Tar combustion system

Abstract

The utility model provides a tar combustion system, and belongs to the technical field of tar combustion. The tar combustion system comprises a tar storage tank, a high-shear pump, a sodium carbonate boiler and a tar spray gun, an outlet of the tar storage tank is connected with the high-shear pump through a tar discharge pipeline, an outlet header pipe is arranged at an outlet of the high-shear pump, and the outlet header pipe is connected with a first backflow inlet of the tar storage tank through a tar backflow pipeline. The tar spray gun is connected with the tar backflow pipeline through a spray gun pipeline and arranged in the sodium carbonate boiler. According to the tar combustion system, the high-shear pump is adopted, the high-shear pump has the crushing function, the tar flow is stabilized, large particles in tar are crushed, the possibility that the tar spray gun is blocked is reduced, the tar atomization effect of the tar spray gun is improved, tar can be fully combusted after being sprayed out of the tar spray gun, natural gas consumption is reduced, and the tar combustion efficiency is improved. And the contents of CO and NOx in the tail gas are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tar combustion, and in particular relates to a tar combustion system. Background Art

[0002] The combustion system of the sodium carbonate boiler uses natural gas and tar as fuel. The combustion system includes a natural gas burner and a tar spray gun. The tar spray gun uses a centrifugal pump to transport tar and uses low-pressure steam as the power source for tar atomization. The tail gas after tar combustion contains CO, and under normal circumstances, the combustion value is 50-80 mg / m 3 However, when the pressure of the tar injected into the tar spray gun fluctuates, it is easy to cause a variety of problems. The tar is transported by a centrifugal pump, and the outlet of the centrifugal pump has problems such as low pressure and large flow fluctuations. Large particles in the tar are easy to block the tar spray gun and tar pipeline. The atomizing steam pressure is low, the tar atomization effect is poor, and the tar flow rate increases suddenly, which will cause incomplete combustion and cause the carbon monoxide content in the tail gas to exceed the current environmental protection standards. The carbon monoxide content in the tail gas may even reach 15,000-20,000 mg / m 3 When the CO content monitoring value is detected to be increased, the boiler parameters are adjusted accordingly. During the adjustment process, there will be a time delay, which will affect the treatment of exhaust gas. In addition, the exhaust gas also contains NO x , generally ammonia water is used as a reducing agent for treatment, and the amount of ammonia water used is relatively large. During the combustion of tar in the boiler, a natural gas burner is installed in the boiler. The natural gas burner is used to dry the furnace in the initial operation and to provide tar for co-burning during normal operation. The boiler uses tar as the main raw material for combustion, but due to the influence of tar pressure fluctuations, the tar combustion effect is poor during actual operation, and the continuous combustion time of tar is short. It is necessary to constantly switch to natural gas auxiliary combustion, which requires frequent switching and high natural gas consumption. Utility Model Content

[0003] The utility model aims to provide a tar combustion system, aiming to solve the problems of large tar pressure fluctuation and poor tar atomization effect.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a tar combustion system, including: a tar storage tank, a high shear pump, a sodium carbonate boiler and a tar spray gun, the outlet of the tar storage tank is connected to the high shear pump through a tar discharge pipe, the outlet of the high shear pump is provided with an outlet main pipe, the end of the outlet main pipe is connected to a tar reflux pipe, the tar reflux pipe is connected to the first reflux inlet of the tar storage tank, the tar spray gun is connected to the tar reflux pipe through a spray gun pipe, and the tar spray gun is arranged in the sodium carbonate boiler.

[0005] In a possible implementation, a gear oil pump is provided on the side of the high shear pump connected to the tar spray gun.

[0006] In a possible implementation, two groups of gear oil pumps are provided.

[0007] In a possible implementation, two groups of the gear oil pumps are arranged in parallel.

[0008] In a possible implementation, a tar return pipe is further connected to the end of the outlet main pipe, and the other end of the tar return pipe is connected to the second reflux inlet of the tar storage tank.

[0009] In a possible implementation, a tar flow detector is provided between the gear oil pump and the tar spray gun.

[0010] In a possible implementation, a tar circuit pressure detector is provided between the tar spraying gun and the tar storage tank.

[0011] In a possible implementation, the gear oil pump is connected to a frequency converter.

[0012] In a possible implementation, a compressed air pipeline and an atomizing steam pipeline are provided on the spray gun pipeline.

[0013] In a possible implementation, the inclination angle of the tar spray gun is between 30° and 100°.

[0014] The beneficial effects of a tar combustion system provided by the utility model are:

[0015] Compared with the prior art, a tar storage tank, a high shear pump, a sodium carbonate boiler and a tar spray gun are provided, and the components are connected by pipelines. The outlet of the tar storage tank is connected to a tar discharge pipeline, and the other end of the tar discharge pipeline is connected to the high shear pump. The outlet of the high shear pump is provided with an outlet main pipe, and the outlet main pipe is connected to a tar reflux pipeline. The other end of the tar reflux pipeline is connected to the first reflux inlet of the tar storage tank. The tar spray gun is provided in the sodium carbonate boiler, and the inlet of the tar spray gun is connected to a spray gun pipeline. The inlet of the spray gun pipeline is provided at On the tar reflux pipeline, the tar in the tar storage tank enters the high shear pump through the tar discharge pipeline. The high shear pump has a crushing function to crush the large particles in the tar and stabilize the tar flow. The crushed tar enters the tar reflux pipeline, and a part of the tar enters the tar spray gun through the spray gun pipeline. The tar spray gun atomizes the tar, reducing the possibility of tar spray gun blockage and improving the tar atomization effect of the tar spray gun. The tar can be fully burned after being sprayed out of the tar spray gun, reducing natural gas consumption and reducing CO and NO in the tail gas. x The tar that does not enter the spray gun pipeline flows back into the tar storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of a tar combustion system provided in an embodiment of the utility model.

[0018] In the figure: 1. Tar storage tank; 2. Tar discharge pipeline; 3. High shear pump; 4. Gear oil pump; 5. Tar flow detector; 6. Spray gun pipeline; 7. Compressed air pipeline; 8. Atomizing steam pipeline; 9. Tar spray gun; 10. Sodium carbonate boiler; 11. Tar reflux pipeline; 12. Tar circuit pressure detector; 13. Outlet main pipe; 14. Tar return pipeline. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Please refer to Figure 1 A specific implementation of a tar combustion system provided by the utility model is now described, including: a tar storage tank 1, a high shear pump 3, a sodium carbonate boiler 10 and a tar spray gun 9, the outlet of the tar storage tank 1 is connected to the high shear pump 3 through a tar discharge pipe 2, the outlet of the high shear pump 3 is provided with an outlet main pipe 13, the end of the outlet main pipe 13 is connected to a tar reflux pipe 11, the tar reflux pipe 11 is connected to the first reflux inlet of the tar storage tank 1, the tar spray gun 9 is connected to the tar reflux pipe 11 through a spray gun pipe 6, and the tar spray gun 9 is arranged in the sodium carbonate boiler 10.

[0021] The utility model provides a tar combustion system. Compared with the prior art, the utility model is provided with a tar storage tank 1, a high shear pump 3, a sodium carbonate boiler 10 and a tar spray gun 9. The components are connected by pipelines. The outlet of the tar storage tank 1 is connected with a tar discharge pipeline 2. The other end of the tar discharge pipeline 2 is connected with the high shear pump 3. The outlet of the high shear pump 3 is provided with an outlet main pipe 13. The outlet main pipe 13 is connected with a tar reflux pipeline 11. The other end of the tar reflux pipeline 11 is connected to the first reflux inlet of the tar storage tank 1. The tar spray gun 9 is arranged in the sodium carbonate boiler 10. The inlet of the tar spray gun 9 is connected with a spray gun pipeline 6. The inlet of the spray gun pipeline 6 is provided with On the tar reflux pipe 11, the tar in the tar storage tank 1 enters the high shear pump 3 through the tar discharge pipe 2. The high shear pump 3 has a crushing function, which can crush large particles in the tar and stabilize the tar flow. The crushed tar enters the tar reflux pipe 11, and a part of the tar enters the tar spray gun 9 through the spray gun pipe 6. The tar spray gun 9 atomizes the tar, which reduces the possibility of clogging of the tar spray gun 9 and improves the tar atomization effect of the tar spray gun 9. The tar can be fully burned after being sprayed out from the tar spray gun 9, which reduces the natural gas consumption and reduces the content of CO and NOx in the exhaust gas. The tar that does not enter the spray gun pipe 6 flows back into the tar storage tank 1.

[0022] For details, please refer to Figure 1 , including a tar storage tank 1, a high shear pump 3, a sodium carbonate boiler 10 and a tar spray gun 9, wherein tar is stored in the tar storage tank 1, and a tar discharge pipe 2 is arranged at the tar outlet of the tar storage tank 1, and the tar discharge pipe 2 connects the tar storage tank 1 and the high shear pump 3, and the high shear pump 3 has a crushing function, which crushes large particles in the tar, stabilizes the tar flow, avoids tar accumulation in the pipe, and reduces the probability of tar spray gun 9 being blocked, and an outlet manifold 13 is arranged at the outlet of the high shear pump 3, and the outlet manifold 13 is connected to a tar reflux pipe 11, and the other end of the tar reflux pipe 11 is connected to a first reflux inlet of the tar storage tank 1, and the first reflux inlet is located on the upper top wall of the tar storage tank 1, so as to facilitate the reflux of tar into the tar storage tank 1 for the transportation and reflux of tar, The spray gun pipe 6 is arranged on the tar reflux pipe 11, and the outlet of the spray gun pipe 6 is connected to the inlet of the tar spray gun 9. The tar spray gun 9 is arranged in the sodium carbonate boiler 10. The tar in the tar storage tank 1 enters the high shear pump 3 through the tar discharge pipe 2. The high shear pump 3 crushes the large particles in the tar to stabilize the tar flow. The crushed tar enters the tar reflux pipe 11, and a part of the tar enters the tar spray gun 9 through the spray gun pipe 6. The tar spray gun 9 atomizes the tar, reduces the possibility of clogging of the tar spray gun 9, and improves the tar atomization effect of the tar spray gun 9. The tar can be fully burned after being sprayed out from the tar spray gun 9, reduces the natural gas consumption, and reduces the content of CO and NOx in the exhaust gas. The tar that does not enter the spray gun pipe 6 flows back into the tar storage tank 1.

[0023] As a specific implementation of a tar combustion system provided by the utility model, please refer to Figure 1 A gear oil pump 4 is provided on one side of the high shear pump 3 connected to the tar spray gun 9.

[0024] For details, please refer to Figure 1 The gear oil pump 4 is arranged on the tar reflux pipe 11 and on the side close to the high shear pump 3. The gear oil pump 4 is used to increase the pressure of the transported tar (from 0.02MPa to 0.1MPa) and stabilize the tar flow rate, which is helpful for the transportation of tar.

[0025] As a specific implementation of a tar combustion system provided by the utility model, please refer to Figure 1 , the gear oil pump 4 is provided with two groups.

[0026] For details, please refer to Figure 1 Two sets of gear oil pumps 4 are provided to enhance the stability of the tar flow.

[0027] As a specific implementation of a tar combustion system provided by the utility model, please refer to Figure 1 , two groups of gear oil pumps 4 are arranged in parallel.

[0028] For details, please refer to Figure 1 The two groups of gear oil pumps 4 are arranged in parallel on the tar reflux pipeline 11. The two groups of gear oil pumps 4 do not affect each other when working, thereby improving the stability of the device.

[0029] As a specific implementation of a tar combustion system provided by the utility model, please refer to Figure 1 The end of the outlet main pipe 13 is also connected to a tar return pipe 14 , and the other end of the tar return pipe 14 is connected to the second reflux inlet of the tar storage tank 1 .

[0030] For details, please refer to Figure 1 The outlet main pipe 13 of the high shear pump 3 is also provided with a tar return pipe 14, the outlet of the tar return pipe 14 is connected to the second reflux inlet of the tar storage tank 1, the second reflux inlet is located on the upper top wall of the tar storage tank 1, and the second reflux inlet is arranged on one side of the first reflux inlet to facilitate the reflux of excess tar into the tar storage tank 1, thereby increasing the stability of the tar flow rate.

[0031] As a specific implementation of a tar combustion system provided by the utility model, please refer to Figure 1 A tar flow detector 5 is provided between the gear oil pump 4 and the tar spray gun 9.

[0032] For details, please refer to Figure 1The tar flow detector 5 is arranged between the gear oil pump 4 and the tar spray gun 9 to monitor the flow of tar flowing into the tar spray gun 9, so as to facilitate the regulation of the tar flowing into the tar spray gun 9.

[0033] As a specific implementation of a tar combustion system provided by the utility model, please refer to Figure 1 A tar circuit pressure detector 12 is provided between the tar spray gun 9 and the tar storage tank 1 .

[0034] For details, please refer to Figure 1 The tar circuit pressure detector 12 is arranged between the tar spray gun 9 and the tar storage tank 1 to monitor the pressure of the tar returning to the tar storage tank 1 in the tar return pipe 11, so as to facilitate the regulation of the tar flowing into the tar spray gun 9.

[0035] As a specific implementation of a tar combustion system provided by the utility model, please refer to Figure 1 , the gear oil pump 4 is connected with a frequency converter.

[0036] For details, please refer to Figure 1 Each group of gear oil pumps 4 is connected to a group of frequency converters to increase the stability of the device.

[0037] As a specific implementation of a tar combustion system provided by the utility model, please refer to Figure 1 A compressed air pipeline 7 and an atomizing steam pipeline 8 are arranged on the spray gun pipeline 6.

[0038] For details, please refer to Figure 1 A compressed air pipeline 7 and an atomizing steam pipeline 8 are arranged on the spray gun pipeline 6 to facilitate the compressed air and atomizing steam to enter the tar spray gun 9.

[0039] As a specific implementation of a tar combustion system provided by the utility model, please refer to Figure 1 The inclination angle of the tar spray gun 9 is between 30° and 100°.

[0040] For details, please refer to Figure 1 The inclination angle of the tar spray gun 9 is between 30° and 100°. The selection of the inclination angle of the tar spray gun 9 according to the installation position of the tar spray gun 9 helps to improve the atomization effect of the tar and facilitates the distribution of the atomized tar in the sodium carbonate boiler 10.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tar combustion system, characterized in that: include: A tar storage tank, a high shear pump, a sodium carbonate boiler and a tar spray gun, wherein the outlet of the tar storage tank is connected to the high shear pump via a tar discharge pipe, the outlet of the high shear pump is provided with an outlet main pipe, the end of the outlet main pipe is connected to a tar reflux pipe, the tar reflux pipe is connected to a first reflux inlet of the tar storage tank, the tar spray gun is connected to the tar reflux pipe via a spray gun pipe, and the tar spray gun is arranged in the sodium carbonate boiler.

2. A tar combustion system according to claim 1, characterized in that: A gear oil pump is arranged on one side of the high shear pump connected to the tar spray gun.

3. A tar combustion system as claimed in claim 2, characterized in that: The gear oil pump is provided in two groups.

4. A tar combustion system as claimed in claim 3, characterized in that: The two groups of gear oil pumps are arranged in parallel.

5. A tar combustion system as claimed in claim 2, characterized in that: The end of the outlet main pipe is also connected to a tar return pipe, and the other end of the tar return pipe is connected to the second reflux inlet of the tar storage tank.

6. A tar combustion system as claimed in claim 2, characterized in that: A tar flow detector is arranged between the gear oil pump and the tar spray gun.

7. A tar combustion system as claimed in claim 2, characterized in that: A tar circuit pressure detector is arranged between the tar spray gun and the tar storage tank.

8. A tar combustion system as claimed in claim 2, characterized in that: The gear oil pump is connected with a frequency converter.

9. A tar combustion system as claimed in claim 1, characterized in that: The spray gun pipeline is provided with a compressed air pipeline and an atomizing steam pipeline.

10. A tar combustion system as claimed in claim 1, characterized in that: The inclination angle of the tar spray gun is between 30° and 100°.

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