Novel desulfurization wastewater treatment device and process

Abstract

The invention discloses a novel desulfurization wastewater treatment device and process, and the process comprises the following steps: installing an organic sulfur dosing system into a desulfurization wastewater pre-sedimentation tank M, and conveying wastewater into the desulfurization wastewater pre-sedimentation tank M through a wastewater lifting pump; organic sulfur is added into a desulfurization wastewater pre-sedimentation tank M through an organic sulfur dosing system, so that substances in the wastewater separate wastewater slurry according to density, the clarified wastewater at the upper part is conveyed to a subsequent treatment device, and a mud scraper operates to continuously stir sediments at the bottom; clear water treated by the desulfurization wastewater pre-sedimentation tank M is conveyed into the triple tank through the middle water tank. According to the novel desulfurization wastewater treatment device and process, the pre-sedimentation tank is added before wastewater treatment, and corresponding organic sulfur is added into the wastewater, so that the wastewater is subjected to primary separation, and the wastewater needing to be treated is subjected to primary treatment, so that insoluble particles such as gypsum in subsequent water are reduced; and the swirler is prevented from being blocked.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment equipment, and in particular to a novel desulfurization wastewater treatment device and process. Background Art

[0002] Desulfurization wastewater treatment refers to the treatment of sulfur-containing wastewater generated in industrial production processes such as thermal power plants, steel mills, and refineries to remove pollutants such as sulfides, suspended solids, and heavy metals to meet environmental emission standards. Because desulfurization wastewater contains a large amount of heavy metal ions such as CL-, F-, Ca2+, Mg2+, and Hg+, traditional desulfurization wastewater treatment uses a cyclone-triple treatment process. After the desulfurization wastewater is treated, it is separated by a wastewater cyclone and clarified by adding chemicals in a triple box.

[0003] At present, the traditional equipment will not be clear enough during treatment. The water contains more insoluble particles such as gypsum, which makes the water turbid. The treatment flow is small and the cyclone is prone to structural blockage. Maintenance work is frequent and the equipment reliability is poor, which affects the treatment of various harmful substances in the system and causes serious equipment corrosion. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the fact that the above-mentioned existing new desulfurization wastewater treatment equipment and process have insufficient clarity, the water contains a large amount of insoluble particles such as gypsum, resulting in turbid water, and the treatment flow is small and the cyclone is prone to structural blockage, maintenance work is frequent, and the equipment reliability is poor, which affects the treatment of various harmful substances in the system and causes serious equipment corrosion, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: first, two wastewater lifting pumps are arranged inside the wastewater collecting tank; then, an organic sulfur dosing system is installed in the desulfurization wastewater pre-sedimentation tank M, and then the wastewater is transported to the desulfurization wastewater pre-sedimentation tank M through the wastewater lifting pump; organic sulfur is added to the desulfurization wastewater pre-sedimentation tank M through the organic sulfur dosing system, so that the substances in the wastewater separate the wastewater slurry according to the density, and the clarified wastewater on the upper part is sent to the subsequent treatment device, and the scraper is operated at the same time to continuously stir the sediment at the bottom to prevent deposition; and the clean water treated in the desulfurization wastewater pre-sedimentation tank M is transported to the triple box through the intermediate water pump of the intermediate water tank, and then the subsequent treatment is carried out according to the traditional triple box treatment process.

[0007] As a preferred solution of the novel desulfurization wastewater treatment device and process described in the present invention, one of the wastewater lifting pumps is used as a backup to prevent accidents from causing the equipment to fail to operate.

[0008] As a preferred embodiment of the novel desulfurization wastewater treatment device and process described in the present invention, the process of the organic sulfur dosing system is to prepare an appropriate amount of organic sulfur dosing agent (such as ethyl mercaptan, methyl mercaptan), store it in a storage tank, then mix the dosing agent with water in a certain proportion, and adjust it to a concentration suitable for treatment requirements, and then transport it to the dosing point through a dosing pump. The organic sulfur dosing agent reacts chemically with the sulfide in the wastewater or flue gas to generate water-insoluble sulfide precipitate and other harmless substances.

[0009] As a preferred solution of the novel desulfurization wastewater treatment device and process described in the present invention, the intermediate water tank can balance the changes in flow and load during the treatment process. When the water inlet fluctuates, the water tank can temporarily store clarified wastewater to ensure the stable operation of the entire system.

[0010] As a preferred solution of the novel desulfurization wastewater treatment device and process described in the present invention, the triple box is mainly divided into three steps: pre-separation, flocculation adjustment and sedimentation clarification; secondly, it also includes oil scraping and slag skimming, sludge treatment and water quality monitoring steps.

[0011] The beneficial effects of the first embodiment of the present invention are as follows: by adding a pre-sedimentation tank before wastewater treatment and adding corresponding organic sulfur into the wastewater, the wastewater is preliminarily separated, so that the wastewater to be treated is preliminarily treated, so that the insoluble particles such as gypsum in the subsequent water quality are reduced, and the cyclone will not be blocked.

[0012] In view of the above-mentioned insufficient clarity, the water contains a large amount of insoluble particles such as gypsum, which makes the water turbid, and the treatment flow is small and the cyclone is prone to structural blockage. Maintenance work is frequent and the equipment reliability is poor, which affects the treatment of various harmful substances in the system and causes serious equipment corrosion.

[0013] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0014] As a preferred solution of the new desulfurization wastewater treatment device and process described in the present invention, the treatment system includes a collection component, a pretreatment component arranged on the collection component, a separation component arranged on the pretreatment component, and a sampling component arranged on the pretreatment component.

[0015] As a preferred solution of the new desulfurization wastewater treatment device and process described in the present invention, the collection component includes a wastewater collection tank, a sewage outlet arranged on the wastewater collection tank, a lifting pump arranged inside the wastewater collection tank, a delivery pipe arranged on the lifting pump, and a flow regulating valve and a wastewater flow meter arranged on the delivery pipe.

[0016] As a preferred solution of the novel desulfurization wastewater treatment device and process described in the present invention, the pretreatment component includes a pre-sedimentation tank arranged at the other end of the conveying pipe, a scraper arranged inside the pre-sedimentation tank, and a scraper arranged at the output end of the scraper.

[0017] As a preferred solution of the new desulfurization wastewater treatment device and process described in the present invention, the separation component includes a discharge pipe arranged on the pre-sedimentation tank, an intermediate water tank arranged on the discharge pipe, a mixer arranged inside the intermediate water tank, an intermediate water pump arranged on the intermediate water tank, and a connecting pipe arranged on the intermediate water pump.

[0018] As a preferred solution of the novel desulfurization wastewater treatment device and process described in the present invention, the sampling component includes a sampling port arranged on the pre-sedimentation tank, a sludge discharge pump arranged at the bottom of the pre-sedimentation tank, and a dewatering machine arranged on the sludge discharge pump.

[0019] The beneficial effects of the present invention are as follows: wastewater is transported to a pre-sedimentation tank by a wastewater lifting pump, and organic sulfur is added to the pre-sedimentation tank so that the organic sulfur and the wastewater in the pre-sedimentation tank undergo a preliminary reaction, so that the upper clarified liquid is transported to an intermediate water tank, and the clarified liquid in the intermediate water tank is subjected to a secondary treatment by a mixer, so that particulate matter such as gypsum contained in the treated liquid is greatly reduced, so that the impurities in the clarified liquid are less, and at the same time, the cyclone will not be blocked, thereby greatly improving the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of the new desulfurization wastewater treatment device of the present invention.

[0022] Figure 2 It is a schematic diagram of the process structure of the novel desulfurization wastewater treatment process of the present invention. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0027] Example 1, reference Figure 1-2 , which is the first embodiment of the present invention, provides a new desulfurization wastewater treatment process. This device includes arranging two wastewater lifting pumps inside the wastewater collection tank; then installing the organic sulfur dosing system into the desulfurization wastewater pre-sedimentation tank, and then transporting the wastewater to the desulfurization wastewater pre-sedimentation tank through the wastewater lifting pump.

[0028] Preferably, part of the wastewater in the wastewater collection tank is transported to the desulfurization wastewater pre-sedimentation tank for preliminary sedimentation treatment through a wastewater lifting pump to separate some impurities in the wastewater, thereby reducing the working pressure of the subsequent intermediate water tank, thereby preventing a large amount of solid matter such as gypsum in the subsequent clarified liquid from being reduced, and preventing equipment clogging.

[0029] Furthermore, organic sulfur is added to the desulfurization wastewater pre-sedimentation tank through the organic sulfur dosing system, so that the substances in the wastewater separate the wastewater slurry according to density, and the clarified wastewater on the top is sent to the subsequent treatment device. At the same time, the scraper operates to continuously stir the sediment at the bottom to prevent sedimentation.

[0030] Among them, the corresponding chemical substances are added to the desulfurization wastewater pre-sedimentation tank through the organic sulfur dosing system, so that the wastewater in the desulfurization wastewater pre-sedimentation tank is pretreated, the harmful impurities in the wastewater are reduced, and the subsequent purification pressure is reduced.

[0031] Furthermore, the clean water treated in the desulfurization wastewater pre-sedimentation tank is transported to the triple-tank through the intermediate water pump of the intermediate water tank, and then subjected to subsequent treatment according to the traditional triple-tank treatment process.

[0032] In addition, after the upper clarified liquid treated in the desulfurization wastewater pre-sedimentation tank flows into the intermediate water tank, the pressure of the intermediate water tank purification drops greatly. By adding drugs to the clarified liquid again, further purification is carried out, which greatly reduces the impurities in the subsequent cyclone and prevents blockage.

[0033] In summary: by adding a pre-sedimentation tank before wastewater treatment and adding the corresponding organic sulfur to the wastewater, the wastewater can be initially separated, so that the wastewater that needs to be treated can be initially treated, so that the insoluble particles such as gypsum in the subsequent water quality can be reduced, and the cyclone will not be blocked.

[0034] Example 2, reference Figure 2 , which is the second embodiment of the present invention, is the second embodiment of the present invention, and provides a new desulfurization wastewater treatment device, which includes: one of the wastewater lifting pumps is used as a backup to prevent accidents from causing the equipment to fail to operate.

[0035] Among them, the provision of two lifting pumps can prevent the equipment from failing to operate when the lifting pump is damaged, so that the equipment can always operate normally.

[0036] Furthermore, the process of the organic sulfur dosing system is to prepare an appropriate amount of organic sulfur dosing agent, store it in a storage tank, mix the agent with water in a certain proportion, formulate it into a concentration suitable for treatment needs, and then transport it to the dosing point through a dosing pump. The organic sulfur dosing agent reacts chemically with the sulfide in the wastewater or flue gas to generate water-insoluble sulfide precipitate and other harmless substances.

[0037] Preferably, by mixing the reagent and water in a certain proportion, and then adding a corresponding amount of reagent by observing the wastewater content in the desulfurization wastewater pre-sedimentation tank, insoluble precipitates are generated in the wastewater, and the upper clarified liquid containing a small amount of impurities is transported to the intermediate water tank, reducing the purification pressure of the intermediate water tank.

[0038] Furthermore, the intermediate water tank can balance the changes in flow and load during the treatment process. When the water inlet fluctuates, the water tank can temporarily store clarified wastewater to ensure the stable operation of the entire system.

[0039] Preferably, the intermediate water tank is provided to further purify the pretreated wastewater, so that the remaining impurities in the wastewater are purified.

[0040] Furthermore, the triplex tank is mainly divided into three steps: pre-separation, flocculation adjustment and sedimentation clarification; secondly, it also includes oil scraping and skimming, sludge treatment and water quality monitoring steps.

[0041] Preferably, the pre-separation stage is mainly used to separate and remove floating oil and larger particulate matter in the wastewater; the flocculation adjustment stage is used to adjust the pH of the wastewater and add flocculants to promote the formation of flocs of suspended matter and emulsified oil; the sedimentation and clarification stage is used to precipitate and clarify flocs and suspended matter in the wastewater to separate clean water from sludge.

[0042] In summary: through the setting of two lifting pumps, the equipment can always operate normally; by mixing the reagent and water in a certain proportion, and then adding the corresponding amount of reagent by observing the wastewater content in the desulfurization wastewater pre-sedimentation tank, insoluble precipitates are generated in the wastewater, and the upper clarified liquid containing a small amount of impurities is transported to the intermediate water tank to reduce the purification pressure of the intermediate water tank. The setting of the intermediate water tank is used to further purify the pretreated wastewater, so that the remaining impurities in the wastewater are purified. After that, the pre-separation stage in the triple water tank is mainly used to separate and remove floating oil and larger particulate matter in the wastewater; the flocculation stage is used to adjust the pH of the wastewater, and add flocculants to promote the formation of flocs of suspended matter and emulsified oil; the sedimentation and clarification stage is used to precipitate and clarify the flocs and suspended matter in the wastewater to separate the clean water from the sludge.

[0043] Example 3, reference Figure 1 , which is the third embodiment of the present invention, comprises: a processing system 100, the processing system 100 comprises a collecting component 101, a pre-processing component 102 arranged on the collecting component 101, a separating component 103 arranged on the pre-processing component 102, and a sampling component 104 arranged on the pre-processing component 102.

[0044] Among them, the collection component 101 is configured to store wastewater that needs to be treated, and the pretreatment component 102 is configured to preliminarily purify the wastewater, so that the wastewater undergoes the first purification, and then the wastewater undergoes the second treatment through the separation component 103, and then the purified wastewater is converted into clean water.

[0045] Furthermore, the collection component 101 includes a wastewater collection tank 101a, a sewage outlet 101b arranged on the wastewater collection tank 101a, a lifting pump 101c arranged inside the wastewater collection tank 101a, a delivery pipe 101d arranged on the lifting pump 101c, and a flow regulating valve 101e and a wastewater flow meter 101f arranged on the delivery pipe 101d.

[0046] Among them, the wastewater lifting pump uses two self-priming pumps, whose parameters are: flow rate -30m3 / h, head 30m, motor power -30kw, stainless steel circular filter screen is set at the inlet, the outlet pipe is DN60PSP pipe, and the outlet valve is DN50 butterfly valve; the outlet is set with a pipeline flow meter with a range of 0-60m3 / h and a flow control valve 101e gate.

[0047] Furthermore, the pre-treatment component 102 includes a pre-sedimentation tank 102a disposed at the other end of the conveying pipe 101d, a mud scraper 102b disposed inside the pre-sedimentation tank 102a, and a scraper 102c disposed at the output end of the mud scraper 102b.

[0048] The pre-sedimentation tank 102a is used to initially precipitate the wastewater, and the scraper 102b continuously stirs the bottom sediment to prevent deposition, so that the wastewater is purified more thoroughly, and the scraper 102c is used to cooperate with the scraper 102b to stir the sediment.

[0049] Furthermore, the separation component 103 includes a discharge pipe 103a arranged on the pre-sedimentation tank 102a, an intermediate water tank 103b arranged on the discharge pipe 103a, a mixer 103c arranged inside the intermediate water tank 103b, an intermediate water pump 103d arranged on the intermediate water tank 103b, and a connecting pipe 103e arranged on the intermediate water pump 103d.

[0050] The discharge pipe 103a is used to transport the upper clarified liquid that has been pretreated in the pre-sedimentation tank 102a to the intermediate water tank 103b for further purification, and the intermediate water pump 103d is used to transport the secondary purified wastewater to the triple tank.

[0051] Furthermore, the sampling assembly 104 includes a sampling port 104a disposed on the pre-sedimentation tank 102a, a sludge discharge pump 104b disposed at the bottom of the pre-sedimentation tank 102a, and a dehydrator 104c disposed on the sludge discharge pump 104b.

[0052] The sampling port 104a is used to sample the liquid inside the pre-sedimentation tank 102a, and the sludge removal pump 104b is used to regularly remove the sediment inside the pre-sedimentation tank 102a, so that the sludge is sent into the dewatering machine 104c through the sludge removal pump 104b to discharge the liquid.

[0053] In summary: wastewater is transported to the pre-sedimentation tank 102a by a wastewater lifting pump, and organic sulfur is added to the pre-sedimentation tank 102a to cause a preliminary reaction between the organic sulfur and the wastewater in the pre-sedimentation tank 102a, so that the upper clarified liquid is transported to the intermediate water tank 103b, and then the clarified liquid in the intermediate water tank 103b is subjected to a secondary treatment by the mixer 103c, thereby greatly reducing the particulate matter such as gypsum contained in the treated liquid, thereby reducing the impurities in the clarified liquid, and at the same time, the cyclone will not be blocked, thereby greatly improving the treatment efficiency.

[0054] The remaining structure is the same as that of Example 2.

[0055] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​such as temperature, pressure, etc., installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or process step can be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0056] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A new desulfurization wastewater treatment process, characterized in that: include, S1. First, two wastewater lifting pumps are set inside the wastewater collection tank; then the organic sulfur dosing system is installed in the desulfurization wastewater pre-sedimentation tank (M), and then the wastewater is transported to the desulfurization wastewater pre-sedimentation tank (M) through the wastewater lifting pump; S2. Adding organic sulfur into the desulfurization wastewater pre-sedimentation tank (M) through the organic sulfur dosing system, so that the substances in the wastewater separate the wastewater slurry according to density, and the clarified wastewater at the top is sent to the subsequent treatment device. The scraper is operated at the same time to continuously stir the sediment at the bottom to prevent sedimentation; and, S3. The clean water treated in the desulfurization wastewater pre-sedimentation tank (M) is transported to the triple tank through the intermediate water pump of the intermediate water tank, and then subjected to subsequent treatment according to the traditional triple tank treatment process.

2. The novel desulfurization wastewater treatment process according to claim 1 is characterized in that: One of the wastewater lifting pumps is used as a backup to prevent accidents from causing the equipment to stop operating.

3. The novel desulfurization wastewater treatment process according to claim 2 is characterized in that: The process of the organic sulfur dosing system is to prepare an appropriate amount of organic sulfur dosing agent, store it in a storage tank, mix the agent with water in a certain proportion, adjust it into a concentration suitable for treatment needs, and then transport it to the dosing point through a dosing pump. The organic sulfur dosing agent reacts chemically with the sulfide in the wastewater or flue gas to generate water-insoluble sulfide precipitate and other harmless substances.

4. The novel desulfurization wastewater treatment process according to claim 3 is characterized in that: The intermediate water tank can balance the changes in flow and load during the treatment process. When the water inflow fluctuates, the water tank can temporarily store clarified wastewater to ensure the stable operation of the entire system.

5. The novel desulfurization wastewater treatment process according to claim 4 is characterized in that: The triple box is mainly divided into three steps: pre-separation, flocculation adjustment and sedimentation clarification; secondly, it also includes oil scraping and slag skimming, sludge treatment and water quality monitoring steps.

6. A new desulfurization wastewater treatment device, characterized in that: The method comprises a desulfurization wastewater pre-sedimentation tank (M) in a novel desulfurization wastewater treatment process according to any one of claims 1 to 5, and A processing system (100) includes a collection component (101), a pretreatment component (102) disposed on the collection component (101), a separation component (103) disposed on the pretreatment component (102), and a sampling component (104) disposed on the pretreatment component (102).

7. The novel desulfurization wastewater treatment device according to claim 6 is characterized in that: The collection component (101) comprises a wastewater collection tank (101a), a sewage outlet (101b) arranged on the wastewater collection tank (101a), a lifting pump (101c) arranged inside the wastewater collection tank (101a), a delivery pipe (101d) arranged on the lifting pump (101c), and a flow regulating valve (101e) and a wastewater flow meter (101f) arranged on the delivery pipe (101d).

8. The novel desulfurization wastewater treatment device according to claim 7 is characterized in that: The pretreatment component (102) comprises a pre-sedimentation tank (102a) arranged at the other end of the conveying pipe (101d), a mud scraper (102b) arranged inside the pre-sedimentation tank (102a), and a scraper (102c) arranged at the output end of the mud scraper (102b).

9. The novel desulfurization wastewater treatment device according to claim 8 is characterized in that: The separation component (103) comprises a discharge pipe (103a) arranged on the pre-sedimentation tank (102a), an intermediate water tank (103b) arranged on the discharge pipe (103a), a stirrer (103c) arranged inside the intermediate water tank (103b), an intermediate water pump (103d) arranged on the intermediate water tank (103b), and a connecting pipe (103e) arranged on the intermediate water pump (103d).

10. The novel desulfurization wastewater treatment device according to claim 9 is characterized in that: The sampling assembly (104) comprises a sampling port (104a) arranged on the pre-sedimentation tank (102a), a sludge discharge pump (104b) arranged at the bottom of the pre-sedimentation tank (102a), and a dehydrator (104c) arranged on the sludge discharge pump (104b).

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