阅读说明：本技术 用于消除脱硫胺液发泡的泡沫分离装置和方法 (Foam separation device and method for eliminating foaming of desulfurized amine liquid ) 是由 杜延年 王宁 包振宇 段永锋 张宏飞 刘希武 于凤昌 于 2020-08-06 设计创作，主要内容包括：本发明涉及分离技术领域,具体而言,涉及一种用于消除脱硫胺液发泡的泡沫分离装置和方法。本发明提供一种用于消除脱硫胺液发泡的泡沫分离装置,包括发泡单元、泡沫传输单元及消泡存储单元,发泡单元设置于泡沫传输单元的一侧,并与泡沫传输单元连通；消泡存储单元设置于泡沫传输单元的另一侧,并与泡沫传输单元连接；发泡单元包括提升泡沫表面积的微气泡发生器和提升分离时间的沉降分离器,沉降分离器的一端与泡沫传输单元连通,微气泡发生器设置于所述沉降分离器的另一端。其能够显著提高了泡沫分离表面活性剂的浓缩比,改善胺液的发泡问题,且改善炼厂脱硫系统中胺液的发泡导致胺液损耗大的问题。(The invention relates to the technical field of separation, in particular to a foam separation device and method for eliminating foaming of desulfurized amine liquid. The invention provides a foam separation device for eliminating foaming of a desulfurized amine liquid, which comprises a foaming unit, a foam transmission unit and a defoaming storage unit, wherein the foaming unit is arranged on one side of the foam transmission unit and is communicated with the foam transmission unit; the defoaming storage unit is arranged on the other side of the foam transmission unit and is connected with the foam transmission unit; the foaming unit is including promoting the microbubble generator of foam surface area and the separator that subsides that promotes the separation time, and the one end and the foam transmission unit intercommunication of separator that subsides, microbubble generator set up in separator's the other end subsides. The method can obviously improve the concentration ratio of the foam separation surfactant, improve the foaming problem of the amine liquid, and solve the problem of large amine liquid loss caused by the foaming of the amine liquid in a refinery desulfurization system.)

1. A foam separation device for eliminating foaming of desulfurized amine liquid is characterized by comprising a foaming unit, a foam transmission unit and a defoaming storage unit, wherein the foaming unit is arranged on one side of the foam transmission unit and is communicated with the foam transmission unit; the defoaming storage unit is arranged on the other side of the foam transmission unit and is connected with the foam transmission unit;

the foaming unit is including promoting the microbubble generator of foam surface area and the separator that subsides that promotes the separation time, the one end of separator that subsides with foam transmission unit intercommunication, microbubble generator set up in the other end of separator that subsides.

2. The foam separating device for eliminating the foaming of the desulfurized amine according to claim 1, wherein said foaming unit further comprises an amine liquid storage tank, an amine liquid feeding distributor and a gas distributor, said micro bubble generator, said amine liquid feeding distributor and said gas distributor are all disposed in said amine liquid storage tank and are respectively connected with said amine liquid storage tank, and said liquid storage tank is communicated with said sedimentation separator.

3. The foam separating device for eliminating foaming of desulfurized amine liquid according to claim 2, wherein said micro-bubble generator, said amine liquid feed distributor and said gas distributor are disposed in said amine liquid storage tank in this order along a side relatively distant from said settling separator.

4. The foam separating device for eliminating the foaming of the desulfurized amine liquid according to claim 2 or 3, wherein the microbubble generator, the amine liquid feeding distributor and the gas distributor are all arranged annularly in the amine liquid storage tank, and the diameters of the formed rings after the annular arrangement are sequentially from large to small, namely the gas distributor, the microbubble generator and the amine liquid feeding distributor.

5. The foam separating device for eliminating foaming of desulfurized amine according to claim 1, wherein said foam transmission unit comprises a primary foam transmitter, a foam grower and a secondary foam transmitter which are sequentially communicated, and said primary foam transmitter is connected with one end of said sedimentation separator which is relatively far away from said microbubble generator.

6. The foam separating device for eliminating the foaming of the desulfurized amine liquid according to claim 5, wherein the primary foam conveyer is cylindrical, the foam grower is spherical, and the secondary foam conveyer is in an inverted "U" shape.

7. The foam separating device for eliminating foaming of a desulfurized amine liquid according to claim 5 or 6, wherein said settling separator is spherical, and the diameter of the cross section of said foam grower and the diameter of the cross section of said settling separator are respectively larger than the diameter of the cross section of said primary foam conveyer.

8. The foam separation device for eliminating foaming of a desulfurized amine liquid according to claim 7, wherein the defoaming storage unit comprises a primary defoaming net, a secondary defoaming net and a waste liquid storage tank, the waste liquid storage tank is connected with the secondary foam conveyer at a side opposite to the foam generator, the primary defoaming net is arranged in the secondary foam conveyer and connected with the secondary foam conveyer, and the secondary defoaming net is arranged in the waste liquid storage tank and is positioned at an inlet of the waste liquid storage tank;

preferably, the material for preparing the primary defoaming net and the secondary defoaming net is any one of polytetrafluoroethylene, polyvinylidene fluoride and polyperfluoroethylene;

preferably, the surfaces of the materials forming the primary defoaming net and the secondary defoaming net are both subjected to hydrophilic and oleophobic modification by a modification material;

preferably, the modifying material is at least one of silica, polyacrylamide, polyacrylic acid, and polyvinyl alcohol.

9. The foam separation device for eliminating foaming of desulfurized amine according to claim 8, further comprising an induced draft fan, wherein said waste liquid storage tank and said microbubble generator are connected to said induced draft fan respectively.

10. A method for eliminating foaming of a desulfurized amine liquid, comprising: eliminating the foaming of the desulfurized amine liquid by using the foam separating device for eliminating the foaming of the desulfurized amine liquid according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of separation, in particular to a foam separation device and method for eliminating foaming of desulfurized amine liquid.

Background

The desulfurization process in a refinery mainly adopts dry gas and liquefied gas, the desulfurization process mostly adopts an organic amine absorption and regeneration technology, hydrocarbon components, heat stable salts and other impurities in the amine liquid can gradually rise in the cyclic regeneration use process of the amine liquid, the surface tension of the amine liquid can be increased due to the existence of part of the impurities, the amine liquid generates a foaming phenomenon in a desulfurization tower, and the amine liquid foam is easily carried out of the tower top by a desulfurization process medium, so that the amine liquid loss is caused. The traditional treatment process of the regenerated lean amine liquid is a surfactant separation, mechanical filtration, activated carbon adsorption and ion exchange technology, but the separation of the surfactant at the front end is not thorough, so that the cleaning period and the replacement period of a subsequent device are shortened, and the operation cost is increased; in addition, in order to solve the problem of foaming of the amine liquid, a defoaming agent is usually added, but the defoaming agent is also a surfactant, and the foaming of the amine liquid is accelerated when the addition amount is accumulated to a certain extent, so that how to inhibit the foaming of the amine liquid in the desulfurization device, thereby reducing the amine liquid loss of the device and prolonging the operation period of the subsequent device is one problem to be solved.

The foam separation technology is a technology for separating and concentrating surface active substances by using air bubbles as carriers, and is firstly applied to mineral flotation and recovery of useful additives in industrial wastewater. In the 70 s, foam separation technology was introduced into the field of biological separation, such as separation and purification of proteins and enzymes. In the foam separation process, other solvents are not required to be added, only air or other inert gases are required to be introduced, and the technology has the advantages of simple equipment, low investment, low energy consumption, no pollution and the like, and is widely applied. When the foam separation technology is adopted to separate the surfactant in the amine liquid, in order to improve the separation efficiency of the surfactant, the foam drainage of the foam phase is a key, so far, in the foam separation process, the drainage of the foam phase completely depends on that the liquid among the bubbles flows back to the main liquid phase from top to bottom under the action of gravity, and because the bubbles flow from bottom to top along the tower and the liquid to be discharged carried by the bubbles flows from top to bottom in the foam drainage process, the liquid to be discharged carried by the bubbles flows from top to bottom, and the liquid to be discharged carried by the bubbles and the liquid to be discharged is in counter flow, the flow resistance is large, and the drainage is difficult. Therefore, the effect of foam separation is still not good.

Disclosure of Invention

The invention aims to provide a foam separation device and a foam separation method for eliminating foaming of desulfurized amine liquid, which can obviously improve the concentration ratio of a foam separation surfactant, improve the foaming problem of the amine liquid and improve the problem of large amine liquid loss caused by the foaming of the amine liquid in a desulfurization system of a refinery.

Embodiments of the invention may be implemented as follows:

in a first aspect, an embodiment of the present invention provides a foam separation device for eliminating foaming of a desulfurized amine liquid, including a foaming unit, a foam transmission unit and a defoaming storage unit, where the foaming unit is disposed on one side of the foam transmission unit and is communicated with the foam transmission unit; the defoaming storage unit is arranged on the other side of the foam transmission unit and is connected with the foam transmission unit;

the foaming unit is including promoting the microbubble generator of foam surface area and the separator that subsides that promotes the separation time, and the one end and the foam transmission unit intercommunication of separator that subsides set up in the microbubble generator in separator's the other end that subsides.

In optional embodiment, the foaming unit still includes amine liquid storage pot, amine liquid feeding distributor and gas distributor, microbubble generator amine liquid feeding distributor and gas distributor all set up in the amine liquid storage pot, and respectively with the amine liquid storage pot is connected, the liquid storage pot with subside separator intercommunication.

In an optional embodiment, the microbubble generator, the amine liquid feed distributor, and the gas distributor are sequentially disposed in the amine liquid storage tank along a side relatively far from the settling separator.

In optional implementation mode, microbubble generator amine liquid feeding distributor and gas distributor is in all be the annular setting in the amine liquid receiver tank, and the diameter that forms the ring behind the annular setting is gas distributor, microbubble generator and amine liquid feeding distributor by big order to little.

In an optional embodiment, the foam transmission unit comprises a primary foam transmitter, a foam grower and a secondary foam transmitter which are sequentially communicated, and the primary foam transmitter is connected with one end of the sedimentation separator, which is relatively far away from the microbubble generator.

In an alternative embodiment, the primary foam conveyor is cylindrical, the foam grower is spherical, and the secondary foam conveyor is in the shape of an inverted "U".

In an alternative embodiment, the settling separator is spherical and the diameter of the cross-section of the foam grower and the diameter of the cross-section of the settling separator are each greater than the diameter of the cross-section of the primary foam transferor.

In an optional embodiment, the defoaming storage unit includes a primary defoaming net, a secondary defoaming net and a waste liquid storage tank, the waste liquid storage tank is connected with one side of the secondary foam conveyer relatively far away from the foam generator, the primary defoaming net is arranged in the secondary foam conveyer and connected with the secondary foam conveyer, and the secondary defoaming net is arranged in the waste liquid storage tank and located at an inlet of the waste liquid storage tank;

preferably, the material for preparing the primary defoaming net and the secondary defoaming net is any one of polytetrafluoroethylene, polyvinylidene fluoride and polyperfluoroethylene;

preferably, the surfaces of the materials forming the primary defoaming net and the secondary defoaming net are both subjected to hydrophilic and oleophobic modification by a modification material;

preferably, the modifying material is at least one of silica, polyacrylamide, polyacrylic acid, and polyvinyl alcohol.

In an optional implementation mode, the foam separation device further comprises an induced draft fan, and the waste liquid storage tank and the micro-bubble generator are respectively connected with the induced draft fan.

In a second aspect, embodiments of the present invention provide a method for eliminating foaming of a desulfurized amine liquid, including eliminating foaming of the desulfurized amine liquid by using the foam separation device for eliminating foaming of the desulfurized amine liquid.

The embodiment of the invention has the beneficial effects that by arranging the micro-bubble generator for increasing the surface area of the foam and the sedimentation separator for increasing the separation time, the surface area of the formed foam can be increased, the separation time is prolonged, the liquid discharge is strengthened on the basis of gravity liquid discharge, the concentration ratio of the foam separation surfactant is obviously increased, the foaming problem of the amine liquid is improved, the recovery amount of the amine liquid can be increased, and the loss of the amine liquid is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a foam separation apparatus provided in example 1 of the present invention;

fig. 2 is a schematic diagram of the position relationship of the gas distributor, the bubble generator and the settling separator provided in example 1 of the present invention.

Icon: 100-a foam separation device; 110-a foaming unit; 120-a foam transfer unit; 130-a defoaming storage unit; a 111-amine liquid storage tank; 112-amine liquid feed distributor; 113-a circulation pump; 114-a gas distributor; 115-a microbubble generator; 116-a settling separator; 121-primary foam conveyor; 122-a foam grower; 123-secondary foam conveyor; 131-first-level defoaming net; 132-a secondary defoaming net; 133-a waste liquid storage tank; 134-induced draft fan; 117-compressor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.