A kind of wastewater advanced treatment equipment and process in pharmaceutical intermediate production

Abstract

The application discloses a kind of wastewater advanced treatment equipment and process in pharmaceutical intermediates production, it is related to pharmaceutical production wastewater treatment technical field.In the application: including waste liquid pool, treatment jar, separation box, circulation pipe, outer pipe and back liquid pipe, treatment jar is divided into upper and lower cavities, filter cartridge and lower discharge paddle are arranged in separation box.In the application, by conveying wastewater and medicament to treatment jar, start circulating system and lower discharge paddle to realize sufficient mixing reaction, then filter and shunt by separation box, clean liquid flows outer pipe, filter cartridge can be backwashed by back liquid pipe.The application can treat pharmaceutical intermediates production wastewater, can improve the uniformity of medicament and wastewater mixing and solid-liquid separation precision, filter cartridge can be cleaned without shutdown disassembly, adapt to industrialization continuous production demand.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pharmaceutical production wastewater treatment, and in particular to a wastewater advanced treatment device and process in pharmaceutical intermediate production. BACKGROUND

[0002] In the production process of pharmaceutical intermediates, wastewater with complex components, high pollutant concentration and difficult-to-degrade substances is generated. If such wastewater is directly discharged without deep treatment, it can cause serious pollution to the environment such as water bodies and soil. Therefore, special equipment is needed for purification treatment to meet the discharge standards. At present, the pharmaceutical intermediate wastewater treatment equipment on the market still has many deficiencies in actual application, and it is difficult to meet the efficient and stable deep treatment requirements.

[0003] Firstly, the mixing effect of the existing equipment is poor: the mixing method is mainly single stirring or natural mixing, and the liquid is prone to stratification, which leads to uneven contact between the reagent and the wastewater, and insufficient reaction. This not only reduces the pollutant removal efficiency, but also may increase the treatment cost due to excessive reagent in some local areas, or affect the quality of the final effluent due to insufficient reagent in some local areas, making it difficult to achieve precise deep treatment.

[0004] Secondly, the separation precision is low and easy to block: most of the equipment only uses a single filter structure for separation, and a large amount of sediment is easy to adhere to the surface of the filter element, causing blockage.

[0005] Thirdly, the filter element is inconvenient to maintain and affects continuous production: the filter cartridge and other filter elements of the existing equipment need to be disassembled for manual cleaning or replacement after shutdown, which not only consumes manpower and resources, but also causes the equipment to be out of service for a long time, which cannot adapt to the needs of industrial continuous production and greatly reduces the overall processing efficiency.

[0006] In summary, in the face of the above common phenomena in the treatment of pharmaceutical intermediate production wastewater, how to overcome them has become a technical problem to be solved. SUMMARY

[0007] To solve the above technical problems, the present application is realized by the following technical scheme:

[0008] The present application provides a wastewater advanced treatment device in pharmaceutical intermediate production, which comprises a waste liquid pool, a liquid supply pipe connected downstream of the waste liquid pool, a liquid supply electric control valve arranged on the liquid supply pipe, a treatment tank connected downstream of the liquid supply pipe, a dosing pipe connected to the treatment tank, a dosing electric control valve arranged on the dosing pipe, an inner partition plate arranged in the treatment tank, a lower cavity arranged below the inner partition plate, an upper cavity arranged above the inner partition plate, a liquid level height sensor arranged on the treatment tank for monitoring the internal liquid level, a plurality of separation boxes fixedly installed on the inner partition plate, a circulation pipe arranged outside the treatment tank and communicating the lower cavity and the upper cavity, and a circulation pump arranged on the circulation pipe.

[0009] The separation box comprises a partition plate, a sinking cavity below the partition plate, and an upflow cavity above the partition plate, the separation box is provided with an inlet communicating the sinking cavity and the upflow cavity, the partition plate is provided with a plurality of filter cartridges communicating the sinking cavity and the upflow cavity, the bottom of the separation box is further provided with a lower cone channel extending into the sinking cavity, and the sinking cavity is provided with a lower row of paddles driven by a motor, and the direction of the lower row of paddles is towards the lower cone channel.

[0010] The separation box is connected with a discharge pipe, the discharge pipe is in communication with the upflow cavity, an external delivery pipe is arranged outside the treatment tank, the discharge pipe is connected with the external delivery pipe, the external delivery pipe is provided with an external delivery electric control valve and a discharge liquid pump, a downstream port of the external delivery pipe is inserted into a liquid discharge pool, and the external delivery pipe is further connected with a liquid return pipe, the liquid return pipe is provided with a liquid return pump and a liquid return electric control valve.

[0011] As a preferred technical scheme of the wastewater advanced treatment equipment, the position of the liquid supply pipe connecting port with the wastewater pool is higher than the position of the liquid supply pipe connecting port with the treatment tank, the upstream of the dosing pipe is connected with a medicament supply device, and the connecting position of the circulation pipe with the liquid supply pipe is located downstream of the liquid supply electric control valve.

[0012] As a preferred technical scheme of the wastewater advanced treatment equipment, the bottom of the lower cavity of the treatment tank is provided with a support beam for supporting the rotation of the rotating shaft, a sinking part is arranged below the support beam and a sewage discharge port is arranged, and a collection tank is arranged below the sewage discharge port.

[0013] As a preferred technical scheme of the wastewater advanced treatment equipment, the connecting position of the circulation pipe with the treatment tank is higher than the opening position of the bottom of the lower cone channel.

[0014] As a preferred technical scheme of the wastewater advanced treatment equipment, the horizontal position of the filter cartridge of the separation box is not lower than the horizontal position of the inlet of the separation box, and the horizontal position of the lower row of paddles of the separation box is lower than the horizontal position of the inlet of the separation box.

[0015] As a preferred technical scheme of the wastewater advanced treatment equipment, a top frame is arranged above the treatment tank, the motor is fixed in an inverted manner at the position of the top frame, the output end of the motor faces downward and is connected with the rotating shaft, and the rotating shaft is movably inserted into the separation box and connected with the lower row of paddles in the separation box.

[0016] As a preferred technical scheme of the wastewater advanced treatment equipment, the external delivery electric control valve and the discharge liquid pump of the external delivery pipe are located in the region between the upstream and downstream communication ports of the liquid return pipe and the external delivery pipe.

[0017] The present application provides a wastewater advanced treatment process in the production of a pharmaceutical intermediate, which comprises the following contents:

[0018] Link one: open the liquid supply electric control valve, so that the wastewater in the wastewater pool is transported to the upflow cavity of the treatment tank through the liquid supply pipe.

[0019] Link two: open the dosing electric control valve, and add wastewater treatment medicament to the upflow cavity of the treatment tank through the dosing pipe.

[0020] Step three, the liquid level sensor monitors the liquid level in the treatment tank, when the liquid level reaches the preset maximum height, the liquid supply electric control valve and the dosing electric control valve are closed.

[0021] Step four, the circulating pump is started, and the liquid in the lower cavity of the treatment tank flows back to the upper cavity of the treatment tank through the circulating pipe.

[0022] Step five, the motor is started to drive the rotation of the lower row of paddles in the separation box, assisting the stirring of the mixed liquid.

[0023] Step six, the circulating pump and the lower row of paddles are kept running to ensure that the wastewater and the medicament are fully mixed and reacted.

[0024] Step seven, the external discharge electric control valve is opened and the discharge liquid pump is started, the mixed liquid containing a large amount of sediment enters the lower cavity through the lower cone channel, and the mixed liquid containing a small amount of sediment is filtered through the filter cartridge, then is discharged to the liquid discharge tank through the discharge pipe and the external discharge pipe.

[0025] Step eight, when the liquid level sensor detects that the liquid level is lower than the preset minimum height, the discharge liquid pump is closed, and the liquid supply electric control valve and the dosing electric control valve are reopened.

[0026] Step nine, when the filter cartridge needs to be cleaned, the discharge liquid pump and the external discharge electric control valve are closed, the liquid return electric control valve is opened, and the liquid return pump is started, and the clean liquid in the liquid discharge tank is used to reverse flush the filter cartridge.

[0027] Compared with the existing technology, the beneficial effects of the present application are:

[0028] 1. The circulating pump in the present application drives the liquid in the lower cavity to flow back to the upper cavity, forming a circulating flow path, cooperating with the lower row of paddles to stir, breaking the liquid static stratification, ensuring that the medicament and wastewater are uniformly contacted, and the separation box is provided with a "sinking cavity + upflow cavity + filter cartridge" structure, combined with the directional pushing of the lower row of paddles, realizing the diversion of the mixed liquid: a large amount of sediment is pushed by the lower row of paddles and enters the sinking part of the lower cavity through the lower cone channel, and a small amount of sediment is filtered through the filter cartridge, and the clean liquid is directly discharged, avoiding the blockage of the sediment or the discharge of the clean liquid, improving the separation precision, and at the same time, the connecting position of the circulating pipe is higher than the bottom of the lower cone channel, preventing the sediment in the sinking part from flowing back to the upper cavity, and further ensuring the separation effect.

[0029] 2. The filter cartridge in the present application adopts reverse flushing design, which can flush the blockage by using the clean liquid in the liquid discharge tank without disassembly, reducing the cost of manual disassembly and replacement, and realizing seamless connection between the treatment and flushing modes through valve switching of the external discharge and liquid return systems, reducing the equipment downtime, and adapting to the wastewater treatment demand of industrial continuous production. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the overall structure schematic diagram of the wastewater deep treatment equipment in the present application.

[0031] Figure 2 Structure schematic diagram of the processing tank and its upstream and downstream pipelines in the application.

[0032] Figure 3 Structure schematic diagram of the processing tank and its upstream and downstream pipelines in the application. Figure 2 Structure schematic diagram of the processing tank and its upstream and downstream pipelines in the application.

[0033] Figure 4 Structure schematic diagram of the processing tank and its upstream and downstream pipelines in the application. Figure 3 Structure schematic diagram of the processing tank and its upstream and downstream pipelines in the application.

[0034] Figure 5 Liquid flow circulation schematic diagram of the processing tank in the application when the waste liquid and the reagent are fully mixed and reacted.

[0035] Figure 6 Schematic diagram of the separation box filtering and distributing the liquid flow after the mixed reaction in the application.

[0036] Figure 7 State schematic diagram of the external delivery pipe guiding the liquid to the liquid discharge pool in the application.

[0037] Figure 8 Reverse liquid supply state schematic diagram of the external delivery pipe when cleaning the filter cartridge in the application.

[0038] 1-waste liquid pool, 101-liquid supply pipe, 102-circulation pipe, 103-reagent adding pipe, 104-liquid supply electric control valve, 105-reagent adding electric control valve, 106-circulation pump; 2-processing tank, 201-inner partition plate, 202-lower cavity, 203-upper cavity, 204-separation box, 2041-separation plate, 2042-sink cavity, 2043-upper flow cavity, 2044-inlet, 2045-filter cartridge, 2046-lower discharge paddle, 2047-lower cone passage, 205-supporting beam, 206-sink part, 207-discharge pipe, 208-liquid level height sensor; 3-collecting tank; 4-top frame; 5-motor; 6-rotating shaft; 7-external delivery pipe, 701-external delivery electric control valve; 8-discharge liquid pump; 9-liquid discharge pool; 10-liquid return pipe, 1001-liquid return electric control valve; 11-liquid return pump. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the application more clear and understandable, the application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the application and do not limit the application.

[0040] Example 1

[0041] The wastewater advanced treatment equipment in the application mainly consists of eight modules of waste liquid storage and liquid supply system, treatment tank system, circulating system, dosing system, separation system, external transport and backflow system, sewage and collection system and monitoring and driving system, and the structure and connection relationship of each module are as follows:

[0042] (I) combination Figure 1 , Figure 2 , waste liquid storage and liquid supply system, which is responsible for storing wastewater to be treated and transporting it to the treatment tank, mainly including the following components:

[0043] Waste liquid pool 1 is used for temporarily storing wastewater generated in the production process of pharmaceutical intermediates, and providing stable liquid source for subsequent treatment.

[0044] Liquid supply pipe 101 is connected with waste liquid pool 1 at one end and connected with treatment tank 2 at the other end, which is the conveying channel of wastewater from waste liquid pool 1 to treatment tank 2. Among them, the connection port position of liquid supply pipe 101 with waste liquid pool 1 is higher than that with treatment tank 2, which can assist the flow of wastewater by means of liquid level difference.

[0045] Liquid supply electric control valve 104 is installed on liquid supply pipe 101, which is used to control the on-off of liquid supply pipe 101, realizing the automatic control of wastewater transportation.

[0046] (II) combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , the treatment tank system is the core place of wastewater and reagent reaction and separation, and the core structure includes:

[0047] Treatment tank 2 is a closed container, which is the core reaction container for wastewater treatment, and the inside is divided into different functional areas by inner partition plate 201.

[0048] Inner partition plate 201 is fixedly installed in the inside of treatment tank 2, which divides the internal space of treatment tank 2 into two parts, namely lower cavity 202 and upper cavity 203.

[0049] Lower cavity 202 is located below inner partition plate 201, which is mainly used for temporarily storing mixed liquid with a large amount of sediment, and at the same time provides a backflow liquid source for the circulating system.

[0050] Upper cavity 203 is located above inner partition plate 201, which is the main area of preliminary mixing and reaction of wastewater and reagent, and provides the filtered liquid to the separation system.

[0051] The liquid level sensor 208 is installed on the processing tank 2 to monitor the liquid level inside the processing tank 2 in real time. By detecting the distance of the liquid surface downwards and combining it with the specifications and dimensions of the processing tank 2, the liquid level sensor 208 can directly calculate the actual liquid level inside the processing tank 2, providing a signal basis for starting and stopping steps such as liquid supply, reaction, and drainage.

[0052] The support truss 205 is fixed to the bottom of the lower cavity 202 of the processing tank 2 and is used to rotate the support shaft 6 to ensure that the shaft 6 remains stable when driving the lower row of blades 2046 to rotate.

[0053] The recessed part 206, located below the support truss 205, is a recessed area at the bottom of the lower cavity 202 of the treatment tank 2. It is used to collect the precipitated solid impurities. The recessed part 206 is equipped with a drain port, which can discharge the precipitate from the treatment tank 2.

[0054] The top frame 4 is set above the processing tank 2 and serves as the mounting carrier for the motor 5. The motor 5 is fixed upside down on the top frame 4, ensuring that the output end of the motor 5 faces downward and is connected to the rotating shaft 6.

[0055] (III) Combination Figure 1 , Figure 2 , Figure 4 , Figure 5 The circulation system is used to achieve the circulating flow of liquid in treatment tank 2, improving the mixing uniformity of wastewater and reagents. Its main structure includes:

[0056] The circulation pipe 102 is connected at one end to the lower chamber 202 of the treatment tank 2 and at the other end to the upper chamber 203 of the treatment tank 2. It is also connected to the liquid supply pipe 101 (the connection position is located downstream of the liquid supply solenoid valve 104), forming a circulation path of "lower chamber 202 → circulation pipe 102 → upper chamber 203". The connection position of the circulation pipe 102 to the treatment tank 2 is higher than the bottom opening position of the lower cone channel 2047 to avoid drawing a large amount of sediment in the sinking part 206 back to the upper chamber 203.

[0057] The circulation pump 106, installed on the circulation pipe 102, provides power for liquid circulation and can pump the liquid in the lower chamber 202, which is at a horizontal position higher than the bottom opening of the lower conical channel 2047, back to the upper chamber 203, so as to realize the continuous circulation of liquid.

[0058] (iv) Combination Figure 1 , Figure 2 The dosing system is used to precisely add wastewater treatment agents into treatment tank 2, and its main structure includes:

[0059] The dosing pipe 103 is connected at one end to the treatment tank 2 and at the other end to an external chemical supply device, serving as the delivery channel for the chemical to enter the treatment tank 2.

[0060] The dosing solenoid valve 105 is installed on the dosing pipe 103 and is used to control the opening and closing of the dosing pipe 103. The amount, timing, and state of the added agent can be adjusted according to the composition and concentration of the waste liquid in the waste liquid tank 1 and the supply rate of the supply pipe 101.

[0061] (v) Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 The separation system is used for solid-liquid separation of the reaction mixture. The core structure is the separation box 204, which specifically includes:

[0062] The separation box 204, which is installed on the inner partition 201, is the core component for solid-liquid separation. Its interior is divided into different functional chambers by the partition plate 2041.

[0063] The partition plate 2041 is fixed inside the separation box 204, dividing the internal space of the separation box 204 into two parts, namely the lower cavity 2042 and the upper cavity 2043.

[0064] The sinking chamber 2042, located below the partition plate 2041, is used to temporarily store the mixture containing a large amount of sediment; the lower discharge blade 2046 is installed in the sinking chamber 2042 and can push the sediment downward.

[0065] The upper flow chamber 2043, located above the partition plate 2041, provides clean liquid flow to the external delivery pipe 7 after the discharge pump 8 is started.

[0066] Inlet 2044 is located on the side wall of separation box 204. One end is connected to the upper cavity 203 of processing tank 2, and the other end is connected to the lower cavity 2042 of separation box 204. It is used to introduce the mixed liquid in the upper cavity 203 into the lower cavity 2042.

[0067] Filter cartridges 2045, multiple filter cartridges 2045 are fixed on partition plate 2041, with the upper end connected to the upper flow chamber 2043 and the lower end connected to the lower settling chamber 2042, used to filter solid precipitates in the mixed liquid. The horizontal position of the filter cartridges 2045 is not lower than the horizontal position of the inlet 2044, ensuring that the liquid entering the upper flow chamber 2043 can flow through the filter cartridges 2045.

[0068] The lower impeller 2046 is installed in the settling chamber 2042 of the separation box 204, connected to the rotating shaft 6, and driven to rotate by the motor 5. The discharge direction of the lower impeller 2046 is towards the lower conical channel 2047, which can push the sediment in the settling chamber 2042 downward. The horizontal position of the lower impeller 2046 is lower than the horizontal position of the inlet 2044.

[0069] The lower conical channel 2047 is located at the bottom of the separation box 204. Its upper end is connected to the lower settling chamber 2042, and its lower end extends into the lower chamber 202 of the processing tank 2. It is used to guide the sediment in the lower settling chamber 2042 into the lower chamber 202.

[0070] The discharge pipe 207 is connected at one end to the upper flow chamber 2043 of the separation box 204 and at the other end to the external delivery pipe 7, and is used to transport the clean liquid flow filtered by the filter cartridge 2045 to the external delivery pipe 7.

[0071] (vi) Combination Figure 1 , Figure 2 , Figure 7 , Figure 8 The external and return system is responsible for delivering the filtered clean liquid to the drainage tank, and simultaneously performing backwashing in cleaning mode. Its core structure includes:

[0072] The external delivery pipe 7 is connected at one end to the discharge pipe 207 and the other end is inserted into the drainage pool 9. It is the channel through which clean liquid is transported from the separation box 204 to the drainage pool 9.

[0073] The external discharge solenoid valve 701 is installed on the external discharge pipe 7 and is used to control the opening and closing of the external discharge pipe 7 to realize the control of the external discharge of clean liquid.

[0074] The discharge pump 8 is installed on the external discharge pipe 7 to provide power for the external discharge of clean liquid. The external discharge solenoid valve 701 and the discharge pump 8 are located in the area between the upstream and downstream connection ports of the return pipe 10 and the external discharge pipe 7.

[0075] The return pipe 10 is connected at one end to the external output pipe 7 and at the other end to the drain pool 9. It is the channel for the clean liquid to be backwashed in the cleaning mode.

[0076] The return liquid solenoid valve 1001 is installed on the return liquid pipe 10 and is used to control the opening and closing of the return liquid pipe 10 to realize the control of reverse flushing.

[0077] The return pump 11, installed on the return pipe 10, provides power for backwashing in cleaning mode and can reverse the flow of clean liquid in the drain tank 9 to the separation box 204.

[0078] (vii) Combination Figure 1 , Figure 2 , Figure 8 The sewage discharge and collection system is responsible for collecting sediment generated during the treatment process. Its core structure includes:

[0079] The drain outlet is located on the bottom side of the sinking part 206 of the treatment tank 2, and is used to discharge the sediment collected in the sinking part 206 into the treatment tank 2.

[0080] Collection tank 3 is located below the drain outlet and is used to collect sediment discharged from the drain outlet.

[0081] (viii) Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 The monitoring and drive system provides power and monitoring signals for equipment operation. Its main structure includes:

[0082] Motor 5 is fixed upside down on top frame 4, with its output end facing down and connected to rotating shaft 6, which can drive rotating shaft 6 to rotate the lower row of blades 2046.

[0083] The upper end of the rotating shaft 6 is connected to the output end of the motor 5, and the other end is movably inserted into the separation box 204 and connected to the lower row of blades 2046 to transmit the power of the motor 5.

[0084] The liquid level sensor 208 is used to monitor the liquid level in the processing tank 2 in real time and provide signals for the start and stop of each step.

[0085] Example 2: The wastewater deep treatment process designed in this invention mainly includes two parts: a normal treatment process and a cleaning mode. The specific steps are as follows:

[0086] (a) Normal processing procedure

[0087] 1. Waste liquid and reagent input

[0088] The production wastewater is first discharged into the waste liquid pool 1 for temporary storage. When the treatment tank 2 needs to be replenished with waste liquid, the control system opens the liquid supply solenoid valve 104, and the wastewater in the waste liquid pool 1 is transported to the upper chamber 203 of the treatment tank 2 through the liquid supply pipe 101 under the assistance of the liquid level difference and the subsequent circulation pump 106.

[0089] Simultaneously, the control system opens the dosing valve 105, and the external chemical supply equipment adds wastewater treatment chemicals to the upper chamber 203 of the treatment tank 2 through the dosing pipe 103. The amount of chemicals added needs to be determined comprehensively based on the composition and concentration of the waste liquid in the waste liquid tank 1 and the supply rate of the supply pipe 101 to ensure that the chemicals and wastewater are mixed in the optimal ratio.

[0090] 2. Liquid level monitoring and feed stop

[0091] The liquid level sensor 208 monitors the liquid level in the treatment tank 2 in real time and transmits the data to the control system. When the liquid level in the treatment tank 2 reaches the preset maximum height H... max When this occurs, the control system closes the liquid supply solenoid valve 104 and the chemical dosing solenoid valve 105, stopping the input of waste liquid and chemicals.

[0092] 3. Cyclic Mixed Reaction

[0093] After feeding stops, the control system starts the circulation pump 106 and the motor 5. Once the circulation pump 106 starts, it draws the liquid in the lower chamber 202 of the treatment tank 2 back to the upper chamber 203 through the circulation pipe 102, forming a circulation path of "upper chamber 203 → lower chamber 202 → circulation pipe 102 → upper chamber 203". After the motor 5 starts, it drives the lower impeller 2046 in the separation box 204 to rotate via the rotating shaft 6. The lower impeller 2046 pushes the liquid in the lower settling chamber 2042 to flow, further agitating the mixture. Under the combined action of the circulation pump 106 and the lower impeller 2046, the wastewater and reagents are fully mixed and react, with the reaction time preset according to the wastewater treatment requirements.

[0094] 4. Filtration, diversion, and external discharge

[0095] After the reaction reaches the preset time, the control system opens the external power control valve 701 and starts the discharge pump 8. At this time, the mixed liquid in the treatment tank 2 flows in two parts.

[0096] Part 1: The mixture containing a large amount of precipitated sediment is pushed downwards from the lower chamber 2042 through the lower conical channel 2047 into the lower chamber 202 of the treatment tank 2 by the downward thrust of the lower discharge blade 2046, and finally collects in the lower settling section 206. During this process, the circulation pump 106 runs continuously, pumping the liquid (without a large amount of sediment) in the lower chamber 202, whose horizontal position is higher than the bottom opening of the lower conical channel 2047, back to the upper chamber 203, thus preventing a large amount of sediment from flowing back into the upper chamber 203.

[0097] Part Two: The mixed liquid containing a small amount of sediment, under the upward suction of the discharge pump 8, flows from the upper chamber 203 of the treatment tank 2 through inlet 2044 into the lower chamber 2042 of the separation box 204. Subsequently, the mixed liquid flows through the filter cartridge 2045, where the small amount of sediment is trapped in the lower chamber 2042. The filtered clean liquid then enters the upper chamber 2043 and flows through the discharge pipe 207 into the external discharge pipe 7. Driven by the discharge pump 8, the clean liquid is transported through the external discharge pipe 7 to the discharge tank 9, completing the discharge process of one wastewater treatment cycle.

[0098] 5. Liquid level replenishment and circulation treatment

[0099] As the clean liquid is discharged, the liquid level in treatment tank 2 gradually decreases. When the liquid level sensor 208 detects that the liquid level is below the preset minimum height H... min Time (H) minIt is necessary to ensure that there is still enough liquid in the upper chamber 2043 of the separation box 204 to avoid the discharge pump 8 running dry. The control system shuts down the discharge pump 8 (some liquid with high turbidity remains in the sink, which can be discharged to the collection tank 3 according to the actual situation, or discharged to the collection tank 3 after several repeated treatment processes). The liquid supply control valve 104 and the chemical dosing control valve 105 are reopened, and the above steps 1 to 4 are repeated to achieve continuous deep treatment of wastewater.

[0100] (II) Cleaning Mode (Filter Cartridge Cleaning Procedure)

[0101] As the number of treatment cycles increases, a large amount of sediment will accumulate on the surface of filter cartridge 2045, leading to a decrease in filtration efficiency. When filter cartridge 2045 reaches its maximum operating time or when the filtration resistance of filter cartridge 2045 reaches a preset threshold (for example, based on the operating torque parameters of the discharge pump), the equipment enters cleaning mode. The specific steps are as follows:

[0102] The control system shuts down the discharge pump 8 and the external discharge solenoid valve 701, cutting off the external discharge path of the clean liquid.

[0103] The control system opens the return liquid control valve 1001 and starts the return liquid pump 11. The return liquid pump 11 delivers the clean liquid in the drain pool 9 to the external output pipe 7 through the return liquid pipe 10, and then guides it in reverse through the discharge pipe 207 into the upper flow chamber 2043 of the separation box 204.

[0104] The clean liquid flowing in the opposite direction washes the filter cartridge 2045 downward from the upper flow chamber 2043, flushing away the blockages attached to the surface of the filter cartridge 2045 and entering the lower sink chamber 2042 of the separation box 204.

[0105] The blockage flows with the flushing fluid in the sinking chamber 2042, enters the lower chamber 202 of the treatment tank 2 through the lower cone channel 2047, and finally collects in the sinking section 206.

[0106] After cleaning, the control system shuts off the return pump 11 and the return solenoid valve 1001, and opens the drain valve to discharge the sediment (including flushed blockages) in the settling section 206 into the collection tank 3. After the discharge is completed, the equipment returns to the normal treatment process, awaiting the next wastewater treatment.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater deep treatment device for the production of pharmaceutical intermediates, comprising a waste liquid tank (1), a supply pipe (101) connected downstream of the waste liquid tank (1), the supply pipe (101) being equipped with a supply solenoid valve (104), a treatment tank (2) connected downstream of the supply pipe (101), the treatment tank (2) also being connected to a dosing pipe (103), the dosing pipe (103) being equipped with a dosing solenoid valve (105), characterized in that: The processing tank (2) includes an inner partition (201), a lower chamber (202) located below the inner partition (201), and an upper chamber (203) located above the inner partition (201). The processing tank (2) is equipped with a liquid level sensor (208) for monitoring the internal liquid level. Multiple separation boxes (204) are fixedly installed on the inner partition (201). A circulation pipe (102) connecting the lower chamber (202) and the upper chamber (203) is also provided outside the processing tank (2). The circulation pipe (102) is equipped with a circulation pump (106). The separation box (204) includes a partition plate (2041), a sinking cavity (2042) located below the partition plate (2041), and an upper flow cavity (2043) located above the partition plate (2041). The separation box (204) has an inlet (2044) connecting the sinking cavity (2042) and the upper cavity (203). The partition plate (2041) has multiple filter cartridges (2045) connecting the sinking cavity (2042) and the upper flow cavity (2043). The bottom of the separation box (204) also has a lower conical channel (2047) extending into the lower cavity (202). The sinking cavity (2042) is equipped with a lower discharge blade (2046) driven by a motor (5). The discharge direction of the lower discharge blade (2046) is towards the lower conical channel (2047). The separation box (204) is connected to the discharge pipe (207), the discharge pipe (207) is connected to the upper flow chamber (2043), the processing tank (2) is externally configured with an external discharge pipe (7), the discharge pipe (207) is connected to the external discharge pipe (7), the external discharge pipe (7) is configured with an external discharge solenoid valve (701) and a discharge pump (8), the downstream end of the external discharge pipe (7) is inserted into the discharge pool (9), the external discharge pipe (7) is also connected to a return pipe (10), the return pipe (10) is configured with a return pump (11) and a return solenoid valve (1001).

2. The wastewater deep treatment equipment for the production of pharmaceutical intermediates according to claim 1, characterized in that: The connection point between the liquid supply pipe (101) and the waste liquid tank (1) is higher than the connection point between the liquid supply pipe (101) and the treatment tank (2). The upstream of the dosing pipe (103) is connected to the agent supply equipment. The connection point between the circulation pipe (102) and the liquid supply pipe (101) is located downstream of the liquid supply electric control valve (104).

3. The wastewater deep treatment equipment for the production of pharmaceutical intermediates according to claim 1, characterized in that: The bottom of the lower cavity (202) of the treatment tank (2) is provided with a support truss (205) for supporting the rotation of the rotating shaft (6). A sinking part (206) is provided below the support truss (205) and a drain outlet is provided. A collection tank (3) is arranged below the drain outlet.

4. The wastewater deep treatment equipment for the production of pharmaceutical intermediates according to claim 1, characterized in that: The connection point between the circulation pipe (102) and the treatment tank (2) is higher than the bottom opening of the lower conical channel (2047).

5. The wastewater deep treatment equipment for the production of pharmaceutical intermediates according to claim 1, characterized in that: The horizontal position of the filter cartridge (2045) of the separation box (204) is not lower than the horizontal position of its inlet (2044); The lower row of blades (2046) of the separation box (204) is horizontally lower than the horizontal position of its inlet (2044).

6. The wastewater deep treatment equipment for the production of pharmaceutical intermediates according to claim 1, characterized in that: A top frame (4) is provided above the processing tank (2). The motor (5) is fixed upside down in the position of the top frame (4). The output end of the motor (5) faces downward and is connected to the rotating shaft (6). The rotating shaft (6) is movably inserted into the separation box (204) and connected to the lower row of blades (2046) inside the separation box (204).

7. The wastewater deep treatment equipment for the production of pharmaceutical intermediates according to claim 1, characterized in that: The external power control valve (701) and the discharge pump (8) of the external pipe (7) are located in the area between the upstream and downstream connection ports of the return pipe (10) and the external pipe (7).

8. A treatment process applied to the wastewater deep treatment equipment according to any one of claims 1 to 7, characterized in that, Includes the following: Step 1: Open the liquid supply electric control valve (104) to allow the wastewater in the waste liquid pool (1) to be transported to the upper chamber (203) of the treatment tank (2) through the liquid supply pipe (101). Step 2: Open the dosing control valve (105) and add wastewater treatment agent into the upper chamber (203) of the treatment tank (2) through the dosing pipe (103); Step 3: Monitor the liquid level in the treatment tank (2) using the liquid level height sensor (208). When the liquid level reaches the preset maximum height, close the liquid supply control valve (104) and the chemical dosing control valve (105). Step 4: Start the circulation pump (106) to allow the liquid in the lower chamber (202) of the treatment tank (2) to flow back to the upper chamber (203) of the treatment tank (2) through the circulation pipe (102). Step 5: Start the motor (5) to drive the lower row of paddles (2046) in the separation box (204) to rotate, and assist in stirring the mixture; Step 6: Keep the circulating pump (106) and the lower discharge impeller (2046) running to ensure that the wastewater and the reagent are fully mixed and reacted; Step 7: Open the external power control valve (701) and start the discharge pump (8). The mixed liquid containing a large amount of sediment enters the lower chamber (202) through the lower cone channel (2047). The mixed liquid containing a small amount of sediment is filtered through the filter cartridge (2045) and then transported to the discharge tank (9) through the discharge pipe (207) and the external power supply pipe (7). Step 8: When the liquid level sensor (208) detects that the liquid level is lower than the preset minimum height, the discharge pump (8) is turned off and the liquid supply control valve (104) and the chemical dosing control valve (105) are turned on again. Step 9: When the filter cartridge (2045) needs to be cleaned, turn off the discharge pump (8) and the external power control valve (701), open the return power control valve (1001) and start the return pump (11), and use the clean liquid flow in the discharge pool (9) to backwash the filter cartridge (2045).

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