desulfurization wastewater treatment system for ceramic factories, such as... Figures 1 to 2 As shown, it includes a treatment and separation system 1, a rapid cooling and evaporation system 2, a dust removal and emission system 3, and a kiln 4; the treatment and separation system 1, the dust removal and emission system 3, and the kiln 4 are respectively connected to the rapid cooling and evaporation system 2; the treatment and separation system 1 is used to treat desulfurization wastewater and separate clean water and sludge; the rapid cooling and evaporation system 2 is used to receive the clean water separated by the treatment and separation system 1 and rapidly cool the clean water, and the rapid cooling and evaporation system 2 is also used to receive the hot air discharged from the kiln 4 and spray the rapidly cooled clean water onto the hot air; the dust removal and emission system 3 is used to receive the hot air cooled by the rapid cooling and evaporation system 2 and remove dust from the hot air before emission;

[0029] The rapid cooling evaporation system 2 includes a rapid cooling spray gun 21, a rapid cooling evaporation tower 22, and a rapid cooling fan 23; the rapid cooling fan 23 is located at the tail section of the kiln 4; the upper part of the rapid cooling evaporation tower 22 is connected to the tail section of the kiln 4, and the lower part of the rapid cooling evaporation tower 22 is connected to the dust removal and emission system 3; one end of the rapid cooling spray gun 21 is connected to the upper side of the rapid cooling evaporation tower 22, and the other end is connected to the treatment and separation system 1 through the water pump 117; the rapid cooling spray gun 21 is also connected to a compressed air device 24.

[0030] Based on the above structural setup, when the hot gas discharged from the tail section of the kiln 4 enters the quench evaporation tower 22, the desulfurization wastewater treated by the separation system 1 is sprayed onto the hot gas through the quench spray gun 21, thereby cooling the hot gas and reducing the direct discharge of desulfurization wastewater. This helps to realize the resource utilization of desulfurization wastewater, reduce environmental pollution, and at the same time, it can also reduce the demand for fresh water sources, thereby reducing the cost of water resource use.

[0031] In this embodiment, the treatment and separation system 1 includes a wastewater separation system 11 and a sediment separation system 12. The wastewater separation system 11 includes a buffer tank 110, a neutralization tank 111, a primary sedimentation tank 112, a flocculation tank 113, a settling tank 114, a final sedimentation tank 115, and an effluent tank 116 connected in sequence. The desulfurization wastewater enters the neutralization tank 111 from the buffer tank 110, reacts in the neutralization tank 111, and then passes through the primary sedimentation tank 112 to separate the primary precipitate. Water and primary sediment: The initial purified water enters the flocculation tank 113 from the primary sedimentation tank 112. After reacting in the flocculation tank 113, it enters the sedimentation tank 114 and then the final sedimentation tank 115 to separate the final purified water and the final sediment. Finally, the final purified water enters the effluent tank 116. The effluent tank 116 is connected to the quenching spray gun 21 via the effluent pump 117. The sediment separation system 12 is connected to the primary sedimentation tank 112 and the final sedimentation tank 115 via the sludge pump 121. The final purified water is pumped by the effluent pump 117 to the quenching spray gun 21 for quenching spraying. The primary and final sediments are pumped by the sludge pump 121 to the sediment separation system 12 for further separation. Specifically, the effluent tank 116 is also equipped with an external discharge port. When the purified water in the effluent tank 116 is almost full, the purified water in the effluent tank 116 can be discharged through the external discharge port to prevent the purified water from overflowing.

[0032] In this embodiment, two water pumps 117 are provided. One end of each water pump 117 is connected to the water tank 116, and the other end is connected to the quenching spray gun 21. When one water pump 117 fails, the other water pump 117 can continue to work, ensuring the continuous operation of the entire system.

[0033] In this embodiment, a sand filter tank 118 is also provided between the water pump 117 and the quenching spray gun 21. During the process of the final purified water being pumped from the water pump 117 to the quenching spray gun 21, the sand filter tank 118 can effectively remove impurities in the final purified water and improve the purity of the final purified water.

[0034] In this embodiment, the sediment separation system 12 includes a filter press 122, a water receiving tray 123, and a sludge receiving tray 124. The filter press 122 is connected to the primary sedimentation tank 112 and the final sedimentation tank 115 via a sludge pump 121. The water receiving tray 123 and the sludge receiving tray 124 are located below the filter press 122. The primary sediment in the primary sedimentation tank 112 and the final sediment in the final sedimentation tank 115 are pumped to the filter press 122 by the sludge pump 121, where the filter press 122 separates clear water and sludge, which fall into the water receiving tray 123 and the sludge receiving tray 124, respectively. The water receiving tray 123 can effectively collect the clear water separated by the filter press 122, preventing the clear water from being directly discharged into the environment and causing pollution. The sludge receiving tray 124 can effectively collect the sludge separated by the filter press 122, and the collected sludge can then be transported outwards.

[0035] In this embodiment, two sludge pumps 121 are provided. One end of each sludge pump 121 is connected to the filter press 122, and the other end is connected to the primary sedimentation tank 112 and the final sedimentation tank 115. When one sludge pump 121 fails, the other sludge pump 121 can continue to work, ensuring the continuous operation of the sediment separation system 12.

[0036] In this embodiment, the water receiving tray 123 is connected to the equalization tank 125. The clean water separated by the filter press 122 falls into the water receiving tray 123 and then enters the equalization tank 125. After the collected clean water reaches a certain amount, it enters the equalization tank 125 to prevent waste and to help realize the resource utilization of clean water.

[0037] In this embodiment, the dust removal and emission system 3 includes a dust collector 31 and an emission chimney 32. The dust collector 31 is connected to the lower part of the quench evaporation tower 22, and the emission chimney 32 is connected to the dust collector 31 via an induced draft fan 33. The hot gas from the kiln 4 is cooled by the quench evaporation system 2 and then enters the dust collector 31. After being processed by the dust collector 31, impurities in the hot gas are removed. The filtered hot gas then enters the emission chimney 32 for emission under the action of the induced draft fan 33.

[0038] In this embodiment, the bottom of the quench evaporation tower 22 is connected to the buffer pool 110. The cooling water sprayed by the quench spray gun 21 cools the hot air discharged from the kiln 4 and falls to the bottom of the quench evaporation tower 22, and finally returns to the buffer pool 110, effectively recycling the cooling water and reducing the waste of water resources.

[0039] In summary, this ceramics factory desulfurization wastewater treatment system can solve the problem of the inability to effectively recycle desulfurization wastewater in existing technologies.

[0040] Where there is no conflict, the above embodiments and features can be combined with each other.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A desulfurization wastewater treatment system for a ceramics factory, characterized in that: It includes a processing and separation system (1), a quench evaporation system (2), a dust removal and emission system (3), and a kiln (4); the processing and separation system (1), the dust removal and emission system (3), and the kiln (4) are respectively connected to the quench evaporation system (2); The treatment and separation system (1) is used to treat desulfurization wastewater and separate clean water and sludge; The rapid cooling evaporation system (2) is used to receive the clean water separated by the processing separation system (1) and rapidly cool the clean water. The rapid cooling evaporation system (2) is also used to receive the hot air discharged from the kiln (4) and spray the rapidly cooled clean water onto the hot air. The dust removal and emission system (3) is used to receive the hot air cooled by the rapid cooling evaporation system (2), remove dust from the hot air, and then discharge it. The quench evaporation system (2) includes a quench spray gun (21), a quench evaporation tower (22), and a quench fan (23); the quench fan (23) is located at the tail end of the kiln (4); the upper part of the quench evaporation tower (22) is connected to the tail end of the kiln (4), and the lower part of the quench evaporation tower (22) is connected to the dust removal and emission system (3); one end of the quench spray gun (21) is connected to the upper side of the quench evaporation tower (22), and the other end is connected to the treatment and separation system (1) through the water pump (117). The quench spray gun (21) is also connected to a compressed air device (24).

2. The ceramic factory desulfurization wastewater treatment system according to claim 1, characterized in that: The treatment and separation system (1) includes a wastewater separation system (11) and a sedimentation system (12); the wastewater separation system (11) includes a buffer tank (110), a neutralization tank (111), a primary sedimentation tank (112), a flocculation tank (113), a settling tank (114), a final sedimentation tank (115), and an effluent tank (116) connected in sequence; the desulfurization wastewater enters the neutralization tank (111) from the buffer tank (110), reacts in the neutralization tank (111), and then passes through the primary sedimentation tank (112) to separate the initial clear water. The primary sedimentation tank (112) and the primary sedimentation tank (113) are used to separate the primary water and the primary sedimentation tank. The primary water enters the flocculation tank (113) after the reaction in the flocculation tank (113), and then enters the sedimentation tank (114) and the final sedimentation tank (115) to separate the final water and the final sedimentation tank. Finally, the final water enters the effluent tank (116). The effluent tank (116) is connected to the quenching spray gun (21) through the effluent pump (117). The sedimentation separation system (12) is connected to the primary sedimentation tank (112) and the final sedimentation tank (115) through the sludge pump (121).

3. The ceramic factory desulfurization wastewater treatment system according to claim 2, characterized in that: There are two water pumps (117). One end of each water pump (117) is connected to the water tank (116), and the other end is connected to the quenching spray gun (21).

4. The ceramic factory desulfurization wastewater treatment system according to claim 3, characterized in that: A sand filter tank (118) is also installed between the water pump (117) and the quench spray gun (21).

5. The ceramic factory desulfurization wastewater treatment system according to claim 2, characterized in that: The sediment separation system (12) includes a filter press (122), a water receiving tray (123), and a sludge receiving tray (124). The filter press (122) is connected to the primary sedimentation tank (112) and the final sedimentation tank (115) via a sludge pump (121). The water receiving tray (123) and the sludge receiving tray (124) are located below the filter press (122). The primary sediment in the primary sedimentation tank (112) and the final sediment in the final sedimentation tank (115) are pumped to the filter press (122) by the sludge pump (121). After being separated by the filter press (122), the clear water and sludge are separated. The clear water and sludge fall into the water receiving tray (123) and the sludge receiving tray (124), respectively.

6. The ceramic factory desulfurization wastewater treatment system according to claim 5, characterized in that: Two sludge pumps (121) are provided. One end of each sludge pump (121) is connected to the filter press (122), and the other end is connected to the primary sedimentation tank (112) and the final sedimentation tank (115).

7. The ceramic factory desulfurization wastewater treatment system according to claim 5, characterized in that: The water receiving tray (123) is connected to the equalization tank (125). The clear water separated by the filter press (122) falls into the water receiving tray (123) and then enters the equalization tank (125).

8. The ceramic factory desulfurization wastewater treatment system according to claim 1, characterized in that: The dust removal and emission system (3) includes a dust collector (31) and an emission chimney (32); the dust collector (31) is connected to the lower part of the quench evaporation tower (22), and the emission chimney (32) is connected to the dust collector (31) through an induced draft fan (33).

9. The ceramic factory desulfurization wastewater treatment system according to claim 1, characterized in that: The bottom of the quench evaporator (22) is connected to the buffer tank (110).

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