Wastewater treatment optimizing device for epichlorohydrin production
By designing optimized devices for wastewater buffer tanks and storage tanks, and extending the reaction time, the problem of incomplete wastewater treatment in epichlorohydrin production was solved, costs and foam generation were reduced, and stable production was achieved.
Patent Information
- Application Number
- CN202423134291.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-19
AI Technical Summary
In the existing epichlorohydrin production process, the organic matter does not react completely during wastewater treatment, resulting in water vapor pollution during evaporation. Furthermore, the alkaline wastewater generates a large amount of foam, affecting production stability and increasing costs.
An optimized device including a wastewater buffer tank and a storage tank was designed. It adopts a water ring vacuum pump and an alkali replenishment pipeline, combined with a vertical baffle and a stirring mechanism to extend the reaction time. The wastewater treatment is optimized through the structure of the mixing chamber and the slow flow chamber, reducing the use of alkali and acid.
It prolongs the reaction time between wastewater and alkaline solution, reduces the consumption of liquid alkali and hydrochloric acid, reduces saline wastewater, optimizes wastewater treatment effect, and lowers production costs.
Smart Images
Figure CN223705336U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to epoxy chloropropane production technical field, especially relates to a wastewater treatment optimization device for epoxy chloropropane production. BACKGROUND
[0002] At present, there are three kinds of common epoxy chloropropane manufacturing processes in the market: propylene chlorination method, acetic acid propylene ester method and glycerol method. Among them, in the process of preparing epoxy chloropropane by glycerol method, the intermediate product dichloropropanol will react with liquid alkali in the cyclization tower to generate ECH, and this process will produce salt-containing wastewater, which contains a part of ECH and a small amount of organic by-products. The existence of this part of organic matter will be taken out with steam in the subsequent three-effect evaporation treatment, resulting in the pollution of evaporated water.
[0003] Because the cyclization tower reaction needs to maintain an alkaline environment, the wastewater itself contains a certain alkalinity, but the reaction of organic matter in the alkaline environment is slow, therefore the original process adopts the method of intermediate alkali supplement to increase the alkali concentration. According to the organic matter content of the wastewater sampling and inspection at the bottom of the tower, a certain amount of liquid alkali is additionally added in the wastewater conveying process to ensure the complete reaction of the organic matter and convert it into a component that is not easy to be taken out with water evaporation. However, the wastewater containing excessive alkali is alkaline, which will cause a large amount of foam in the reaction kettle during the three-effect treatment process, which is not conducive to stable production. Therefore, after adding alkali, the organic matter composition is confirmed by sampling, and then acid is added to adjust the pH, so that the solution finally becomes neutral or weakly alkaline. SUMMARY
[0004] The technical problem to be solved by the utility model is to provide a wastewater treatment optimization device for epoxy chloropropane production, which is reasonable in design, prolongs the reaction time and reduces the cost.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A wastewater treatment optimization device for epoxy chloropropane production, characterized in that the device comprises a wastewater buffer tank and a wastewater storage tank, a water inlet pipeline for receiving salt-containing wastewater and a water outlet pipeline connected with the wastewater storage tank are arranged at the lower part of the wastewater buffer tank, a water inlet is arranged at the lower part of the wastewater storage tank and connected with the water outlet pipeline, a water outlet is arranged at the upper part of the wastewater storage tank, a water ring type vacuum pump is installed on the water outlet pipeline, a supplementary alkali pipeline is connected with the water outlet pipeline on the water outlet side of the water ring type vacuum pump through a three-way pipe, and a flow valve is installed on the supplementary alkali pipeline.
[0007] The technical problems to be solved by the utility model also can be realized through following technical schemes, install vertical baffle in the wastewater storage tank, the wastewater storage tank inner chamber is divided into mixing cavity and slow flow cavity through vertical baffle, the water inlet is established in the mixing cavity, the water outlet is established in the slow flow cavity, the upper portion of vertical baffle is equipped with the communication hole of the communication of mixing cavity and slow flow cavity, install the stirring mechanism of mixing in the mixing cavity, fix a plurality of vertical slow flow plates in the slow flow cavity, and be equipped with the liquid passage of passing between adjacent slow flow plates.
[0008] The technical problems to be solved by the utility model also can be realized through following technical schemes, the slow flow plate is the vertical setting strip-shaped sheet material, and the slow flow plate is arrayed, prolongs the reaction time.
[0009] The technical problems to be solved by the utility model also can be realized through following technical schemes, the stirring mechanism includes the vertical setting stirring shaft and the stirring blade of installing on stirring shaft, and the top of stirring shaft is installed in the top of wastewater storage tank through bearing, and the top of wastewater storage tank is equipped with the stirring motor for driving stirring blade, accelerates the mixing of wastewater and lye.
[0010] The technical problems to be solved by the utility model also can be realized through following technical schemes, the communication hole is the horizontal setting strip-shaped hole, and the strip-shaped hole is equipped with the shunt tooth of side by side arrangement, to block impurities and foam, improve the mixing efficiency of wastewater and lye.
[0011] Compared with prior art, the utility model discloses through the wastewater storage tank for prolonging reaction time, and cancelling the alkali supplement pipeline before the original buffer tank, reduces the consumption of liquid alkali and hydrochloric acid, saves raw material cost, also reduces the salt-containing wastewater generated because of acid-base neutralization, controls the salt water unit consumption generated in the preparation of epoxy chloropropane of glycerol method, and the wastewater treatment effect is optimized, through the water ring type vacuum pump and the alkali supplement pipeline with flow valve, further reduce the use of liquid alkali and hydrochloric acid, and then optimize the wastewater treatment effect, through the mixing cavity and slow flow cavity, prolong the reaction time, make wastewater organic matter and alkali reaction, thereby reduce cost. ACCURACY
[0012] Figure 1 It is the structural drawing of the wastewater treatment optimization device for the epoxy chloropropane production of the utility model;
[0013] Figure 2 It is the distribution diagram of slow flow plate in wastewater storage tank.
[0014] In the drawing: 1-wastewater buffer tank, 2-water ring type vacuum pump, 3-alkali supplement pipeline, 4-wastewater storage tank, 5-vertical baffle, 6-slow flow plate, 7-communication hole, 8-mixing cavity, 9-slow flow cavity. SPECIFIC IMPLEMENTATION
[0015] Clearly, the described embodiments are merely part of the embodiments of the present application, rather than all the embodiments.
[0016] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0017] Referring to Figure 1 and Figure 2 A kind of wastewater treatment optimization device for epichlorohydrin production, the device includes wastewater buffer tank 1 and wastewater storage tank 4, wastewater buffer tank 1 lower part is equipped with the water inlet pipeline for receiving salt-containing wastewater and the water outlet pipeline connected with wastewater storage tank, wastewater storage tank 4 lower part is equipped with the water inlet connected with water outlet pipeline, wastewater storage tank 4 upper part is equipped with water outlet, water ring vacuum pump 2 is installed on the water outlet pipeline, water ring vacuum pump 2 water outlet side water outlet pipeline is connected with alkali supplement pipeline 3 by three-way, flow valve is installed on alkali supplement pipeline 3, not drawn in the figure.
[0018] Vertical partition 5 is installed in the wastewater storage tank 4, the inner cavity of wastewater storage tank 4 is divided into mixing cavity 8 and slow flow cavity 9 by vertical partition 5, the water inlet is arranged in mixing cavity 8, and the water outlet is arranged in slow flow cavity 9, the upper part of vertical partition 5 is provided with communication hole 7 for communicating mixing cavity 8 and slow flow cavity 9, stirring mechanism for mixing is installed in the mixing cavity 8, and the stirring mechanism is not drawn, a plurality of vertical slow flow plates 6 are fixed in the slow flow cavity 9, and liquid passage is arranged between adjacent slow flow plates 6.
[0019] The slow flow plate 6 is a vertically arranged long strip-shaped plate, and the slow flow plate 6 is arranged in an array.
[0020] The stirring mechanism includes a vertically arranged stirring shaft and stirring blades mounted on the stirring shaft, the top end of the stirring shaft is mounted on the top of the wastewater storage tank through a bearing, and a stirring motor for driving the stirring blades is mounted on the top of the wastewater storage tank.
[0021] The communication hole 7 is a horizontally arranged long strip-shaped hole, and the long strip-shaped hole is provided with shunt teeth arranged side by side.
[0022] The utility model discloses a cancel the original supplement alkali pipeline, change for the tower bottom waste water is stored temporarily after the buffer tank, and is transported to the 5000m waste water storage tank, and the storage tank is equipped with multilayer baffle, is used for prolonging the reaction time. In addition, the storage tank involves adopting the lower inlet upper outlet, guarantees the full performance of reaction. In order to prevent the insufficient initial alkali concentration of waste water into 5000m, leads to the situation of organic matter residue, according to the sampling data of buffer tank, a small amount of alkali is supplemented before being transported to the storage tank, guarantees the continuity of production. The utility model reduces the material input brought by the additional alkali, acid of this process and the problem of salt water unit consumption increase, optimizes the original process, makes waste water organic matter and alkali reaction through the method of prolonging reaction time, to reduce the cost.
[0023] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme of the utility model and the utility model concept, equivalent replacement or change, should be covered in the protection scope of the utility model.
Claims
1. A wastewater treatment and optimization device for epichlorohydrin production, characterized in that, The device includes a wastewater buffer tank and a wastewater storage tank. The wastewater buffer tank has an inlet pipe for receiving saline wastewater at the bottom and an outlet pipe connected to the wastewater storage tank at the bottom. The wastewater storage tank has an inlet at the bottom connected to the outlet pipe and an outlet at the top. A water ring vacuum pump is installed on the outlet pipe. An alkali replenishment pipe is connected to the outlet pipe on the outlet side of the water ring vacuum pump through a tee. A flow valve is installed on the alkali replenishment pipe.
2. The wastewater treatment optimization device for epichlorohydrin production according to claim 1, characterized in that, A vertical baffle is installed inside the wastewater storage tank, dividing the inner cavity of the wastewater storage tank into a mixing chamber and a slow-flow chamber. The inlet is located in the mixing chamber, and the outlet is located in the slow-flow chamber. A connecting hole is provided at the upper part of the vertical baffle to connect the mixing chamber and the slow-flow chamber. A mixing stirring mechanism is installed in the mixing chamber, and several vertically arranged slow-flow plates are fixed in the slow-flow chamber. Liquid passages are provided between adjacent slow-flow plates.
3. The wastewater treatment optimization device for epichlorohydrin production according to claim 2, characterized in that, The flow-retardant plate is a vertically arranged long strip of plate, and the flow-retardant plates are arranged in an array.
4. The wastewater treatment optimization device for epichlorohydrin production according to claim 2, characterized in that, The stirring mechanism includes a vertically arranged stirring shaft and stirring blades mounted on the stirring shaft. The top of the stirring shaft is mounted on the top of the wastewater storage tank via a bearing. A stirring motor for driving the stirring blades is installed on the top of the wastewater storage tank.
5. The wastewater treatment optimization device for epichlorohydrin production according to claim 2, characterized in that, The connecting hole is a horizontally arranged elongated hole, and the elongated hole is provided with parallel diverting teeth.