KR20120124830A - Simulator for incineration and thermal decomposition of wastes - Google Patents

Abstract

PURPOSE: An incineration and pyrolysis simulator is provided to confirm a shrank extent of a specimen by observing shapes before/after a reaction of the pyrolyzed/burnt specimen, thereby prescribing pyolysis/combustion reaction properties of the specimen. CONSTITUTION: An incineration and pyrolysis simulator(10) comprises a housing(20), a combustion chamber(30), and a specimen weight measuring device(40). A space unit(20a) is formed in the inside of the housing. The combustion chamber is arranged on the top of the housing. A hollow(30a) connected to the space unit is formed in the inside of the combustion chamber. The specimen weight measuring device is installed in the space unit of the housing to be moved up and down. The specimen weight measuring device measures weight variations of a specimen(S) being burnt in the combustion chamber. A transparent window(27) is comprised in one side of the housing so that the space unit is observed through the window.

Description

Simulator for incineration and thermal decomposition of wastes

The present invention relates to an incineration and pyrolysis simulator. More particularly, the present invention relates to a reaction model of a sample by measuring the temperature, reaction time, flue gas concentration, and weight change of the sample during pyrolysis by burning the sample. The present invention relates to an incineration and pyrolysis simulator for obtaining various characteristic values related to pyrolysis and combustion reactions.

Typically, thermogravimetric analysis (TGA) or similar devices are used to observe kinetic data and pyrolysis or pyrolysis characteristics, such as mixed waste.

In determining the thermal decomposition characteristics of such mixed waste, a typical pyrolysis analyzer has a very small amount of samples used for analysis, and the smaller the amount of the sample, the lower the reliability of the analysis result.

The thermogravimetric analyzer operates on a principle similar to that of a pyrolysis device, and includes a combustion chamber for burning a sample, a weighing unit for measuring the weight of a sample that changes with the combustion of the sample over time, and an exhaust gas and an inert gas generated during combustion. It is made to include a discharge port and the like discharged to.

The thermogravimetric analyzer configured as described above records the weight change of the sample with time and temperature while maintaining the temperature of the sample at a constant rate or isothermally in a specific gas atmosphere, thereby pyrolysis, sublimation, oxidation, reduction, desorption, absorption, By analyzing the increase and decrease of the sample weight due to evaporation, the decomposition characteristics of the sample are analyzed.

The thermogravimetric analyzer observes dynamic phenomena by taking 2.0g or less samples from mixtures of target materials, especially mixed wastes, for thermogravimetric analysis. Has a low problem.

In addition, in the field of using mixed waste as fuel, it is difficult to grasp the thermal characteristics of the waste by using the existing TGA device alone, and it is difficult to simulate the actual incineration process because the experiment is performed in nitrogen atmosphere. .

In addition, in terms of the amount of sample as well as the size, the accuracy of the characteristics obtained from the TGA is less than the size of the actual combustion incinerator and combustion furnace.

The present invention has been made to solve the above-described problems, an embodiment of the present invention is a combustion chamber in which a housing is provided with a space therein, and a hollow is installed inside the housing and communicated with the space is formed therein. And a sample weight measuring device installed on the space of the housing to measure the change of the weight of the sample combusted in the combustion chamber, and incineration and pyrolysis that can derive the thermogravimetric analysis result using a large amount of samples. Related to the simulator.

According to a preferred embodiment of the present invention, a housing having a space provided therein, a combustion chamber installed in the upper portion of the housing and communicating with the space formed therein, and installed in the space portion of the housing, An incineration and pyrolysis simulator is provided that includes a sample weight measuring device for measuring a change in weight of a sample that is combusted in a combustion chamber.

At this time, it is preferable that one side of the housing is provided with a transparent window to observe the space portion.

In addition, the combustion chamber includes a lower primary combustion chamber and an upper secondary combustion chamber, and the boundary between the primary combustion chamber and the secondary combustion chamber is partitioned by an inner wall in the form of a nozzle.

At this time, the upper one side of the primary combustion chamber is provided with a primary combustion gas collecting tube, the upper one side of the secondary combustion chamber is provided with a secondary combustion gas collecting tube.

In addition, the sample weight measuring device is provided so as to be able to move up and down, a measuring scale for measuring the weight of the sample, a sample holder provided on the upper portion of the measuring scale and containing the sample, and a space between the sample holder and the measuring scale to provide a space from the combustion chamber. It includes a heat shield cap to block heat transfer to the part.

At this time, the sealing ring is preferably provided along the upper edge of the electronic balance.

In addition, at least one atmospheric gas injection tube is provided below the combustion chamber.

At this time, the at least one pair of the atmosphere gas injection tube is spaced apart from each other in the circumferential direction in the lower portion of the combustion chamber, it is preferable that the adjacent pair is different in diameter and incidence angle.

Meanwhile, an exhaust gas scrubber connected to the primary combustion gas collecting tube or the secondary combustion gas collecting tube may be provided at one side of the housing to clean the combustion gas.

At this time, the exhaust gas scrubber is preferably made of a silica gel filter and a glass wool (glass wool) filter connected to each other.

According to the incineration and pyrolysis simulator according to an embodiment of the present invention, more accurate samples can be obtained as compared to the conventional example, and thus more accurate data can be obtained, and the reaction forms before and after the reaction of the pyrolyzed / burned samples. By determining the shrinkage of the sample by observing, it is possible to define the pyrolysis / combustion characteristics of the sample.

In addition, since the combustion chamber is divided into two stages of the primary combustion chamber and the secondary combustion chamber, and the atmospheric gas supplied to each combustion chamber can be controlled by the oxidation or reduction atmosphere, the combustion reaction of the sample is the secondary reaction in addition to the primary reaction. If necessary, it is possible to determine the characteristic value of the combustion gas by measuring how long residence time and secondary combustion air are required.

In addition, the temperature and reaction time of the primary combustion chamber and the secondary combustion chamber, the reaction time, exhaust gas concentration, the weight change of the sample is measured in real time, expressing the concentration and weight loss of all exhaust gas components measured as a function of the temperature and reaction time, It is possible to obtain data to obtain various characteristic values related to the reaction model and pyrolysis / combustion reaction.

1 is a block diagram of an incineration and pyrolysis simulator according to an embodiment of the present invention.
Figure 2 is a detailed view of the incineration and pyrolysis simulator according to an embodiment of the present invention.
3 is a layout view of an atmosphere gas injection tube according to an embodiment of the present invention.
Figure 4 is a state of use of the sample weight measuring apparatus according to an embodiment of the present invention.
Figure 5 is a photograph showing the state before and after the pyrolysis / combustion reaction of various samples.
6 is a graph showing the weight loss curves of various wastes as a function of temperature and time using incineration and pyrolysis simulators in accordance with one embodiment of the present invention.
7 is a graph showing weight loss curves of various wastes as a function of temperature and time using a conventional thermogravimetric analysis device (TGA).
9 is a graph showing a change in concentration of flue gas detected during pyrolytic combustion of char and RPF utilizing only the primary combustion function;
FIG. 10 is a graph showing changes in concentrations of flue gas detected during pyrolytic combustion of char and RPF utilizing primary and secondary combustion functions. FIG.

Hereinafter, a preferred embodiment of the incineration and pyrolysis simulator according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as exemplifications of the constituent elements set forth in the claims of the present invention, and are included in technical ideas throughout the specification of the present invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

Example

1 is a block diagram of an incineration and pyrolysis simulator according to an embodiment of the present invention, Figure 2 is a detailed view of the incineration and pyrolysis simulator according to an embodiment of the present invention.

As shown in FIG. 1 and FIG. 2, the incineration and pyrolysis simulator 10 according to an embodiment of the present invention includes a housing 20 in which a space portion 20a is provided and an upper portion of the housing 20. A combustion chamber 30 having a hollow 30a formed therein and communicating with the space portion 20a of the housing 20, and installed in a liftable manner in the space portion 20a of the housing 20, and the combustion chamber 30. Including a sample weight measuring device 40 for measuring the change in the weight of the sample (S) that is burned in, the exhaust gas scrubber 50 for cleaning the combustion gas discharged from the combustion chamber 30 is on one side of the housing 20 It may be further provided.

At this time, the housing 20 is a hexahedral shape in which the space portion 20a is formed therein as a whole, and it is preferable that a plurality of wheels 21 are provided at the bottom and are freely movable.

In addition, on both sides of the front surface of the housing 20, a pressure gauge 22 indicating an internal pressure, a regulator operating button 23 for supplying an atmospheric gas, a flowmeter 24 indicating an amount of atmospheric gas supply, and a sample weight measurement Various indicators and operation switches and buttons are provided, such as an elevating button 25 for elevating the device 40 and an adjusting switch 26 for elevating speed.

At this time, the transparent window 27 is installed in the front center portion of the housing 20, the user can observe the space portion 20a inside the housing 20 through the transparent window 27, in particular, the sample (S) The degree of shrinkage can be checked by observing before and after combustion.

The upper part of the housing 20 is provided with a combustion chamber 30 having a heating wire (not shown) therein, the combustion chamber 30 has a circular cross-sectional hollow (30a) therein, the hollow (30a) It communicates with the space part 20a of the housing 20 perpendicularly.

In addition, the combustion chamber 30 may have a cylindrical or polyhedral shape having a rectangular cross section or a hexagonal cross section, for example, and is installed vertically in the height direction so that the primary combustion chamber 31 and the secondary combustion chamber 32 are disposed therein. It is formed in turn from below.

That is, the primary combustion chamber 31 is provided in the lower portion of the combustion chamber 30, the secondary combustion chamber 32 is provided in the upper portion of the primary combustion chamber 31, the primary combustion chamber 31 and the secondary combustion chamber 32 Hollow 30a are in communication with each other.

At this time, the reaction temperature of the primary combustion chamber 31 and the secondary combustion chamber 32 is increased in accordance with the heating rate (° C./min) set by the temperature control and monitoring device 70 while the electric wire is supplied with power. Done.

In addition, a heat insulating material 33 is interposed between the primary combustion chamber 31 and the secondary combustion chamber 32 at the boundary portion, and the inner wall of the heat insulating material 33 preferably has a nozzle shape as shown in FIG. 2. Accordingly, the combustion gas generated in the primary combustion chamber 31 is diffused into the secondary combustion chamber 32 while passing through the nozzle, and after being sufficiently mixed with the atmospheric gas injected into the secondary combustion chamber 32, the combustion reaction occurs. .

On the other hand, in the primary combustion chamber 31 and the secondary combustion chamber 32, a plurality of temperature sensors 34 for measuring the respective internal temperature according to the height are disposed spaced apart from each other in the height direction, In the lower part, primary atmosphere gas injection pipes 35 for injecting primary atmosphere gas into the primary combustion chamber 31 are spaced apart from each other in the circumferential direction of the hollow 30a to adjust the combustion atmosphere of the primary combustion chamber 31. A plurality of secondary atmosphere gas injection pipes 36 are provided in the lower portion of the secondary combustion chamber 32 to inject the secondary atmosphere gas into the secondary combustion chamber 32 to adjust the combustion atmosphere of the secondary combustion chamber 32. A plurality of spaced apart from each other in the circumferential direction of the hollow (30a) is provided.

At this time, the secondary atmosphere gas injection pipe 36 is preferably disposed at the neck of the nozzle-shaped boundary so that the combustion gas generated in the primary combustion chamber 31 and the secondary atmosphere gas can be sufficiently mixed. Do.

In addition, the primary combustion gas collecting tube 37 for collecting the combustion gas generated in the primary combustion chamber 31 is provided in the upper portion of the primary combustion chamber 31, the combustion gas generated in the secondary combustion chamber 32 The secondary combustion gas collecting tube 38 to be collected is provided at an upper portion of the secondary combustion chamber 32, and the collected combustion gas is subjected to various characteristics of the combustion gas through a pretreatment unit of gas 50 to be described later. It is sent to the combustion gas analyzer 60 to measure.

3 is a layout view of an atmosphere gas injection tube according to an embodiment of the present invention.

As illustrated in FIG. 3, the plurality of primary atmosphere gas injection pipes 35 prevent the sample S from being disturbed due to the flow of air due to the injection of the atmosphere gas, while the sample by the injection pressure ( In order to prevent the occurrence of an error in the weighing of S), at least one pair is horizontally spaced apart from each other in the circumferential direction of the hollow 30a.

More specifically, as shown in the example shown in FIG. 3, when the four primary atmosphere gas injection pipes 35 are disposed on an imaginary horizontal plane spaced apart from each other in the circumferential direction of the hollow 30a, each primary The atmosphere gas injection pipe 35 is disposed such that the injection hole at the end has an incidence angle α, β slightly inclined with respect to the outer circumferential surface of the sample holder 42.

At this time, the sample holder 42 is inserted into the hollow (30a) of the combustion chamber 30 by the rise of the sample weight measuring device 40, a detailed description thereof will be described later.

At this time, the pair of primary atmosphere gas injection pipe 35 facing each other has a diameter slightly larger than the other pair, by the same injection pressure, a pair of primary atmosphere gas injection pipe 35 It is desirable to allow the internal gas flow rate and the remaining pair of internal flow rates to differ by, for example, about 50%.

In addition, it is preferable that the incidence angle α of the pair of primary atmosphere gas injection tubes 35 facing each other and the pair of incidence angles β remaining different from each other be arranged.

This is to ensure that the combustion gas and the atmosphere gas are sufficiently mixed, and the arrangement of the secondary atmosphere gas injection pipe 36 is also the same as the arrangement of the primary atmosphere gas injection pipe 35 described above. The atmosphere gas injection pipe 36 differs in that it is disposed at the neck of the nozzle.

On the other hand, by appropriately selecting the types of the primary atmosphere gas and the secondary atmosphere gas injected into the primary combustion chamber 31 and the secondary combustion chamber 32, the thermal decomposition / combustion reaction can be caused as follows.

First, when both the primary atmosphere gas and the secondary atmosphere gas are selected as nitrogen, the first and second pyrolysis reactions occur sequentially in the primary combustion chamber 31 and the secondary combustion chamber 32.

In addition, when nitrogen is selected as the primary atmosphere gas and oxygen is selected as the secondary atmosphere gas, pyrolysis reaction occurs in the primary combustion chamber 31, and combustion (oxidation) reaction occurs in the secondary combustion chamber 32.

In addition, when oxygen is selected as the primary atmosphere gas and nitrogen is selected as the secondary atmosphere gas, combustion (oxidation) reaction occurs in the primary combustion chamber 31, and supply of inert gas is supplied to the secondary combustion chamber 32. Due to this, an additional reaction of the oxygen remaining after reacting in the primary combustion chamber 31 occurs.

On the other hand, when both the primary atmosphere gas and the secondary atmosphere gas are selected as oxygen, combustion reaction occurs sequentially in the primary combustion chamber 31 and the secondary combustion chamber 32.

At this time, it is also possible to test the pyrolysis / combustion reaction by supplying air and nitrogen to the secondary combustion chamber 32 at a constant ratio, and adjusting the residence time of the secondary combustion chamber 32 of the combustion gas.

4 is a state diagram used in the sample weight measurement apparatus according to an embodiment of the present invention.

As shown in Figure 2 and 4, the sample weight measuring device 40 according to an embodiment of the present invention, the measurement scale 41 is installed so as to lift and measure the weight of the sample (S), and the measurement It is provided on the upper portion of the balance 41 and is provided between the sample holder 42 containing the sample S, and the sample holder 42 and the measurement scale 41 to transfer heat from the combustion chamber 30 to the space portion 20a. It comprises a heat shield cap 43 for blocking the through, through the RS485 communication interface 411 provided on one side of the measurement scale 41, temperature control and monitoring the continuous weight change of the sample (S) during the combustion process This can be seen in the device 70.

Conventional thermogravimetric analyzers use a balance balance for the measurement of samples. That is, the weighing unit was placed in the upper part of the combustion chamber, and a dish was attached to the wire hanging down from the weighing unit, and the weight change of the sample contained in the dish was measured by the weighing unit.

However, in this case, when the amount of the sample is large, a part of the sample may be released from the plate during pyrolysis or combustion, and an error occurs when measuring the weight of the sample while the wire or the plate is shaken by the injection pressure of the atmospheric gas. have.

In view of this, the sample weight measuring device 40 according to an embodiment of the present invention, the sample holder 42 containing the sample (S) on the upper portion of the measurement scale 41, the The method of measuring the weight change of the sample (S) at the bottom is applied.

In this case, the measurement scale 41 may use a conventional precision electronic balance capable of weighing in the manner described above.

In addition, the sample holder 42 has a flat bottom and a sidewall is formed at a predetermined height along an edge, and preferably has a circular flat bowl shape.

According to the sample holder 42 according to an embodiment of the present invention, a large amount (for example, 100g) of the sample (S) can be contained therein, since a sidewall of a predetermined height is formed on the edge, pyrolysis or combustion process The separation of the sample S can be prevented.

Pyrolysis and combustion of the sample S are performed in the combustion chamber 30.

Therefore, for pyrolysis and combustion, the sample holder 42 containing the sample S should be able to move from the space portion 20a in the housing 20 to the hollow 30a of the combustion chamber 30. 41 is installed in the space portion 20a of the housing 20 so as to be lifted and lowered.

As an example of such elevating means, an elevating cylinder operated by air or hydraulic pressure may be installed at the lower portion of the measuring scale 41, and as shown in FIGS. 2 and 4, the operation of a motor (not shown). By rotating the lead screw 44 can be screwed vertically to the lower portion of the measurement scale 41.

On the other hand, after the sample holder 42 is inserted into the hollow 30a in the combustion chamber 30 by the rising of the measurement scale 41, the combustion chamber 30 is heated, and pyrolysis and combustion of the sample S are performed. In this case, when the heat of the combustion chamber 30 is transferred to the measurement scale 41, there is a fear of occurrence of a measurement error or failure due to damage of the measurement scale 41.

In order to prevent this, a fireproof wall 39 made of a heat insulating material is formed at the lower end of the combustion chamber 30 in contact with the housing 20, and a heat shielding cap 43 is provided between the sample holder 42 and the measurement scale 41. do.

The heat shield cap 43 includes a support part 431 having a predetermined thickness and a protrusion part 432 protruding from the center of the support part 431 to a predetermined width and height, and a sample on the upper side of the support part 431. Holder 42 is seated.

At this time, the heat shielding cap 43 is preferably formed of a material having a low heat transfer rate such as ceramic, and the protrusion 432 has a diameter slightly smaller than the diameter of the hollow 30a to be inserted into the hollow 30a of the combustion chamber 30. It is preferably formed, the support portion 431 is preferably formed with a diameter slightly smaller than the inner diameter of the fire-resistant wall (39).

In addition, at a predetermined interval between the outer circumferential surface of the protrusion 432 and the inner wall of the hollow 30a and between the outer circumferential surface of the support portion 431 and the inner wall of the fireproof wall 39 so as not to affect the measurement of the weight of the sample S. It is preferable that a gap is formed.

The lower center of the heat shield cap 43 is provided with a support 433 supporting the heat shield cap 43. That is, the support 433 is placed on the measuring unit provided with a piezoelectric element, a load cell, etc. in the electronic balance, and the support 433 supports the heat shielding cap 43 and the sample holder 42.

At this time, the upper edge of the measurement scale 41, it is preferable that the sealing ring 45 which is press-contacted to the lower end of the fire wall (39) when the measurement scale 41 is raised, the sealing ring 45 is Since the measurement scale 41 is provided to be spaced apart from the outside of the measurement unit by a predetermined distance, even if the sealing ring 45 is pressed to the lower end of the fire wall 39 does not affect the measurement of the weight of the sample (S).

Meanwhile, after the pyrolysis / combustion reaction of the sample S, the sample weight measuring device 40 is lowered to change the shape of the sample S contained in the sample holder 42 so that the transparent window 27 on the front of the housing 20 is changed. Can be observed through

According to one embodiment of the invention, a pretreatment unit of gas (50) is provided on one side of the housing (20), the measurement of the combustion gas flowing into the combustion gas analyzer (combustion gas analyzer) (60) Eliminates fine particles or water from interfering.

Here, the exhaust gas scrubber 50 includes a silica gel filter 52 and a glass wool filter 53 connected to each other, and the primary combustion gas collection pipe 37 or the secondary combustion. The combustion gas collected through the gas collection pipe 38 enters the exhaust gas measuring device 60 through an empty line 51, a silica gel filter 52, and a glass wool filter 53.

In this case, the empty tube 51 functions to uniformize combustion gas and remove particles separated from the silica gel filter 52 or the glass wool filter 53, and may be selectively installed as necessary. have.

On the other hand, the temperature control and monitoring device 70 measures the temperature of the primary and secondary combustion chambers 31 and 32, adjusts the designated heating rate and temperature, and measures the temperature, reaction time, weight of the sample, and combustion measured in real time. The gas concentration is recorded, stored, and displayed as a function of time and temperature, and data are presented to obtain various characteristic values (see Table 1) related to the reaction model of the sample (S) and the pyrolysis / combustion reaction.

5 is a photograph showing the state before and after the pyrolysis / combustion reaction of various waste samples according to an embodiment of the present invention, through the transparent window 27 can confirm the form of the sample (S) before and after the experiment, through the sample It can be distinguished whether the chemical reaction of (S) is a non-shrinking reaction or a shrinking reaction.

It was difficult to identify or find such a reaction by the conventional TGA for chemical analysis, but in the case of the present invention, as shown in FIG. 5, the char obtained by pyrolyzing the sludge showed a non-reduction reaction. In the case of waste noodles and mixed wastes, it can be seen that pyrolysis / combustion occurs due to the reduction reaction.

FIG. 6 is a graph showing weight loss curves of various wastes as a function of temperature and time using an incineration and pyrolysis simulator according to an embodiment of the present invention, and FIG. 7 is a conventional thermogravimetric analyzer for chemical analysis (TGA). ) Is a graph showing the weight loss curves of various wastes as a function of temperature and time.

6 and 7 show a thermogravimetric analyzer (TGA), which is currently used for thermogravimetric analysis, and an incineration and pyrolysis simulator 10 according to an embodiment of the present invention. As an example of comparative analysis of pyrolysis / combustion characteristics of a fuel sample, various pyrolysis / combustion reaction characteristics according to waste may be seen.

Here, comparing the thermal weight change of the RPF (Refuse Plastic Fuel; waste plastic), in the case of the incineration and pyrolysis simulator 10 according to an embodiment of the present invention at a heating rate of 3 ℃ / min, the first pyrolysis reaction In the form of Type I-1 (see FIG. 8), the TGA-air showed a similar pyrolysis / combustion reaction to the incineration and pyrolysis simulator 10, but the reaction was performed at a higher temperature than the incineration and pyrolysis simulator 10. You can see it happening.

On the other hand, at the heating rate of 10 ° C./min, the complex reaction also occurred in the incineration and pyrolysis simulator 10, and showed a linear weight loss rate, and the pyrolysis / combustion in the secondary reaction occurred in Type II-2. The form is shown.

In the TGA-air, a complex reaction such as incineration and pyrolysis simulator 10 was shown, and a reaction model of Type II-1 in which maximum pyrolysis occurred twice was shown.

That is, in the case of non-homogeneous fuel, if the pyrolysis / combustion reaction is determined by using the TGA data using a small amount (10 mg or less) of the sample, the accuracy of the data is inferior. It is difficult to get the correct value.

On the other hand, in the case of incineration and pyrolysis simulator 10 according to an embodiment of the present invention, it is possible to determine the reaction model for the heterogeneous fuel as shown in Figure 8, in each reaction as shown in Table 1 below The characteristic values that appear can be determined.

TABLE 1

Wherein a; (L) incineration and pyrolysis simulator according to an embodiment of the present invention,

b; (T) thermogravimetric analysis device (TGA) for chemical analysis,

L; Temperature range where weight loss occurs linearly,

T _o ; Starting temperature of pyrolysis / combustion reaction with 0.5 wt% loss of initial weight,

T _p ¹ , T _p ² ; Temperature with maximum weight loss rate in the first and second reactions,

T _f ; The final weight reduction temperature of the fuel,

W _pt ¹ , W _pt ² ; Maximum weight loss rate (wt% / min) of the first and second reactions,

W _pT ¹ , W _pT ² ; Maximum weight loss ratio (wt% / ℃) of the first and second reactions,

air and N ₂ ; It is the air and nitrogen atmosphere applied to the experiment in the thermogravimetric analyzer (TGA) for chemical analysis.

In order to determine the characteristics of the flue-gas generated during the pyrolysis / combustion process of the sample (fossil fuel, renewable fuel, etc.), the primary combustion function and the primary and secondary combustion functions according to one embodiment of the present invention are used. 9 and 10 show real-time flue gas concentration changes when using the

FIG. 9 is a graph showing a change in concentration of flue gas detected during pyrolytic combustion of char and RPF using only the primary combustion function.

9 (a) and 9 (b) show the amount of CO and C _x H _y generated according to the heating rate of the flue gas generated during pyrolysis / combustion of char, and the concentration of CO at a heating rate of 10 ° C./min Was the highest as 1,450ppm, 788ppm at 1 ℃ / min, 825ppm occurred at 3 ℃ / min.

The C _x H _y concentration, which represents the total concentration of hydrocarbon compounds in the flue gas, did not occur at 1 ° C / min, but was 0.02% and 0.06% at 3 ° C / min and 10 ° C / min, respectively, increasing the heating rate. As a result, C _x H _y occurs and increases.

This is because the decomposition rate increased from 0.3 wt% / min to 1.3 wt% / min depending on the heating rate, so that the pyrolysis product did not undergo sufficient secondary combustion reaction with air. It can be seen that a secondary combustion function is required.

(C) and (d) of FIG. 9 show concentrations according to heating rates of exhaust gases generated during pyrolysis / combustion of RPF, and CO concentrations are 1,914 ppm at 1 ° C./min and 3,013 ppm at 3 ° C./min. 5,878 ppm was generated at < RTI ID = 0.0 >

The CO concentration of RPF was higher as the heating rate increased. C _x H _y occurred at all heating rates and occurred highest at 0.54% at 3 ° C / min.

That is, as described above, according to the incineration and pyrolysis simulator 10 according to an embodiment of the present invention, in the case of char and RPF, the amount of CO generated by incomplete combustion increases as the heating rate increases, When the combustion atmosphere and the conditions are the same, as the weight increases, the amount of CO generated increases, so that the incomplete combustion product is generated.

FIG. 10 is a graph showing changes in concentrations of flue gas detected during pyrolytic combustion of char and RPF utilizing primary and secondary combustion functions.

As shown in Table 2 below, a large amount of incomplete combustion product was generated when only the primary combustion reaction was applied.

<Table 2>

At this time, ①; Primary pyrolysis / combustion function, ②; Primary / secondary pyrolysis / combustion function.

In order to determine the degree of generation of incomplete combustion products after the secondary combustion of such incomplete combustion products, analysis of the exhaust gas by adding a secondary combustion function according to an embodiment of the present invention, as shown in Table 2, In the case of char), the CO concentration generated by the first combustion was at least 788 ppm and the maximum was 1,450 ppm, but most of the CO was not generated by the first and second combustion, and almost no C _x H _y concentration was generated. Did not do it.

In the case of RPF, the CO concentration from primary combustion was measured as high as 1,914ppm to 5,878ppm, whereas the CO concentration was 65ppm and 183ppm at 3 ° C / min and 10 ° C / min, respectively. Occurred. C _x H _y was generated by the primary combustion, but not at all by the primary or secondary combustion.

That is, it can be seen that the incomplete combustion product generated in the primary combustion is completely burned or reduced in concentration by the secondary combustion.

This is because a lot of combustible gas is generated during the pyrolysis process, but it is judged that sufficient residence time and mixing of the combustion air are made by the secondary combustion process, and thus a condition that can be completely burned is formed, which leads to the first combustion. It can be seen that the concentration of CO, an incomplete combustion product generated by the gas, is rapidly reduced by secondary combustion.

That is, according to the incineration and pyrolysis simulator 10 according to an embodiment of the present invention, for a particular fuel, sufficient mixing of the combustible gas and combustion air generated during the pyrolysis process, and the secondary combustion time (legal standard: 2sec It is possible to judge whether or not the design of the energy-generation facility considering the secondary combustion process is necessary, such as the design of the combustion chamber volume that can secure enough).

S: sample
10: incineration and pyrolysis simulator
20: housing 27: transparent window
30 combustion chamber 31 primary combustion chamber
32: secondary combustion chamber 34: temperature sensor
35: primary atmosphere gas injection pipe 36: secondary atmosphere gas injection pipe
37: 1st combustion gas collection pipe 38: 2nd combustion gas collection pipe
40: sample weight measuring device 41: measuring scale
42: sample holder 43: heat shield cap
44: lead screw 45: sealing ring
50: flue gas scrubber 51: empty tube
52: silica gel filter 53: glass wool filter
60: flue gas measuring device
70: temperature control and monitoring device

Claims (8)

A housing having a space provided therein;
A combustion chamber installed at an upper portion of the housing and having a hollow communicating therewith; And
Incineration and pyrolysis simulator comprising: a sample weight measuring device which is installed to be elevated in the space portion of the housing, for measuring the weight change of the sample to be burned in the combustion chamber.
The method according to claim 1,
Incineration and pyrolysis simulator, characterized in that the transparent portion is provided on one side of the housing to observe the space.
The method according to claim 1,
The combustion chamber comprises a lower primary combustion chamber and an upper secondary combustion chamber, wherein the boundary between the primary combustion chamber and the secondary combustion chamber is partitioned by an inner wall in the form of a nozzle.
The method according to claim 3,
An incineration and pyrolysis simulator, characterized in that the primary combustion gas collecting tube is provided on the upper side of the primary combustion chamber, and the secondary combustion gas collecting tube is provided on the upper side of the secondary combustion chamber.
The method of claim 1, wherein the sample weight measuring device,
A measurement scale for lifting the sample and measuring the weight of the sample, a sample holder provided on the upper portion of the measurement scale, and containing the sample, and provided between the sample holder and the measurement scale to transfer heat from the combustion chamber to the space portion. Incineration and pyrolysis simulator, characterized in that it comprises a heat shield cap for blocking the, and a sealing ring provided along the upper edge of the electronic balance.
The method according to claim 5,
Incineration and pyrolysis simulator, characterized in that at least one atmosphere gas injection tube is provided in the lower portion of the combustion chamber.
The method of claim 6,
At least one pair of the atmosphere gas injection tube is spaced apart from each other in the circumferential direction in the lower portion of the combustion chamber, the adjacent pair is incineration and pyrolysis simulator, characterized in that the diameter and incident angle are different from each other.
The method of claim 4,
An exhaust gas scrubber connected to the primary combustion gas collecting tube or the secondary combustion gas collecting tube and configured to clean the combustion gas by using a silica gel filter and a glass wool filter is provided at one side of the housing. Incineration and pyrolysis simulator, characterized in that provided.

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