Flue gas cooling and purifying device based on test coke oven

Abstract

The invention provides a flue gas cooling and purifying device based on a test coke oven, the flue gas cooling and purifying device comprises a flue gas combustion mechanism, a tar condensation mechanism and a spraying dust removal mechanism, the flue gas combustion mechanism can combust combustible substances in flue gas, and the input end of the flue gas combustion mechanism is connected with the output end of the test coke oven; the tar condensation mechanism can condense tar in smoke, the input end of the tar condensation mechanism is connected with the output end of the smoke combustion mechanism, the spraying dust removal mechanism can remove dust from the smoke, and the spraying dust removal mechanism is installed at the output end of the tar condensation mechanism. Compared with the prior art, the problem that a filtering device is blocked does not exist, the condensed tar does not need to be manually treated, meanwhile, the process is simpler, and the cost is lower.

Description

Technical Field

[0001] The invention relates to the technical field of coking test coke ovens, and in particular to a flue gas cooling and purification device based on a test coke oven. Background Art

[0002] At present, in the process of experimental coke oven flue gas treatment, two processes are generally used: one is the process of cooling to remove tar first and then burning. This process uses a shell-and-tube condenser to condense the tar, which has problems such as easy clogging of the filter device and the trouble of manual handling of the tar after condensation; the other is the process of burning first and then cooling. The condensing device in this process uses a heat exchanger and a refrigerant, so its process is relatively complicated and the cost is relatively high. Summary of the invention

[0003] According to the technical problems raised above, a flue gas cooling and purification device based on an experimental coke oven is provided.

[0004] The technical means adopted by the present invention are as follows:

[0005] A flue gas cooling and purification device based on an experimental coke oven comprises: a flue gas combustion mechanism; the flue gas combustion mechanism can burn combustible substances in the flue gas, and the input end of the flue gas combustion mechanism is connected to the output end of the experimental coke oven; a tar condensing mechanism; the tar condensing mechanism can condense tar in the flue gas, and the input end of the tar condensing mechanism is connected to the output end of the flue gas combustion mechanism; a spraying dust removal mechanism; the spraying dust removal mechanism can remove dust from the flue gas, and the spraying dust removal mechanism is installed on the output end of the tar condensing mechanism.

[0006] Furthermore, the smoke combustion mechanism includes a smoke combustion chamber and a smoke igniter; the smoke combustion chamber is provided with a combustion chamber smoke inlet and a combustion chamber smoke outlet which are connected to the smoke combustion chamber, the combustion chamber smoke inlet is located on the side of the smoke combustion chamber, and the combustion chamber smoke outlet is located on the top surface of the smoke combustion chamber; the smoke igniter is installed in the smoke combustion chamber; the combustion chamber smoke inlet is the input end of the smoke combustion mechanism, and the combustion chamber smoke outlet is the output end of the smoke combustion mechanism.

[0007] Furthermore, air vents are provided on the bottom and side surfaces of the smoke combustion chamber; and air dampers are installed in the air vents.

[0008] Furthermore, the condensing tar mechanism includes a condensing tar chamber, an annular cooling water pipe, a water storage tank and a condensing machine; the condensing tar chamber is provided with a tar chamber smoke inlet and a tar chamber smoke outlet which are connected to the condensing tar chamber, the tar chamber smoke inlet is located on the bottom surface of the condensing tar chamber, and the tar chamber smoke outlet is located on the top surface of the condensing tar chamber; the annular cooling water pipe surrounds the outside of the condensing tar chamber and fits the side of the condensing tar chamber; the input end of the water storage tank is connected to the output end of the annular cooling water pipe; the input end of the condensing machine is connected to the output end of the water storage tank, and the output end of the condensing machine is connected to the input end of the annular cooling water pipe; the condensing tar chamber is located above the flue gas combustion chamber, the tar chamber smoke inlet is the input end of the condensing tar mechanism, and the tar chamber smoke outlet is the output end of the condensing tar mechanism.

[0009] Furthermore, it also includes an exhaust fan, a first smoke pipe and a second smoke pipe; the exhaust fan is located below the smoke outlet of the tar chamber; the first smoke pipe includes an upper horizontal pipe section, a middle vertical pipe section and a lower horizontal pipe section, the input end of the middle vertical pipe section is connected to the output end of the upper horizontal pipe section, the input end of the lower horizontal pipe section is connected to the middle vertical pipe section, the output end of the middle vertical pipe section is located below the input end of the lower horizontal pipe section, and the output end of the lower horizontal pipe section is connected to the input end of the exhaust fan; the input end of the second smoke pipe is connected to the output end of the exhaust fan; the input end of the upper horizontal pipe section is connected to the smoke outlet of the tar chamber.

[0010] Furthermore, the spraying dust removal mechanism includes a dust washing water tank, a dust washing water pump, a nozzle water inlet pipe and a nozzle; the dust washing water tank is provided with a water tank output port and a water tank input port which are connected to the dust washing water tank; the input end of the dust washing water pump is connected to the water tank output port; the input end of the nozzle water inlet pipe is connected to the output end of the dust washing water pump; the input end of the nozzle is connected to the output end of the nozzle water inlet pipe; the nozzle is installed on the part of the middle vertical pipe section between the upper horizontal pipe section and the lower horizontal pipe section, and the water tank input port is connected to the output end of the middle vertical pipe section.

[0011] Furthermore, it also includes a lower orifice plate, and a plurality of fixing plates are installed on the part between the top and bottom ends of the lower horizontal pipe section in the middle vertical pipe section; the lower orifice plate is detachably installed on the fixing plate, and the heights of any two fixing plates are different.

[0012] Furthermore, it also includes an upper orifice plate; the upper orifice plate is installed on the part of the middle vertical pipe section located above the nozzle.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. In the present invention, the flue gas output from the test coke oven first enters the flue gas combustion mechanism, which will burn the combustible substances in the flue gas. After removing most of the combustible substances such as tar, hydrogen and alkanes in the flue gas, the flue gas in the flue gas combustion mechanism enters the condensing tar mechanism, which will condense the remaining tar in the flue gas. After removing all the tar in the flue gas, the flue gas in the condensing tar mechanism enters the spraying dust removal mechanism, which will spray water on the flue gas to absorb dust. After the dust removal of the flue gas is completed, the cooling and purification of the flue gas is completed. Compared with the prior art, the present invention does not have the problem of clogging of the filter device, and does not need to manually handle the condensed tar. At the same time, the process is simpler and the cost is lower.

[0015] 2. In the present invention, after the flue gas outputted from the experimental coke oven enters the flue gas combustion chamber, the flue gas igniter works to burn the combustible substances in the flue gas, thereby removing most of the combustible substances such as tar, hydrogen and alkanes in the flue gas.

[0016] 3. In the present invention, the air outside the smoke combustion chamber can enter the smoke combustion chamber through the damper and the air outlet to ensure the air content in the smoke combustion chamber and ensure that the combustible materials in the smoke can be fully burned.

[0017] 4. In the present invention, the annular cooling water pipe surrounds the outside of the condensing tar chamber and fits against the side of the condensing tar chamber, so as to condense the remaining tar in the flue gas; at the same time, the condensed water starts from the water tank and returns to the water tank through the condenser and the annular cooling water pipe in sequence, so as to realize the recycling of the condensed water; by adding condensed water to the water tank, the condensing tar mechanism can maintain a normal working state.

[0018] 5. In the present invention, the flue gas output by the tar condensing mechanism is discharged through the first smoke pipe and the second smoke pipe in sequence under the action of the exhaust fan.

[0019] 6. In the present invention, the dust washing water in the dust washing water tank enters the nozzle through the nozzle water inlet pipe under the action of the dust washing water pump, and the nozzle sprays the dust washing water in the middle vertical pipe section to spray water and absorb dust on the flue gas in the middle vertical pipe section; at the same time, the dust washing water in the middle vertical pipe section enters the dust washing water tank through the output end of the middle vertical pipe section and the water tank inlet, so as to realize the recycling of dust washing water; by adding dust washing water to the dust washing water tank, the spraying dust removal mechanism can maintain a normal working state.

[0020] 7. In the present invention, after the dust washing water drops onto the lower orifice plate, a water film will be formed in the holes of the lower orifice plate, which plays a role in isolating the smoke.

[0021] 8. In the present invention, the upper perforated plate plays a role in evenly distributing the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a right side view of a flue gas cooling and purification device based on a test coke oven in Example 1 of the present invention;

[0024] Figure 2 It is a front view of a flue gas cooling and purification device based on a test coke oven in Example 1 of the present invention;

[0025] Figure 3 It is a rear view of a flue gas cooling and purification device based on a test coke oven in Example 1 of the present invention;

[0026] Figure 4 This is an overall structural diagram of the tar condensation mechanism in Example 1 of the present invention;

[0027] Figure 5 This is an overall structural diagram of the nozzle water inlet pipe, the nozzle, the baffle, the upper orifice plate, the lower orifice plate, the middle vertical pipe section and the lower horizontal pipe section in Example 1 of the present invention;

[0028] Figure 6 This is the overall structural diagram of the upper orifice plate in Example 1 of the present invention;

[0029] Figure 7 This is the overall structural diagram of the lower orifice plate in Example 1 of the present invention;

[0030] In the figure: 1- flue gas combustion mechanism; 2- condensing tar mechanism; 3- gate valve; 4- second flue pipe; 5- first flue pipe; 6- spraying dust removal mechanism; 7- exhaust fan; 8- flue gas inlet pipe; 9- baffle; 10- fixed plate; 11- upper orifice plate; 12- lower orifice plate; 101- flue gas combustion chamber; 102- flue gas igniter; 103- secondary air door; 104- primary air door; 201- annular cooling water pipe; 202- water storage tank; 203- condenser; 204- condensing tar chamber; 501- upper horizontal pipe section; 502- middle vertical pipe section; 503- lower horizontal pipe section; 601- nozzle; 602- nozzle water inlet pipe; 603- dust washing water pump; 604- dust washing water tank. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0036] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0037] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] like Figures 1 to 7 As shown, a flue gas cooling and purification device based on an experimental coke oven comprises: a flue gas combustion mechanism 1; the flue gas combustion mechanism 1 can burn combustible substances in the flue gas, and the input end of the flue gas combustion mechanism 1 is connected to the output end of the experimental coke oven; a tar condensing mechanism 2; the tar condensing mechanism 2 can condense tar in the flue gas, and the input end of the tar condensing mechanism 2 is connected to the output end of the flue gas combustion mechanism 1; a spraying dust removal mechanism 6; the spraying dust removal mechanism 6 can remove dust from the flue gas, and the spraying dust removal mechanism 6 is installed on the output end of the tar condensing mechanism 2.

[0040] Specifically, the input end of the flue gas combustion mechanism 1 and the output end of the test coke oven are connected together through a flue gas introduction pipe 8 .

[0041] In the present embodiment, the smoke combustion mechanism 1 comprises a smoke combustion chamber 101 and a smoke igniter 102; the smoke combustion chamber 101 is provided with a combustion chamber smoke inlet and a combustion chamber smoke outlet which are connected to the smoke combustion chamber 101, the combustion chamber smoke inlet is located on the side of the smoke combustion chamber 101, and the combustion chamber smoke outlet is located on the top surface of the smoke combustion chamber 101; the smoke igniter 102 is installed in the smoke combustion chamber 101; the combustion chamber smoke inlet is the input end of the smoke combustion mechanism 1, and the combustion chamber smoke outlet is the output end of the smoke combustion mechanism 1. The smoke igniter 102 in the present embodiment is a prior art in the field and will not be elaborated herein.

[0042] In this embodiment, air vents are provided on the bottom and side surfaces of the smoke combustion chamber 101; and dampers are installed in the air vents.

[0043] Specifically, the air inlet includes a primary air inlet and a secondary air inlet, the primary air inlet is located on the bottom surface of the smoke combustion chamber 101, and the secondary air inlet is located on the side of the smoke combustion chamber 101; the damper includes a primary air damper 104 and a secondary air damper 103, the primary air damper 104 is installed in the primary air inlet, and the secondary air damper 103 is installed in the secondary air inlet. The primary air damper 104 and the secondary air damper 103 in this embodiment are prior arts in the field and are not described herein.

[0044] In this embodiment, the condensing tar mechanism 2 includes a condensing tar chamber 204, an annular cooling water pipe 201, a water tank 202 and a condensing machine 203; the condensing tar chamber 204 is provided with a tar chamber smoke inlet and a tar chamber smoke outlet which are connected to the condensing tar chamber 204, the tar chamber smoke inlet is located on the bottom surface of the condensing tar chamber 204, and the tar chamber smoke outlet is located on the top surface of the condensing tar chamber 204; the annular cooling water pipe 201 surrounds the outside of the condensing tar chamber 204 and is connected to the cooling water pipe 201. The side of the condensing tar chamber 204 is fitted; the input end of the water tank 202 is connected to the output end of the annular cooling water pipe 201; the input end of the condensing machine 203 is connected to the output end of the water tank 202, and the output end of the condensing machine 203 is connected to the input end of the annular cooling water pipe 201; the condensing tar chamber 204 is located above the flue gas combustion chamber 101, the tar chamber smoke inlet is the input end of the condensing tar mechanism 2, and the tar chamber smoke outlet is the output end of the condensing tar mechanism 2.

[0045] In this embodiment, it also includes an exhaust fan 7, a first smoke pipe 5 and a second smoke pipe 4; the exhaust fan 7 is located below the smoke outlet of the tar chamber; the first smoke pipe 5 includes an upper horizontal pipe section 501, a middle vertical pipe section 502 and a lower horizontal pipe section 503, the input end of the middle vertical pipe section 502 is connected to the output end of the upper horizontal pipe section 501, the input end of the lower horizontal pipe section 503 is connected to the middle vertical pipe section 502, the output end of the middle vertical pipe section 502 is located below the input end of the lower horizontal pipe section 503, and the output end of the lower horizontal pipe section 503 is connected to the input end of the exhaust fan 7; the input end of the second smoke pipe 4 is connected to the output end of the exhaust fan 7; the input end of the upper horizontal pipe section 501 is connected to the smoke outlet of the tar chamber.

[0046] Specifically, the first smoke pipe 5 is connected to the second smoke pipe 4 through a third smoke pipe, and a gate valve 3 is installed on the third smoke pipe.

[0047] In this embodiment, the spraying dust removal mechanism 6 includes a dust washing water tank 604, a dust washing water pump 603, a nozzle water inlet pipe 602 and a nozzle 601; the dust washing water tank 604 is provided with a water tank output port and a water tank input port connected to the dust washing water tank 604; the input end of the dust washing water pump 603 is connected to the water tank output port; the input end of the nozzle water inlet pipe 602 is connected to the output end of the dust washing water pump 603; the input end of the nozzle 601 is connected to the output end of the nozzle water inlet pipe 602; the nozzle 601 is installed in the middle vertical pipe section 502 between the upper horizontal pipe section 501 and the lower horizontal pipe section 503, and the water tank input port is connected to the output end of the middle vertical pipe section 502.

[0048] In this embodiment, a lower orifice plate 12 is also included, and a plurality of fixed plates 10 are installed on the portion of the middle vertical pipe section 502 between the top and bottom ends of the lower horizontal pipe section 503; the lower orifice plate 12 is detachably installed on the fixed plates 10, and the heights of any two fixed plates 10 are different.

[0049] Specifically, two fixed plates 10 are provided. When the lower orifice plate 12 is installed on the fixed plate 10 with a higher height, the flow rate of flue gas in the first smoke pipe 5 is smaller, which is suitable for the case where the amount of dry coal loaded into the test coke oven is less than or equal to 60 kg; when the lower orifice plate 12 is installed on the fixed plate 10 with a lower height, the flow rate of flue gas in the first smoke pipe 5 is larger, which is suitable for the case where the amount of dry coal loaded into the test coke oven is greater than 60 kg and less than 100 kg.

[0050] In addition, a baffle 9 is installed on the portion of the middle vertical pipe section 502 between the nozzle 601 and the fixing plate 10 .

[0051] In this embodiment, an upper orifice plate 11 is further included; the upper orifice plate 11 is installed on the portion of the middle vertical pipe section 502 located above the nozzle 601 .

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flue gas cooling and purification device based on a test coke oven, characterized in that: include: A flue gas combustion mechanism (1); the flue gas combustion mechanism (1) can burn combustible substances in the flue gas, and the input end of the flue gas combustion mechanism (1) is connected to the output end of the test coke oven; A tar condensing mechanism (2); the tar condensing mechanism (2) can condense tar in the flue gas, and the input end of the tar condensing mechanism (2) is connected to the output end of the flue gas combustion mechanism (1); A spraying dust removal mechanism (6); the spraying dust removal mechanism (6) can remove dust from flue gas, and the spraying dust removal mechanism (6) is installed on the output end of the condensing tar mechanism (2).

2. A flue gas cooling and purification device based on a test coke oven according to claim 1, characterized in that: The smoke combustion mechanism (1) comprises a smoke combustion chamber (101) and a smoke igniter (102); The smoke combustion chamber (101) is provided with a combustion chamber smoke inlet and a combustion chamber smoke outlet which are in communication with the smoke combustion chamber (101); the combustion chamber smoke inlet is located on a side surface of the smoke combustion chamber (101), and the combustion chamber smoke outlet is located on a top surface of the smoke combustion chamber (101); The smoke igniter (102) is installed in the smoke combustion chamber (101); The combustion chamber smoke inlet is the input end of the smoke combustion mechanism (1), and the combustion chamber smoke outlet is the output end of the smoke combustion mechanism (1).

3. A flue gas cooling and purification device based on a test coke oven according to claim 2, characterized in that: The bottom and side surfaces of the smoke combustion chamber (101) are provided with air vents; A damper is installed in the air outlet.

4. A flue gas cooling and purification device based on a test coke oven according to claim 2, characterized in that: The tar condensing mechanism (2) comprises a tar condensing chamber (204), an annular cooling water pipe (201), a water storage tank (202) and a condenser (203); The condensing tar chamber (204) is provided with a tar chamber smoke inlet and a tar chamber smoke outlet which are in communication with the condensing tar chamber (204), the tar chamber smoke inlet is located on the bottom surface of the condensing tar chamber (204), and the tar chamber smoke outlet is located on the top surface of the condensing tar chamber (204); The annular cooling water pipe (201) surrounds the outside of the condensing tar chamber (204) and fits against the side surface of the condensing tar chamber (204); The input end of the water storage tank (202) is connected to the output end of the annular cooling water pipe (201); The input end of the condenser (203) is connected to the output end of the water storage tank (202), and the output end of the condenser (203) is connected to the input end of the annular cooling water pipe (201); The condensing tar chamber (204) is located above the smoke combustion chamber (101), the smoke inlet of the tar chamber is the input end of the condensing tar mechanism (2), and the smoke outlet of the tar chamber is the output end of the condensing tar mechanism (2).

5. A flue gas cooling and purification device based on a test coke oven according to claim 4, characterized in that: It also includes an exhaust fan (7), a first smoke pipe (5) and a second smoke pipe (4); The exhaust fan (7) is located below the smoke outlet of the tar chamber; The first smoke pipe (5) comprises an upper horizontal pipe section (501), a middle vertical pipe section (502) and a lower horizontal pipe section (503); the input end of the middle vertical pipe section (502) is connected to the output end of the upper horizontal pipe section (501); the input end of the lower horizontal pipe section (503) is connected to the middle vertical pipe section (502); the output end of the middle vertical pipe section (502) is located below the input end of the lower horizontal pipe section (503); and the output end of the lower horizontal pipe section (503) is connected to the input end of the exhaust fan (7); The input end of the second smoke pipe (4) is connected to the output end of the exhaust fan (7); The input end of the upper horizontal pipe section (501) is connected to the smoke outlet of the tar chamber.

6. A flue gas cooling and purification device based on a test coke oven according to claim 5, characterized in that: The spraying dust removal mechanism (6) comprises a dust washing water tank (604), a dust washing water pump (603), a nozzle water inlet pipe (602) and a nozzle (601); The dust washing water tank (604) is provided with a water tank output port and a water tank input port which are in communication with the dust washing water tank (604); The input end of the dust washing water pump (603) is connected to the output port of the water tank; The input end of the nozzle water inlet pipe (602) is connected to the output end of the dust washing water pump (603); The input end of the nozzle (601) is connected to the output end of the nozzle water inlet pipe (602); The nozzle (601) is installed on the portion of the middle vertical pipe section (502) between the upper horizontal pipe section (501) and the lower horizontal pipe section (503), and the water tank inlet is connected to the output end of the middle vertical pipe section (502).

7. A flue gas cooling and purification device based on a test coke oven according to claim 6, characterized in that: It also includes a lower orifice plate (12), and a plurality of fixing plates (10) are installed on the portion of the middle vertical pipe section (502) located between the top and bottom ends of the lower horizontal pipe section (503); The lower orifice plate (12) is detachably mounted on the fixed plate (10), and the heights of any two fixed plates (10) are different from each other.

8. The flue gas cooling and purification device based on the experimental coke oven according to claim 6, characterized in that: Also includes an upper orifice plate (11); The upper orifice plate (11) is installed on the portion of the middle vertical pipe section (502) located above the spray head (601).

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