CN215388696U - Semi-open loop seawater desulfurization treatment device - Google Patents

Abstract

The application relates to a semi-open loop seawater desulfurization treatment device, and relates to the field of desulfurization treatment. The semi-open loop seawater desulfurization treatment device comprises a desulfurization tower; the desulfurizing agent providing device comprises a seawater providing unit, an alkali liquor providing unit, a first flow valve and a second flow valve, wherein the seawater providing unit is used for providing seawater for the desulfurizing tower, the alkali liquor providing unit is used for providing alkaline solution for the desulfurizing tower, the desulfurizing agent providing device is used for providing desulfurizing agent for the desulfurizing tower, and the desulfurizing agent is seawater and/or alkaline solution; the pH meter is used for detecting the pH value of the desulfurizer discharged from the desulfurizing tower; the first flow valve and the second flow valve are both electrically connected with the pH value meter, the first flow valve is used for adjusting the flow of the seawater supply unit, and the second flow valve is used for adjusting the flow of the alkali liquor supply unit. The semi-open loop seawater desulfurization treatment device has higher desulfurization efficiency and economical efficiency.

Description

Semi-open loop seawater desulfurization treatment device

Technical Field

The application relates to the field of desulfurization treatment, in particular to a semi-open loop seawater desulfurization treatment device.

Background

Fossil fuels generally contain sulfur elements, and flue gas generated by burning the fossil fuels contains a large amount of sulfur dioxide, which is one of main atmospheric pollutants and needs to be subjected to desulfurization treatment.

In the prior art, an alkaline solution or seawater is generally used for carrying out desulfurization treatment on sulfur-containing flue gas, and how to improve the desulfurization efficiency and the economic efficiency is of great importance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a semi-open loop sea water desulfurization treatment device, this semi-open loop sea water desulfurization treatment device has higher desulfurization efficiency and better economic nature.

The application provides a semi-open loop seawater desulfurization treatment device, which comprises a desulfurization tower; the desulfurizing agent providing device comprises a seawater providing unit, an alkali liquor providing unit, a first flow valve and a second flow valve, wherein the seawater providing unit is used for providing seawater for the desulfurizing tower, the alkali liquor providing unit is used for providing alkaline solution for the desulfurizing tower, the desulfurizing agent providing device is used for providing desulfurizing agent for the desulfurizing tower, and the desulfurizing agent is seawater and/or alkaline solution; the pH meter is used for detecting the pH value of the desulfurizer discharged from the desulfurizing tower; the first flow valve and the second flow valve are both electrically connected with the pH value meter, the first flow valve is used for adjusting the flow of the seawater supply unit, and the second flow valve is used for adjusting the flow of the alkali liquor supply unit.

The utility model provides a semi-open ring sea water desulfurization processing apparatus, desulfurizer provide the device and are used for providing the desulfurizer and carry out the desulfurization to containing the flue gas, and the desulfurizer provides the device and provides the unit including sea water, and the sea water provides the unit and is used for providing the sea water, and alkali lye provides the unit and is used for providing alkaline solution. The desulfurizer providing device can provide seawater as a desulfurizer, can also provide alkaline solution as a desulfurizer, and can also provide seawater and alkaline solution as the desulfurizer at the same time. Simultaneously, this semi-open ring sea water desulfurization processing apparatus sets up the pH valve of the desulfurizer after the pH meter detects desulfurization to can adjust the proportion of sea water and alkaline solution in the desulfurizer according to the result that detects, with can be directed against the different concentrations of sulfur dioxide in the sulphur flue gas, spray the desulfurizer of different proportions, improve desulfurization efficiency and economic nature.

In some embodiments of the present application, the semi-open loop seawater desulfurization treatment device further includes a main pipeline, the outlet of the seawater supply unit and the outlet of the alkali liquor supply unit are both communicated with the main pipeline, and the outlet end of the main pipeline is communicated with the desulfurization tower.

In the above scheme, this kind of mode of setting, through setting up the main line, can mix sea water and alkaline solution outside the desulfurizing tower promptly, guaranteed that the desulfurizer after mixing in the main line can comparatively even entering desulfurizing tower, the desulfurization effect of the different positions in the desulfurizing tower is unanimous, can not appear the inhomogeneous problem of sulfur-containing flue gas desulfurization.

In some embodiments of the present application, the main pipeline is provided with at least one branch pipeline, the branch pipeline is communicated with the main pipeline, and an outlet of the branch pipeline is used for spraying a desulfurizing agent.

In the above scheme, this kind of mode of setting, the branch pipeline is used for connecting main line and desulfurizing tower, and the branch pipeline can set up to a plurality ofly, and when the branch pipeline set up a plurality ofly, the desulfurizing tower has a plurality of liquid inlets, and the desulfurizing tower has a plurality of desulfurizer entries promptly, can spray the desulfurizer from the position of difference, has improved effect and the homogeneity of carrying out desulfurization treatment to containing sulphur flue gas.

In some embodiments of the present application, the lower end of the desulfurization tower is provided with a quench pipe for the introduction of the sulfur-containing flue gas, and the at least one branch pipe is configured to spray the desulfurizing agent into the quench pipe.

In above-mentioned scheme, this kind of mode of setting, the gas inlet of quench pipe conduct desulfurizing tower, when the sulphur flue gas gets into the quench pipe, has not carried out any desulfurization treatment yet, and the sulfur dioxide concentration of the sulphur flue gas that contains in the quench pipe is big promptly, consequently sets up the branch pipeline in the quench pipe to spray the sulfur dioxide that the desulfurizer can be in the absorption sulphur flue gas of great degree in the quench pipe, it is better to the desulfurization treatment effect of sulphur flue gas.

In some embodiments of the present application, the inner space of the desulfurization tower is provided with a plurality of packing layers, the plurality of packing layers are arranged at intervals along the height direction of the desulfurization tower, and the packing layers are used for increasing the contact area and the contact time of the sulfur-containing flue gas and the desulfurizing agent.

In the above scheme, the setting of packing layer has increased area of contact and the contact time of desulfurizer with contain the sulphur flue gas, on the one hand, has increased the desulfurizer and has carried out the desulfurization homogeneity to containing the sulphur flue gas, and on the other hand, the desulfurizer can be abundant absorb the sulfur dioxide in containing the sulphur flue gas, and is effectual to containing the desulfurization of sulphur flue gas.

In some embodiments of the present application, the semi-open ring seawater desulfurization treatment device further comprises a desulfurizer circulation device, an inlet of the desulfurizer circulation device is communicated with the liquid outlet at the lower end of the desulfurization tower, an outlet of the desulfurizer circulation device is communicated with the outlet of the desulfurizer supply device, and the desulfurizer circulation device is used for conveying the desulfurizer discharged from the desulfurization tower to the desulfurization tower again.

In the scheme, the desulfurizer discharged from the desulfurizing tower is conveyed to the desulfurizing tower again through the desulfurizer circulating device to react with sulfur dioxide in sulfur-containing flue gas, so that the utilization rate of the desulfurizer is improved, the waste is reduced, and the pollution to the environment caused by directly discharging the desulfurizer is avoided.

In some embodiments of the present application, the semi-open loop seawater desulfurization treatment apparatus further comprises a seawater recovery tank, and the desulfurizing agent circulation device is configured to re-convey a part of the desulfurizing agent discharged from the desulfurization tower to the desulfurization tower, and to convey another part of the desulfurizing agent discharged from the desulfurization tower to the seawater recovery tank.

In the scheme, the seawater recovery tank is used for carrying out post-treatment on the desulfurizer, so that the pollution to the environment caused by direct discharge of the desulfurizer is avoided.

In some embodiments of the present application, the semi-open loop seawater desulfurization treatment apparatus further comprises an aeration apparatus for delivering air into the seawater recovery pond.

In the scheme, air is introduced into the liquid in the seawater recovery tank to oxidize the liquid, sulfite ions in the desulfurizer are converted into sulfate ions, and the pollution to the environment is reduced.

In some embodiments of the present application, the semi-open loop seawater desulfurization treatment apparatus further comprises a demister disposed at a gas opening at an upper end of the desulfurization tower.

In the above scheme, this kind of mode of setting, the vapor in the purification flue gas passes through the defroster, condenses to the inner wall that adheres to the desulfurizing tower behind the water droplet, and the water droplet can be followed the inner wall of desulfurizing tower and converged in the bottom of desulfurizing tower, mixes the back with the desulfurizer, together discharges through the liquid outlet of the lower extreme of desulfurizing tower, and can not gather in the desulfurizing tower.

In some embodiments of this application, the semi-open loop sea water desulfurization processing apparatus still includes the thermosiphon heat exchanger, and the thermosiphon heat exchanger includes evaporimeter and condenser, and the gas inlet and the evaporimeter intercommunication of the lower extreme of desulfurizing tower, the gas outlet and the condenser intercommunication of the upper end of desulfurizing tower contain the sulphur flue gas and get into the desulfurizing tower after the evaporimeter cooling, purify the flue gas and discharge after the condenser intensifies.

In the above scheme, set up the thermosiphon heat exchanger, utilize and contain the sulphur flue gas and heat the purification flue gas, utilize the purification flue gas to cool down to containing the sulphur flue gas, carry out the heat transfer through containing the sulphur flue gas and purification flue gas, need not to add extra part and need not to consume the energy and realize above-mentioned effect promptly, reduced this half-open ring sea water desulfurization treatment device's spare part quantity, and friendly to the environment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required 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 application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic view of a semi-open loop seawater desulfurization treatment apparatus according to an embodiment of the present application.

Icon: 1-a semi-open loop seawater desulfurization treatment device; 10-a desulfurization tower; 20 a desulfurizing agent supply device; 21-a seawater supply unit; 211-seawater tank; 212-first pump body; 22-a lye supply unit; 221-lye tanks; 222-a second pump body; 23-a first flow valve; 24-a second flow valve; 30-acid-base meter; 40-a main pipeline; 41-branch pipeline; 42-quench tube; 43-a spray head; 50-a filler layer; 60-a desulfurizer circulating device; 61-a third pump body; 71-a seawater recovery pond; 72-an aeration device; 80-a thermosiphon heat exchanger; 81-an evaporator; 82-condenser.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

With the development of the industrialization process, fossil fuels (coal, petroleum, natural gas) are increasingly demanded as main raw materials and energy sources in the industrial fields of chemical industry, metallurgy, manufacturing and the like. As the fossil fuel generally contains sulfur element, the flue gas generated by burning the fossil fuel contains a large amount of sulfur dioxide. Sulfur dioxide is one of the main pollutants in the atmosphere, sulfur-containing flue gas containing sulfur dioxide is directly discharged into the air, sulfur dioxide is dissolved in water to form sulfurous acid, sulfurous acid is continuously oxidized to form sulfuric acid, acid rain is formed, the environment is polluted, and the influence on agriculture, building industry and the like can be generated.

Therefore, the sulfur-containing flue gas containing sulfur dioxide generated by coal-fired boilers, oil-fired boilers, metallurgical byproduct waste gas, chemical waste gas, cement, glass kilns and the like needs to be desulfurized so as to avoid the pollution to the environment caused by directly discharging the sulfur-containing flue gas.

Since sulfur dioxide is acidic, an alkaline solution, such as a sodium hydroxide solution, a magnesium hydroxide solution, a calcium hydroxide solution, or the like, is generally used as a desulfurizing agent for removing sulfur dioxide. Because the sulfur-containing flue gas also contains a large amount of carbon dioxide, when the sulfur-containing flue gas is directly desulfurized by using the alkaline solution, the alkaline solution is consumed by the carbon dioxide, the consumption of the alkaline solution is increased, and the cost is higher.

The pH value (acidity and alkalinity) of the seawater is generally in the range of 8-8.2, the seawater is weakly alkaline, and the seawater contains a large amount of weak acid radical anions, such as carbonate, bicarbonate and the like, which can be used as acceptors of hydrogen ions, namely the seawater has natural acidity and alkalinity buffering capacity and the capacity of absorbing acid gas. Meanwhile, most of sulfur elements in the nature exist in the sea in the form of sulfate, the sulfate is one of main components of the seawater, most of sulfur dioxide in the environment finally returns to the seawater in the form of sulfate, and the seawater is used as a desulfurizing agent of the sulfur dioxide, so that the marine environment is not polluted. Therefore, seawater is an excellent desulfurizing agent for desulfurizing sulfur-containing flue gas in coastal areas.

However, since the alkalinity of the seawater is weak, the desulfurization treatment of the sulfur-containing flue gas by simply using the seawater is low in efficiency, the consumption of the seawater is large, and a large amount of energy is consumed to pump the seawater.

In view of this, the present application provides a semi-open ring seawater desulfurization treatment device, which includes a desulfurizer providing device, the desulfurizer providing device is used for providing a desulfurizer to desulfurize sulfur-containing flue gas, the desulfurizer providing device includes a seawater providing unit and an alkali liquor providing unit, the seawater providing unit is used for providing seawater, the alkali liquor providing unit is used for providing an alkaline solution, that is, the desulfurizer provided by the desulfurizer providing device is seawater and/or an alkaline solution. It can be understood that the desulfurizing agent providing apparatus can provide seawater as the desulfurizing agent alone, can also provide alkaline solution as the desulfurizing agent alone, and can also provide seawater and alkaline solution as the desulfurizing agent simultaneously. Meanwhile, the semi-open-loop seawater desulfurization treatment device is provided with an acid-base meter for detecting the pH value of the desulfurization agent (seawater and/or alkaline solution) after desulfurization treatment, and the proportion of the seawater and the alkaline solution in the desulfurization agent is adjusted according to the detection result (the proportion of one of the seawater and the alkaline solution can be 0).

The semi-open loop seawater desulfurization treatment apparatus of the present application will be described below with reference to the accompanying drawings.

In one aspect, as shown in fig. 1, the present application provides a semi-open loop seawater desulfurization treatment apparatus 1, where the semi-open loop seawater desulfurization treatment apparatus 1 includes a desulfurization tower 10, a desulfurizing agent supply device, and a ph meter 30.

As shown in fig. 1, the desulfurizing agent supply device includes a seawater supply unit 21, an alkali solution supply unit 22, a first flow valve 23 and a second flow valve 24, the seawater supply unit 21 is used for supplying seawater to the desulfurizing tower 10, the alkali solution supply unit 22 is used for supplying alkaline solution to the desulfurizing tower 10, and the desulfurizing agent supply device is used for supplying desulfurizing agent to the desulfurizing tower 10, the desulfurizing agent is seawater and/or alkaline solution, that is, the desulfurizing agent may be only seawater, only alkaline solution, or a mixed liquid of seawater and alkaline solution. The pH meter 30 is used for detecting the pH value of the desulfurizer discharged from the desulfurization tower 10, that is, the pH value of the desulfurizer collected to the bottom of the desulfurization tower 10 after the sulfur-containing flue gas is desulfurized. The first flow valve 23 and the second flow valve 24 are electrically connected to the ph meter 30, the first flow valve 23 is used for adjusting the flow rate of the seawater supply unit 21, and the second flow valve 24 is used for adjusting the flow rate of the lye supply unit 22.

The utility model provides a semi-open ring sea water desulfurization processing apparatus 1, desulfurizer provide the device and are used for providing the desulfurizer to desulfurization to containing the sulphur flue gas, and the desulfurizer provides the device and includes that sea water provides unit 21 and alkali lye provides unit 22, and sea water provides unit 21 and is used for providing the sea water, and alkali lye provides unit 22 and is used for providing alkaline solution, and the desulfurizer that the desulfurizer provided promptly provides the device is sea water and/or alkaline solution. It can be understood that the desulfurizing agent providing apparatus can provide seawater as the desulfurizing agent alone, can also provide alkaline solution as the desulfurizing agent alone, and can also provide seawater and alkaline solution as the desulfurizing agent simultaneously. Meanwhile, the semi-open loop seawater desulfurization device 1 is provided with the pH meter 30 to detect the pH value of the desulfurizing agent after desulfurization treatment, and can adjust the proportion of seawater and alkaline solution in the desulfurizing agent (one of the seawater and the alkaline solution can be 0) according to the detection result, so that the desulfurizing agents with different proportions can be sprayed according to different concentrations of sulfur dioxide in sulfur-containing flue gas, and the desulfurization efficiency and economy are improved.

The desulfurizing tower 10 extends in the vertical direction, the desulfurizing tower 10 has an inner space, the sulfur-containing flue gas enters the inner space of the desulfurizing tower 10 through a gas inlet at the lower end of the desulfurizing tower 10 and reacts with a desulfurizing agent sprayed into the desulfurizing tower 10, and the purified flue gas desulfurized by the desulfurizing agent is discharged through a gas outlet at the upper end of the desulfurizing tower 10. Further, the desulfurizer gets into the inner space of desulfurizing tower 10 from the liquid inlet of desulfurizing tower 10, the liquid inlet of desulfurizing tower 10 can set up in the middle part of desulfurizing tower 10, also can set up in the upper portion of desulfurizing tower 10, the desulfurizer that gets into through the liquid inlet of desulfurizing tower 10 sprays downwards under the effect of gravity, and react with sulphur-containing flue gas in order to carry out desulfurization treatment to sulphur-containing flue gas, afterwards, the desulfurizer collects in the lower extreme of desulfurizing tower 10 under the effect of gravity, the lower extreme of desulfurizing tower 10 is provided with the liquid outlet who supplies the desulfurizer exhaust.

The first flow valve 23 is used for adjusting the flow rate of the seawater providing unit 21, and the second flow valve 24 is used for adjusting the flow rate of the alkali liquor providing unit 22, that is, according to the detection result of the ph of the desulfurizing agent discharged from the desulfurizing tower 10 by the ph meter 30, the first flow valve 23 can adjust the flow rate of the seawater provided by the seawater providing unit 21, and the second flow valve 24 can adjust the flow rate of the alkali liquor provided by the alkali liquor providing unit 22, so that the proportion of the seawater and the alkali liquor in the desulfurizing agent is reasonably configured on the basis of satisfying the requirement of sufficient desulfurization of the sulfur-containing flue gas. For example, when the detection result of the pH meter 30 is alkaline, the opening degree of the first flow valve 23 can be appropriately increased to increase the content of the seawater in the desulfurizing agent, and the opening degree of the second flow valve 24 can be appropriately decreased to decrease the content of the alkaline solution in the desulfurizing agent, and when the detection result of the pH meter 30 is acidic, the opening degree of the first flow valve 23 can be appropriately decreased to decrease the content of the seawater in the desulfurizing agent, and the opening degree of the second flow valve 24 can be appropriately increased to increase the content of the alkaline solution in the desulfurizing agent.

It should be noted that the opening degree of the first flow valve 23 may be 0, that is, the first flow valve 23 may adjust the flow rate of the seawater provided by the seawater providing unit 21 to 0, that is, the first flow valve 23 may shut off the seawater providing unit 21, and correspondingly, the opening degree of the second flow valve 24 may be 0, that is, the first flow valve 23 may adjust the flow rate of the alkaline solution provided by the alkaline solution providing unit 22 to 0, that is, the second flow valve 24 may shut off the alkaline solution providing unit 22. It can be understood that the ratio of seawater to alkaline solution in the desulfurizing agent can be 0, that is, the desulfurizing agent can be only seawater, or only alkaline solution, or the desulfurizing agent is a mixed solution of seawater and alkaline solution. For example, when the concentration of sulfur dioxide in the sulfur-containing flue gas is low, the sulfur-containing flue gas can be sufficiently desulfurized only by using seawater, and at this time, the opening degree of the second flow valve 24 can be adjusted to 0, and only the seawater is provided as the desulfurizing agent by the seawater providing unit 21; after that, the opening degree of the second flow valve 24 is gradually increased as the amount of the sulfurous flue gas increases or the concentration of sulfur dioxide in the sulfurous flue gas increases. When the seawater cannot be used as the desulfurizing agent, the opening degree of the first flow valve 23 is adjusted to 0, and at this time, the alkaline solution is supplied as the desulfurizing agent only through the alkaline solution supply unit 22.

As shown in fig. 1, the seawater supply unit 21 includes a seawater tank 211 and a first pump body 212, the seawater tank 211 is used for storing seawater, the first pump body 212 is used for pumping the seawater in the seawater tank 211 to the desulfurization tower 10, the lye supply unit 22 includes a lye tank 221 and a second pump body 222, the lye tank 221 is used for storing alkaline solution, and the second pump body 222 is used for pumping the alkaline solution in the lye tank 221 to the desulfurization tower 10 so as to desulfurize the sulfur-containing flue gas introduced into the desulfurization tower 10 by the seawater, or the alkaline solution, or the seawater and the alkaline solution.

Since seawater and alkaline solution have certain corrosiveness, the seawater tank 211, the alkaline solution tank 221, the first pump body 212, and the second pump body 222 all need to be made of corrosion-resistant materials, such as high nickel alloy steel, high aluminum alloy, titanium alloy, tungsten alloy, etc., so as to be able to work normally under the corrosive action of seawater or alkaline environment, and have a long service life.

Further, as shown in fig. 1, in some embodiments of the present application, the semi-open loop seawater desulfurization treatment device 1 further includes a main pipeline 40, an outlet of the seawater supply unit 21 and an outlet of the alkali solution supply unit 22 are both communicated with the main pipeline 40, and an outlet end of the main pipeline 40 is communicated with the desulfurization tower 10. Meanwhile, the seawater and the alkaline solution are configured to be able to mix in the main pipeline 40, that is, when the opening degrees of the first flow valve 23 and the second flow valve 24 are not equal to 0, the first pump body 212 pumps the seawater in the seawater tank 211 to the main pipeline 40, meanwhile, the second pump body 222 pumps the alkaline solution in the alkaline solution tank 221 to the main pipeline 40, and after the seawater and the alkaline solution are mixed in the main pipeline 40, they are together conveyed to the desulfurization tower 10 to perform desulfurization treatment on the sulfur-containing flue gas.

In other embodiments of the present application, the seawater supply unit 21 may independently supply seawater to the desulfurization tower 10, and the lye supply unit 22 may also independently supply an alkaline solution to the desulfurization tower 10. At this time, even if the opening degrees of the first flow valve 23 and the second flow valve 24 are not 0, the seawater and the alkaline solution are not mixed before entering the desulfurization tower 10, that is, the seawater and the alkaline solution independently enter the desulfurization tower 10, and the sulfur-containing flue gas in the desulfurization tower 10 is desulfurized.

Further, since both the seawater and the alkaline solution have a certain corrosiveness, the main pipeline 40 needs to be made of corrosion-resistant materials, such as high nickel alloy steel, high aluminum alloy, titanium alloy, tungsten alloy, etc., so as to be able to work normally under the corrosive action of the seawater or the alkaline environment, and have a long service life.

This kind of setting mode, through setting up main line 40, can mix sea water and alkaline solution outside desulfurizing tower 10 promptly, guaranteed that the desulfurizer (the mixed liquid of sea water and alkaline solution) after mixing in main line 40 can be comparatively even gets into desulfurizing tower 10, and the desulfurization effect of the different positions in desulfurizing tower 10 is unanimous, can not appear the inhomogeneous problem of sulfur-containing flue gas desulfurization.

In some embodiments of the present application, the main pipeline 40 is provided with at least one branch pipeline 41, the branch pipeline 41 is communicated with the main pipeline 40, and an outlet of the branch pipeline 41 is used for spraying the desulfurizing agent. It can be understood that one end of the branch pipe 41 is communicated with the main pipe 40, so that the desulfurizing agent in the main pipe 40 can enter the branch pipe 41, and the other end of the branch pipe 41 can extend into the desulfurizing tower 10, or can extend into the gas inlet of the desulfurizing tower 10, and is used as the liquid inlet of the desulfurizing tower 10 for spraying the desulfurizing agent.

Specifically, as shown in fig. 1, in some embodiments of the present application, the branch pipes 41 are multiple, for example, in fig. 1, five branch pipes 41 are provided, wherein four branch pipes 41 extend into the inner space of the desulfurization tower 10, one branch pipe 41 extends into the gas inlet of the desulfurization tower 10, four branch pipes 41 extend into the desulfurization tower 10 for spraying the desulfurizing agent in the desulfurization tower 10, and the branch pipe 41 extending into the gas inlet of the desulfurization tower 10 is used for directly spraying the desulfurizing agent to the gas inlet of the desulfurization tower 10.

The number and the arrangement position of the branch pipes 41 are not limited in the present application. For example, when only one branch pipe 41 is provided, the branch pipe 41 may extend into the inner space of the desulfurization tower 10, or may extend into the gas inlet of the desulfurization tower 10, when two branch pipes 41 are provided in the desulfurization tower 10, two branch pipes 41 may extend into the inner space of the desulfurization tower 10 at the same time, or two branch pipes 41 may also extend into the gas inlet of the desulfurization tower 10 at the same time, or one of the two branch pipes 41 may extend into the inner space of the desulfurization tower 10, and the other of the two branch pipes 41 may extend into the gas inlet of the desulfurization tower 10. Optionally, when the number of the branch pipes 41 is multiple, at least one branch pipe 41 is arranged at the gas inlet of the desulfurizing tower 10, so that the sulfur-containing flue gas can be desulfurized at the position with higher concentration of sulfur dioxide in the sulfur-containing flue gas, and a better shedding effect is achieved.

Further, since both the seawater and the alkaline solution have a certain corrosiveness, the branch pipe 41 needs to be made of corrosion-resistant materials, such as high nickel alloy steel, high aluminum alloy, titanium alloy, tungsten alloy, etc., so as to be able to work normally under the corrosive action of the seawater or the alkaline environment, and have a long service life.

The branch pipeline 41 is used for connecting the main pipeline 40 and the desulfurizing tower 10, and the branch pipeline 41 can be set to a plurality of, and when the branch pipeline 41 sets up a plurality of, the desulfurizing tower 10 has a plurality of liquid inlets, and the desulfurizing tower 10 has a plurality of desulfurizer entries promptly, can spray the desulfurizer from the position of difference, has improved effect and the homogeneity of carrying out desulfurization treatment to containing sulphur flue gas.

In some embodiments of the present application, as shown in FIG. 1, a branch conduit 41 may also be provided with at least one spray head 43. The shower head 43 is provided at the outlet of the branch pipe 41 and communicates with the branch pipe 41. After the main pipeline 40 delivers the desulfurizing agent to the branch pipelines 41, the branch pipelines 41 deliver the desulfurizing agent to the spray heads 43, and spray the desulfurizing agent to the corresponding positions of the branch pipelines 41 through the spray heads 43, for example, the inner space of the desulfurizing tower 10 or the gas inlet of the desulfurizing tower 10.

Wherein, one branch pipe 41 can be provided with at least one nozzle 43, that is, one branch pipe 41 can be provided with one outlet and connected with one nozzle 43 so as to spray the desulfurizer through the nozzle 43, or one branch pipe 41 can be provided with a plurality of outlets, and each outlet is connected with one nozzle 43 so as to further achieve the effect of uniformly spraying the desulfurizer.

Further, the spray head 43 is used to increase the spray area of the desulfurizing agent. In some embodiments of the present application, the nozzle 43 may be provided with a plurality of spraying holes, and all the spraying holes can pass through the desulfurizing agent and spray the desulfurizing agent to the corresponding position and space. In other embodiments of this application, shower nozzle 43 can also set up the water conservancy diversion face, for example shower nozzle 43 can set up and be conical water conservancy diversion face, and the desulfurizer can spray to relative two directions along conical water conservancy diversion face after the water conservancy diversion of water conservancy diversion face, for example shower nozzle 43 can also be provided with curved water conservancy diversion face again to can spray the desulfurizer to all around along the arc, increased the area that the desulfurizer sprayed, improved the effect that the desulfurizer carries out desulfurization treatment to containing sulphur flue gas.

As shown in fig. 1, in some implementations of the present application, a lower end of the desulfurization tower 10 is provided with a quench pipe 42 for entering the sulfur-containing flue gas, and at least one branch pipe 41 is configured to spray a desulfurizing agent into the quench pipe 42. It is understood that the quench tube 42 is the gas inlet of the desulfurization tower 10.

The configuration of at least one branch pipe 41 for spraying the desulfurizing agent into the quenching pipe 42 means that, when the main pipe 40 is provided with only one branch pipe 41, the branch pipe 41 is provided in the quenching pipe 42 and used for spraying the desulfurizing agent into the quenching pipe 42, and when the main pipe 40 is provided with a plurality of branch pipes 41, at least one branch pipe 41 is provided in the quenching pipe 42 and used for spraying the desulfurizing agent into the quenching pipe 42. The quenching pipe 42 is as the gas inlet of desulfurizing tower 10, and when the sulphur flue gas got into quenching pipe 42, any desulfurization treatment had not been carried out yet, and the sulphur dioxide concentration of the sulphur flue gas that contains in the quenching pipe 42 is big promptly, consequently sets up branch pipeline 41 in quenching pipe 42 to spray the sulphur dioxide that the desulfurizer can be in the absorption sulphur flue gas of great degree in the quenching pipe 42, it is better to the desulfurization treatment effect of sulphur flue gas.

Further, in some embodiments of the present application, the quench tube 42 may be disposed in a horizontal direction, and in other embodiments of the present application, the quench tube 42 may also be disposed at an angle to the horizontal direction.

Meanwhile, since seawater and alkaline solution both have certain corrosiveness, and the quench pipe 42 serves as a gas inlet of the desulfurization tower 10, a large amount of sulfur-containing flue gas enters the desulfurization tower 10 through the quench pipe 42, and sulfur dioxide also has a corrosive effect, the quench pipe 42 needs to be made of corrosion-resistant materials, such as high nickel alloy steel, high aluminum alloy, titanium alloy, tungsten alloy and the like, so that the desulfurization tower can normally work under the corrosive effect of seawater or alkaline environment, and has a long service life.

As shown in fig. 1, in some embodiments of the present application, the inner space of the desulfurization tower 10 is provided with a plurality of packing layers 50, the packing layers are arranged at intervals along the height direction of the desulfurization tower, and the packing layers 50 are used for increasing the contact area and the contact time of the sulfur-containing flue gas and the desulfurizing agent.

The material of the packing layer 50 may be PP (Polypropylene), or the material of the packing layer 50 may be PVC (Polyvinyl chloride), or the material of the packing layer 50 may be stainless steel. The packing layer 50 is mainly used to increase the contact area and the contact time between the sulfur-containing flue gas and the desulfurizing agent, that is, the packing layer 50 needs to be in contact with seawater and an alkaline solution, that is, the sulfur-containing flue gas, for a long time, and the material of the packing layer 50 needs to have a certain corrosion resistance, so that the material of the packing layer 50, such as the polypropylene and the polyvinyl chloride, needs to be modified by adding an additive to improve the corrosion resistance of the packing layer 50.

The packing layer 50 may be arranged in a snowflake shape, or a honeycomb shape, or a grid shape, so as to increase the contact area and the contact time of the desulfurizing agent with the sulfur-containing flue gas. Specifically, packing layer 50 sets up to snowflake shape and indicates, and packing layer 50 has a plurality of lamellar bodies that are snowflake shape, and every lamellar body includes six branches, is provided with many pairs of fins on every branch road, has increased the area that contains the sulphur flue gas and desulfurizer can adhere to, simultaneously, when containing sulphur flue gas and absorbent contact on packing layer 50, the time of containing the sulphur flue gas and absorbent contact is longer, sulfur dioxide in the absorption sulphur flue gas that the desulfurizer can be abundant.

Further, as shown in fig. 1, when the inside of the desulfurization tower 10 is provided with a plurality of packing layers 50, the plurality of packing layers 50 can be arranged in the desulfurization tower 10 at intervals along the vertical direction, at this time, a plurality of branch pipes 41 can be arranged, and the branch pipes 41 are arranged above each packing layer 50 to spray the desulfurizing agent, so as to more fully desulfurize the sulfur-containing flue gas.

Packing layer 50's setting has increased area of contact and the contact time of desulfurizer with contain the sulphur flue gas, on the one hand, has increased the desulfurizer and has carried out desulfurated homogeneity to containing the sulphur flue gas, and on the other hand, the desulfurizer can be abundant absorb the sulfur dioxide in containing the sulphur flue gas, and is effectual to the desulfurization of containing the sulphur flue gas.

As shown in fig. 1, in some embodiments of the present application, the semi-open loop seawater desulfurization treatment device 1 further includes a desulfurizer circulation device 60, an inlet of the desulfurizer circulation device 60 is communicated with a liquid outlet at the lower end of the desulfurization tower 10, an outlet of the desulfurizer circulation device 60 is communicated with an outlet communicating pipe of the desulfurizer supply device, and the desulfurizer circulation device 60 is used for re-discharging the desulfurizer discharged from the desulfurization tower 10 and conveying the same to the desulfurization tower 10.

Specifically, as shown in fig. 1, the desulfurizer circulation device 60 includes a third pump body 61, and the third pump body 61 is configured to pump the desulfurizer discharged from the desulfurization tower 10 to the main line 40, mix the desulfurizer with the desulfurizer in the desulfurizer supply device in the main line 40, and pump the mixed desulfurizer into the desulfurization tower 10 again. In order to enable the desulfurizer to perform sufficient desulfurization on sulfur-containing flue gas, the amount of sulfur dioxide which can be absorbed by the desulfurizer generally needs to be larger than the sulfur dioxide contained in the sulfur-containing flue gas introduced into the desulfurization tower 10, namely, the sulfur dioxide in the sulfur-containing flue gas can still be absorbed by the desulfurizer discharged from the desulfurization tower 10, in order to reduce waste, the desulfurizer discharged from the desulfurization tower 10 is conveyed to the desulfurization tower 10 again through the desulfurizer circulating device 60 to react with the sulfur dioxide in the sulfur-containing flue gas, the utilization rate of the desulfurizer is improved, and the environment pollution caused by directly discharging the desulfurizer is avoided.

Since both seawater and alkaline solution have a certain corrosiveness, the third pump body 61 needs to be made of corrosion-resistant materials, such as high-nickel alloy steel, high-aluminum alloy, titanium alloy, tungsten alloy, etc., so as to be able to work normally under the corrosive action of seawater or alkaline environment, and have a long service life.

As shown in fig. 1, in some embodiments of the present application, the semi-open loop seawater desulfurization treatment apparatus 1 further includes a seawater recovery tank 71, the desulfurizing agent circulation device 60 conveys a part of the desulfurizing agent discharged from the desulfurization tower 10 to the desulfurization tower 10, and the desulfurizing agent circulation device 60 conveys another part of the desulfurizing agent discharged from the desulfurization tower 10 to the seawater recovery tank 71. Wherein, the desulfurizer entering the seawater recovery tank 71 can be discharged to the ocean after being further treated.

Further, a third flow valve may be disposed between the outlet of the desulfurizer circulation device 60 and the inlet of the seawater recovery tank 71, a fourth flow valve may be disposed between the outlet of the desulfurizer circulation device 60 and the main pipeline 40, both the third flow valve and the fourth flow valve are electrically connected to the ph meter 30, and the flow of the desulfurizer delivered from the desulfurizer circulation device 60 to the seawater recovery tank 71 and the flow of the desulfurizer delivered to the main pipeline 40 can be adjusted by the ph of the desulfurizer discharged from the desulfurizing tower 10 detected by the ph meter 30. For example, when the ph meter 30 detects that the desulfurizing agent discharged from the desulfurizing tower 10 is still alkaline, the opening of the third flow valve is decreased, or the opening of the third flow valve is adjusted to 0, so that more desulfurizing agent enters the desulfurizing tower 10 again and desulfurizes the sulfur-containing flue gas; when the pH value meter 30 detects that the desulfurizer discharged from the desulfurizing tower 10 is neutral, the opening degree of the fourth flow valve is reduced or adjusted to 0, so that more desulfurizer is discharged to the seawater recovery tank 71 and is discharged to the sea after post-treatment.

As shown in fig. 1, in some embodiments of the present application, the semi-open loop seawater desulfurization treatment apparatus 1 further comprises an aeration device 72, wherein the aeration device 72 is used for delivering air into the seawater recovery tank 71, that is, the aeration device 72 is used for post-treating the desulfurizing agent in the seawater recovery tank 71.

Specifically, no matter only seawater is used as the desulfurizing agent, or only alkaline solution is used as the desulfurizing agent, or a mixed solution of seawater and alkaline solution is used as the desulfurizing agent, after the desulfurizing agent absorbs sulfur dioxide, the sulfur dioxide exists in the desulfurizing agent in the form of sulfite ions, and the sulfite ions in the desulfurizing agent need to be oxidized, so that the sulfite ions are converted into sulfate ions. Therefore, the aeration device 72 is provided to deliver air to the seawater recovery tank 71 to oxidize sulfite ions in the seawater recovery tank 71 into sulfate ions using oxygen in the air.

In some embodiments of the present application, the semi-open loop seawater desulfurization treatment apparatus 1 further comprises a demister disposed at a gas outlet of the upper end of the desulfurization tower 10. It can be understood that the purified flue gas purified by the desulfurizing agent rises and is discharged out of the desulfurizing tower 10 from the gas outlet at the upper end of the desulfurizing tower 10. Because the purified flue gas contains a large amount of water vapor, in order to avoid discharging a large amount of water vapor, the upper end of the desulfurizing tower 10 is provided with a demister, so that the water vapor in the purified flue gas is condensed into water drops and converged at the bottom of the desulfurizing tower along the inner wall of the desulfurizing tower 10, and then the water drops and the desulfurizing agent are discharged together from the bottom of the desulfurizing tower 10.

Further, as shown in fig. 1, in some embodiments of the present application, the cross-sectional area of the upper end of the desulfurization tower 10 is gradually reduced. The purified flue gas desulfurized by the desulfurizing agent contains a large amount of water vapor, and water drops formed by re-condensation of part of the water vapor along with the rising of the flue gas cannot be discharged through a gas outlet at the upper end of the desulfurizing tower 10. The water vapor is condensed into water droplets and then attached to the inner wall of the desulfurization tower 10, the cross-sectional area of the upper end of the desulfurization tower 10 is set to be a tapered shape which is gradually reduced, the water droplets can be collected at the bottom of the desulfurization tower 10 along the inner wall of the desulfurization tower 10, and after being mixed with the desulfurizing agent, the water droplets are discharged together through the liquid outlet at the lower end of the desulfurization tower 10 without being collected in the desulfurization tower 10.

As shown in fig. 1, in some embodiments of the present application, the semi-open loop seawater desulfurization device 1 further includes a thermosiphon heat exchanger 80, the thermosiphon heat exchanger 80 includes an evaporator 81 and a condenser 82, a gas inlet at the lower end of the desulfurization tower 10 is communicated with the evaporator 81, a gas outlet at the upper end of the desulfurization tower 10 is communicated with the condenser 82, the sulfur-containing flue gas enters the desulfurization tower 10 after being cooled by the evaporator 81, and the purified flue gas is discharged after being heated by the condenser 82.

Specifically, as shown in fig. 1, the temperature of the sulfur-containing flue gas that does not enter the desulfurization tower 10 is high, so that the sulfur-containing flue gas is cooled by the evaporator 81 and then enters the desulfurization tower 10, while the temperature of the purified flue gas is low, and in order to facilitate the discharge of the purified flue gas, the temperature of the purified flue gas needs to be raised, so as to accelerate the discharge of the purified flue gas. Set up thermosiphon heat exchanger 80, utilize and contain the sulphur flue gas and heat the purification flue gas, utilize the purification flue gas to cool down containing the sulphur flue gas, carry out the heat transfer through containing the sulphur flue gas and purifying the flue gas, need not to add extra part and need not to consume the energy and realize above-mentioned effect promptly, reduced this half-open ring sea water desulfurization processing apparatus 1's spare part quantity, and friendly to the environment.

Since sulfur dioxide has a certain corrosiveness, the evaporator 81 needs to be made of corrosion-resistant materials, such as high nickel alloy steel, high aluminum alloy, titanium alloy, tungsten alloy, etc., so as to work normally under the corrosive action and have a long service life.

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

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

Claims (10)

1. A semi-open loop seawater desulfurization treatment device is characterized by comprising:

a desulfurizing tower;

the desulfurizing agent providing device comprises a seawater providing unit, an alkali liquor providing unit, a first flow valve and a second flow valve, wherein the seawater providing unit is used for providing seawater for the desulfurizing tower, the alkali liquor providing unit is used for providing alkaline solution for the desulfurizing tower, the desulfurizing agent providing device is used for providing desulfurizing agent for the desulfurizing tower, and the desulfurizing agent is seawater and/or alkaline solution;

the pH meter is used for detecting the pH value of the desulfurizer discharged from the desulfurizing tower;

the first flow valve and the second flow valve are both electrically connected with the pH value meter, the first flow valve is used for adjusting the flow of the seawater supply unit, and the second flow valve is used for adjusting the flow of the lye supply unit.

2. The semi-open loop seawater desulfurization treatment apparatus according to claim 1, further comprising a main pipeline, wherein the outlet of the seawater supply unit and the outlet of the alkali liquor supply unit are both communicated with the main pipeline, and the outlet end of the main pipeline is communicated with the desulfurization tower.

3. The semi-open loop seawater desulfurization treatment device of claim 2, wherein the main pipeline is provided with at least one branch pipeline, the branch pipeline is communicated with the main pipeline, and an outlet of the branch pipeline is used for spraying the desulfurizing agent.

4. The semi-open loop seawater desulfurization treatment apparatus according to claim 3, wherein the lower end of the desulfurization tower is provided with a quench pipe for entering sulfur-containing flue gas, and the at least one branch pipe is configured to spray the desulfurizing agent into the quench pipe.

5. The desulfurization treatment device for semi-open loop seawater according to claim 1, wherein a plurality of packing layers are arranged in the inner space of the desulfurization tower, the packing layers are arranged at intervals along the height direction of the desulfurization tower, and the packing layers are used for increasing the contact area and the contact time of the sulfur-containing flue gas and the desulfurizing agent.

6. The semi-open loop seawater desulfurization treatment apparatus according to claim 1, further comprising a desulfurizing agent circulation device, wherein an inlet of the desulfurizing agent circulation device is communicated with a liquid outlet at a lower end of the desulfurization tower, an outlet of the desulfurizing agent circulation device is communicated with an outlet of the desulfurizing agent supply device, and the desulfurizing agent circulation device is configured to re-convey the desulfurizing agent discharged from the desulfurization tower to the desulfurization tower.

7. The semi-open loop seawater desulfurization treatment apparatus according to claim 6, further comprising a seawater recovery tank, wherein the desulfurizing agent circulation device is configured to transport a part of the desulfurizing agent discharged from the desulfurization tower to the desulfurization tower again, and to transport another part of the desulfurizing agent discharged from the desulfurization tower to the seawater recovery tank.

8. The semi-open loop seawater desulfurization treatment apparatus according to claim 7, further comprising an aeration device for feeding air into the seawater recovery tank.

9. The semi-open loop seawater desulfurization treatment apparatus according to claim 1, further comprising a demister disposed at a gas outlet at an upper end of the desulfurization tower.

10. The semi-open loop seawater desulfurization treatment device of claim 1, further comprising a thermosiphon heat exchanger, wherein the thermosiphon heat exchanger comprises an evaporator and a condenser, a gas inlet at the lower end of the desulfurization tower is communicated with the evaporator, a gas outlet at the upper end of the desulfurization tower is communicated with the condenser, the sulfur-containing flue gas enters the desulfurization tower after being cooled by the evaporator, and the purified flue gas is discharged after being heated by the condenser.

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