Center burner and incineration treatment device

Abstract

The invention discloses a center burner which comprises a first mounting seat and a center spray gun arranged on the first mounting seat, and the center spray gun comprises a center waste liquid spray pipe with a spray end close to a first gas outlet; the central gas pipe is arranged on the outer side of the central waste liquid spraying pipe in a sleeving manner, and a gas channel is reserved between the inner wall of the central gas pipe and the outer wall of the central waste liquid spraying pipe; the central waste gas pipe is arranged on the outer side of the central gas pipe in a sleeving mode, and a waste gas channel is reserved between the inner wall of the central waste gas pipe and the outer wall of the central gas pipe; wherein the center waste gas pipe is provided with a waste gas exhaust port, the waste gas exhaust port is annularly arranged in the circumferential direction of the spraying end, the temperature of waste gas exhausted by the waste gas exhaust port is T center waste gas, the combustion temperature of an outlet of the center gas pipe is T center gas, and the absolute value of the difference value between the T center waste gas and the T center gas is smaller than a preset threshold value. According to the technical scheme, the stability of a combustion area can be guaranteed, and generation of thermal NOx is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas and waste liquid treatment, and in particular to a central burner and an incineration treatment device. Background Art

[0002] Industrial production usually emits a large amount of pollutants. In some chemical fields, nitrogen-containing and amino-containing organic waste gas and waste liquid are common wastes, and direct discharge will cause serious pollution to the environment.

[0003] At present, the main methods for treating nitrogen-containing and amino-containing waste gas and waste liquid include thermal oxidation incineration, ammonia absorption method and catalyst catalytic reduction method. Among them, the characteristics of thermal oxidation incineration are: nitrogen-containing waste gas and waste liquid are oxidized and decomposed into inorganic small molecules under the condition of being greater than the set temperature, and after waste heat recovery and flue gas purification, they become harmless components such as C02, H20, N2 and are discharged into the atmosphere.

[0004] However, the sources of waste gas and waste liquid are very complex, especially the temperature of each component input at different times varies greatly. When waste gas and waste liquid with large temperature fluctuations come into contact with the burning flame during heat treatment, it is easy to cause unstable flame temperature, resulting in the treatment effect not meeting expectations.

[0005] Application Contents

[0006] The present application provides a central burner and an incineration treatment device, so as to provide a more stable central flame when treating nitrogen-containing waste gas and waste liquid by thermal oxidation method, thereby improving the stability of waste gas and waste liquid treatment.

[0007] A central burner comprises: a first mounting seat, comprising a first mounting tube and a first mounting plate covering one axial end of the first mounting tube, the first mounting tube having a first cavity and a first air outlet facing away from the first mounting plate, the outer wall of the first mounting tube being connected to a first air inlet channel; a central spray gun, axially penetratingly arranged on the first mounting plate, the central spray gun comprising: a central waste liquid spray pipe having a spray end close to the first air outlet; a central gas pipe, sleeved on the outer side of the central waste liquid spray pipe, a gas channel being left between the inner wall of the central gas pipe and the outer wall of the central waste liquid spray pipe; and a central exhaust gas pipe, sleeved on the outer side of the central gas pipe, an exhaust gas channel being left between the inner wall of the central exhaust gas pipe and the outer wall of the central gas pipe; wherein the central exhaust gas pipe has an exhaust gas outlet, the exhaust gas outlet is annularly arranged in the circumference of the spray end, and the exhaust gas temperature discharged from the exhaust gas outlet is T 中心废气 , the outlet combustion temperature of the central gas pipe is T 中心燃气 , satisfying T 中心废气 With T 中心燃气 The absolute value of the difference between them is less than a predetermined threshold.

[0008] In the embodiment of the present application, the gas ejected from the central gas pipe forms a central combustion area under the action of the igniter. It is understandable that the flame temperature of the central combustion area needs to be kept stable in order to more stably and reliably treat the waste gas and waste liquid. Therefore, how to ensure the stability of the central combustion area is more critical. In the embodiment of the present application, a central exhaust pipe is set outside the central waste liquid spray pipe for exhaust. First, the exhaust temperature of the central exhaust pipe is set. The temperature T 中心废气 The temperature T of the central combustion area 中心燃气 The difference between them is within a predetermined range, and the temperature fluctuation of the exhaust gas discharge is small, which can effectively reduce the impact of temperature fluctuations on the central combustion area during exhaust gas treatment. When the temperature fluctuation of the waste liquid discharged from the central waste liquid is large, since the temperature of the exhaust gas discharged from the central exhaust pipe also has a high calorific value, the area formed by the exhaust gas spraying can serve as a buffer zone for the central combustion area. For example, when the calorific value of the waste liquid is large, the heat in the central combustion area will be transferred to the exhaust gas area, thereby avoiding excessive temperature concentration. When the calorific value of the waste liquid is reduced, the heat in the exhaust gas area can provide a certain amount of heat supplement to the central combustion area, thereby forming a supplementary effect on the central combustion area. Furthermore, the exhaust gas discharged from the central exhaust pipe is arranged in a ring shape on the surrounding side of the central combustion area, thereby forming a temperature barrier, which can reduce the impact of temperature fluctuations outside the temperature barrier on the flame in the central combustion area, thereby ensuring the stability of the temperature in the central combustion area and improving the treatment effect of exhaust gas and waste liquid.

[0009] As one of the optional embodiments of the present application, the central exhaust pipe includes a main pipe and a branch pipe that are interconnected. The main pipe is sleeved on the outside of the central waste liquid spray pipe. The inner wall of one end of the main pipe close to the first air outlet is sealed with the outside of the central waste liquid spray pipe. The branch pipe is arranged in a ring shape on the outer wall of the main pipe. One end of the branch pipe is connected to the main pipe, and the outlet at the other end of the branch pipe forms an exhaust outlet.

[0010] In an embodiment of the present application, the central exhaust pipe is formed by a structure of a main pipe and a branch pipe, and a gap is formed between the exhaust outlets of the branch pipes, so that the exhaust outlets will not completely shield the central combustion area while forming a temperature barrier, thereby ensuring the temperature radiation of the central combustion area to other areas.

[0011] As one of the optional embodiments of the present application, the central waste liquid spray pipe includes: a central waste liquid pipe, extending axially; a central sleeve, sleeved on the outside of the central waste liquid pipe, a spray medium channel is left between the central sleeve and the outer wall of the central waste liquid pipe, and a spray medium inlet is provided on the central sleeve.

[0012] In an embodiment of the present application, a specific structure of a central waste liquid spray pipe is proposed, wherein waste liquid enters the central waste liquid pipe, and spray medium enters the spray medium channel and is sprayed out, thereby hitting the waste liquid to achieve a spray effect.

[0013] As one of the optional embodiments of the present application, the central spray gun also includes a cooling pipe, which is sleeved on the outside of the central sleeve, and a cooling channel is formed between the cooling pipe and the outer wall of the central sleeve. The central gas pipe is sleeved on the outside of the cooling pipe, and the end of the central gas pipe located in the first cavity is bent toward the outer wall of the cooling pipe to form a bent portion, and the inner peripheral side wall of the bent portion is in sealing contact with the outer wall of the cooling pipe. A central gas hole for gas to flow out is opened on the bent portion, and the cooling pipe located on the outside of the first cavity is connected to a cooling air joint.

[0014] In the embodiment of the present application, cooling air enters into the cooling channel from the cooling air joint, thereby cooling the central waste liquid spray pipe and the central exhaust gas pipe in operation to ensure stable operation.

[0015] As one of the optional embodiments of the present application, a first flange is provided at one end of the cooling pipe located outside the first cavity, and a first flange is provided on the outside of the central waste liquid spray pipe. The first flange is bolted to the second flange so that the central waste liquid spray pipe can be disassembled and connected to the cooling pipe.

[0016] In the embodiment of the present application, the central waste liquid spray pipe can be easily removed from the cooling pipe, which greatly facilitates the inspection and maintenance work, thereby ensuring the smooth and safe progress of the heat treatment.

[0017] As one of the optional embodiments of the present application, it also includes a flame stabilizing disk, which is sleeved on the outside of the central exhaust pipe, and a spacing space is left between the outer peripheral side of the flame stabilizing disk and the inner wall of the first mounting tube. The flame stabilizing disk is provided with a plurality of flame stabilizing holes that penetrate along the axial direction, and the plurality of flame stabilizing holes are arranged along the circumferential direction, wherein the flow area of ​​the spacing space is S1, and the flow area of ​​the plurality of flame stabilizing holes is S2, satisfying S1≥S2.

[0018] In the embodiment of the present application, the air entering the first mounting tube enters the vicinity of the nozzle of the central gas pipe through the flame stabilizing holes on the flame stabilizing disk, thereby mixing with the gas and burning. The flame stabilizing disk can control the contact amount between air and gas. When the air volume is large, since S1 ≥ S2, the air preferentially passes through the interval space rather than the flame stabilizing holes, which is beneficial to maintaining the amount of air in contact with the gas, thereby maintaining the combustion stability of the flame in the central area and reducing fluctuations.

[0019] As one of the optional embodiments of the present application, it also includes a plurality of inner ring spray guns, which are axially arranged on the first mounting plate, and are arranged on the peripheral side of the central spray gun. The inner ring spray gun includes an inner ring waste liquid spray pipe, and the spray port of the inner ring waste liquid spray pipe is arranged on the outer peripheral side of the flame stabilizing disk.

[0020] As one of the optional embodiments of the present application, the inner circle spray gun also includes a cooling jacket, which is arranged on the outer wall of the inner circle waste liquid spray pipe, and a cooling cavity is left between the cooling jacket and the outer wall of the inner circle waste liquid spray pipe. A connecting hole is opened on the cooling jacket for connecting the cooling cavity and the first cavity.

[0021] As one of the optional embodiments of the present application, it also includes a second mounting seat, the second mounting seat includes a second mounting tube mounted on the outside of the first mounting seat and a second mounting plate arranged at one end of the second mounting tube close to the first mounting plate, a second cavity is formed between the inner wall of the second mounting tube and the outer wall of the first mounting tube, the central burner also includes an outer ring spray gun, the outer ring exhaust gas spray gun is arranged in a circular shape on the second mounting plate, and the outer ring spray gun includes an outer ring waste liquid spray pipe.

[0022] In an embodiment of the present application, during waste liquid treatment, the waste liquid is divided into three levels and enters the burner, which can perform more detailed temperature grading of the waste liquid, so that the temperature of the waste liquid matches the temperature of the combustion area, thereby avoiding the influence of the waste liquid with large fluctuations on the combustion temperature. After the waste liquid is divided into three levels, the uniformity of the waste liquid distribution can be effectively improved, and the temperature impact on the combustion area caused by the concentrated input of waste liquid can be further reduced.

[0023] As one of the optional embodiments of the present application, it also includes an outer ring gas pipe, which includes: an annular pipe, surrounding the outer side of one end of the first mounting pipe away from the first mounting plate; an outer ring gas supply pipe, the outer ring gas supply pipe axially penetrates the second mounting plate, one end of the outer ring gas supply pipe is connected to the annular pipe; and a plurality of outer ring branch pipes, the outer ring branch pipes are all connected to the annular pipe, and the outer ring branch pipes are arranged in a ring shape on the circumference of the first mounting pipe.

[0024] In the embodiment of the present application, a grading is formed between the outer ring gas pipe and the central gas pipe, and the gas is evenly dispersed in the first cavity and the second cavity, which avoids the combustion temperature being too concentrated, thereby causing the generation of fuel-type NOx. It can be understood that nitrogen-containing organic waste gas and waste liquid mainly exist in the organic waste gas and waste liquid in the form of -CN and -NH2. When the nitrogen-containing waste gas and waste liquid are treated by thermal oxidation, a large amount of fuel-type NOx is easily generated. Fuel-type NOx is harmful to the environment and human health. And the important influencing factor affecting the generation of fuel-type NOx gas is temperature. The higher the temperature, the easier it is to generate fuel-type NOx. Therefore, dispersing the gas can help improve the uniformity of combustion distribution, avoid excessive concentration of combustion temperature, and thus reduce the generation of fuel-type NOx. The temperature provided by the outer ring gas pipe is blocked by the first mounting pipe and the temperature barrier, which further reduces the temperature influence of the outer ring combustion area on the central combustion area and ensures the stability of the combustion temperature in the central combustion area.

[0025] As one of the optional embodiments of the present application, it also includes a shell, which is covered on the outside of the second mounting tube, and a second air inlet channel is arranged on the shell, and a second air inlet is arranged on the second mounting tube.

[0026] A combustion device comprises: a furnace having a combustion chamber and a top cover plate; and the above-mentioned central burner, which is arranged at the center position of the top cover plate.

[0027] One of the above technical solutions has the following advantages or beneficial effects: the gas sprayed from the central gas pipe forms a central combustion area under the action of the igniter. It is understandable that the flame temperature of the central combustion area needs to be kept stable in order to more stably and reliably treat the waste gas and waste liquid. Therefore, how to ensure the stability of the central combustion area is more critical. In the embodiment of the present application, a central exhaust pipe is set outside the central waste liquid spray pipe for exhaust. First, the exhaust temperature of the central exhaust pipe is set. The temperature T 中心废气 The temperature T of the central combustion area 中心燃气 The difference between them is within a predetermined range, and the temperature fluctuation of the exhaust gas discharge is small, which can effectively reduce the impact of temperature fluctuations on the central combustion area during exhaust gas treatment. When the temperature fluctuation of the waste liquid discharged from the central waste liquid is large, since the temperature of the exhaust gas discharged from the central exhaust pipe also has a high calorific value, the area formed by the exhaust gas spraying can serve as a buffer zone for the central combustion area. For example, when the calorific value of the waste liquid is large, the heat in the central combustion area will be transferred to the exhaust gas area, thereby avoiding excessive temperature concentration. When the calorific value of the waste liquid is reduced, the heat in the exhaust gas area can provide a certain amount of heat supplement to the central combustion area, thereby forming a supplementary effect on the central combustion area. Furthermore, the exhaust gas discharged from the central exhaust pipe is arranged in a ring shape on the surrounding side of the central combustion area, thereby forming a temperature barrier, which can reduce the impact of temperature fluctuations outside the temperature barrier on the flame in the central combustion area, thereby ensuring the stability of the temperature in the central combustion area and improving the treatment effect of exhaust gas and waste liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0029] Figure 1 is an overall structural diagram of a central burner provided in an embodiment of the present application;

[0030] Figure 2 is an overall cross-sectional view of a central burner provided in an embodiment of the present application;

[0031] Figure 3 It is an exploded structural diagram for representing a first mounting seat and a central spray gun provided in an embodiment of the present application;

[0032] Figure 4 is a cross-sectional view provided in an embodiment of the present application for showing a first mounting seat and a central spray gun;

[0033] Figure 5 is an overall structural diagram for representing the structure of a central spray gun provided in an embodiment of the present application;

[0034] Figure 6 is a cross-sectional view provided in an embodiment of the present application for illustrating a central spray gun structure;

[0035] Figure 7 The embodiment of this application provides Figure 6 A partial enlarged view of part A;

[0036] Figure 8 is a cross-sectional view of the central burner provided in an embodiment of the present application without the first mounting seat and other parts of the structure on the first mounting seat;

[0037] Fig. 9 It is an overall view for representing the structure of the inner ring spray gun provided in the embodiment of the present application;

[0038] Fig.10 It is a cross-sectional view provided in an embodiment of the present application for representing the structure of the inner ring spray gun.

[0039] Reference numerals: 1, first mounting seat; 10, first cavity; 101, first air inlet channel; 102, first air outlet; 11, first mounting pipe; 12, first mounting plate;

[0040] 2. Center spray gun;

[0041] 21, central waste liquid spray pipe; 211, central waste liquid pipe; 212, central sleeve; 2120, spray medium channel; 212a, spray medium inlet; 210, spray end;

[0042] 22, central gas pipe; 220, gas channel; 22a, central gas inlet; 221, bending portion; 2210, central gas hole;

[0043] 23, central exhaust pipe; 230, exhaust passage; 23a, central exhaust inlet; 2300, exhaust outlet; 231, main pipe; 232, branch pipe;

[0044] 24, cooling pipe; 240, cooling channel; 24a, cooling air connector;

[0045] 31. first flange; 32. second flange;

[0046] 4. Flame stabilizing plate; 40. Spacing space; 41. Flame stabilizing hole;

[0047] 5. Inner circle spray gun; 51. Inner circle waste liquid spray pipe; 511. Inner circle waste liquid pipe; 512. Inner circle casing; 512a. Inner circle spray medium inlet; 52. Cooling jacket; 520. Cooling cavity; 52a. Cooling gas inlet;

[0048] 6. Second mounting seat; 61. Second mounting tube; 62. Second mounting plate; 60. Second cavity; 601. Second air inlet;

[0049] 7. Outer ring spray gun;

[0050] 8. Outer ring gas pipe; 81. Ring pipe; 82. Outer ring gas supply pipe; 83. Outer ring branch pipe;

[0051] 9. housing; 90. second air inlet passage;

[0052] 151. a first stable support; 152. a second stable support;

[0053] 161. Fire viewing hole; 162. Fire detection assembly; 163. Ignition gun. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0056] Background: Industrial production usually emits a large amount of pollutants. In some chemical fields, nitrogen- and amino-containing organic waste gas and waste liquid are common wastes, and direct discharge will cause serious pollution to the environment.

[0057] At present, the main methods for treating nitrogen-containing and amino-containing waste gas and waste liquid include thermal oxidation incineration, ammonia absorption method and catalyst catalytic reduction method. Among them, the process of thermal oxidation incineration is generally: nitrogen-containing waste gas and waste liquid are oxidized and decomposed into inorganic small molecules under the condition of being greater than the set temperature, and after waste heat recovery and flue gas purification, they become harmless components such as C02, H20, N2 and are discharged into the atmosphere. In some examples, the set temperature is generally 1100℃.

[0058] However, the sources of waste gas and waste liquid are very complex, especially the calorific value of each component input at different times varies greatly. When the waste gas and waste liquid with large calorific value fluctuations come into contact with the burning flame during heat treatment, it is easy to cause the flame temperature to be unstable, resulting in the treatment effect not meeting expectations. For example, a large amount of fuel-type NOx products will be generated, which are harmful to the human body and require a lot of cost to eliminate in the later stage. Therefore, it is more important to keep the flame temperature stable in the central combustion area.

[0059] At present, our company's treatment strategy is to carry out graded combustion of waste liquid and waste gas, that is, to divide the waste gas and waste liquid into different gradients according to the calorific value, and make targeted arrangements in combination with the setting of the combustion area to reduce the calorific value fluctuations of each waste gas and waste liquid input into the furnace, thereby reducing the impact of the waste gas and waste liquid on the central combustion area.

[0060] However, the above design still has great limitations: 1. Due to comprehensive issues such as installation space, internal combustion space of the furnace, and economic cost, generally only about three areas can be set on a combustion device for calorific value classification and discharge of waste gas and waste liquid, so the calorific value classification is limited. For example, the calorific value of the waste gas and waste liquid received is 1000kJ / Nm 3 Up to 20000kJ / Nm 3 . If it is divided into three gradients, generally 1000-5000, 5001-13000, and 13001-20000, relying on only three gradients to cover all calorific value ranges will result in a relatively large interval span for each calorific value classification. Therefore, even if the waste gas and waste liquid are graded, when encountering some waste gas and waste liquid with a larger calorific value span such as the above, it is still easy for the calorific value of the materials entering the combustion area to fluctuate greatly, and there is still a certain impact during heat treatment, resulting in a large fluctuation in the temperature of the combustion area; 2. If the calorific value of the waste gas and waste liquid fluctuates very frequently, such as irregular short-term large calorific value fluctuations, it will be very cumbersome to grade the fuel for this situation. It is necessary to design a set of graded control devices according to the calorific value of the waste liquid and waste gas, resulting in a substantial increase in costs.

[0061] Therefore, the present application aims to propose a central burner that can better maintain the temperature stability of the central combustion area, thereby reliably heat treating the waste gas and waste liquid.

[0062] The following is combined with Figure 1-10 The present application is further described.

[0063] Reference Figure 1 and Figure 2, is a central burner disclosed in the present application, having an axial direction and a circumferential direction, and the central burner comprises a first mounting seat 1 and a central spray gun 2, an inner ring spray gun 5, an ignition gun 163, a flame observation hole 161, and a flame detection component 162 arranged on the first mounting seat 1. Among them, the flame observation hole 161 is used to observe the flame combustion situation, and the flame detection component 162 is a flame detector, which obtains the flame combustion situation through the spectrum phenomenon analysis of the flame combustion.

[0064] Specifically for the above structure.

[0065] Reference Figure 3 and Figure 4 The first mounting seat 1 includes a first mounting tube 11 extending axially and a first mounting plate 12 covering the axial top end of the first mounting tube 11. The first mounting tube 11 has a first cavity 10 and a first air outlet 102 facing away from the first mounting plate 12. The outer wall of the first mounting tube 11 is connected to a first air inlet channel 101. Air enters the first cavity 10 from the first air inlet channel 101 and finally flows to the position of the first air outlet 102 to provide oxygen required for combustion.

[0066] Reference Figure 4-Figure 7 The central spray gun 2 is axially penetrated in the first mounting plate 12, and the central spray gun 2 includes a central waste liquid spray pipe 21, a cooling pipe 24, a central gas pipe 22 and a central waste gas pipe 23 which are coaxially arranged in sequence from the inside to the outside.

[0067] The central waste liquid spray pipe 21 includes: a central waste liquid pipe 211 extending in the axial direction; a central sleeve 212, which is sleeved on the outer side of the central waste liquid pipe 211, a spray medium channel 2120 is left between the central sleeve 212 and the outer wall of the central waste liquid pipe 211, a spray medium inlet 212a is provided on the central sleeve 212, and the central waste liquid spray pipe 21 forms a spray end 210 at a position close to the first air outlet 102. The waste liquid enters the central waste liquid pipe 211 and is sprayed from the spray end 210, and the spray medium enters the spray medium channel 2120 from the spray medium inlet 212a, and is finally sprayed out to hit the waste liquid to achieve a spray effect.

[0068] The cooling pipe 24 is sleeved on the outside of the central sleeve 212, and a cooling channel 240 is formed between the cooling pipe 24 and the outer wall of the central sleeve 212. The cooling pipe 24 is located on the outside of the first cavity 10 and is connected to a cooling air connector 24a. In the embodiment of the present application, the cooling air enters the cooling channel 240 from the cooling air connector 24a, thereby cooling the central waste liquid spray pipe 21 and the central exhaust gas pipe 23 in operation to ensure stable operation.

[0069] The central gas pipe 22 is sleeved on the outside of the cooling pipe 24, and a gas channel 220 is left between the inner wall of the central gas pipe 22 and the outer wall of the central waste liquid spray pipe 21. Figure 5 and Figure 7 The top of the central gas pipe 22 is connected to a central gas inlet 22a. The end of the central gas pipe 22 located in the first cavity 10 is bent toward the outer wall of the cooling pipe 24 to form a bent portion 221. The inner peripheral side wall of the bent portion 221 is in sealing contact with the outer side wall of the cooling pipe 24. The bent portion 221 is provided with a central gas hole 2210 for gas to flow out. The gas enters the gas channel 220 from the central gas inlet 22a, and finally is sprayed into the central combustion area in an inclined shape through the central gas hole 2210, thereby burning the waste liquid.

[0070] The central exhaust pipe 23 has an exhaust outlet 2300, which is arranged in a ring shape around the spray end 210. The exhaust temperature of the exhaust outlet 2300 is T 中心废气 The outlet combustion temperature of the central gas pipe 22 is T 中心燃气 , satisfying T 中心废气 With T 中心燃气 The absolute value of the difference between them is less than a predetermined threshold.

[0071] In one example, the central exhaust pipe 23 includes a main pipe 231 and a branch pipe 232 that are interconnected. The main pipe 231 is sleeved on the outside of the central waste liquid spray pipe 21. The inner wall of one end of the main pipe 231 close to the first gas outlet 102 is sealed with the outside of the central waste liquid spray pipe 21. The branch pipe 232 is annularly arranged on the outer wall of the main pipe 231. One end of the branch pipe 232 is connected to the main pipe 231, and the outlet of the other end of the branch pipe 232 forms an exhaust gas outlet 2300. In the embodiment of the present application, the central exhaust pipe 23 is formed by the structural form of the main pipe 231 and the branch pipe 232. The exhaust gas outlet 2300 of the branch pipe 232 is spaced apart, so that the exhaust gas outlet 2300 will not completely shield the central combustion area while forming a temperature barrier, thereby ensuring the temperature radiation of the central combustion area to other areas.

[0072] As described above, the gas ejected from the central gas pipe 22 forms a central combustion area under the action of the igniter. It can be understood that the flame temperature of the central combustion area needs to be kept stable in order to more stably and reliably treat the waste gas and waste liquid. Therefore, how to ensure the stability of the central combustion area is more critical. In the embodiment of the present application, a central exhaust pipe 23 is set outside the central waste liquid spray pipe 21 for exhaust. First, the exhaust temperature of the central exhaust pipe 23 is set. The temperature T 中心废气 The temperature T of the central combustion area 中心燃气The difference between them is within a predetermined range, and the temperature fluctuation of the exhaust gas discharge is small, which can effectively reduce the impact of temperature fluctuations on the central combustion area during exhaust gas treatment. When the temperature fluctuation of the waste liquid discharged from the central waste liquid is large, since the temperature of the exhaust gas discharged from the central exhaust pipe 23 also has a high calorific value, the area formed by the exhaust gas spraying can serve as a buffer zone for the central combustion area. For example, when the calorific value of the waste liquid is large, the heat in the central combustion area will be transferred to the exhaust gas area, thereby avoiding excessive temperature concentration. When the calorific value of the waste liquid is reduced, the heat in the exhaust gas area can provide a certain amount of heat supplement to the central combustion area, thereby forming a supplementary effect on the central combustion area.

[0073] Furthermore, the exhaust gas discharged from the central exhaust pipe 23 is arranged in a ring shape on the surrounding side of the central combustion area, thereby forming a temperature barrier, which can reduce the impact of temperature fluctuations outside the temperature barrier on the flame in the central combustion area, thereby ensuring the temperature stability of the central combustion area and improving the exhaust gas and waste liquid treatment effect.

[0074] Reference Figure 6 As one of the optional embodiments of the present application, a first flange 31 is provided at one end of the cooling pipe 24 outside the first cavity 10, and a second flange 32 is provided outside the central waste liquid spray pipe 21. The first flange 31 and the second flange 32 are bolted together so that the central waste liquid spray pipe 21 can be detachably connected to the cooling pipe 24. In the embodiment of the present application, the central waste liquid spray pipe 21 can be easily detached from the cooling pipe 24, which greatly facilitates the inspection and maintenance work, thereby ensuring the smooth and safe conduct of the heat treatment.

[0075] Reference Figure 4 and Figure 5 As one of the optional embodiments of the present application, it also includes a flame stabilizing disk 4, which is sleeved on the outer side of the central exhaust pipe 23, and a spacing space 40 is left between the outer peripheral side of the flame stabilizing disk 4 and the inner wall of the first mounting tube 11, and a plurality of flame stabilizing holes 41 are opened on the flame stabilizing disk 4 along the axial direction, and the plurality of flame stabilizing holes 41 are arranged along the circumferential direction, wherein the flow area of ​​the spacing space 40 is S1, and the flow area of ​​the plurality of flame stabilizing holes 41 is S2, satisfying S1≥S2.

[0076] In the embodiment of the present application, the air entering the first mounting tube 11 enters the vicinity of the ejection port of the central gas pipe 22 through the flame stabilizing holes 41 on the flame stabilizing disk 4, thereby mixing with the gas and burning. The flame stabilizing disk 4 is capable of controlling the amount of contact between air and gas. When the amount of air is large, since S1 ≥ S2, the air preferentially passes through the spacing space 40 rather than the flame stabilizing holes 41, which is beneficial to maintaining the amount of air in contact with the gas, thereby maintaining the combustion stability of the flame in the central area and reducing fluctuations.

[0077] Reference Figure 1 and Figure 2 and Figure 8 As one of the optional embodiments of the present application, it also includes a second mounting seat 6, which includes a second mounting tube 61 sleeved on the outside of the first mounting seat 1 and a second mounting plate 62 arranged at one end of the second mounting tube 61 close to the first mounting plate 12, and a second cavity 60 is formed between the inner wall of the second mounting tube 61 and the outer wall of the first mounting tube 11.

[0078] The central burner further includes a plurality of inner ring spray guns 5 and a plurality of outer ring spray guns 7 . The plurality of inner ring spray guns 5 are arranged in a circle on the first mounting plate 12 , and the plurality of outer ring spray guns 7 are arranged in a circle on the second mounting plate 62 .

[0079] Reference Fig. 9 and Fig.10 , wherein a plurality of inner ring spray guns 5 are arranged on the peripheral side of the central spray gun 2, and the inner ring spray gun 5 includes an inner ring waste liquid spray pipe 51, and the spray port of the inner ring waste liquid spray pipe 51 is arranged on the outer peripheral side of the flame stabilizing disk 4. The inner ring spray gun 5 also includes a cooling jacket 52, and the cooling jacket 52 is sleeved on the outer wall of the inner ring waste liquid spray pipe 51, and a cooling cavity 520 is left between the cooling jacket 52 and the outer wall of the inner ring waste liquid spray pipe 51, and a cooling gas inlet 52a is opened on the cooling jacket 52 for connecting the cooling cavity 520 and the first cavity 10.

[0080] Back to Figure 3 In order to improve stability, a first stable bracket 151 is provided on the inner wall of the first mounting tube 11, and a plurality of tightening holes are provided on the first stable bracket 151 for inserting and fixing the center spray gun 2 and the inner ring spray gun 5.

[0081] As one of the optional embodiments of the present application, in the embodiment of the present application, when treating waste liquid, the waste liquid is divided into three levels and enters the burner, which can perform more detailed temperature grading of the waste liquid, so that the temperature of the waste liquid matches the temperature of the combustion area, thereby avoiding the influence of the waste liquid with large fluctuations on the combustion temperature, and after the waste liquid is divided into three levels, the uniformity of the waste liquid distribution can be effectively improved, further reducing the temperature impact on the combustion area caused by the concentrated input of waste liquid.

[0082] As one of the optional embodiments of the present application, it also includes an outer ring gas pipe 8, which includes: an annular pipe 81, surrounding the outer side of one end of the first mounting pipe 11 away from the first mounting plate 12; an outer ring air supply pipe 82, the outer ring air supply pipe 82 axially penetrates the second mounting plate 62, one end of the outer ring air supply pipe 82 is connected to the annular pipe 81; and a plurality of outer ring branch pipes 83, the outer ring branch pipes 83 are all connected to the annular pipe 81, and the outer ring branch pipes 83 are arranged in a ring shape on the circumferential side of the first mounting pipe 11.

[0083] It should be noted that the structure of the outer ring spray gun 7 is consistent with that of the inner ring, and will not be described in detail here. In order to improve stability, a second stable bracket 152 is provided on the inner wall of the second mounting tube 61 for inserting the outer ring branch pipe 83 and the outer ring spray gun 7. The outer ring spray gun 7 can be a spray gun for supplying waste liquid or a spray gun for supplying waste gas.

[0084] In the embodiment of the present application, the outer ring gas pipe 8 and the central gas pipe 22 are graded to evenly disperse the gas in the first cavity 10 and the second cavity 60, which avoids the combustion temperature from being too concentrated, thereby causing the generation of fuel-type NOx. It can be understood that nitrogen-containing organic waste gas and waste liquid mainly exist in the organic waste gas and waste liquid in the form of -CN and -NH2. When the nitrogen-containing waste gas and waste liquid are treated by thermal oxidation, a large amount of fuel-type NOx is easily generated. Fuel-type NOx is harmful to the environment and human health. And the important influencing factor affecting the generation of fuel-type NOx gas is temperature. The higher the temperature, the easier it is to generate fuel-type NOx. Therefore, dispersing the gas helps to improve the uniformity of combustion distribution, avoid excessive concentration of combustion temperature, and thus reduce the generation of fuel-type NOx. In addition, the temperature provided by the outer ring gas pipe 8 is blocked by the first mounting pipe 11 and the temperature barrier, further reducing the temperature influence of the outer ring combustion area on the central combustion area, and ensuring the stability of the combustion temperature in the central combustion area.

[0085] As one of the optional embodiments of the present application, it also includes a shell 9, which is covered on the outside of the second mounting tube 61, and a second air inlet channel 90 is provided on the shell 9, and a second air inlet 601 is provided on the second mounting tube 61.

[0086] It should be noted that when air is supplied to the first air inlet channel 101 and the second air inlet channel 90 , valves and flow meters are provided accordingly to monitor and control the flow of the incoming air.

[0087] A combustion device comprises: a furnace having a combustion chamber and a top cover plate; and the above-mentioned central burner, which is arranged at the center position of the top cover plate.

[0088] The above description is only a partial implementation method of the embodiments of the present application and does not constitute any form of limitation on the application. The protection scope of the embodiments of the present application is not limited thereto. Any simple modifications, equivalent changes and modifications that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the embodiments of the present application should be covered within the protection scope of the embodiments of the present application.

Claims

1. A central burner, characterized in that: include: A first mounting seat (1) comprises a first mounting tube (11) and a first mounting plate (12) covering one axial end of the first mounting tube (11), the first mounting tube (11) having a first cavity (10) and a first air outlet (102) facing away from the first mounting plate (12), and an outer side wall of the first mounting tube (11) is connected to a first air inlet channel (101); A central spray gun (2) is disposed along the axial direction and is penetrated by the first mounting plate (12). The central spray gun (2) comprises: A central waste liquid spray pipe (21) having a spray end (210) close to the first gas outlet (102); a central gas pipe (22) which is sleeved on the outer side of the central waste liquid spray pipe (21), and a gas channel (220) is left between the inner wall of the central gas pipe (22) and the outer wall of the central waste liquid spray pipe (21); and A central exhaust pipe (23) is sleeved on the outer side of the central gas pipe (22), and an exhaust passage (230) is left between the inner wall of the central exhaust pipe (23) and the outer wall of the central gas pipe (22); The central exhaust pipe (23) has an exhaust outlet (2300), the exhaust outlet (2300) is arranged in a ring shape in the circumference of the spray end (210), and the exhaust temperature of the exhaust outlet (2300) is T 中心废气 The outlet combustion temperature of the central gas pipe (22) is T 中心燃气 , satisfying T 中心废气 With T 中心燃气 The absolute value of the difference between them is less than a predetermined threshold.

2. The central burner according to claim 1, characterized in that The central exhaust pipe (23) comprises a main pipe (231) and a branch pipe (232) which are interconnected. The main pipe (231) is sleeved on the outer side of the central waste liquid spray pipe (21). The inner wall of one end of the main pipe (231) close to the first air outlet (102) is sealed with the outer side of the central waste liquid spray pipe (21). The branch pipe (232) is arranged in a ring shape on the outer side wall of the main pipe (231). One end of the branch pipe (232) is connected to the main pipe (231), and the outlet of the other end of the branch pipe (232) forms the exhaust gas outlet (2300).

3. The central burner according to claim 1, characterized in that The central waste liquid spray pipe (21) comprises: A central waste liquid pipe (211) extending along the axial direction; The central sleeve (212) is sleeved on the outside of the central waste liquid pipe (211), a spray medium channel (2120) is reserved between the central sleeve (212) and the outer wall of the central waste liquid pipe (211), and a spray medium inlet (212a) is provided on the central sleeve (212).

4. The central burner according to claim 3, characterized in that The central spray gun (2) further comprises a cooling pipe (24), wherein the cooling pipe (24) is sleeved on the outer side of the central sleeve (212), and a cooling channel (240) is formed between the cooling pipe (24) and the outer wall of the central sleeve (212); the central gas pipe (22) is sleeved on the outer side of the cooling pipe (24), and the end of the central gas pipe (22) located in the first cavity (10) is bent toward the outer wall of the cooling pipe (24) to form a bent portion (221), and the inner peripheral side wall of the bent portion (221) is in sealing contact with the outer wall of the cooling pipe (24), and the bent portion (221) is provided with a central gas hole (2210) for gas to flow out, and the cooling pipe (24) located on the outer side of the first cavity (10) is connected to a cooling air joint (24a).

5. The central burner according to claim 4, characterized in that A first flange (31) is provided at one end of the cooling pipe (24) located outside the first cavity (10), and a first flange (31) is provided on the outer side of the central waste liquid spray pipe (21). The first flange (31) is bolted to the second flange (32) so that the central waste liquid spray pipe (21) can be detachably connected to the cooling pipe (24).

6. The central burner according to claim 1, characterized in that It also includes a flame stabilizing disk (4), which is sleeved on the outer side of the central exhaust pipe (23), and a spacing space (40) is left between the outer peripheral side of the flame stabilizing disk (4) and the inner wall of the first mounting tube (11), and the flame stabilizing disk (4) is provided with a plurality of flame stabilizing holes (41) penetrating along the axial direction, and the plurality of flame stabilizing holes (41) are arranged along the circumferential direction, wherein the flow area of ​​the spacing space (40) is S1, and the flow area of ​​the plurality of flame stabilizing holes (41) is S2, satisfying S1≥S2.

7. The central burner according to claim 6, characterized in that It also includes a plurality of inner ring spray guns (5), which are arranged along the axial direction on the first mounting plate (12), and a plurality of inner ring spray guns (5) are arranged on the peripheral side of the central spray gun (2). The inner ring spray gun (5) includes an inner ring waste liquid spray pipe (51), and the spray port of the inner ring waste liquid spray pipe (51) is arranged on the outer peripheral side of the flame stabilizing disk (4).

8. The central burner according to claim 7, characterized in that The inner circle spray gun (5) also includes a cooling jacket (52), which is sleeved on the outer wall of the inner circle waste liquid spray pipe (51), and a cooling cavity (520) is left between the cooling jacket (52) and the outer wall of the inner circle waste liquid spray pipe (51), and a connecting hole is opened on the cooling jacket (52) for connecting the cooling cavity (520) and the first cavity (10).

9. The central burner according to claim 7, characterized in that The central burner further comprises a second mounting seat (6), wherein the second mounting seat (6) comprises a second mounting tube (61) sleeved on the outside of the first mounting seat (1) and a second mounting plate (62) arranged on one end of the second mounting tube (61) close to the first mounting plate (12), wherein a second cavity (60) is formed between the inner wall of the second mounting tube (61) and the outer wall of the first mounting tube (11), and the central burner further comprises an outer ring spray gun (7), wherein the outer ring exhaust gas spray gun is arranged in a circular shape on the second mounting plate (62), and the outer ring spray gun (7) comprises an outer ring waste liquid spray pipe.

10. The central burner according to claim 9, characterized in that It also includes an outer ring gas pipe (8), wherein the outer ring gas pipe (8) includes: an annular tube (81) surrounding the outer side of one end of the first mounting tube (11) away from the first mounting plate (12); an outer ring air supply pipe (82), the outer ring air supply pipe (82) penetrating the second mounting plate (62) along the axial direction, one end of the outer ring air supply pipe (82) being connected to the annular pipe (81); and A plurality of outer ring branch pipes (83), each of which is in communication with the annular pipe (81), and the outer ring branch pipes (83) are arranged in an annular shape on the circumference of the first mounting pipe (11).

11. The central burner according to claim 10, characterized in that It also comprises a shell (9), the shell (9) being arranged to cover the outside of the second mounting tube (61), the shell (9) being provided with a second air inlet channel (90), and the second mounting tube (61) being provided with a second air inlet port (601).

12. A combustion device, characterized in that: include: A furnace having a combustion chamber and a top cover plate; The central burner according to any one of claims 1 to 11, wherein the central burner is arranged at a central position of the top cover plate.

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