Paracetamol wastewater treatment system

Abstract

The utility model discloses a paracetamol wastewater treatment system which is characterized in that the system comprises a cooling pond, a first membrane separation device, a reaction pond, a collection pond, a cooling crystallizer and a centrifugal machine are sequentially connected behind the cooling pond, and the centrifugal machine obtains refined products, a liquid outlet of the cooling crystallizer is communicated with a first buffer tank through a mother liquor collecting pool, an ultrafiltration device and a membrane concentration device are sequentially mounted behind the first buffer tank, a liquid outlet of the membrane concentration device is communicated with a second buffer tank, and a resin adsorption tower, a third buffer tank and a second membrane separation device are sequentially connected behind the second buffer tank; the water production end of the resin adsorption tower is respectively connected with the first membrane separation device and the initial paracetamol crude product end, the concentrated water end of the second membrane separation device is connected with the first membrane separation device, and concentrated liquid of the membrane concentration device is injected into the cooling crystallizer.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and in particular relates to a paracetamol wastewater treatment system. Background Art

[0002] Wastewater produced by the pharmaceutical industry accounts for a considerable proportion of the total industrial wastewater, and the total amount of pollutant emissions also accounts for a considerable proportion. According to their characteristics, drugs can be divided into four categories: antibiotics, organic drugs, inorganic drugs and Chinese herbal medicines. The composition of wastewater targeted by pharmaceutical wastewater treatment is very complex. Among them, paracetamol wastewater is difficult to be biodegraded, which poses a great potential risk to the environment and humans. At the same time, the amount of water used in the treatment of paracetamol wastewater is relatively large, and the wastewater recovery rate is low. Summary of the invention

[0003] The purpose of the utility model is to design a paracetamol wastewater treatment system, which can improve the purity of refined products, reduce the discharge of waste liquid from sewage stations, and at the same time reduce the use of water in production lines, so that products and wastewater can be fully utilized as resources, achieve energy conservation and emission reduction, and turn waste into treasure.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A paracetamol wastewater treatment system, characterized in that: the system comprises a cooling pool, the rear of the cooling pool is connected in sequence to a first membrane separation device, a reaction pool, a collection pool, a cooling crystallizer and a centrifuge, the centrifuge obtains a refined product, wherein the discharge port of the cooling crystallizer is connected to the first buffer tank through the mother liquor collection pool, an ultrafiltration device and a membrane concentration device are sequentially installed behind the first buffer tank, the discharge port of the membrane concentration device is connected to the second buffer tank, the second buffer tank is sequentially connected to a resin adsorption tower, a third buffer tank and a second membrane separation device, the water production end of the resin adsorption tower is respectively connected to the first membrane separation device and the initial paracetamol crude product end, the concentrated water end of the second membrane separation device is connected to the first membrane separation device, and the concentrated liquid of the membrane concentration device is injected into the cooling crystallizer.

[0006] Further, sodium metabisulfite is added into the reaction tank.

[0007] Further, the produced water of the membrane concentration device is introduced into the initial crude product or the first membrane separation device.

[0008] Furthermore, the bottom of the cooling crystallization tower is connected to a centrifuge, and the water outlet of the cooling crystallization tower is connected to a crystallization mother liquor collection pool.

[0009] Furthermore, the membrane concentration device is provided with a conductivity meter and a pH meter.

[0010] Furthermore, the membrane concentration device is provided with a three-way water outlet.

[0011] The following beneficial effects can be obtained through the above technical solution:

[0012] The system provided by the utility model improves the purity of refined products and reduces the discharge of waste liquid from sewage stations after being processed by a centrifuge. The water produced by the membrane concentration device can be returned to the production line, reducing the water consumption of the production line, making full use of products and wastewater as resources, achieving energy conservation and emission reduction, and turning waste into treasure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a processing system relationship diagram. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] like Figure 1 As shown, a paracetamol wastewater treatment system comprises a cooling pool 1, and the cooling pool is connected to the first membrane separation device 2, the reaction pool 3, the collection pool 4, the cooling crystallizer 5 and the centrifuge 6 in sequence behind the cooling pool, and the centrifuge obtains a refined product, wherein the cooling crystallizer discharge port is connected to the first buffer tank 8 through the mother liquor collection pool 7, and the first buffer tank is sequentially installed with an ultrafiltration device 9 and a membrane concentration device 10, and the discharge port of the membrane concentration device is connected to the second buffer tank 11, and the second buffer tank is sequentially connected with a resin adsorption tower 12, a third buffer tank 13 and a second membrane separation device 14, and the water production end of the resin adsorption tower is respectively connected to the first membrane separation device and the initial paracetamol crude product end, and the concentrated water end of the second membrane separation device is connected to the first membrane separation device, and the concentrated liquid of the membrane concentration device is injected into the cooling crystallizer. Sodium pyrosulfite is added to the reaction pool. The water produced by the membrane concentration device is introduced into the initial crude product or the first membrane separation device. The bottom of the cooling crystallization tower is connected to the centrifuge, and the outlet of the cooling crystallization tower is connected to the crystallization mother liquor collection pool. The membrane concentration device is provided with a conductivity meter and a pH meter. The membrane concentration device is provided with a three-way water outlet. Example

[0016] Paracetamol wastewater refers to the wastewater obtained by washing crude paracetamol with water, including a cooling tank, a first membrane separation device, a reaction tank, a collection tank, a cooling crystallization tower, a crystallization mother liquor collection tank, a first buffer tank, an ultrafiltration device, a reverse osmosis device, a second buffer tank, a resin adsorption tower, a third buffer tank, a second membrane separation device, etc., which are connected in sequence by pipelines. The outlet of the cooling crystallization tower is connected to the crystallization mother liquor collection tank, and the bottom of the cooling crystallization tower is connected to a centrifuge to obtain a refined product after centrifugation.

[0017] The wastewater of the crude paracetamol after washing is input into the cooling pool through the pipeline, and after waiting for cooling and precipitation, it is input into the first membrane separation device through the pipeline, and the selective permeability of the membrane is used to separate ions, molecules or certain particles from the water, and then enters the reaction pool. Sodium pyrosulfite is added to the reaction pool, and then enters the cooling crystallization tower through the collection pool. The crystallization mother liquor obtained by the cooling crystallization tower enters the collection pool, and then enters the first buffer tank, and produces water in ultrafiltration and membrane concentration. The water obtained can be applied to the production line, and the concentrated solution of the membrane concentration enters the cooling crystallization tower. The effluent of the membrane concentration enters the second buffer tank, and the liquid of the second buffer tank enters the resin adsorption tower. The acetic acid eluate obtained by the resin adsorption tower enters the second membrane separation device for separation after passing through the third buffer tank. The concentrated water obtained by separation is input into the first membrane separation device again, and the water produced by the resin adsorption tower is respectively input into the first membrane separation device and used as water for washing the crude paracetamol.

[0018] The above are all preferred implementations of the present invention. For ordinary technicians in this technical field, without departing from the principle of the present invention, various equivalent modifications to the present invention belong to the protection scope of the claims attached to this application.

Claims

1. A paracetamol wastewater treatment system, characterized in that: The system comprises a cooling pool, and the rear of the cooling pool is connected in sequence to a first membrane separation device, a reaction pool, a collection pool, a cooling crystallizer and a centrifuge, wherein the centrifuge obtains a refined product, wherein a discharge port of the cooling crystallizer is connected to a first buffer tank through a mother liquor collection pool, an ultrafiltration device and a membrane concentration device are sequentially installed behind the first buffer tank, a discharge port of the membrane concentration device is connected to a second buffer tank, a resin adsorption tower, a third buffer tank and a second membrane separation device are sequentially connected behind the second buffer tank, a water production end of the resin adsorption tower is respectively connected to the first membrane separation device and an initial paracetamol crude product end, a concentrated water end of the second membrane separation device is connected to the first membrane separation device, and a concentrated liquid of the membrane concentration device is injected into the cooling crystallizer.

2. A paracetamol wastewater treatment system according to claim 1, characterized in that: Sodium metabisulfite was added into the reaction tank.

3. A paracetamol wastewater treatment system according to claim 1, characterized in that: The produced water from the membrane concentration unit is introduced into the initial crude product or the first membrane separation unit.

4. A paracetamol wastewater treatment system according to claim 1, characterized in that: The bottom of the cooling crystallizer is connected to a centrifuge, and the outlet of the cooling crystallization tower is connected to a crystallization mother liquor collection pool.

5. The paracetamol wastewater treatment system according to claim 1, characterized in that: The membrane concentration device is equipped with a conductivity meter and a pH meter.

6. A paracetamol wastewater treatment system according to claim 1, characterized in that: The membrane concentration device is provided with a three-way water outlet.

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