Phenol tower distributor for phenol ammonia recovery system

Abstract

The utility model provides a phenol tower distributor for a phenol ammonia recovery system, which comprises a phenol tower and an MIBK feed distributor, the phenol tower comprises a bottom fixed part, a barrel and a top elliptical head part, a support convenient for supporting and fixing the MIBK feed distributor is arranged in the barrel, the MIBK feed distributor comprises an MIBK main tank, a first branch tank, a second branch tank and a third branch tank, and the first branch tank, the second branch tank and the third branch tank are communicated with each other. The phenol tower distributor rectification method is mature in technology and simple to operate, the purity of the regenerated extractant is high, and the influence on the extraction effect is small when the extractant is recycled; the alkali washing back extraction method has the characteristic of low energy consumption, but the impurity content of an extracting agent regenerated by the back extraction method is higher, and the recovered crude phenol exists in the form of a sodium phenolate solution. And compared with MIBK, the diisopropyl ether has the advantage that the distribution coefficient of the diisopropyl ether to polyphenol is low.

Description

Technical Field

[0001] This utility model relates to the field of jet tower technology, and in particular to a phenol tower distributor for a phenol and ammonia recovery system. Background Technology

[0002] The phenol-ammonia recovery process refers to a mass transfer separation process that utilizes the difference in solubility or partition coefficient of a compound in two immiscible (or slightly soluble) solvents to transfer the compound from one solvent to another, thereby achieving component separation. It is a widely used unit operation.

[0003] The phenol tower distributor is one of the important components of the phenol and ammonia recovery system. Most existing phenol tower distributors use diisopropyl ether, butyl acetate or 30% TBP-kerosene as extractants. These extractants have high energy consumption and large transaction volume, and are also prone to causing secondary pollution to the purified water. Utility Model Content

[0004] The purpose of this invention is to provide a phenol tower distributor for a phenol-ammonia recovery system. It features the advantages of mature distillation technology, simple operation, high purity of the regenerated extractant, and minimal impact on extraction efficiency during recycling. While the alkaline washing back-extraction method consumes less energy, the regenerated extractant has a higher impurity content, and the recovered crude phenol exists as a sodium phenolate solution. Furthermore, diisopropyl ether has the advantage of a lower partition coefficient for polyphenols compared to MIBK.

[0005] The purpose of this utility model is achieved as follows:

[0006] A phenol tower distributor for a phenol-ammonia recovery system is characterized in that it includes a phenol tower and a MIBK feed distributor. The phenol tower is vertically installed on the ground. The phenol tower includes a bottom fixed part, a cylindrical body, and a top elliptical end cap. The bottom fixed part is located at the bottom of the phenol tower, and the top elliptical end cap is located at the top of the phenol tower. There are multiple cylindrical bodies, which are arranged sequentially from bottom to top between the bottom fixed part and the top elliptical end cap.

[0007] The MIBK feed distributor is located in the bottommost cylinder. The cylinder contains a bracket for convenient support and fixation of the MIBK feed distributor. The bracket is fixed below the MIBK feed distributor by welding. The bottom of the MIBK feed distributor is detachably fixed to the bracket via bolts, nuts, and connecting holes. The left side of the MIBK feed distributor is also detachably fixed to the cylinder via bolts, nuts, and connecting holes. The MIBK feed distributor includes a main MIBK trough, a first branch trough, a second branch trough, and a third branch trough. The main MIBK trough is horizontally arranged. There are two sets of first, second, and third branch troughs, symmetrically arranged in front of and behind the main MIBK trough. Each set of third branch troughs is located in the middle of the main MIBK trough. Each set of second branch troughs has two sections, symmetrically arranged on either side of the third branch trough. Each set of first branch troughs also has two sections, symmetrically arranged on either side of the second branch trough.

[0008] Furthermore, the main MIBK channel is provided with distributor support angle steel at the front and rear for easy fixing of the first, second, and third branch channels. The inner side of the distributor support angle steel is connected by a connecting plate. The outer side of the connecting plate is fixedly connected to the cylinder, and the inner side of the connecting plate is fixedly connected to the distributor support angle steel by bolts and nuts. Fixing blocks are provided on both sides of the first, second, and third branch channels. The inner side of the fixing blocks is fixedly connected to both sides of the first, second, and third branch channels. The fixing blocks are provided with fixing holes. The fixing blocks are fixedly mounted on the distributor support angle steel through the holes and bolts and nuts.

[0009] Furthermore, the feed inlet of the MIBK main trough is equipped with an inlet sealing and clamping plate.

[0010] Furthermore, a tail fixing connection plate is provided on the left side surface of the MIBK main trough. The tail fixing connection plate is provided with holes for connection and fixing. The MIBK feed distributor is fixed in the cylinder through the tail fixing connection plate, holes and bolts and nuts.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] The extraction solvent recovery method for this phenol tower distributor is based on several mature technologies. Distillation is technically mature, simple to operate, and low in cost, producing high-purity regenerated solvent with minimal impact on extraction efficiency during recycling. Alkali washing back-extraction is energy-efficient, but the regenerated solvent has a higher impurity content, and the recovered crude phenol exists as a sodium phenolate solution. Furthermore, diisopropyl ether has a lower partition coefficient for polyphenols compared to MIBK. Considering all these factors, MIBK is the selected extraction solvent for this process. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a phenol tower.

[0014] Figure 2 This is the main view of the MIBK distributor.

[0015] Figure 3 This is a top view of the MIBK distributor.

[0016] Figure 4 This is the right view of the MIBK distributor.

[0017] Figure 5 This is a left view of the MIBK feed inlet.

[0018] Among them, 1 is the phenol tower, 11 is the bottom fixed part, 12 is the cylinder, 13 is the top elliptical head part, 2 is the MIBK feed distributor, 21 is the MIBK main trough, 22 is the first branch trough, 23 is the second branch trough, 24 is the third branch trough, 25 is the fixing block, 3 is the bracket, 5 is the angle steel supporting the distributor branch trough pipe, 6 is the connecting plate, 7 is the inlet sealing and pressing plate, and 8 is the tail fixed connecting plate. Detailed Implementation

[0019] like Figure 1-5 As shown, a phenol tower distributor for a phenol-ammonia recovery system is characterized by comprising a phenol tower 1 and a MIBK feed distributor 2. The phenol tower 1 is vertically installed on the ground. The phenol tower 1 includes a bottom fixed part 11, a cylinder 12, and a top elliptical end cap 13. The bottom fixed part 11 is located at the bottom of the phenol tower 1, and the top elliptical end cap 13 is located at the top of the phenol tower 1. There are multiple cylinders 12, which are arranged sequentially from bottom to top between the bottom fixed part 11 and the top elliptical end cap 13.

[0020] The MIBK feed distributor 2 is located inside the lowest cylinder 12. The cylinder 12 contains a support 3 for convenient support and fixation of the MIBK feed distributor 2. The support 3 is fixedly installed below the MIBK feed distributor 2 by welding. The bottom of the MIBK feed distributor 2 is detachably fixed to the support 3 via bolts, nuts, and connecting holes. Furthermore, the left side of the MIBK feed distributor 2 is detachably fixed to the cylinder 12 via bolts, nuts, and connecting holes. The MIBK feed distributor 2 includes a main MIBK slot 21, a first branch slot 22, and a second branch slot 23. The MIBK main channel 21 is horizontally arranged with two sets of first, second, and third branch channels 22 and 23, respectively. The two sets of first, second, and third branch channels 24 are symmetrically arranged in front of and behind the MIBK main channel 21. Each set of third branch channels 24 is located in the middle of the MIBK main channel 21. Each set of second branch channels 23 has two channels, which are symmetrically arranged on both sides of the third branch channel 24. Each set of first branch channels 22 has two channels, which are symmetrically arranged on both sides of the second branch channel 23.

[0021] Furthermore, the MIBK main channel 21 is provided with distributor support angle steel 5 at the front and rear for convenient fixing of the first support channel 22, the second support channel 23 and the third support channel 24. The inner side of the distributor support angle steel 5 is connected by a connecting plate 6. The outer side of the connecting plate 6 is fixedly connected to the cylinder 12, and the inner side of the connecting plate 6 is fixedly connected to the distributor support angle steel 5 by bolts and nuts. Fixing blocks 25 are provided on both sides of the first support channel 22, the second support channel 23 and the third support channel 24. The inner side of the fixing block 25 is fixedly connected to both sides of the first support channel 22, the second support channel 23 and the third support channel 24. The fixing block 25 is provided with fixing holes. The fixing block 25 is fixedly mounted on the distributor support angle steel 5 through the holes and bolts and nuts.

[0022] Furthermore, the feed inlet of the MIBK main trough 21 is provided with an inlet sealing and clamping plate 7.

[0023] Furthermore, a tail fixing connection plate 8 is provided on the left side surface of the MIBK main channel 21. The tail fixing connection plate 8 is provided with holes for connection and fixing. The MIBK feed distributor 2 is fixed in the cylinder 12 through the tail fixing connection plate 8, the holes and bolts and nuts.

[0024] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A phenol tower distributor for a phenol-ammonia recovery system, characterized in that, The system includes a phenol tower (1) and a MIBK feed distributor (2). The phenol tower (1) is vertically installed on the ground. The phenol tower (1) includes a bottom fixed part (11), a cylinder (12) and a top elliptical end cap (13). The bottom fixed part (11) is installed at the bottom of the phenol tower (1), and the top elliptical end cap (13) is installed at the top of the phenol tower (1). There are multiple cylinders (12), and multiple cylinders (12) are arranged from bottom to top between the bottom fixed part (11) and the top elliptical end cap (13). The MIBK feed distributor (2) is located inside the lowest cylinder (12). The cylinder (12) contains a bracket (3) for convenient support and fixation of the MIBK feed distributor (2). The bracket (3) is fixedly installed below the MIBK feed distributor (2) by welding. The bottom of the MIBK feed distributor (2) is detachably fixed to the bracket (3) via bolts, nuts, and connecting holes. The left side of the MIBK feed distributor (2) is also detachably fixed to the cylinder (12) via bolts, nuts, and connecting holes. The MIBK feed distributor (2) includes a main MIBK slot (21), a first branch slot (22), and a second branch slot (23). 23) Third branch groove (24): The MIBK main groove (21) is horizontally arranged. There are two sets of first branch groove (22), second branch groove (23) and third branch groove (24). The two sets of first branch groove (22), second branch groove (23) and third branch groove (24) are symmetrically arranged in front of and behind the MIBK main groove (21). Each set of third branch groove (24) is located in the middle of the MIBK main groove (21). There are two sets of second branch groove (23). The two sets of second branch groove (23) are symmetrically arranged on both sides of the third branch groove (24). There are two sets of first branch groove (22). The two sets of first branch groove (22) are symmetrically arranged on both sides of the second branch groove (23).

2. The phenol tower distributor for a phenol-ammonia recovery system according to claim 1, characterized in that: The MIBK main channel (21) is provided with distributor support angle steel (5) in front and behind to facilitate fixing the first branch channel (22), the second branch channel (23) and the third branch channel (24). The distributor support angle steel (5) is connected to the inner side by a connecting plate (6). The outer side of the connecting plate (6) is fixedly connected to the cylinder (12). The inner side of the connecting plate (6) is fixedly connected to the distributor support angle steel (5) by bolts and nuts. The first branch channel (22), the second branch channel (23) and the third branch channel (24) are respectively provided with fixing blocks (25). The inner side of the fixing block (25) is fixedly connected to the first branch channel (22), the second branch channel (23) and the third branch channel (24). The fixing block (25) is provided with fixing holes. The fixing block (25) is fixedly installed on the distributor support angle steel (5) through the holes and bolts and nuts.

3. A phenol tower distributor for a phenol-ammonia recovery system according to claim 1, characterized in that: The feed inlet of the MIBK main trough (21) is provided with an inlet sealing and pressing plate (7).

4. A phenol tower distributor for a phenol-ammonia recovery system according to claim 1, characterized in that: The left side surface of the MIBK main channel (21) is provided with a tail fixing connection plate (8), and the tail fixing connection plate (8) is provided with holes for connection and fixing. The MIBK feed distributor (2) is fixed in the cylinder (12) through the tail fixing connection plate (8), the holes and bolts and nuts.

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