A device for treating methanol waste liquid in carotenoid

Abstract

This utility model relates to a treatment device for methanol waste liquid from benzalkonium chloride, belonging to the field of benzalkonium chloride technology. The treatment device includes: a tubular reactor; a discharge pipe at one end of the tubular reactor is connected to a rising film evaporator; a discharge pipe at the top of the rising film evaporator is connected to a gas-liquid separator; and a discharge pipe at the top of the gas-liquid separator is connected to a methanol distillation column. A recovery mechanism is provided on one side of the methanol distillation column. Through the tubular reactor, rising film evaporator, and methanol distillation column, the methanol waste liquid is reacted and distilled to obtain qualified methanol product, turning the methanol waste liquid into a by-product, saving treatment costs. During methanol treatment, sodium acetate impurities can be effectively separated and reused, allowing for the recycling of methanol waste liquid. The device can effectively separate and purify methanol waste liquid from benzalkonium chloride, improving the efficiency of the treatment.

Description

Technical Field

[0001] This utility model relates to the field of benzalkonium chloride technology, and in particular to a device for treating methanol waste liquid in benzalkonium chloride. Background Technology

[0002] Benzimidone is a triazine herbicide developed by Bayer AG in Germany in 1975. It is mainly used for field weed control of dryland crops such as sugar beets, cotton, and corn. It can control a variety of weeds such as lambsquarters, black nightshade, chickweed, wild sesame, and Kentucky bluegrass. It has high selectivity for sugar beets and forage beets.

[0003] Methanol wastewater is generated during the production of benzalkonium chloride, which contains various impurities from the production process, including methyl acetate, sodium acetate, and water. Existing treatments for methanol wastewater generally include: (1) biological treatment: using microorganisms to degrade and decompose methanol and organic matter in the wastewater and convert them into harmless substances; (2) incineration treatment: spraying the wastewater into a high-temperature furnace for combustion to completely burn the organic matter; and (3) oxidation treatment: using oxidants to oxidize the wastewater and oxidize the organic matter into harmless carbon dioxide and water. However, biological, oxidation, and incineration treatment methods greatly increase the production cost, and the filtration and separation effect of impurities in methanol wastewater is not ideal. They cannot effectively separate and purify methanol wastewater from benzalkonium chloride, and the treatment device has poor performance. Utility Model Content

[0004] Therefore, it is necessary to provide a treatment device for methanol waste liquid in benzalkonium chloride to address the problem of separation and purification of methanol waste liquid in benzalkonium chloride.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A device for treating methanol waste liquid from benzalkonium chloride includes a tubular reactor. One end of the tubular reactor has an outlet pipe connected to a rising film evaporator. The top outlet pipe of the rising film evaporator is connected to a gas-liquid separator. The top outlet pipe of the gas-liquid separator is connected to a methanol distillation column. A recovery mechanism is provided on one side of the methanol distillation column. The recovery mechanism includes a top condenser connected to the top outlet pipe of the methanol distillation column. One end of the top condenser has an outlet pipe connected to a methanol receiving tank. One side of the methanol receiving tank has an outlet pipe connected to a centrifuge body. The bottom outlet pipe of the methanol receiving tank delivers methanol via a methanol transfer pump.

[0006] In one embodiment, the recovery mechanism further includes a centrifuge body disposed on one side of the methanol receiving tank, a centrifuge mother liquor tank disposed on one side of the centrifuge body, a rinsing liquid tank disposed on one side of the centrifuge body, the rinsing liquid tank being disposed at one end of the centrifuge mother liquor tank, and a rinsing liquid transfer pump being connected to the bottom end of the rinsing liquid tank.

[0007] In one embodiment, a cryogenic crystallizer is connected to the other side of the centrifuge body, and a rising film receiving tank is connected to one side of the cryogenic crystallizer. The discharge pipe at the bottom of the rising film receiving tank is connected to a rising film receiving tank transfer pump. The rising film receiving tank is connected to the cryogenic crystallizer and the rising film evaporator respectively through the rising film receiving tank transfer pump.

[0008] In one embodiment, a methanol flow meter is connected to the bottom of one side of the tubular reactor, a liquid alkali flow meter is connected to the top of one side of the tubular reactor, a methanol feed pump is connected to the bottom of one end of the methanol flow meter, and a liquid alkali feed pump is connected to the top of one end of the liquid alkali flow meter.

[0009] In one embodiment, a centrifuge transfer pump is connected to the discharge pipe on one side of the centrifuge body, and the centrifuge body is connected to the centrifuge mother liquor tank and the rinsing liquid tank through the centrifuge transfer pump. The discharge pipe at the bottom of the centrifuge mother liquor tank is connected to the centrifuge mother liquor transfer pump.

[0010] In one embodiment, the inner wall of the rising film evaporator is provided with an inner liner, a heating plate is fixedly connected to the bottom end of the inner liner, a connecting ring is fixedly connected to the outer wall of the inner liner, and several evenly arranged heating rods are fixedly connected between the connecting ring and the heating plate.

[0011] In one embodiment, a heating ring is installed on the outer wall of the inner liner, and the heating rod is fixedly connected to the heating ring.

[0012] In one embodiment, the inner wall of the inner liner is equipped with several evenly arranged steam pipes, both ends of which are connected to conveying pipes. One side of one of the conveying pipes passes through the inner liner and the rising film evaporator in sequence, while the other side of the other conveying pipe passes through to the outside of the inner liner.

[0013] Beneficial effects 1. The above-mentioned methanol waste liquid treatment device for benzalkonium chloride uses a tubular reactor, a rising film evaporator, and a methanol distillation column to perform reactive distillation separation of methanol waste liquid to obtain qualified methanol products. It turns methanol waste liquid in production into a by-product, saving the cost of treatment methods such as biological, oxidation, and incineration of methanol waste liquid. At the same time, methanol is sold as a product, generating new economic benefits. When treating methanol, the impurity sodium acetate can be effectively separated and reused, and methanol waste liquid can be recycled. In the process of treating methanol, wastewater and waste liquid are recycled, which greatly reduces the generation of "three wastes". It can effectively separate and purify methanol waste liquid in benzalkonium chloride and improve the use effect of the treatment device. 2. When the methanol waste liquid passes through the rising film evaporator, steam enters the cavity between the rising film evaporator and the inner tank through another delivery pipe. This steam heats the heating plate, heating ring, heating rod, and connecting ring of the cavity. The heating plate is spirally arranged at the bottom of the inner tank to heat the methanol waste liquid. The heating ring and multiple heating rods work together to quickly and evenly heat the outer wall of the inner tank, improving the evaporation efficiency of the rising film evaporator for methanol waste liquid. The connecting ring can connect multiple heating rods and accelerate heat transfer. One delivery pipe can deliver steam to multiple steam pipes to heat the methanol waste liquid, while another delivery pipe can deliver steam into the cavity and then discharge it through a pipe on one side of the rising film evaporator. This allows for rapid and even heating of the methanol waste liquid, improving the evaporation and separation effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the recycling mechanism of this utility model; Figure 2 This is a partial structural diagram of the recycling mechanism of this utility model; Figure 3 This is a schematic diagram of the structure of the detachable component of this utility model; Figure 4 This is a partial structural diagram of the separation component of this utility model; Figure 5 This is a schematic diagram of the half-section structure of the separation component of this utility model.

[0016] Figure label: 100. Tubular reactor; 200. Rising film evaporator; 210. Inner liner; 220. Heating plate; 230. Heating ring; 240. Heating rod; 250. Connecting ring; 260. Steam pipe; 270. Delivery pipe; 300. Gas-liquid separator; 400. Rising film receiving tank; 500. Methanol distillation column; 600. Recovery mechanism; 610. Top condenser; 620. Methanol receiving tank; 621. Methanol delivery pump; 630. Freezing crystallizer; 640. Centrifuge body; 650. Centrifuge mother liquor tank; 660. Eluent tank; 661. Eluent transfer pump; 670. Centrifuge transfer pump; 680. Centrifuge mother liquor transfer pump; 700. Rising film receiving tank transfer pump; 710. Methanol flow meter; 720. Liquid alkali flow meter; 800. Methanol feed pump; 810. Liquid alkali feed pump. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The following is combined Figure 1 - Figure 5 This invention describes a device for treating methanol waste liquid from benzalkonium chloride.

[0019] In one embodiment, a device for treating methanol waste liquid from benzalkonium chloride includes a tubular reactor 100. One end of the tubular reactor 100 has an outlet pipe connected to a rising film evaporator 200. The top outlet pipe of the rising film evaporator 200 is connected to a gas-liquid separator 300. The top outlet pipe of the gas-liquid separator 300 is connected to a methanol distillation column 500. A recovery mechanism 600 is provided on one side of the methanol distillation column 500. The recovery mechanism 600 includes a top condenser 610 connected to the top outlet pipe of the methanol distillation column 500. One end of the top condenser 610 has an outlet pipe connected to a methanol receiving tank 620. One side of the methanol receiving tank 620 has an outlet pipe connected to a centrifuge body 640. The bottom outlet pipe of the methanol receiving tank 620 delivers methanol via a methanol transfer pump 621.

[0020] like Figure 1As shown, the recovery mechanism 600 also includes a centrifuge body 640 disposed on one side of the methanol receiving tank 620. A centrifugal mother liquor tank 650 is disposed on one side of the centrifuge body 640, and a rinsing liquid tank 660 is disposed on one side of the centrifuge body 640. The rinsing liquid tank 660 is located at one end of the centrifugal mother liquor tank 650, and a rinsing liquid transfer pump 661 is connected to the bottom end of the rinsing liquid tank 660. A cryogenic crystallizer 630 is connected to the other side of the centrifuge body 640, and a rising film receiving tank 400 is connected to one side of the cryogenic crystallizer 630. The discharge pipe at the bottom end of the rising film receiving tank 400 is connected to a rising film receiving tank transfer pump 700, and the rising film receiving tank 400 transfers materials through the rising film receiving tank. Pump 700 is connected to the cryogenic crystallizer 630 and the rising film evaporator 200 respectively. A methanol flow meter 710 is connected to the bottom of one side of the tubular reactor 100. A liquid alkali feed pump 810 is connected to the top of one end of the tubular reactor 100. A methanol feed pump 800 is connected to the bottom of one end of the methanol flow meter 710. A liquid alkali feed pump 810 is connected to the top of one end of the liquid alkali flow meter 720. A centrifuge transfer pump 670 is connected to the discharge pipe on one side of the centrifuge body 640. The centrifuge body 640 is connected to the centrifuge mother liquor tank 650 and the washing liquid tank 660 through the centrifuge transfer pump 670. A centrifuge mother liquor transfer pump 680 is connected to the discharge pipe at the bottom of the centrifuge mother liquor tank 650.

[0021] In this embodiment, methanol waste liquid and liquid alkali are fed into tubular reactor 100 via methanol feed pump 800 and liquid alkali feed pump 810, respectively, for saponification reaction. The methanol waste liquid then enters rising film evaporator 200 through tubular reactor 100. The methanol waste liquid is heated and evaporated, and then heated and separated. The vapor-liquid mixture after evaporation is sent to gas-liquid separator 300 for secondary separation, thus separating the vapor-liquid mixture. The gas-liquid separator 300 sends the secondary steam to methanol distillation tower 500 for distillation. The methanol distillation tower 500 condenses and recovers the distilled methanol through tower top condenser 610 and methanol receiving tank 620, and then sends it to methanol product area through methanol transfer pump 621. The concentrate is sent to rising film receiving tank 400, where sodium acetate in the waste liquid is recovered and reused through cryogenic crystallization kettle 630 and centrifuge body 640. This allows for effective recovery and reuse of methanol, improving the treatment effect of the device on methanol waste liquid.

[0022] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the inner wall of the rising film evaporator 200 is provided with an inner liner 210. A heating plate 220 is fixedly connected to the bottom end of the inner liner 210. A connecting ring 250 is fixedly connected to the outer wall of the inner liner 210. Several evenly arranged heating rods 240 are fixedly connected between the connecting ring 250 and the heating plate 220. A heating ring 230 is installed on the outer wall of the inner liner 210. The heating rods 240 are fixedly connected to the heating ring 230. Several evenly arranged steam pipes 260 are installed on the inner wall of the inner liner 210. Both ends of the steam pipes 260 are connected to a conveying pipe 270. One side of one conveying pipe 270 passes through the inner liner 210 and the rising film evaporator 200 in sequence, and the other side of the other conveying pipe 270 passes through to the outside of the inner liner 210.

[0023] In this embodiment, steam enters multiple steam pipes 260 through one of the delivery pipes 270 to heat the methanol waste liquid inside the inner tank 210. Steam is also delivered through another delivery pipe 270 to the cavity between the inner tank 210 and the rising film evaporator 200, where it can heat the heating plate 220, heating ring 230, heating rod 240, and connecting ring 250. The heating plate 220 can heat the bottom of the inner tank 210, and the heating ring 230 and multiple heating rods 240 can uniformly heat the surface of the inner tank 210, which can accelerate the evaporation efficiency of the methanol waste liquid. The methanol waste liquid in the cavity is discharged to the steam through a pipe on one side of the rising film evaporator 200, which can quickly heat and evaporate the methanol waste liquid and improve the separation and recovery effect of the methanol waste liquid.

[0024] Working principle: Methanol waste liquid and liquid alkali are respectively fed into the tubular reactor 100 via methanol feed pump 800 and liquid alkali feed pump 810, and then into the tubular reactor 100 via methanol flow meter 710 and liquid alkali flow meter 720 for saponification reaction. The tubular reactor 100 then feeds the methanol waste liquid to the rising film evaporator 200 via the discharge pipe for heating and evaporation. The vapor-liquid mixture after evaporation is fed into the gas-liquid separator 300 for secondary separation. The gas-liquid separator 300 feeds the secondary steam to the methanol distillation column 500. The methanol distillation column 500 distills the secondary steam and feeds it to the top condenser 610. The top condenser 610 feeds the distilled methanol to the methanol receiving tank 620. The methanol receiving tank 620 then feeds the methanol to the methanol product area via methanol transfer pump 621. The gas-liquid separator 300 delivers the concentrated liquid to the rising film receiving tank 400. The rising film receiving tank 400, via the rising film receiving tank transfer pump 700, transfers the liquid to the cryo-crystallization kettle 630. Through cryo-crystallization technology, the temperature is controlled to cause sodium acetate to crystallize. The cryo-crystallization kettle 630 then delivers the sodium acetate mixture to the centrifuge body 640 for recycling. The centrifuge body 640, via the centrifuge transfer pump 670, delivers the centrifugal mother liquor and washing methanol to the centrifugal mother liquor... In tank 650 and rinsing liquid tank 660, centrifugal mother liquor tank 650 is connected to the liquid alkali feed pipe before liquid alkali feed pump 810 via centrifugal mother liquor transfer pump 680, and rinsing liquid tank 660 is connected to the methanol feed pipe before methanol feed pump 800 via rinsing liquid transfer pump 661. If there are too many light components in rising film receiving tank 400, rising film receiving tank 400 is transferred to rising film evaporator 200 via rising film receiving tank transfer pump 700 for rising film treatment again. When the methanol waste liquid passes through the rising film evaporator 200, steam enters multiple steam pipes 260 through one of the delivery pipes 270 to heat the methanol waste liquid. The steam then enters the space between the inner tank 210 and the rising film evaporator 200 through another delivery pipe 270 to heat the heating plate 220, heating ring 230, heating rod 240, and connecting ring 250, which can rapidly heat and evaporate the methanol waste liquid in the inner tank 210.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for treating methanol waste liquid from benzalkonium chloride, characterized in that, include: A tubular reactor (100) has a discharge pipe at one end connected to a rising film evaporator (200), a discharge pipe at the top of the rising film evaporator (200) connected to a gas-liquid separator (300), a discharge pipe at the top of the gas-liquid separator (300) connected to a methanol distillation column (500), and a recovery mechanism (600) is provided on one side of the methanol distillation column (500). The recovery mechanism (600) includes a top condenser (610) connected to the top discharge pipe of the methanol distillation column (500). The discharge pipe at one end of the top condenser (610) is connected to a methanol receiving tank (620). The discharge pipe on one side of the methanol receiving tank (620) is connected to a centrifuge body (640). The discharge pipe at the bottom of the methanol receiving tank (620) is used to transport methanol through a methanol transfer pump (621).

2. The apparatus for treating methanol waste liquid from benzalkonium chloride according to claim 1, characterized in that, The recovery mechanism (600) also includes a centrifuge body (640) disposed on one side of the methanol receiving tank (620). A centrifuge mother liquor tank (650) is disposed on one side of the centrifuge body (640), and a rinsing liquid tank (660) is disposed on one side of the centrifuge body (640). The rinsing liquid tank (660) is disposed at one end of the centrifuge mother liquor tank (650), and the bottom end of the rinsing liquid tank (660) is connected to a rinsing liquid transfer pump (661).

3. The apparatus for treating methanol waste liquid from benzalkonium chloride according to claim 2, characterized in that, The centrifuge body (640) is connected to a cryogenic crystallizer (630) on the other side. A rising film receiving tank (400) is connected to one side of the cryogenic crystallizer (630). The discharge pipe at the bottom of the rising film receiving tank (400) is connected to a rising film receiving tank transfer pump (700). The rising film receiving tank (400) is connected to the cryogenic crystallizer (630) and the rising film evaporator (200) respectively through the rising film receiving tank transfer pump (700).

4. The apparatus for treating methanol waste liquid from benzalkonium chloride according to claim 1, characterized in that, A methanol flow meter (710) is connected to the bottom of one side of the tubular reactor (100), a liquid alkali flow meter (720) is connected to the top of one side of the tubular reactor (100), a methanol feed pump (800) is connected to the bottom of one end of the methanol flow meter (710), and a liquid alkali feed pump (810) is connected to the top of one end of the liquid alkali flow meter (720).

5. The apparatus for treating methanol waste liquid from benzalkonium chloride according to claim 2, characterized in that, The centrifuge body (640) has a discharge pipe on one side connected to a centrifuge transfer pump (670). The centrifuge body (640) is connected to the centrifuge mother liquor tank (650) and the rinsing liquid tank (660) through the centrifuge transfer pump (670). The discharge pipe at the bottom of the centrifuge mother liquor tank (650) is connected to a centrifuge mother liquor transfer pump (680).

6. The apparatus for treating methanol waste liquid from benzalkonium chloride according to claim 1, characterized in that, The inner wall of the rising film evaporator (200) is provided with an inner liner (210), and a heating plate (220) is fixedly connected to the bottom end of the inner liner (210). A connecting ring (250) is fixedly connected to the outer wall of the inner liner (210), and several evenly arranged heating rods (240) are fixedly connected between the connecting ring (250) and the heating plate (220).

7. The apparatus for treating methanol waste liquid from benzoxazine according to claim 6, characterized in that, A heating ring (230) is installed on the outer wall of the inner liner (210), and the heating rod (240) is fixedly connected to the heating ring (230).

8. The apparatus for treating methanol waste liquid from benzalkonium chloride according to claim 6, characterized in that, The inner wall of the inner liner (210) is equipped with several evenly arranged steam pipes (260), and both ends of the steam pipes (260) are connected to conveying pipes (270). One side of one of the conveying pipes (270) passes through the inner liner (210) and the rising film evaporator (200) in sequence, and the other side of the other conveying pipe (270) passes through to the outside of the inner liner (210).

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