KR200258845Y1 - Secondary combustion and reaction device of waste treatment device - Google Patents

Abstract

The present disclosure relates to a secondary combustion and reaction apparatus which enables simultaneous treatment of a high concentration of acid gas, incomplete combustion gas, and dust containing exhaust gas through a melting furnace of a waste treatment apparatus in one reactor.

The secondary combustion and reaction apparatus 200 includes a sodium hydroxide inlet, an NaOH inlet formed with an air inlet, a cooling inlet and a cooling outlet; NaOH injected through the inlet of the NaOH injection unit forms a reaction reactor for causing a chloride reaction with acid gas, and forms a gas inlet for supplying the waste gas after the waste treatment into the reactor, exhaust gas supplied from the gas inlet A secondary burner having a gas burner for burning the gas and formed with a secondary air inlet for injecting air to completely burn the exhaust gas burned by the gas burner; And forming a molten pool for collecting the molten salt generated by NaOH injected into the NaOH injection unit by causing a chloride reaction with an acidic gas, forming a molten salt outlet for discharging the molten salt collected in the molten pool, and discharging the gas. A molten salt discharge portion formed as a negative portion is achieved.

Description

Secondary combustion and reaction device of waste treatment device

The present invention relates to a secondary combustion and reaction apparatus of a waste treatment apparatus in which the chlorination reaction of oxidizing gas and the discharge means of molten salt are implemented simultaneously with the secondary combustion of the waste treatment apparatus.

Figure 1a of the accompanying drawings is a schematic diagram showing an example of the process of the secondary combustion of the conventional waste after the melting furnace.

According to the conventional post-treatment process according to this drawing, the incomplete combustion gas exiting the melting furnace 100 is completely burned in the secondary combustion furnace 110 and then the molten fly ash is passed through the cooling means 150 in the back filter 120, the acidic gas. The components are removed from the shock scrubber 130 and discharged to the stack 170 through the blower fan 160.

Figure 1b is a schematic diagram of another example showing a process in which the conventional waste secondary combustion after passing through the melting furnace.

According to the conventional post-treatment process according to this drawing, the incomplete combustion gas exiting the melting furnace 100 is completely burned in the secondary combustion furnace 110 and then the molten fly ash is passed through the cooling means 150 in the back filter 120, the acidic gas. The components are discharged to the stack 170 through the back blowing fan 160 respectively removed from the semi-dry absorption tower 140.

In order to process the incomplete combustion gas, acid gas, and some dust through the melting furnace, the secondary combustion furnace 110, semi-dry absorption tower 140, shock scrubber 130, back filter 120, etc. It must be equipped with the disadvantages of large scale.

In addition, the acidic gas component has a problem of generating waste water when treated in a shock scrubber, when the semi-dry absorption tower is used, the amount of dust generated by the use of excess Lime has a disadvantage in the treatment of molten ash. In particular, the generated salt generating equipment is not equipped from the beginning there was a problem that can not discharge salt.

The present invention, in consideration of the problems of the after-treatment facilities having a secondary combustion furnace as described above, it is possible to simultaneously process a large amount of acid gas and incomplete combustion gas generated in the waste treatment in one reactor, Melting secondary combustion and reaction apparatus for waste treatment which allows the combustion temperature to be burned to a predetermined high temperature and reacts with the NaOH solution to be discharged as a recyclable molten salt and at the same time to discharge a predetermined amount of dust during melting of the molten salt. The purpose is to provide.

Figure 1a is an exemplary system diagram showing a process in which the conventional waste secondary combustion after passing through the melting furnace

Figure 1b is a schematic diagram of another example showing a process in which the conventional waste secondary combustion after passing through the melting furnace

2 is a system diagram showing a process in which waste is secondaryly burned through a reactor according to the present invention after passing through a melting furnace.

Figure 3 is a front schematic view of the secondary combustion and reactor design

Figure 4 is a longitudinal cross-sectional view of the subject secondary combustion and reaction apparatus

5A is a cross-sectional view taken along the line A-A of FIG. 4, FIG. 5B is a cross-sectional view taken along the line B-B of FIG. 4, and FIG. 5C is an enlarged cross-sectional view of the main portion B of FIG.

※ Explanation of code for main part of drawing

200: Reactor ...... 210: NaOH injection device

212: Inlet port ............ 214: Air inlet port

216: Cooling water inlet ........................ 218: Cooling water inlet

220: Second combustion part ............... 221: Perspective window

222: Exhaust gas inlet ......... 224: Burner

226: reaction space ... 228: secondary air inlet

230: molten salt discharge part ............ 232: molten pool

234: molten salt outlet ......... 236: exhaust gas outlet

Such secondary combustion and reaction apparatus of the present invention is a sodium hydroxide inlet, NaOH inlet formed with an air inlet, the cooling inlet and the cooling outlet; NaOH injected through the inlet of the NaOH injection unit forms a reaction reactor for causing a chloride reaction with the acidic gas, forming a gas inlet for supplying the waste gas after the waste treatment into the reactor, exhaust gas supplied from the gas inlet A secondary burner having a gas burner for burning the gas and formed with a secondary air inlet for injecting air to completely burn the exhaust gas burned by the gas burner; And forming a molten pool for collecting the molten salt generated by NaOH injected into the NaOH injection unit by causing a chloride reaction with an acidic gas, and forming a molten salt outlet for discharging the molten salt collected in the molten pool and discharging the gas. A molten salt discharge portion formed as a negative portion is achieved.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a front schematic view of the present invention aftertreatment reactor, FIG. 4 is a longitudinal sectional view of the present invention aftertreatment reactor, FIG. 5A is a cross-sectional view taken along line AA of FIG. 4, and FIG. 5B is a line BB of FIG. 4. It is sectional drawing, and FIG. 5C is an enlarged sectional view of the principal part B of FIG.

Secondary combustion and reaction apparatus 200 according to the drawings comprises a NaOH injection device 210, a secondary combustion unit 220, and a molten salt discharge device 230 from above along the furnace wall of the basic refractory material.

The NaOH injection device 210 includes a NaOH inlet 212, an air inlet 214, a cooling inlet 216, and a cooling outlet 218, as shown in FIG. 4.

The secondary combustion unit 220 includes a gas inlet 222, a secondary air inlet 228, and a reaction space 226.

The molten salt discharge device 230 includes a molten pool 232, a molten salt outlet 234, and an exhaust gas outlet 236.

Secondary combustion and reaction apparatus of the present invention made as described above is a waste gas after the waste treatment in the melting furnace 240 as shown in the schematic diagram (Fig. 2) showing the process of the secondary combustion of the waste through the reactor of the present invention after passing through the melting furnace. It is supplied to the gas inlet 222 of the combustion combustion and reactor 200. The supplied gas is burnt in the high temperature state of about 1300 ° C. or more through the gas burner 224 in the reaction space 226 of the secondary combustion unit 220, and at the same time, the air is supplied incompletely through the secondary air inlet 228. The gas supplied in gas state is completely burned.

At the same time, NaOH is supplied through the inlet 212 of the NaOH injector 210 while air is supplied through the air inlet 214, and the air is cooled through the cooling inlet 216 and the outlet 218. In the combustion reaction space 226, a predetermined chlorination reaction takes place.

That is, the injected NaOH reacts with an acid gas such as HCL in the exhaust gas to obtain Nacl, and the Nacl forms a molten droplet on the inner wall of the secondary combustion and reactor of the present invention while forming molten droplets of the molten salt discharge device 230. Got to). The molten salt collected is discharged through the molten salt discharge port 234.

At this time, the molten salt discharged includes a considerable amount of dust to increase the dust removal rate, and the exhaust gas after the molten salt reaction is discharged through the exhaust gas outlet 236.

As such, the present invention is capable of simultaneously treating high concentration acid gas, incomplete combustion gas, and dust-containing flue gas as one complex treatment device at the same time in the process of purifying the flue gas after being melted and discharged into slack through the melting furnace during waste treatment. The facility was simplified, and it was possible to recycle dust as a melting point lowering agent by reducing dust emissions and recovering molten salt through a predetermined reaction process.

Thus, in order to treat incomplete combustion gas, acid gas, and some dust, which have gone through the conventional melting furnace, it is necessary to equip secondary combustion furnace, semi-dry absorption tower, fan scrubber, back filter, etc. It is effective, and the problem of waste water generation when treating acid gas component through wet scrubber is improved, and the amount of dust is not generated much like the case of semi-dry absorption tower. There is also an effect that the new generation facility can be discharged of salt.

Claims (3)

In the secondary combustion device for waste treatment, A NaOH inlet formed with a sodium hydroxide inlet, an air inlet, a cooling inlet and a cooling outlet; NaOH injected through the inlet of the NaOH injection unit forms a reaction reactor for causing a chloride reaction with acid gas, and forms a gas inlet for supplying the waste gas after the waste treatment into the reactor, exhaust gas supplied from the gas inlet A secondary burner having a gas burner for burning the gas and formed with a secondary air inlet for injecting air to completely burn the exhaust gas burned by the gas burner; And The NaOH injected into the NaOH injection unit forms a molten pool for collecting the molten salt generated by causing a chloride reaction with the acidic gas, and forms a molten salt outlet for discharging the molten salt collected in the molten pool, the gas discharge unit Secondary combustion and reaction apparatus of the waste treatment apparatus comprising a molten salt discharge portion formed. The secondary combustion and reaction apparatus of claim 1, wherein the molten salt is Nacl. The secondary combustion and reaction apparatus of claim 1 or 2, wherein the molten salt discharged from the molten salt discharge port of the molten salt discharge portion is reused as a melting point lowering agent.