KR101645895B1

KR101645895B1 - Ca-based waste and carbon dioxide removed using calcium hydroxide and by-product processing method

Info

Publication number: KR101645895B1
Application number: KR1020150120633A
Authority: KR
Inventors: 정충의
Original assignee: 정충의
Priority date: 2015-08-27
Filing date: 2015-08-27
Publication date: 2016-08-04

Abstract

The present invention relates to a method for removing carbon dioxide and byproducts using Ca-based waste and slaked lime, and more particularly, to a method for removing carbon dioxide using by- The present invention relates to a method for removing carbon dioxide and byproducts by using Ca-based wastes and slaked lime to produce calcium carbonate as a by-product and then recycling the produced calcium carbonate as a raw material in a versatile manner.
A concrete solution means of the present invention is that,
The present invention relates to a method for producing Ca-based waste, comprising the steps of: inputting Ca-based waste used and discarded in industrial and environmental fields; feeding the Ca-based waste to the mixing tank to feed water and quicklime; A carbon dioxide removing step having a reaction tank for removing the carbon dioxide introduced into the mixture by a blowing means; a step for removing carbon dioxide from the mixture after the carbon dioxide removing step; A step of pouring the liquid calcium carbonate into the calcium carbonate in a dehydrated gel state in a dehydrator to pour the calcium carbonate in the liquid phase into a calcium carbonate in a dehydrated gel state; Calcium carbonate drying step in which calcium is solidified into a granular state by drying with a microwave oscillation part In the method for removing carbon dioxide and treating by-products using Ca-based waste and slaked lime,
The microwave oscillation unit is provided in a housing of the calcium carbonate drying step in a multi-stage structure. The microwave oscillation unit is rectangular in shape and oscillates microwave into the housing. A method of removing carbon dioxide and treating byproducts using Ca-based wastes and slaked lime, wherein a discharge port of a microwave is punched and a waveguide having a mesh net is coupled to the outer peripheral surface of the discharge port "
According to the present invention configured as above, the Ca-based waste used in the industrial field and the environmental field and the waste Ca, water and calcium oxide are mixed and stirred, and then the liquid calcium carbonate produced after the carbon dioxide is removed is used as a multi- It can be used as a raw material for various purposes or, if necessary, dehydrated calcium carbonate in a liquid form to be used as a raw material for various purposes in a gel state or further dried and powdered to be used as raw materials for various purposes. The present invention can be used as a multipurpose recycled raw material of calcium carbonate produced from Ca-based waste that simultaneously achieves the above-mentioned advantages.

Description

[0001] The present invention relates to a method for removing carbon dioxide and using by-products,

The present invention relates to a method for removing carbon dioxide and byproducts using Ca-based waste and slaked lime, and more particularly, to a method for removing carbon dioxide using by- The present invention relates to a method for removing carbon dioxide and byproducts by using Ca-based wastes and slaked lime to produce calcium carbonate as a by-product and then recycling the produced calcium carbonate as a raw material in a versatile manner.

Ca wastes, which are emitted in large quantities in industrial sites and environmental fields, especially chemical plants in particular, show strong alkalinity indicating high pH, and this is a serious problem of pollution such as water pollution and soil pollution.

Therefore, when buried in the ground, it is regulated that the PH should be adjusted to the environmental standard close to neutrality.

In the meantime, studies have been made on a method of lowering the pH of the product to an environmental standard value. Among them, a method using an argillaceous stone as an additive is disclosed in Japanese Patent No. 396390, Which is a high temperature baking process.

In order to solve this problem, the technical point of the patent registration No. 10-0534239 entitled " a method for manufacturing a multipurpose recycled raw material of pulp lime using loess,

"Natural reddish brown loess is added to pulverized slaked lime powder 100 having a moisture content of 20 to 40% and pulverized lime is pulverized into pulverizer (2-1). The pulverized lime is put into a dryer (2-2) and dried to a moisture content of 3 to 10% , And then the mixture was put into a mixer, and various components contained in the loess were homogeneously mixed

Mixed 20 to 40 percent of the mixed loess powder was added to the mixer, and the mixture was heated to 80 to 100 ° C to dry to a moisture content of 10%. The mixture was subjected to a crushing process at 300 mesh or higher and a cooling process at room temperature The present invention proposes a method for producing a multi-purpose recycled raw material of pulp lime using yellow clay. &Quot;

As another prior art document, the technical point of the patent application '10-2004-0007383 entitled' Lime Sludge and Organic Lime Fertilizer Using Organic Waste and Organic Lime Fertilizer and Its Manufacturing Method '

(a) a quicklime production step of producing calcined lime by calcining a lime sludge at a temperature of 500 ° C or higher;

(b) adding and mixing 5 parts by weight to 40 parts by weight of solid matter of organic waste per 100 parts by weight of the product of step (a);

(c) assembling and molding the product of step (b);

(d) drying the product of step (c) by the heat of hydration of the product of step (a); &Quot; a method for producing a calcareous fertilizer using a lime sludge and an organic waste "

Another prior art document, Patent No. 10-1127530, entitled " Method for manufacturing a multicolor clay brick using slaked lime "

"Yellow lime or kaolin pulverized with an average particle diameter of 0.85 mm (20 Mesh) was mixed with lime powder pulverized to an average particle size of 150 탆 (100 Mesh) at a ratio selected from 5, 10, 20, 30 and 40% It is made to be 60, 70, 80, 90, 95% by weight according to the slump ratio and kneaded with water so that the water content of the kneaded product becomes 15 ~ 20% by weight. Extruded at a pressure of 2.0 to 3.0 kgf / m < 2 > under a vacuum, extruded and molded into a brick shape, dried for at least 50 hours in a drying chamber at an inlet temperature of 20 ± 5 ° C and an outlet temperature of 80 ± 10 ° C for a maximum of 70 hours, A clay brick at 300 ° C maximum temperature 1250 ° C for at least 36 hours for at least 56 hours in a tunnel kiln, or by firing and firing.

However, the above-mentioned prior art data are limited to the mixing of the raw materials or the manufacture of the specified products in the pulverized calcium lime, which is the Ca-based waste, and there is a problem in that the process, particularly the use of the lime is limited.

Korean Patent Registration No. 10-0534239 Korean Patent Publication No. 10-2004-0007383 Korea Patent No. 10-1127530 Korea Patent No. 10-0254138

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method for producing calcium carbonate, which is used in industrial and environmental fields, Can be used as a multipurpose recycled raw material, that is, as raw materials for construction materials and various other purposes, or dehydrated calcium carbonate produced in liquid form as needed, and then used as a raw material for various purposes in a gel state or further dried and powdered, The present invention has an object of providing a method for removing carbon dioxide and treating byproducts by using Ca-based wastes and slaked lime to simultaneously achieve an environmentally friendly aspect and a recycling aspect.

In order to accomplish the above object, according to a first aspect of the present invention,

The present invention relates to a method for producing Ca-based waste, comprising the steps of: inputting Ca-based waste used and discarded in industrial and environmental fields; feeding the Ca-based waste to the mixing tank to feed water and quicklime; A carbon dioxide removing step having a reaction tank for removing the carbon dioxide introduced into the mixture by a blowing means; a step for removing carbon dioxide from the mixture after the carbon dioxide removing step; A step of pouring the liquid calcium carbonate into the calcium carbonate in a dehydrated gel state in a dehydrator to pour the calcium carbonate in the liquid phase into a calcium carbonate in a dehydrated gel state; Calcium carbonate drying step in which calcium is solidified into a granular state by drying with a microwave oscillation part In the method for removing carbon dioxide and treating by-products using Ca-based waste and slaked lime,

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The microwave oscillation unit is provided in a housing of the calcium carbonate drying step in a multi-stage structure. The microwave oscillation unit is rectangular in shape and oscillates microwave into the housing. A method of removing carbon dioxide and treating byproducts using Ca-based wastes and slaked lime comprising a discharge port of a microwave is punched and a waveguide having a mesh network is coupled to the outer peripheral surface of the discharge port. Can be achieved.

According to the present invention configured as above, the Ca-based waste used in the industrial field and the environmental field and the waste Ca, water and calcium oxide are mixed and stirred, and then the liquid calcium carbonate produced after the carbon dioxide removal is used as a multi- It can be used as a raw material for various purposes or, if necessary, dehydrated calcium carbonate in a liquid phase to be used as a raw material for various purposes in a gel state, or further dried and powdered to be used as a raw material for various purposes. The present invention can be used as a multipurpose recycled raw material of calcium carbonate produced from Ca-based waste that simultaneously achieves the above-mentioned advantages.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a method for removing carbon dioxide and by-products using Ca-based waste and slaked lime according to the present invention;
FIG. 2 is a flow chart showing the addition of a crushing step in the method of removing carbon dioxide and byproducts using Ca-based waste and slaked lime according to the present invention;
3 is a schematic view of a method for removing carbon dioxide and by-products using Ca-based waste and slaked lime according to the present invention,
FIG. 4 is a schematic view showing a state in which the mixing and stirring step in the method of removing carbon dioxide and by-products using Ca-based waste and slaked liquor according to the present invention is separated into a primary mixing and stirring step and a secondary mixing and stirring step,
FIG. 5 is a general schematic view showing the addition of a reaction tank in the method of removing carbon dioxide and byproducts using Ca-based waste and slaked lime according to the present invention;
6 is a perspective view schematically showing a carbon dioxide removal step in the method of removing carbon dioxide and byproducts using Ca based waste and slaked lime according to the present invention,
FIG. 7 is a perspective view showing only the blowing means connected to the reaction vessel among the components of the carbon dioxide removal step in the carbon dioxide removal and by-product treatment using the Ca-based waste and slaked lime according to the present invention;
8 is a schematic cross-sectional view of the carbon dioxide removal step in the method of removing carbon dioxide and by-products using Ca-based waste and slaked lime according to the present invention,
9 is a perspective view of a microwave oscillation unit in the step of drying calcium carbonate in the method of removing carbon dioxide and by-products using Ca-based waste and slaked lime according to the present invention.

Hereinafter, the method for removing carbon dioxide and treating by-products using Ca-based waste and slaked lime according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a flow chart of a method for removing carbon dioxide and byproducts using Ca-based waste and slaked lime according to the present invention. FIG. 2 is a flow chart for adding a crushing step in the method for removing carbon dioxide and byproducts using Ca- FIG. 3 is a schematic view of a method for removing carbon dioxide and byproducts using Ca-based waste and slaked lime according to the present invention. FIG. 4 is a schematic view showing a process for removing carbon dioxide and by-products using Ca- FIG. 5 is a schematic view showing the addition of a reaction tank in the method of removing carbon dioxide and byproducts using Ca-based waste and slaked lime according to the present invention, and FIG. The present invention relates to a method for removing carbon dioxide and byproducts by using Ca-based waste and slaked lime And FIG. 7 is a perspective view showing only the blowing means connected to the reactor among the components of the carbon dioxide removal step in the carbon dioxide removal and by-product treatment using the Ca-based waste and slaked lime according to the present invention. And FIG. 8 is a schematic cross-sectional view of a carbon dioxide removal step and a by-product treatment method using the Ca-based waste and slaked lime according to the present invention. And is a perspective view of the microwave oscillation part in the calcium drying step.

[Ca-based waste input step] ----- S1

This phase is the step of inputting Ca waste which is used in industrial field and environmental field and discarded, and most of it is put into gas form, powder form or sometimes solid form.

In the case of the solidified form as described above, the solidified Ca-based waste is transported and crushed by a screw or the like before the mixing and stirring step (S3) to be described later, and is then pulverized (S2) may be added.

[Mixing Stirring Step] ----- S3

The added Ca-based waste is transferred to a mixing tank (T), and water and quicklime are added thereto, followed by stirring and mixing with a stirrer (M). As such, calcium hydroxide is produced mostly when Ca- will be.

The reason why the calcium oxide is further added is a measure for increasing the purity of calcium hydroxide produced.

Preferably, as shown in Fig. 4, the mixing and stirring step (S3)

A primary mixing and stirring step S3 'in which water is mixed and stirred in the Ca-based waste transferred in the Ca-based waste input step S1, and water mixed with Ca from the primary mixing and stirring step S3' (P) to transfer pumped waste to a second mixing and stirring step (S3 ") in which water and quicklime are further added and mixed and agitated, thereby increasing the purity of the calcium hydroxide produced.

[Storage step of mixture] ----- S4

After the mixing and stirring step (S3), the mixture is stirred again to generate and store a mixture of Ca-based waste, water and quicklime, and then transferred to the carbon dioxide removal step (S5).

[Carbon dioxide removal step] ----- S5

After the stirring and storing step (S4), there is provided a reaction tank (200) for removing carbon dioxide introduced by the blowing means (100)

As shown in FIGS. 6 to 8, in the carbon dioxide removing step (S5)

A blowing means 100 for supplying carbon dioxide,

And the reaction tank (200) connected to one end of the blowing means (100)

The reaction tank 200 is provided with a connecting portion 110 connected to the blowing means 100 at a lower end thereof and is made of a mixture of water transferred from the mixture storing step S4 and calcium oxide- And a plurality of injection pipes 210 crossing the inside of the upper end of the reaction tank 200 so as to be multi-stage injected after the mixture is bypassed upward by the pump P, A direct water distribution pipe 230 provided with a filter unit 220 and directly supplied to the filter unit 220 in order to clean the filter unit 220 is provided, A discharge pipe 240 for discharging carbon dioxide is formed,

The connection unit 110 forms a header pipe 130 connected to the main pipe 120 of the blowing unit 100. A plurality of branch pipes 131 are connected to and protrude from the header pipe 130, A plurality of water immersion pipes 132 are formed so as to vertically pass through each of the branch pipes 131 so as to be submerged in the mixture stored in the reaction tank 200, to be.

Meanwhile, the branch pipe 131 has a structure in which the inner diameter of the branch pipe 131 gradually decreases from the header pipe 130,

Preferably, the water immersion tube 132 has the same diameter.

The connection unit 110 forms a header pipe 130 connected to the main pipe 120 of the blowing unit 100. A plurality of branch pipes 131 are connected to the header pipe 130, And allowing the carbon dioxide to flow into the reaction vessel 200 through the reaction vessel 200,

More preferably, as shown in FIG. 5, a plurality of reaction vessels 200 are formed.

According to the present invention configured as described above, carbon dioxide is introduced into the reaction tank 200 side by the blowing means 100, and after the reaction between the mixture supplied from the mixture storage step S4 and the carbon dioxide, And discharged.

Wherein to generate calcium hydroxide (Ca (OH) _2), calcium carbonate (CaCo ₃₎ in combination with the CO ₂ as the most for the mixture supplied from the mixture storage step (S4) are, CO ₂ removal. This will be described later.

Meanwhile, the blowing means 100 is provided as a means for introducing carbon dioxide into the reactor 200 side.

As shown in the drawing, the blowing means 100 adopts a connecting portion 110 for connecting the blowing fan to the reaction tank 200 to introduce carbon dioxide into the reaction tank 200, A header pipe 130 connected to the main pipe 120 of the blowing means 100 is formed and a plurality of branch pipes 131 are connected and protruded from the header pipe 130, A plurality of water immersion pipes 132 are vertically connected to each one of the branch pipes 131 so as to be submerged in the mixture stored in the reaction tank 200.

That is, the main pipe 120 connected by flange connection from the blowing means 100 has a header pipe 130 connected to the main pipe 120 in an orthogonal direction.

The speed and flow rate of the fluid flowing through the header pipe 130 and the main pipe 120 should be designed to be the same.

A branch pipe 131 is separately formed from the header pipe 130 so as to pass through the inside of the reaction tank 200.

Here, as shown in the figure, the branch pipe 131 is preferably formed to be smaller in steps as its diameter moves away from the header pipe 130.

That is, when the fluid pressure, the flow rate and the flow rate of the carbon dioxide supplied from the blowing means 100 pass through the main pipe 120 and the header pipe 130 as well as to the end of the branch pipe 131, The effect of reaction with the mixture stored in the reaction tank 200 can be increased.

And a water immersion tube 132 is connected to the lower end of each of the branch pipes 131 so as to be equally spaced and connected in an orthogonal form and to be submerged in the stored mixture in the reaction tank 200.

Each of the water immersion pipes 132 here has the same diameter.

The carbon dioxide is guided from the main pipe 120 of the connection part 110 to the header pipe 130 and then branched from the header pipe 130 by the operation of the blower 100. Thus, And is immersed in the mixture stored in the reaction tank 200 through the submerged pipe 132 orthogonally connected to the lower portion of the branch pipe 131 so that the carbon dioxide is discharged toward the submerged pipe 132 and reacted with the mixture will be.

The reaction at this time is made with calcium hydroxide (Ca (OH) ₂ ), and the reaction formula is as follows.

_{Ca (OH) 2 + CO 2} -> CaCO 3 + H 2 O

The connecting portion 110 of the blowing means 100 may be configured differently from the header pipe 130 connected to the main pipe 120 of the blowing means 100, (131) are connected to and protrude from the reaction tank (200), and carbon dioxide can be introduced into the reaction tank (200) through the reaction tank (200).

The branch pipe 131 penetrates through the reaction tank 200 without passing through the submerged pipe 132 in the form of the above-described submerged pipe 132, but is configured to pass through the pipe in a state close to the inner peripheral surface of the reaction tank 200.

Therefore, when such a structure is provided, the carbon dioxide introduced from the air blowing means 100 is supplied to the lower end side of the reaction tank 200, and a reaction occurs while colliding with the surface layer of the mixture water.

Meanwhile, in the mixture storing step (S4), a multi-stage injection is performed after bypassing upward flow by a pump (P).

That is, the mixture supplied from the mixture storing step (S4) to the reaction tank (200) and stored is bypassed upward in accordance with the operation of the pump (P) 210 to the lower side of the reaction tank 200.

Here, the injection pipe 210 may be formed in multiple stages in the upper and lower portions of the reaction tank 200 as shown in the drawing.

Therefore, the mixture flowing by bypass to the injection pipe 210 is sprayed from the upper side to the lower side of the reaction tank 200 and falls down naturally. The reaction mixture is stored in the lower part of the reaction tank 200 and reacts with rising carbon dioxide.

In order to solve this problem, carbon dioxide on the gaseous mixture forced to the inside of the mixture is raised through the surface of the mixture water surface, and the convection on the upward side of the reaction tank 200 The carbon dioxide can be completely removed through the re-reaction between the gas whose carbon dioxide has not been completely removed in the convection process and the mixture sprayed through the injection pipe 210 side.

In addition, since the injection tube 210 can be equally spaced apart from the proper position, it is possible to increase the removal efficiency of carbon dioxide.

The filter unit 220 is provided on the injection pipe 210 so that impurities or water contained in the carbon dioxide can be filtered and intermittently supplied to the filter unit 220 And the water distribution pipe 230 for cleaning the filter unit 220 is provided.

In addition, a discharge pipe 240 for discharging carbon dioxide is formed in the direction of the direct flow water distribution pipe 230 so that the rising carbon dioxide is discharged to the outside through the above-described process.

[Calcium carbonate storage step] ----- S6

After the carbon dioxide removing step (S5), the liquid calcium carbonate that is pumped and stored by the pump (P) is stored.

The liquid calcium carbonate thus stored is mixed with raw materials for various applications, for example, as a building material, or used as a raw material for producing other products.

[Calcium carbonate dehydration step] ----- S7

On the other hand, when calcium carbonate in a liquid state is not used and the user desires calcium carbonate in a gel state, the calcium carbonate in the liquid phase is pumped by the injection pump P1 as in the present step so that the dehydrated gel- It can be made of calcium carbonate and can meet the needs of users. It can also be used as a raw material for manufacturing desirable products mixed with various building materials and other raw materials of products.

[Calcium carbonate drying step] ----- S8

In this step, as in the case of the dehydration step (S7), if the user desires to solidify the granule or the chip form, the user desires to dry the dehydrated gel calcium carbonate with the microwave oscillation unit 800 to solidify the granulated calcium carbonate Or may further be pulverized by a pulverizer as in the pulverization step (S9) to produce a variety of products capable of circulating the product.

Preferably, drying by hot air in the step (S8) of drying the calcium carbonate is also applicable.

In particular, the microwave oscillation unit 800 includes:

The microwave is a rectangular shape that oscillates microwave into the housing (H) in a multistage manner in the housing (H) of the calcium carbonate drying step (S8) A structure in which a microwave discharge port 823 is drilled in the slant surface in the shape of a light beam and a waveguide 820 having a mesh network 824 is coupled to the outer peripheral surface of the discharge port 823, Lt; / RTI >

The present invention having the above-described constitution is used in industrial field and environment field, and Ca-based waste which is used and disused, water and quicklime are mixed and stirred, and then the liquid calcium carbonate produced after the carbon dioxide is removed is used as a multipurpose recycled raw material, Or by dewatering calcium carbonate produced in liquid form as needed to be used as a raw material for various purposes in a gel state or further dried and powdered to be used as a raw material for various purposes. As a result, environmentally friendly aspects and recycling At the same time,

As shown in FIGS. 1 to 5, the Ca-based waste used and discarded in the industrial field and the environmental field is transferred to a mixing tank (T), and water and quicklime are introduced. Then, the mixture is stirred and mixed with a stirrer (M) And the carbon dioxide added by the blowing means is removed to generate calcium carbonate. The calcium carbonate is selectively stored in a liquid state, in a gel state through a dehydrator, in a dried state, in a solidified state or in a powder state. It is a useful technology to recycle the calcium carbonate which should be discarded by mixing with various raw materials of building materials and products by providing the desired shape.

100; Blowing means 110; Connection
120; A main pipe 130; Header tube
131; Branch 132; Immersion tube
200; Reaction tank 210; Sprayer
220; A filter unit 230; Direct water distributor
240; A discharge pipe 800; The microwave oscillation portion
820; Waveguide 822; incline
823; A discharge port 824; Mesh network
H; Housing M; agitator
T; Mixing tank P; Pump
P1; Injection pump W; Dehydrator
S1; Ca-based waste input step S2; Crushing step
S3; Ca-based waste and water mixing and stirring step S3 '; Primary mixing stage
S3 "; secondary mixing and stirring step S4;
S5; Carbon dioxide removal step S6; Calcium carbonate storage step
S7; Calcium carbonate dehydration step S8; Calcium carbonate drying step
S9; Powdering step

Claims

(S1) which is used in the industrial field and the environmental field and which is to be discarded and which is to be discarded and the Ca-based waste is transferred to a mixing tank (T), and water and quicklime are added thereto, followed by stirring and mixing with a stirrer (S4) for storing and storing the mixture by stirring after the mixing and stirring step (S3) and the mixing and stirring step (S3), and a reaction tank (200) for removing the carbon dioxide introduced by the air blowing means A liquid phase calcium carbonate storage step (S6) in which the liquid phase calcium carbonate is pumped and stored by the pump (P) through the provided carbon dioxide removing step (S5) and the carbon dioxide removing step (S5) P1 to form a dehydrated calcium carbonate in a dehydrated gel state in the dehydrator W and drying the dehydrated gelated calcium carbonate in the microwave oscillation unit 800 to remove the particles (S8). In the method for removing carbon dioxide and treating byproducts using Ca-based waste and slaked lime,
The microwave oscillation unit 800 includes:
The microwave is a rectangular shape that oscillates microwave into the housing (H) in a multistage manner in the housing (H) of the calcium carbonate drying step (S8) And a waveguide (820) having a mesh net (824) is coupled to the outer peripheral surface of the discharge port (823), and a Ca-based waste and a calcium hydroxide Use of carbon dioxide removal and byproduct treatment.

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