阅读说明：本技术 一种溶剂尾气吸收系统矿物油自动分水装置及工艺方法 (Automatic mineral oil water separation device of solvent tail gas absorption system and process method ) 是由 王彬 史永革 刘作威 王丹 于 2021-08-11 设计创作，主要内容包括：一种溶剂尾气吸收系统矿物油自动分水装置及工艺方法,属于尾气处理技术领域。本发明包括解析塔、贫油泵、换热器、贫油冷却器、吸收塔、富油泵、富油加热器和尾气风机,解析塔底部通过贫油泵与换热器的d入口连接,换热器的b出口通过贫油冷却器与吸收塔连接,吸收塔底部通过富油泵与换热器的c入口连接,换热器的a出口通过富油加热器与解析塔顶部连接,吸收塔顶部安装有尾气风机,还包括自动排水箱,贫油冷却器和吸收塔之间连通的管道上设置有自动排水箱。本发明目的是为了解决现有尾气系统石蜡油中废水排放为人工排水：人工排放可靠性差,且人为因素较多的问题,实现吸收塔进油前石蜡油自动排水,降低溶剂消耗和降低环境污染。(An automatic mineral oil water separation device of a solvent tail gas absorption system and a process method belong to the technical field of tail gas treatment. The invention comprises an analytic tower, a lean oil pump, a heat exchanger, a lean oil cooler, an absorption tower, an oil-rich pump, an oil-rich heater and a tail gas fan, wherein the bottom of the analytic tower is connected with an inlet d of the heat exchanger through the lean oil pump, an outlet b of the heat exchanger is connected with the absorption tower through the lean oil cooler, the bottom of the absorption tower is connected with an inlet c of the heat exchanger through the oil-rich pump, an outlet a of the heat exchanger is connected with the top of the analytic tower through the oil-rich heater, the top of the absorption tower is provided with the tail gas fan, the tail gas fan further comprises an automatic water drainage box, and an automatic water drainage box is arranged on a pipeline communicated between the lean oil cooler and the absorption tower. The invention aims to solve the problems that the waste water discharged from the paraffin oil of the existing tail gas system is artificially drained: the reliability of manual discharge is poor, and the problem that human factors are more realizes that paraffin oil automatic drainage before the absorption tower oil feed reduces solvent consumption and reduces environmental pollution.)

1. The utility model provides an automatic water installation that divides of solvent tail gas absorption system mineral oil which characterized in that: the absorption tower is characterized by comprising an analysis tower (1), a lean oil pump (2), a heat exchanger (3), a lean oil cooler (4), an absorption tower (5), a rich oil pump (6), a rich oil heater (7) and a tail gas fan (8), wherein the bottom of the analysis tower (1) is connected with a d inlet of the heat exchanger (3) through the lean oil pump (2), a b outlet of the heat exchanger (3) is connected with the absorption tower (5) through the lean oil cooler (4), the bottom of the absorption tower (5) is connected with a c inlet of the heat exchanger (3) through the rich oil pump (6), an a outlet of the heat exchanger (3) is connected with the top of the analysis tower (1) through the rich oil heater (7), the top of the absorption tower (5) is provided with the tail gas fan (8), and further comprising an automatic drainage box (9), and the automatic drainage box (9) is arranged on a pipeline communicated between the lean oil cooler (4) and the absorption tower (5);

automatic drain box (9) include shell body (91), inner bag (92) and negative pressure three-way pipe (93), inner bag (92) are installed to the center department of bottom in shell body (91), outer bag (91) and inner bag (92) only communicate through oil inlet (921) of seting up at inner bag (92) top, negative pressure three-way pipe (93) one end and shell body (91) top intercommunication, negative pressure three-way pipe (93) one end and shell body (91) bottom intercommunication, negative pressure three-way pipe (93) other end is the drainage pipe end, water inlet (911) have been seted up on shell body (91), inner bag (92) bottom and through U type pipeline (10) and absorption tower (5) intercommunication.

2. The mineral oil automatic water diversion device of solvent tail gas absorption system according to claim 1, characterized in that: and a U-shaped pipeline (10) is additionally arranged between the automatic drainage box (9) and the absorption tower (5).

3. The mineral oil automatic water diversion device of solvent tail gas absorption system according to claim 2, characterized in that: the inlet d and the outlet b of the heat exchanger (3) are communicated through a pipeline inside, and the inlet c and the outlet a of the heat exchanger (3) are communicated through a pipeline inside.

4. An automatic mineral oil water diversion process method of a solvent tail gas absorption system is realized based on any one of claims 1 to 3, and is characterized in that:

step one, enabling uncondensed free gas in the grease leaching process system to enter the lower part of an absorption tower (5);

step two, the absorption tower (5) is operated under negative pressure, paraffin oil is introduced from the upper part of the absorption tower (5), and the paraffin oil and free gas are absorbed in a countercurrent absorption operation mode to absorb solvent oil in the free gas;

conveying the rich oil absorbed by the paraffin oil in the step two from an inlet c to a heat exchanger (3) through a rich oil pump (6), exchanging heat in the heat exchanger (3), heating the rich oil by a rich oil heater (7), and then feeding the rich oil to an analytical tower (1) to analyze and separate the paraffin oil and the solvent oil, and recovering the solvent to a water distribution box;

step four, the paraffin oil analyzed in the step three, namely lean oil, is conveyed from the inlet d through a lean oil pump (2) to enter a heat exchanger (3), exchanges heat in the heat exchanger (3), is cooled through a lean oil cooler (4), and then enters an automatic drainage tank (9);

fifthly, automatically separating lean oil, paraffin oil and water in the automatic drainage tank (9);

step six, discharging the water obtained in the step five through a water discharge pipe end of an automatic water discharge box (9), enabling the discharged paraffin oil to enter an absorption tower (5), absorbing and purifying air in free gas through the paraffin oil, and then discharging the air to the outside under the action of a tail gas fan (8);

inside water inlet (911) the entering shell body (91) at lean oil follow automatic drainage case (9) top, lean oil is at the cavity internal rotation between shell body (91) and inner bag (92), and paraffin oil and water stratify in the lean oil, and paraffin oil is on the upper strata after the layering, and inside oil inlet (921) that utilizes the inner bag top got into the inner bag, then entered into absorption tower (5), and water is on the lower floor after the layering, from the negative pressure three-way pipe (93) discharge of shell body (91) bottom.

5. The mineral oil automatic water diversion process method of the solvent tail gas absorption system according to claim 4, characterized in that: the free gas is a mixed free gas of air and solvent gas.

6. The mineral oil automatic water diversion process method of the solvent tail gas absorption system according to claim 5, characterized in that: in the process from the first step to the sixth step, the drain valve at the bottom of the absorption tower (5) is opened in a graded manner to drain the water deposited in the absorption tower (5).

Technical Field

The invention relates to a device capable of automatically separating mineral oil in solvent tail gas, belonging to the technical field of tail gas treatment.

Background

The extraction method for preparing oil in the vegetable oil preparation industry is a commonly used oil preparation process, solvent consumption in tail gas emission accounts for a certain proportion, 2-2.5 kilograms of air in a system can enter a leaching workshop for producing and processing one ton of materials, and the air is called as free gas. The water content of the paraffin oil causes the paraffin oil to emulsify, which is reported to decrease the solvent absorption efficiency.

At present, the paraffin oil absorption mode all adopts negative pressure absorption process, and in the analytic process, the direct steam of part converts into water and enters into the paraffin oil, and the deposit is in the absorption tower bottom at last, in the production process, every group carries out drainage once to the absorption tower bottom, and waste water discharge is artifical drainage in this technology paraffin oil, and the artifical reliability that discharges is poor, discharges the separation thoroughly, can cause the wasting of resources, influences the whole work efficiency and the quality of next link, and the human factor is more.

Therefore, there is a need to provide a novel mineral oil automatic water diversion device for solvent tail gas absorption system to solve the above technical problems.

Disclosure of Invention

The invention aims to solve the problems that the waste water in the paraffin oil of the existing tail gas system is discharged by artificial drainage: problems with artificial emissions reliability and high human factors, a brief summary of the invention is provided below to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.

The technical scheme of the invention is as follows:

the utility model provides an automatic water installation that divides of solvent tail gas absorption system mineral oil, including analytic tower, the lean oil pump, the heat exchanger, the lean oil cooler, the absorption tower, rich oil pump, rich oil heater and tail gas fan, d entry linkage through lean oil pump and heat exchanger is passed through to analytic tower bottom, the b export of heat exchanger is passed through the lean oil cooler and is connected with the absorption tower, the c entry linkage through rich oil pump and heat exchanger is passed through to the absorption tower bottom, rich oil heater and analytic tower top are passed through in the a export of heat exchanger are connected, the tail gas fan is installed at the absorption tower top, still include automatic drainage box, be provided with automatic drainage box on the pipeline of intercommunication between lean oil cooler and the absorption tower.

Preferably: the inlet d and the outlet b of the heat exchanger are communicated through a pipeline inside, and the inlet c and the outlet a of the heat exchanger are communicated through a pipeline inside.

In order to solve the problems of realizing automatic drainage of a paraffin oil system and improving the reliability and stability of drainage, the invention provides the technical scheme that:

preferably: and a U-shaped pipeline is additionally arranged between the automatic drainage box and the absorption tower.

Preferably: the automatic drainage box comprises an outer shell, an inner container and a negative pressure three-way pipe, wherein the inner container is installed at the center of the bottom in the outer shell, the outer shell and the inner container are communicated only through an oil inlet formed in the top of the inner container, one end of the negative pressure three-way pipe is communicated with the top of the outer shell, one end of the negative pressure three-way pipe is communicated with the bottom of the outer shell, the other end of the negative pressure three-way pipe is a drainage pipe end, a water inlet is formed in the outer shell, and the bottom of the inner container is communicated with an absorption tower through a U-shaped pipeline.

A mineral oil automatic water diversion process method of a solvent tail gas absorption system comprises the following steps:

step one, enabling uncondensed free gas in the grease leaching process system to enter the lower part of an absorption tower;

step two, performing negative pressure operation on the absorption tower, introducing paraffin oil from the upper part of the absorption tower, performing countercurrent absorption operation on the paraffin oil and free gas, and absorbing solvent oil in the free gas;

conveying the rich oil absorbed by the paraffin oil in the step two from an inlet c into a heat exchanger through a rich oil pump, exchanging heat in the heat exchanger, heating the rich oil by a rich oil heater, then feeding the rich oil into an analytical tower, carrying out analytical separation on the paraffin oil and the solvent oil, and recovering the solvent to a water separation tank;

step four, the paraffin oil analyzed in the step three, namely lean oil, is conveyed from the inlet d through a lean oil pump to enter a heat exchanger, exchanges heat in the heat exchanger, is cooled through a lean oil cooler, and then enters an automatic drainage box;

fifthly, automatically separating lean oil, paraffin oil and water in the automatic drainage tank;

step six, discharging the water obtained in the step five through a drainage pipeline of an automatic drainage box, enabling the drained paraffin oil to enter an absorption tower, absorbing and purifying the air in the free gas through the paraffin oil, and then discharging the air to the outside under the action of a tail gas fan;

preferably: the free gas is a mixed free gas of air and solvent gas.

Preferably: and in the process from the first step to the sixth step, the drainage valves at the bottom of the absorption tower are opened in times to discharge the water deposited in the absorption tower.

Preferably: inside the water inlet entering shell body at automatic drainage box top was followed to the lean oil, the cavity internal rotation of lean oil between shell body and inner bag, paraffin oil and water carried out the layering in the lean oil, and the paraffin oil was on the upper strata after the layering, and inside utilizing the oil inlet at inner bag top to get into the inner bag, then entered into the absorption tower, and the water was discharged from the negative pressure three-way pipe of shell body bottom in the lower floor after the layering.

The invention has the following beneficial effects:

1. according to the automatic mineral oil water diversion device of the solvent tail gas absorption system, automatic drainage of paraffin oil before oil feeding of an absorption tower is realized, the water content of the paraffin oil is reduced, the absorption effect is improved, the solvent consumption is reduced, and the environmental pollution is reduced;

2. according to the automatic mineral oil water diversion device of the solvent tail gas absorption system, the problem of poor reliability of manual discharge is solved, discharge and separation are thorough, resources are saved, the production waste cost is reduced, the overall working efficiency and quality of the next link are optimized, and the possibility of adverse influence of human factors on production is reduced;

3. the mineral oil automatic water diversion device of the solvent tail gas absorption system is simple in structure, ingenious in design, low in cost and suitable for popularization and application.

Drawings

FIG. 1 is a schematic structural diagram of an automatic mineral oil water diversion device of a solvent tail gas absorption system;

FIG. 2 is a schematic view showing the construction of an automatic drain tank according to the present invention;

FIG. 3 is a top view of the automatic water discharge tank of the present invention;

in the figure, 1-a desorption tower, 2-a lean oil pump, 3-a heat exchanger, 4-a lean oil cooler, 5-an absorption tower, 6-an oil-rich pump, 7-an oil-rich heater, 8-a tail gas fan, 9-an automatic drainage tank, 10-a U-shaped pipeline, 91-an outer shell, 92-an inner container, 93-a negative pressure three-way pipe, 911-a water inlet and 921-an oil inlet.

Detailed Description

In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The connection mentioned in the invention is divided into fixed connection and detachable connection, the fixed connection is non-detachable connection and includes but is not limited to folding edge connection, rivet connection, bonding connection, welding connection and other conventional fixed connection modes, the detachable connection includes but is not limited to threaded connection, snap connection, pin connection, hinge connection and other conventional detachment modes, when the specific connection mode is not clearly limited, at least one connection mode can be found in the existing connection modes by default to realize the function, and the skilled person can select according to the needs. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to fig. 3, and the mineral oil automatic water diversion device of the solvent tail gas absorption system of the embodiment includes an analytic tower 1, a lean oil pump 2, a heat exchanger 3, a lean oil cooler 4, an absorption tower 5, a rich oil pump 6, a rich oil heater 7 and a tail gas fan 8, wherein the bottom of the analytic tower 1 is connected with an inlet d of the heat exchanger 3 through the lean oil pump 2, an outlet b of the heat exchanger 3 is connected with the absorption tower 5 through the lean oil cooler 4, the bottom of the absorption tower 5 is connected with an inlet c of the heat exchanger 3 through the rich oil pump 6, an outlet a of the heat exchanger 3 is connected with the top of the analytic tower 1 through the rich oil heater 7, and the top of the absorption tower 5 is provided with the tail gas fan 8, and is characterized in that: still including automatic water drainage tank 9, be provided with automatic water drainage tank 9 on the pipeline of intercommunication between lean oil cooler 4 and the absorption tower 5, add the automatic water diversion device 9 of paraffin oil between lean oil cooler 4 and the absorption tower 5, utilize paraffin oil insoluble in water and there is density difference between the two, realize oil-water separation.

A U-shaped pipeline 10 is additionally arranged between the automatic drainage box 9 and the absorption tower 5, and the U-shaped pipeline 10 is additionally arranged before paraffin oil enters the absorption tower 5, so that automatic drainage of a paraffin oil system is realized, and the reliability and the stability of drainage are improved.

The inlet d and the outlet b of the heat exchanger 3 are communicated with each other through a pipeline inside, and the inlet c and the outlet a of the heat exchanger 3 are communicated with each other through a pipeline inside.

As shown in fig. 2, the automatic water draining tank 9 includes an outer casing 91, an inner container 92 and a negative pressure three-way pipe 93, the inner container 92 is installed at the center of the bottom in the outer casing 91, the outer casing 91 and the inner container 92 are only communicated through an oil inlet 921 arranged at the top of the inner container 92, one end of the negative pressure three-way pipe 93 is communicated with the top of the outer casing 91, one end of the negative pressure three-way pipe 93 is communicated with the bottom of the outer casing 91, the other end of the negative pressure three-way pipe 93 is a water draining pipe end, a water inlet 911 is arranged on the outer casing 91, and the bottom of the inner container 92 is communicated with the absorption tower 5 through a U-shaped pipeline 10.

The second embodiment is as follows: the embodiment is described with reference to fig. 1 to fig. 3, and based on the first embodiment, the method for automatically dividing water into mineral oil in a solvent tail gas absorption system of the embodiment comprises the following steps:

step one, enabling uncondensed free gas in the grease leaching process system to enter the lower part of an absorption tower 5;

step two, the absorption tower 5 is a packed tower, the absorption tower 5 is operated under negative pressure, paraffin oil is introduced from the upper part of the absorption tower 5, the paraffin oil and free gas are absorbed in a countercurrent mode, and the solvent oil in the free gas is absorbed by utilizing the principle that the paraffin oil is dissolved in the solvent and does not dissolve air;

step three, conveying the rich oil formed after the paraffin oil is absorbed in the step two from an inlet c into a heat exchanger 3 through a rich oil pump 6, exchanging heat in the heat exchanger 3, heating the rich oil through a rich oil heater 7, then feeding the rich oil into an analytical tower 1, carrying out analytical separation on the paraffin oil and the solvent oil, and recovering the solvent to a water distribution box;

step four, the paraffin oil analyzed in the step three, namely lean oil, is conveyed from the inlet d through the lean oil pump 2 to enter the heat exchanger 3, exchanges heat in the heat exchanger 3, is cooled through the lean oil cooler 4, and then enters the automatic drainage tank 9;

fifthly, automatically separating lean oil, paraffin oil and water in the automatic drainage tank 9;

step six, discharging the water obtained in the step five through a water discharge pipe end of an automatic water discharge tank 9, enabling the discharged paraffin oil to enter an absorption tower 5, absorbing and purifying the air in the free gas through the paraffin oil, and then discharging the air to the outside under the action of a tail gas fan 8;

the free gas is a mixed free gas of air and solvent gas.

In the process from the first step to the sixth step, the drain valves at the bottom of the absorption tower 5 are opened in several times to drain the water deposited in the absorption tower 5.

Inside the water inlet 911 entering shell body 91 at lean oil follow automatic water drainage tank 9 top, lean oil is at the cavity internal rotation between shell body 91 and inner bag 92, utilize paraffin oil and water immiscible, and the water density is greater than the characteristic of paraffin oil, paraffin oil and water rotate the layering in the lean oil, paraffin oil is upper strata after the layering, it is inside to utilize the oil inlet 921 at inner bag top to get into the inner bag, then enter into absorption tower 5, water is at the lower floor after the layering, discharge from the negative pressure three-way pipe 93 of shell body 91 bottom, for the little negative pressure of guarantee absorption tower 5, paraffin oil increases U type pipeline 10 on entering the pipeline of absorption tower 5 from automatic water drainage tank 9, prevent that the air from getting into absorption tower 5 through negative pressure three-way pipe 93.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. 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, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.