CN218107281U

CN218107281U - Desulfurization system

Info

Publication number: CN218107281U
Application number: CN202221406810.3U
Authority: CN
Inventors: 肖万平; 董四禄; 秦赢; 高飞; 石蕾
Original assignee: China ENFI Engineering Corp
Current assignee: China ENFI Engineering Corp
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-12-23
Anticipated expiration: 2032-06-07

Abstract

The utility model discloses a desulfurization system, desulfurization system includes enrichment facility and desulphurization unit, enrichment facility have first hybrid chamber and with first flue gas inlet, first exhanst gas outlet, first import and the first export of first hybrid chamber intercommunication, first import is established first export top, desulphurization unit have the second hybrid chamber and with second flue gas inlet, second exhanst gas outlet, hydrogen peroxide solution import and the second export of second hybrid chamber intercommunication, second flue gas inlet with first exhanst gas outlet intercommunication, the second export with first import intercommunication, the hydrogen peroxide solution import is established second export top. The utility model discloses desulfurization system has simple structure, energy consumption low and advantage such as with low costs.

Description

Desulfurization system

Technical Field

The utility model relates to a desulfurization technical field, concretely relates to desulfurization system.

Background

At present, the sulfur-containing tail gas treatment mainly comprises an ammonia method, an organic amine method, a sodium-alkali method, an active coke method, a zinc oxide method, a hydrogen peroxide method and the like. The hydrogen peroxide method is one of the wet desulphurization methods developed in recent years, and has the advantages of high desulphurization efficiency, short flow, relatively low investment and the like. In the related art, in the process of desulfurization by using a hydrogen peroxide method, the desulfurization system has the problems of complex structure, high energy consumption and the like.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving one of the technical problems in the related art at least to a certain extent.

Therefore, the embodiment of the utility model provides a desulfurization system, this desulfurization system's simple structure, power consumption are low.

The utility model discloses desulfurization system of embodiment includes:

the concentration device is provided with a first mixing cavity, a first flue gas inlet, a first flue gas outlet, a first inlet and a first outlet, wherein the first flue gas inlet, the first flue gas outlet, the first inlet and the first outlet are communicated with the first mixing cavity;

desulphurization unit, desulphurization unit have the second mixing chamber and with second flue gas inlet, second exhanst gas outlet, hydrogen peroxide solution import and the second export of second mixing chamber intercommunication, the second flue gas inlet with first exhanst gas outlet intercommunication, the second export with first import intercommunication, the hydrogen peroxide solution import is established second export top.

The utility model discloses desulfurization system has simple structure, energy consumption low and advantage such as with low costs.

In some embodiments, the first flue gas inlet is disposed above the first inlet, the first inlet is disposed above the first flue gas outlet, and the first flue gas outlet is disposed above the first outlet.

In some embodiments, the concentration device comprises:

a first housing defining the first mixing chamber; and

the cover body is arranged in the first mixing cavity and covers the first smoke outlet.

In some embodiments, the housing has an inlet end and an outlet end, the inlet end is located in the first mixing chamber, the outlet end is connected to the first outlet, and the inlet end is inclined from bottom to top in a direction away from the first outlet.

In some embodiments, the plane of the inlet end and the plane of the outlet end form an angle β; and/or

The upper end of the inlet end is lower than the upper end of the outlet end.

In some embodiments, the first housing includes a first portion and a second portion connected to each other, the first portion is disposed on an upper side of the second portion, the second portion is gradually reduced in size from top to bottom in a horizontal direction, and the first outlet is disposed at a bottom of the second portion.

In some embodiments, the second portion is conical and the second portion has a cone angle α of 60 degrees to 120 degrees.

In some embodiments, the desulfurization system further comprises a spray device disposed within the first mixing chamber, the spray device comprising a spray conduit in communication with the first inlet and a spray head having a conduit outlet, the spray head disposed on the conduit outlet.

In some embodiments, the desulfurization system further comprises a three-way valve having a first port, a second port, and a third port, the first port and the second port each being in communication with the third port, the first port being in communication with the second outlet, the second port being in communication with the hydrogen peroxide solution inlet, and the third port being in communication with the first inlet.

In some embodiments, the desulfurization device further includes a second inlet communicated with the second mixing chamber, the hydrogen peroxide inlet is disposed between the second port and the second inlet, and the hydrogen peroxide inlet is communicated with the second inlet and the second port.

Drawings

Fig. 1 is a schematic diagram of a desulfurization system according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a concentration device of a desulfurization system according to an embodiment of the present invention.

Reference numerals:

a desulfurization system 100;

a concentration device 1; a first housing 11; a first portion 111; a second portion 112; a first flue gas inlet 12; a first flue gas outlet 13; a first inlet 14; a first outlet 15; a spray device 16; a spray line 161; a spray head 162; a cover body 17; an inlet end 171; an outlet end 172; a fixed seat 18;

a desulfurizer 2; a second flue gas inlet 21; a second flue gas outlet 22; a hydrogen peroxide inlet 23; a second outlet 24; a second inlet 25;

a concentration pump 3; a three-way valve 4; a first port 41; a second port 42; a third port 43; and a liquid seal device 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As will be understood by those skilled in the art, the sulfuric acid aqueous solution having a mass fraction of 70% or more is referred to as concentrated sulfuric acid in the industry, and the concentrated sulfuric acid described in the embodiments of the present invention does not refer to the sulfuric acid aqueous solution having a mass fraction of 70% or more. In the embodiment of the present invention, since the sulfuric acid concentration in the desulfurization device 2 is smaller than the sulfuric acid concentration in the concentration device 1, for convenience of description, the sulfuric acid generated in the desulfurization device 2 is called dilute sulfuric acid, and the sulfuric acid concentrated in the concentration device 1 is called concentrated sulfuric acid.

The utility model discloses desulfurization system 100 includes enrichment facility 1 and desulphurization unit 2, and enrichment facility 1 has first hybrid chamber and with first flue gas inlet 12, first exhanst gas outlet 13, first import 14 and the first export 15 of first hybrid chamber intercommunication, first import 14 is established in first export 15 top.

The desulfurization device 2 is provided with a second mixing cavity, a second flue gas inlet 21, a second flue gas outlet 22, a hydrogen peroxide inlet 23 and a second outlet 24, wherein the second flue gas inlet 21 is communicated with the first flue gas outlet 13, the second outlet 24 is communicated with the first inlet 14, and the hydrogen peroxide inlet 23 is arranged above the second outlet 24.

For convenience of description of the technical solution of the present application, the up-down direction in fig. 1 is taken as the extending direction of the concentration device 1, and the concentration device 1 and the desulfurization device 2 are arranged along the left-right direction, and the technical solution of the present application is further described below.

For example, as shown in fig. 1, the concentration device 1 is disposed on the left side of the desulfurization device 2, a first mixing chamber is disposed in the concentration device 1, the first flue gas inlet 12 is used for allowing flue gas to enter the first mixing chamber, and the first flue gas outlet 13 is used for allowing flue gas in the first mixing chamber to flow out.

Desulphurization unit 2 is located enrichment facility 1's right side, has the second hybrid chamber in desulphurization unit 2, and second flue gas import 21 is used for supplying the flue gas to get into the second hybrid chamber, and second exhanst gas outlet 22 is used for supplying the flue gas outflow in the second hybrid chamber, and hydrogen peroxide solution import 23 can be with second hybrid chamber intercommunication and be arranged in spraying hydrogen peroxide solution to the second hybrid chamber.

The utility model discloses desulfurization system 100 is at the during operation, and the flue gas is at first from first gas inlet 12 entering enrichment facility 1, then in getting into desulphurization unit 2 through first gas outlet 13, second gas inlet 21 in proper order, flows out through second gas outlet 22 at last. In the desulfurization device 2, the flue gas is mixed with the hydrogen peroxide solution sprayed from the hydrogen peroxide inlet 23, sulfur dioxide in the flue gas and the hydrogen peroxide undergo a chemical reaction to generate dilute sulfuric acid, and a small amount of hydrogen peroxide still exists in the dilute sulfuric acid. The dilute sulfuric acid in the second mixing cavity sequentially enters the concentration device 1 through the second outlet 24 and the first inlet 14, the concentration device 1 is located at the upstream of the desulfurization device 2, at the moment, the dilute sulfuric acid and the flue gas in the concentration device 1 further undergo a chemical reaction, because the temperature of the flue gas in the concentration device 1 is higher than that of the flue gas in the desulfurization device 2, no heat source is needed for heating in the process, sulfur dioxide in the flue gas and hydrogen peroxide remaining in the dilute sulfuric acid undergo a chemical reaction to generate sulfuric acid, and the flue gas can evaporate part of water in the dilute sulfuric acid, so that the concentration of the dilute sulfuric acid is improved to generate concentrated sulfuric acid, and the concentrated sulfuric acid finally flows out of the first outlet 15 for collection by operating personnel.

It will be appreciated that in the concentration device 1, the first flue gas inlet 12 may be arranged above the first flue gas outlet 13, when the flue gas flows from top to bottom in the concentration device 1; or the first flue gas inlet 12 is arranged below the first flue gas outlet 13, in which case the flue gas flows from bottom to top in the concentration device 1. No matter which flow mode is adopted by the flue gas, the flue gas can react with the dilute sulfuric acid. In the desulfurization device, the second flue gas inlet 21 is arranged below the second flue gas outlet 22, so that the flue gas flows from bottom to top, the hydrogen peroxide inlet 23 is arranged above the desulfurization device 2, the hydrogen peroxide solution flows from top to bottom, and the flue gas meets the hydrogen peroxide flowing downwards in the upward flowing process, so that chemical reaction occurs.

It should be noted that the flue gas temperature in the desulfurization system 100 according to the embodiment of the present invention is 40 to 100 degrees. The desulfurization system 100 of the embodiment of the present invention can be operated under positive pressure or negative pressure.

In the related art, dilute sulfuric acid is mainly used for concentrating waste acid (dilute sulfuric acid) through heating of a heat exchanger, negative pressure operation, electrodialysis and the like.

The utility model discloses desulfurization system 100 sets up enrichment facility 1 in 2 upper reaches of desulfurization device, at first react the flue gas with in hydrogen peroxide solution and desulfurization device 2 and generate dilute sulfuric acid, then react the flue gas with in the enrichment facility 1 and generate concentrated sulfuric acid, at the concentrated in-process of dilute sulfuric acid, utilize the heat of flue gas self can concentrated sulfuric acid, do not need the external world to provide the heat source, the energy consumption has been reduced on the one hand, on the other hand has saved heat source equipment, thereby desulfurization system 100's structure has been simplified, and then the cost is reduced. In addition, the concentration device 1 is arranged at the upstream of the desulfurization device 2, and the used flue gas can flow into the desulfurization device 2 and subsequent processes when the sulfuric acid is concentrated, so that redundant processes for waste gas generated in the sulfuric acid concentration process are not required, the sulfuric acid concentration cost is favorably reduced, and the subsequent processes are not influenced.

Therefore, the desulfurization system 100 of the embodiment of the present invention has the advantages of simple structure, low energy consumption, low cost, etc.

In some embodiments, the first flue gas inlet 12 is disposed above the first inlet 14, the first inlet 14 is disposed above the first flue gas outlet 13, and the first flue gas outlet 13 is disposed above the first outlet 15. Thereby, the flue gas enters from the upper first flue gas inlet 12 and then flows out from the lower first flue gas outlet 13, and the dilute sulfuric acid enters from the upper first inlet 14 and then flows out from the lower first outlet 15. The flue gas is mixed with dilute sulfuric acid and then reacts in the flowing process from top to bottom, so that the concentration of the dilute sulfuric acid is improved.

It will be appreciated that, due to the flow velocity of the flue gas in the flue, the flue gas entering the concentration device 1 from the first flue gas inlet 12 does not accumulate in the concentration device 1.

In some embodiments, the concentration device 1 comprises a first housing 11 and a hood 17, the first housing 11 defining a first mixing chamber, the hood 17 being provided in the first mixing chamber, the hood 17 being provided over the first flue gas outlet 13.

For example, as shown in fig. 2, the enclosure 17 is located in the first mixing chamber and is fixed at the first flue gas outlet 13. Therefore, the desulfurization system 100 of the embodiment of the present invention utilizes the cover body 17, when the flue gas in the concentration device 1 reacts with the dilute sulfuric acid, the dilute sulfuric acid and the generated concentrated sulfuric acid can be prevented from falling into the first flue gas outlet 13.

Optionally, the material of the first housing 11 is glass fiber reinforced plastics or a material with similar functions, such as steel-lined teflon, PVC, alloys resistant to corrosion by dilute sulfuric acid, etc.

In some embodiments, the housing 17 has an inlet end 171 and an outlet end 172, the inlet end 171 is located in the first mixing chamber, the outlet end 172 is connected to the first outlet 15, and the inlet end 171 is inclined from bottom to top in a direction away from the first outlet 15.

For example, as shown in fig. 2, the left end of the housing 17 is an inlet end 171, the right end of the housing 17 is an outlet end 172, the inlet end 171 of the housing 17 is disposed in the first mixing chamber, and the outlet end 172 of the housing 17 is connected to the first outlet 15. Therefore, the inlet end 171 of the cover 17 is inclined toward the lower left, which not only facilitates the outflow of the flue gas from the first flue gas outlet 13, but also prevents the sulfuric acid from dripping into the first flue gas outlet 13.

Optionally, the cover 17 is welded or removably attached to the first outlet 15.

In some embodiments, the plane of the inlet end 171 is at an angle β to the plane of the outlet end 172. For example, β is 10 degrees to 30 degrees, e.g., β is 10 degrees, 20 degrees, and 30 degrees.

In some embodiments, the upper end of the inlet end 171 is disposed below the upper end of the outlet end 172. From this, the top of the cover body 17 can be set up to curved surface or the high inclined plane in the low right side in a left side, when concentrated sulfuric acid drips on the cover body 17, can avoid concentrated sulfuric acid to pile up at the cover body 17 top along curved surface or inclined plane landing to be convenient for concentrated sulfuric acid flow to first export 15.

In some embodiments, the first housing 11 includes a first portion 111 and a second portion 112 connected, the first portion 111 is disposed on an upper side of the second portion 112, the second portion 112 has a size in a horizontal direction gradually decreasing from top to bottom, and the first outlet 15 is disposed at a bottom of the second portion 112. For example, as shown in fig. 2, the dilute sulfuric acid concentration reaction mainly occurs in the first section 111, and the second section 112 serves to collect the concentrated sulfuric acid generated in the first section 111 to collect the concentrated sulfuric acid.

In some embodiments, the second portion 112 is conical and the second portion 112 has a conical angle α of 60 degrees to 120 degrees. For example, as shown in FIG. 2, the second portion 112 is an inverted conical shape, thereby facilitating processing and fabrication on the one hand, and sulfuric acid flow on the other hand.

Alternatively, the taper angle α of the second portion 112 is 60 degrees, 100 degrees, 120 degrees, etc.

Optionally, the first portion 111 is cylindrical.

Alternatively, the first portion 111 and the second portion 112 are connected by welding, or the first portion 111 and the second portion 112 are detachably connected.

In some embodiments, desulfurization system 100 further includes a spray device 16, spray device 16 disposed within the first mixing chamber, spray device 16 including a spray conduit 161 and a spray head 162, spray conduit 161 in communication with first inlet 14, spray conduit 161 having a conduit outlet, spray head 162 disposed on the conduit outlet.

For example, as shown in fig. 2, the spraying device 16 is installed in the concentration device 1, one end of the spraying pipe 161 is hermetically connected to the first inlet 14, and the dilute sulfuric acid flowing from the first inlet 14 passes through the spraying device 16 and then becomes small droplets, so that the contact area with the flue gas is increased, the flue gas and the dilute sulfuric acid are conveniently contacted, and the concentration effect of the dilute sulfuric acid is further improved.

Alternatively, a plurality of spray heads 162 are arranged at intervals along the extending direction of the spray pipe 161, for example, 2, 5, 8, etc. spray heads 162 are provided.

Optionally, the shower pipe 161 and the shower head 162 are detachably connected, thereby facilitating replacement of the shower head 162.

It should be noted that the spray line 161 is arranged in a horizontal direction to ensure that the dilute sulfuric acid can be uniformly sprayed in the first mixing chamber.

In other embodiments, a fixing seat 18 is disposed at the first inlet 14, the spraying pipe 161 is sleeved in the fixing seat 18, and the spraying pipe 161 is detachably connected to the fixing seat 18. Thus, when the nozzle 162 is damaged or blocked, the shower pipe 161 can be easily removed from the holder 18, thereby facilitating maintenance.

Optionally, the holder 18 is a flange holder.

Optionally, a sealing ring is disposed between the spray pipe 161 and the fixing seat 18.

In some embodiments, the desulfurization system 100 further includes a three-way valve 4, the three-way valve 4 having a first port 41, a second port 42, and a third port 43, the first port 41 and the second port 42 each being in communication with the third port 43, the first port 41 being in communication with the second outlet 24, the second port 42 being in communication with the hydrogen peroxide solution inlet 23, and the third port 43 being in communication with the first inlet 14.

For example, as shown in fig. 1, dilute sulfuric acid flowing out of the second outlet 24 enters the three-way valve 4 through the first port 41, the dilute sulfuric acid is divided into two parts in the three-way valve 4, wherein a large part of the dilute sulfuric acid enters the hydrogen peroxide inlet 23 through the second port 42, is mixed with the hydrogen peroxide and then enters the second mixing chamber again, and another small part of the dilute sulfuric acid enters the spraying device 16 through the third port 43 and the first inlet 14 in sequence, and then enters the first mixing chamber to participate in the subsequent reaction.

Optionally, the desulfurization system 100 further includes a concentration pump 3, one end of the concentration pump 3 is communicated with the second outlet 24, and the other end of the concentration pump 3 is communicated with the first port 41.

In some embodiments, the desulfurization device 2 further includes a second inlet 25 communicated with the second mixing chamber, the hydrogen peroxide inlet 23 is disposed between the second port 42 and the second inlet 25, and the hydrogen peroxide inlet 23 is communicated with the second inlet 25 and the second port 42. From this, hydrogen peroxide solution import 23 is established between second mouth 42 and second import 25, and the dilute sulphuric acid that flows out from second mouth 42 can get into the second mixing chamber from second import 25 again after with hydrogen peroxide solution misce bene, and from this, the dilute sulphuric acid of being convenient for and hydrogen peroxide solution fully mix with the flue gas to improve desulfurization effect.

It should be noted that the flow direction of the liquid in the second port 42 and the second inlet 25 is unidirectional, and the hydrogen peroxide solution entering from the hydrogen peroxide solution inlet 23 does not flow into the second port 42.

Optionally, the desulfurization system 100 further comprises a liquid seal device 5, and the liquid seal device 5 is communicated with the first outlet 15, so that the concentrated sulfuric acid flowing out of the first outlet 15 is sealed in the liquid seal device 5, thereby preventing the flue gas from flowing out of the first outlet 15.

As shown in fig. 1, the concentration pump 3, the three-way valve 4, the desulfurization device 2, the concentration device 1, and the liquid seal device 5 are communicated with each other through a line, and the line in fig. 1 is indicated by a line. Wherein the direction of the arrows on the lines indicate the direction of flow of the fluid in the pipeline.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless expressly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A desulfurization system, comprising:

2. The desulfurization system of claim 1, wherein said first flue gas inlet is disposed above said first inlet, said first inlet is disposed above said first flue gas outlet, and said first flue gas outlet is disposed above said first outlet.

3. The desulfurization system of claim 2, wherein the concentration device comprises:

a first housing defining the first mixing chamber; and

the cover body is arranged in the first mixing cavity and covers the first flue gas outlet.

4. The desulfurization system of claim 3, wherein said housing has an inlet end and an outlet end, said inlet end being positioned within said first mixing chamber, said outlet end being connected to said first outlet, said inlet end being inclined from bottom to top in a direction away from said first outlet.

5. The desulfurization system of claim 4, wherein the angle between the plane of the inlet end and the plane of the outlet end is β; and/or

The upper end of the inlet end is lower than the upper end of the outlet end.

6. The desulfurization system according to any one of claims 3 to 5, wherein said first casing comprises a first portion and a second portion connected, said first portion being provided on an upper side of said second portion, said second portion being gradually reduced in size from top to bottom in a horizontal direction, and said first outlet being provided at a bottom of said second portion.

7. The desulfurization system of claim 6, wherein said second section is conical, and wherein the conical angle a of said second section is in the range of 60 degrees to 120 degrees.

8. The desulfurization system of any one of claims 1-5, further comprising a spray device disposed within the first mixing chamber, the spray device comprising a spray conduit in communication with the first inlet, the spray conduit having a conduit outlet, and a spray head disposed on the conduit outlet.

9. The desulfurization system of any one of claims 1-5, further comprising a three-way valve having a first port, a second port, and a third port, the first port and the second port each being in communication with the third port, the first port being in communication with the second outlet, the second port being in communication with the hydrogen peroxide solution inlet, and the third port being in communication with the first inlet.

10. The desulfurization system of claim 9, wherein said desulfurization device further comprises a second inlet in communication with said second mixing chamber, said hydrogen peroxide inlet is disposed between said second port and said second inlet, and said hydrogen peroxide inlet is in communication with said second inlet and said second port.