Explosion-proof alkylation ionic liquid waste liquid treatment system

Abstract

The utility model discloses an explosion-proof alkylated ionic liquid waste liquid treatment system which comprises a storage tank, a reaction kettle is connected to the front side of the storage tank, a storage reaction tank is connected to the rear side of the storage tank, a filter press is connected to the rear side of the storage reaction tank, waste water generated by the filter press is connected to a waste water tank, the waste water tank is connected to the storage tank, and the storage tank is connected to the storage tank. And a closed loop is formed. The device disclosed by the utility model has the characteristics that no wastewater is discharged, the device is more environment-friendly, materials are thoroughly reacted, and the stability of the dried sludge is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of alkylation petroleum processing, in particular to an explosion-proof alkylation ion liquid waste liquid treatment system. Background Art

[0002] In the application of oil refining, compared with conventional chloroaluminate ionic liquids, ionic liquids with two or more metal coordinated central anions not only ensure high activity, but also increase the carbon eight selectivity from 46.5% to 95.8%. Later, industrial applications proved that compared with concentrated sulfuric acid method and hydrofluoric acid method, the composite ionic liquid method has a high octane number, mild reaction conditions, and significantly shortened reaction time. At the same time, the process equipment investment is low, and the safety and environmental protection performance are good. It is also suitable for processing isobutylene feed.

[0003] However, after the ionic liquid is used as a catalyst for oil refining, the ionic liquid becomes saturated and ineffective over time, and a batch of ionic liquids needs to be replaced in the alkylation unit. The replaced alkylation ionic liquid waste is generally stored in a sealed manner. It mainly contains anhydrous aluminum chloride, cupric chloride, triethylamine hydrochloride, etc., so it cannot come into contact with air, water and alkali solution. There is no better treatment method in the existing technology.

[0004] The applicant's application for a Chinese patent with publication number CN116119870A and patent name "A pretreatment process and device for alkylation ionic liquid wastewater" discloses a pretreatment process, but wastewater will be discharged after treatment. During the reaction, there is no observation window in the neutralization reactor, and the state is not visible. The next process is often carried out before the reaction is complete, and the temperature is difficult to control. The reaction is often incomplete during the treatment process, and the resulting dryable sludge is not stable enough, being too wet and too thin, with a lot of acid oil attached to the surface, and the subsequent treatment cost is very high. Utility Model Content

[0005] The purpose of the utility model is to provide an explosion-proof alkylation ion liquid waste treatment system. The utility model has the characteristics of no wastewater discharge, more environmentally friendly, and at the same time, the material reacts thoroughly, and the dryable sludge produced has higher stability.

[0006] The technical solution of the utility model is: an explosion-proof alkylation ion liquid waste treatment system, comprising a storage tank, a reactor connected to the front side of the storage tank, a storage reaction pool connected to the rear side of the storage tank, a filter press connected to the rear side of the storage reaction pool, wastewater generated by the filter press connected to a wastewater pool, and the wastewater pool connected to the storage tank to form a closed loop.

[0007] In the aforementioned explosion-proof alkylation ion liquid waste treatment system, in order to further cool the material after the first reaction, a cooling system and a temperature sensor are provided in the storage tank.

[0008] In the aforementioned explosion-proof alkylation ionic liquid waste treatment system, preferably, the storage tank is provided in plurality according to the amount of the material.

[0009] The aforementioned explosion-proof alkylation ionic liquid waste treatment system also includes a cold water pool, which is connected to the storage tank and the reactor. The cold water in the cold water pool is continuously introduced into the storage tank and the reactor. The cold water serves as a reactant in the reactor and as a medium for the cooling system in the storage tank.

[0010] In the aforementioned explosion-proof alkylation ionic liquid waste treatment system, one side of the reactor is connected to a tail gas tank, and the tail gas tank includes a water tower, which is connected to a tail gas absorption tower to absorb the tail gas discharged from the reactor.

[0011] In the aforementioned explosion-proof alkylation ion liquid waste treatment system, the storage reaction pool includes a storage pool, and a plurality of artificial reaction pools are arranged on the upper side of the storage pool. When there is a lot of material, it is processed separately to ensure that the material reacts fully before entering the next process.

[0012] In the aforementioned explosion-proof alkylation ion liquid waste treatment system, the storage tank is connected to a first reagent tank, the artificial reaction tank is connected to a second reagent tank, and both the first reagent tank and the second reagent tank are provided with a drug delivery device.

[0013] In the aforementioned explosion-proof alkylation ion liquid waste treatment system, the reagent in the first reagent tank is alkali solution, and the reagent in the second reagent tank is flocculant.

[0014] In the aforementioned explosion-proof alkylation ion liquid waste treatment system, a switch control valve is provided at the connection of each device to facilitate the control of the amount of material and the reaction time of the material.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The utility model is provided with a storage tank, which serves as a temporary storage point for materials to ensure that the materials in the reactor of the previous process react completely and the materials entering the further process can be cooled to room temperature. At the same time, there can be multiple storage tanks, which can allow the materials to be divided into quantitative small portions, which is convenient for adding reagents in the next step.

[0017] 2. Furthermore, a storage reaction pool is provided, which is divided into a storage pool and an artificial reaction pool. The storage pool and the artificial reaction pool are bridge-connected. After the reaction in the artificial reaction pool is complete, the switch control valve is opened, and the material enters the storage pool for the next step of reaction. In this way, the reaction is visible and more thorough.

[0018] 3. Furthermore, a wastewater pool is provided, and the wastewater from the filter press enters the storage tank, forming a closed loop, and no wastewater is discharged from the entire system.

[0019] In summary, the utility model has the advantages of no wastewater discharge, being more environmentally friendly, and making the materials react thoroughly, so that the dried sludge produced has higher stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a system schematic diagram of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the storage reaction tank in the utility model;

[0022] The marks in the attached drawings are: 1. storage tank, 2. reactor, 3. storage reaction tank, 31. storage tank, 32. artificial reaction tank, 4. filter press, 5. wastewater tank, 6. tail gas tank, 61. water tower, 62. tail gas absorption tower, 7. cold water tank, 81. first reagent tank, 82. second reagent tank. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] Embodiment. An explosion-proof alkylation ion liquid waste treatment system, comprising: Figure 1-Figure 2 As shown, it includes a storage tank 1, the number of which is two. The front side of the storage tank 1 is connected to a reactor 2. In order to further cool the material of the previous process, a cooling system and a temperature sensor are provided in the storage tank 1. The rear side of the storage tank 1 is connected to a storage reaction pool 3. The rear side of the storage reaction pool 3 is connected to a filter press 4. A wastewater pool 5 is provided at the lower side of the filter press 4. The wastewater pool 5 is connected to the storage tank 1 to form a closed loop.

[0025] The treatment system also includes a cold water pool 7, on which a cooling tower is provided. The cold water pool 7 is connected to the storage tank 1 and the reactor 2. One side of the reactor 2 is connected to the tail gas tank 6. The tail gas tank 6 includes a water tower 61. The water tower 61 is connected to the tail gas absorption tower 62 to absorb the tail gas generated by the reaction in the reactor 2.

[0026] The storage reaction pool 3 includes a storage pool 31, and three artificial reaction pools 32 are arranged on the upper side of the storage pool 31. The three artificial reaction pools 32 are bridge-connected to the storage pool 31, and a channel is arranged in the middle. A switch control valve is arranged in the channel. After the materials in the artificial reaction pool 32 react completely, they enter the storage pool 31 for the next step of reaction.

[0027] The storage pool 31 is connected to the first medicine tank 81, and the artificial reaction pool 32 is connected to the second medicine tank 82. The first medicine tank 81 and the second medicine tank 82 are both provided with pump-type drug delivery devices, which can achieve timed and quantitative drug delivery.

[0028] The reagent in the first reagent tank 81 is alkali solution, specifically a sodium hydroxide solution with a mass concentration of 23%, and the reagent in the second reagent tank 82 is a flocculant.

[0029] Each device connection is equipped with a switch control valve to control the materials in various devices to enter the next process.

[0030] Reaction process: the alkylation ionic liquid waste liquid material enters the reactor 2, and cold water is continuously introduced into the reactor 2. The waste liquid reacts violently and generates a high temperature greater than 100 degrees Celsius. The generated waste gas is absorbed by the tail gas tank 6. The reaction waste liquid is cooled for a period of time and enters the storage tank 1 for further cooling. After cooling to room temperature, the material enters each artificial reaction pool 32. The first reagent tank 81 quantitatively doses the material into the artificial reaction pool 32. It is manually determined whether the material forms a paste ionic liquid. If the material forms a paste ionic liquid, the reaction is complete and the next process can be entered. The paste ionic liquid enters the storage pool 31, and the second reagent tank 82 quantitatively doses the material into the storage pool 31 to form an ion precipitate, which means that the reaction is complete. The ion precipitate passes through the filter press 4 to separate part of the wastewater to form a desiccant sludge. The desiccant sludge is packaged and enters the next step of the treatment device. The wastewater enters the wastewater pool 5, and the wastewater in the wastewater pool 5 enters the storage tank 1 again.

[0031] The system does not generate wastewater during operation. Compared with the original alkylation ion liquid waste, the amount of dryable sludge formed after treatment by the system is greatly reduced, and the cost of the next step of treatment is greatly reduced.

Claims

1. An explosion-proof alkylation ion liquid waste treatment system, characterized in that: The invention comprises a storage tank (1), wherein the front side of the storage tank (1) is connected to a reactor (2), the rear side of the storage tank (1) is connected to a material storage reaction pool (3), the rear side of the material storage reaction pool (3) is connected to a filter press (4), a wastewater pool (5) is provided at the lower side of the filter press (4), and the wastewater pool (5) is connected to the storage tank (1).

2. The explosion-proof alkylation ion liquid waste treatment system according to claim 1, characterized in that: The storage tank (1) is provided with a cooling system and a temperature sensor.

3. The explosion-proof alkylation ion liquid waste treatment system according to claim 1, characterized in that: The number of the storage tanks (1) is multiple.

4. The explosion-proof alkylation ionic liquid waste treatment system according to claim 1, characterized in that: It also comprises a cold water pool (7), on which a cooling tower is provided. The cold water pool (7) is connected to the storage tank (1) and the reactor (2), and one side of the reactor (2) is connected to the tail gas tank (6).

5. The explosion-proof alkylation ion liquid waste treatment system according to claim 4, characterized in that: The tail gas tank (6) comprises a water tower (61), and the water tower (61) is connected to a tail gas absorption tower (62).

6. The explosion-proof alkylation ion liquid waste treatment system according to claim 1, characterized in that: The material storage reaction pool (3) comprises a material storage pool (31), and a plurality of artificial reaction pools (32) are arranged on the upper side of the material storage pool (31).

7. The explosion-proof alkylation ion liquid waste treatment system according to claim 6, characterized in that: The material storage tank (31) is connected to the first medicine tank (81), and the artificial reaction tank (32) is connected to the second medicine tank (82). Both the first medicine tank (81) and the second medicine tank (82) are provided with drug delivery devices.

8. The explosion-proof alkylation ion liquid waste treatment system according to claim 7, characterized in that: The first reagent tank (81) is an alkali liquid tank, and the second reagent tank (82) is a flocculant tank.

9. An explosion-proof alkylation ion liquid waste treatment system according to any one of claims 1 to 8, characterized in that: Each device connection is equipped with a switch control valve.

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