CN215440042U

CN215440042U - TGIC washing waste water cyclic utilization system

Info

Publication number: CN215440042U
Application number: CN202121140834.4U
Authority: CN
Inventors: 吴永一; 李大伟
Original assignee: Huangshan Friendship Nanhai New Material Co ltd
Current assignee: Huangshan Friendship Nanhai New Material Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-01-07
Anticipated expiration: 2031-05-25

Abstract

The utility model discloses a TGIC washing wastewater recycling system, which comprises a washing tank, a water inlet and a water outlet, wherein the water inlet and the water outlet are arranged on the washing tank; the water outlet connection is provided with a distillation still, the air outlet end connection of the distillation still is provided with a condenser, the outlet connection of the condenser is provided with a receiving tank, and the receiving tank is connected with the water inlet of the water washing tank. The method can reduce the consumption of washing water and the treatment capacity of washing wastewater, thereby greatly saving the environmental protection treatment cost and being widely applied to the field of TGIC production and processing.

Description

TGIC washing waste water cyclic utilization system

Technical Field

The utility model relates to the field of TGIC production and processing, in particular to a TGIC washing wastewater recycling system.

Background

In the production and processing of TGIC, raw materials are subjected to cyclization reaction to obtain a TGIC crude product, and epichlorohydrin, sodium chloride, sodium hydroxide, water, a catalyst and byproducts are mixed in the TGIC crude product. Most of sodium chloride, a small amount of water and the catalyst are removed by one-time filtration. Then adding a proper amount of deionized water to wash the materials, standing for layering, and removing residual sodium chloride, a small amount of byproducts and the like. Therefore, the need for water washing and standing after the cyclization reaction is critical for removing the impurity components in the TGIC crude product. Wherein the washing step can remove sodium chloride, catalyst and by-products dissolved in water. Part of epichlorohydrin is also dissolved in the waste water of washing to form epoxy chloropropane saturated aqueous solution. And the concentration of TOC and COD of the waste water after washing is high, and the existing process has the following treatment mode for the waste water after washing: adding a certain amount of diluent into the waste water which is washed out, so that the TOC and the COD in the waste water reach proper concentration, and directly conveying the waste water into a sewage treatment station for sewage treatment. The method undoubtedly increases the treatment difficulty of the washing wastewater and the treatment cost, and simultaneously, the dilution causes huge water consumption for washing in the TGIC production process, thereby increasing the production cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a TGIC (triglycidyl isocyanurate) washing wastewater recycling system, which solves the problems that the existing washing wastewater is directly sent to a sewage treatment station for treatment, the treatment difficulty is high, and the water consumption for washing is large.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a TGIC water washing wastewater recycling system comprises a water washing tank, a water inlet and a water outlet which are arranged on the water washing tank; the water outlet connection is provided with a distillation still, the air outlet end connection of the distillation still is provided with a condenser, the outlet connection of the condenser is provided with a receiving tank, and the receiving tank is connected with the water inlet of the water washing tank.

Preferably, the distillation kettle is a negative pressure vacuum kettle, and the pressure in the kettle is-0.098 MPa.

Preferably, the number of the condensers is 2 in series.

In order to further treat the slurry waste left after distillation, a bottom discharge hole of the distillation kettle is connected with a closed plate-and-frame filter press in a blind flow mode.

The utility model has the beneficial effects that: the method comprises the steps of introducing the washed wastewater into a distillation still for distillation, evaporating water and epoxy chloropropane in the wastewater in a distillation mode, condensing by a condenser to obtain distilled water containing epoxy chloropropane, and sending the distilled water into a washing tank for reuse. The system can remove impurities such as sodium chloride, sodium hydroxide, byproducts, catalysts and the like in the water washing wastewater, so that the water washing wastewater can return to the water washing tank for continuous use, thereby reducing the discharge amount of the wastewater, saving the production water consumption and simultaneously reducing the treatment amount of sewage. Meanwhile, as the water refluxed into the water washing tank contains the epoxy chloropropane, the epoxy chloropropane in the slurry entering the water washing tank is reduced to be continuously dissolved in the water, namely the epoxy chloropropane and the TGIC crude product enter the next procedure in a precipitation mode, and the epoxy chloropropane and the TGIC are separated in the next procedure, so that the recycling of the epoxy chloropropane is facilitated, and the material loss of the epoxy chloropropane is reduced. Meanwhile, the negative pressure distillation is adopted to avoid other impurities from being evaporated back to the receiving tank together. Impurities except the epichlorohydrin and water after distillation enter a blind-flow type totally-closed plate-and-frame filter press through a discharge hole at the bottom for filter pressing, so that the recovery treatment is convenient.

The utility model will be explained in more detail below with reference to the drawings and examples.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

In the embodiment, as shown in fig. 1, a TGIC water washing wastewater recycling system comprises a water washing tank 1, a water inlet 2 and a water outlet 3 arranged on the water washing tank 1; the water outlet 3 is connected with a distillation kettle 4, the distillation kettle 4 is a negative pressure vacuum kettle, the pressure in the kettle is-0.098 MPa, and water and epoxy chloropropane can be evaporated at low temperature through the distillation kettle without causing other impurities to evaporate. Stills 4's the end connection of giving vent to anger is provided with condenser 5, and the exit linkage of condenser 5 is provided with and receives jar 6, and vapor and epichlorohydrin vapor after stills 4 distillation are liquefied and flow in under condenser 5's effect and receive jar 6, receive jar 6 and be connected with water inlet 2 of washing jar 1 for waste water after getting rid of impurity can recycle, and can not influence the effect of washing. Meanwhile, the dissolving amount of epoxy chloropropane in the raw material can be reduced, and the recovery of epoxy chloropropane is facilitated.

In order to improve the condensation efficiency, the condensers 5 are connected in series and are provided with 2 condensers.

The bottom discharge hole of the distillation kettle 4 is connected with a closed plate-and-frame filter press 7, and the precipitated impurities are subjected to filter pressing through the closed plate-and-frame filter press 7, so that the recovery and utilization are convenient.

The utility model is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the utility model are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the utility model; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims

1. A TGIC washing wastewater recycling system comprises a washing tank (1), a water inlet (2) and a water outlet (3) which are arranged on the washing tank (1); the method is characterized in that: delivery port (3) are connected and are provided with stills (4), the end connection of giving vent to anger of stills (4) is provided with condenser (5), and the exit linkage of condenser (5) is provided with and receives jar (6), it is connected with water inlet (2) of washing jar (1) to receive jar (6).

2. The TGIC water washing wastewater recycling system of claim 1, wherein: the distillation kettle (4) is a negative pressure vacuum kettle, and the pressure in the kettle is-0.098 MPa.

3. The TGIC water washing wastewater recycling system of claim 1, wherein: the number of the condensers (5) is 2.

4. The TGIC water washing wastewater recycling system of claim 1, wherein: and a bottom discharge hole of the distillation kettle (4) is connected with a closed plate-and-frame filter press (7).