Injection-seeding constant-temperature energy-saving device

Abstract

The utility model discloses an injection-seeding constant-temperature energy-saving device which comprises a tube type heat exchanger, a coil type heat exchanger, a barrel and a steam pocket, a first concentric reducing pipe and a second concentric reducing pipe are arranged at the two ends of the tube type heat exchanger respectively, and the first concentric reducing pipe is connected with a steam system through an equipment flange. The second concentric reducing pipe is connected with the coil heat exchanger, the coil heat exchanger is arranged on one side in the barrel, a spiral device used for guiding flow is arranged on the other side in the barrel, and the output end of the barrel is connected with the steam pocket. According to the jet-seeding constant-temperature energy-saving device adopting the structure, reducing agents such as ammonia, ammonia water and urea liquid from the ammonia supply system are uniformly mixed with superheated steam from the steam system, nitrogen oxides in waste gas are reduced, the reduction reaction rate is increased, the use amount of the reducing agents is reduced, the cost is reduced, and energy is saved; the problems that an existing nitric oxide waste gas treatment device is large in use amount of a reducing agent and high in cost are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen oxide waste gas treatment, in particular to a radiated constant temperature energy-saving device. Background Art

[0002] Nitrogen oxides refer to a series of compounds composed of nitrogen and oxygen elements, including N2O, NO, N2O3, NO2, N2O4, N2O5, usually with the molecular formula NO x NO in the atmosphere x It mainly exists in the form of NO and NO2 and was identified as one of the main pollutants in the atmosphere in the 1960s.

[0003] NO x It is very harmful to the human body and the environment. Nitrogen oxides can directly cause damage to the human respiratory tract and are a carcinogen. Nitrogen oxides can damage or even kill plants. Under the catalytic action of sunlight, nitrogen oxides are prone to undergo complex photochemical reactions with hydrocarbons to produce photochemical smog, leading to serious air pollution. Nitrogen oxides can cause destruction of the ozone layer. Nitrogen oxides are also easily combined with water vapor to form acid rain containing nitric acid.

[0004] The nitrogen oxide waste gas pollution in the atmosphere mainly comes from the emission of industrial waste gas. Industrial nitrogen oxide waste gas is a chronic and acute toxic effect, which will stimulate the respiratory organs and cause certain harm to the human body. The prevention and control methods are smoke exhaust and denitrification, and the second is to control NO x The production of nitrogen oxides. Nowadays, all industries are equipped with nitrogen oxide waste gas treatment equipment. Most of the waste gas treatment equipment uses ammonia, ammonia water, urea liquid, etc. as reducing agents, and then reacts with nitrogen oxides in the waste gas to reduce them to nitrogen and water. However, the reaction rate and utilization rate of ammonia in the reaction process are low, and the ammonia escape rate is high, resulting in an increase in ammonia consumption and increased costs during operation. Therefore, a broadcast constant temperature energy-saving device is provided that can increase the reaction rate, reduce the amount of ammonia used, and effectively reduce costs. Utility Model Content

[0005] The purpose of the utility model is to provide a broadcast constant temperature energy-saving device, which reduces nitrogen oxides in exhaust gas by mixing reducing agents such as ammonia, ammonia water, urea liquid, etc. from an ammonia supply system with superheated steam from a steam system, thereby increasing the reduction reaction rate, reducing the amount of reducing agent used, reducing costs, saving energy, and solving the problem of large amount of reducing agent used and high cost in existing nitrogen oxide exhaust gas treatment equipment.

[0006] To achieve the above-mentioned purpose, the utility model provides a radiation constant temperature energy-saving device, including a shell and tube heat exchanger, a coil heat exchanger, a cylinder and a steam drum, a first concentric reducer and a second concentric reducer are respectively provided at both ends of the shell and tube heat exchanger, the first concentric reducer is connected to the steam system through an equipment flange, the second concentric reducer is connected to the coil heat exchanger, the coil heat exchanger is arranged on one side of the cylinder, and a spiral device for guiding flow is arranged on the other side of the cylinder, and the output end of the cylinder is connected to the steam drum.

[0007] Preferably, a short section for connection is provided between the first concentric reducer and the equipment flange, and a pressure gauge P0 for measuring pressure is provided on the surface of the short section.

[0008] Preferably, the shell-and-tube heat exchanger is provided with a medium A inlet and a medium A outlet, and a temperature measuring gauge T1 for measuring temperature and a pressure gauge P1 for measuring pressure are provided at the medium A inlet.

[0009] Preferably, a temperature measuring meter T2 for measuring temperature is arranged inside the second concentric reducer, and a temperature measuring meter T3 for measuring temperature is arranged at the outlet of the second concentric reducer.

[0010] Preferably, the second concentric reducer is provided with a connecting pipe, which is arranged inside the cylinder. The connecting pipe includes connecting pipe A, connecting pipe B, connecting pipe C, and connecting pipe D. Connecting pipe A, connecting pipe B, connecting pipe C, and connecting pipe D are distributed in a "cross shape".

[0011] Preferably, the coil heat exchanger is provided with a medium B inlet and a medium B outlet.

[0012] Preferably, a pressure gauge P2 for measuring pressure is provided inside the steam drum, an output pipe is provided at the output end of the steam drum, a plurality of output pipes are provided, and the steam drum is also provided with a drain port for draining water.

[0013] Therefore, the utility model adopts a broadcast constant temperature energy-saving device with the above-mentioned structure, which reduces nitrogen oxides in the exhaust gas by mixing reducing agents such as ammonia, ammonia water, and urea liquid from the ammonia supply system with superheated steam from the steam system, thereby increasing the reduction reaction rate, reducing the amount of reducing agent used, reducing costs, and saving energy, thereby solving the problem of large amount of reducing agent used and high cost in existing nitrogen oxide exhaust gas treatment equipment.

[0014] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a fixed temperature energy-saving device for broadcasting of the utility model.

[0016] Reference numerals

[0017] 1. Equipment flange; 2. Short joint; 3. First concentric reducer; 4. Shell-and-tube heat exchanger; 5. Medium A inlet; 6. Medium A outlet; 7. Second concentric reducer; 8. Coil heat exchanger; 9. Pipe A; 10. Pipe B; 11. Pipe C; 12. Medium B inlet; 13. Medium B outlet; 14. Cylinder; 15. Screw device; 16. Steam drum; 17. Output pipe; 18. Drain. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] Example

[0021] Figure 1 It is a structural schematic diagram of an embodiment of a fixed temperature energy-saving device for broadcasting of the utility model. As shown in the figure, a fixed temperature energy-saving device for broadcasting includes a shell-and-tube heat exchanger 4, a coil heat exchanger 8, a cylinder 14 and a steam drum 16. The first concentric reducer 3 and the second concentric reducer 7 are respectively provided at both ends of the shell-and-tube heat exchanger 4. The first concentric reducer 3 is connected to the steam system through the equipment flange 1, and the second concentric reducer 7 is connected to the coil heat exchanger. The coil heat exchanger 8 is arranged on one side inside the cylinder 14, and a spiral device 15 for guiding flow is arranged on the other side inside the cylinder 14. The output end of the cylinder 14 is connected to the steam drum 16.

[0022] A short section 2 for connection is provided between the first concentric reducer 3 and the equipment flange 1 , and a pressure gauge P0 for measuring pressure is provided on the surface of the short section 2 .

[0023] The shell-and-tube heat exchanger 4 is provided with a medium A inlet 5 and a medium A outlet 6. The medium A inlet 5 is provided with a temperature measuring gauge T1 for measuring temperature and a pressure gauge P1 for measuring pressure.

[0024] A temperature measuring meter T2 for measuring temperature is arranged inside the second concentric reducer 7 , and a temperature measuring meter T3 for measuring temperature is arranged at the outlet of the second concentric reducer 7 .

[0025] The second concentric reducer 7 is provided with a connecting pipe, which is arranged inside the cylinder 14, and includes a connecting pipe A9, a connecting pipe B10, a connecting pipe C11, and a connecting pipe D. The connecting pipes A9, B10, C11, and D are arranged in a "cross shape". Ammonia, ammonia water, urea solution and other reducing agents enter from the connecting pipes A9, B10, C11, and D.

[0026] The coil heat exchanger 8 is provided with a medium B inlet 11 and a medium B outlet 13 .

[0027] The shell and tube heat exchanger 4 and the coil heat exchanger 8 are used to adjust the temperature of the water vapor so that the water vapor reaches the desired appropriate temperature.

[0028] Medium A and medium B include water, water vapor, etc. Medium A and medium B can be the same or different, and are selected according to actual needs. Medium A and medium B are conducive to the formation of gas-liquid saturated gas by reducing agents such as ammonia, thereby accelerating the reaction rate and reducing the amount of reducing agent used.

[0029] The drum 16 is provided with a pressure gauge P2 for measuring pressure, and the output end of the drum 16 is provided with an output pipe 17, and there are multiple output pipes 17. The drum 16 is also provided with a drain port 18 for draining water. The output pipe 17 can be connected to the flue, and can also be connected to other pipelines as needed.

[0030] The equipment is connected to the steam system through the equipment flange 1, and the steam enters the cylinder 14 of the energy-saving device. At the same time, reducing agents such as ammonia, ammonia water, and urea liquid enter the cylinder 14 from the pipes A9, B10, C11, and D, and then pass through the guide of the spiral device 15. At the same time, the texture on the surface of the spiral device 15 mixes various substances, and then enters the steam drum 16. Finally, the gas-liquid saturated gas is discharged from the output pipe 17. The gas-liquid saturated gas discharged from the output pipe 17 enters the flue and reacts with the nitrogen oxide waste gas to treat the waste gas so that the waste gas meets the emission indicators.

[0031] Taking the nitrogen oxide waste gas emission treatment of a chemical company’s boiler workshop as an example, the nitrogen oxide index of the boiler workshop flue gas emission is controlled at 50mk / m 3 The ammonia consumption of each boiler is 10t / d. After using this energy-saving device, the ammonia consumption is controlled at 5t / d, saving 150 tons of ammonia per month and saving 75,000 yuan in costs, greatly reducing costs.

[0032] Therefore, the utility model adopts a broadcast constant temperature energy-saving device with the above-mentioned structure. By mixing reducing agents such as ammonia, ammonia water, urea liquid, etc. from the ammonia supply system with superheated steam from the steam system, the nitrogen oxides in the exhaust gas are reduced, the reduction reaction rate is increased, the amount of reducing agent used is reduced, the cost is reduced, and energy is saved. It can solve the problem of large amount of reducing agent used and high cost in existing nitrogen oxide exhaust treatment equipment.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. A constant temperature energy-saving device for broadcasting, characterized in that: It includes a shell-and-tube heat exchanger, a coil heat exchanger, a cylinder and a steam drum. A first concentric reducer and a second concentric reducer are respectively provided at both ends of the shell-and-tube heat exchanger. The first concentric reducer is connected to the steam system through an equipment flange, and the second concentric reducer is connected to the coil heat exchanger. The coil heat exchanger is arranged on one side of the cylinder, and a spiral device for guiding flow is arranged on the other side of the cylinder. The output end of the cylinder is connected to the steam drum.

2. A constant temperature energy-saving device for broadcasting according to claim 1, characterized in that: A short section for connection is provided between the first concentric reducer and the equipment flange, and a pressure gauge P0 for measuring pressure is provided on the surface of the short section.

3. The radiated constant temperature energy-saving device according to claim 1 is characterized in that: The shell-and-tube heat exchanger is provided with a medium A inlet and a medium A outlet. The medium A inlet is provided with a temperature measuring gauge T1 for measuring temperature and a pressure gauge P1 for measuring pressure.

4. The radiated constant temperature energy-saving device according to claim 1, characterized in that: A temperature measuring meter T2 for measuring temperature is arranged inside the second concentric reducer, and a temperature measuring meter T3 for measuring temperature is arranged at the outlet of the second concentric reducer.

5. The radiated constant temperature energy-saving device according to claim 1 is characterized in that: The second concentric reducer is provided with a connecting pipe, which is arranged inside the cylinder. The connecting pipe includes a connecting pipe A, a connecting pipe B, a connecting pipe C, and a connecting pipe D. The connecting pipe A, the connecting pipe B, the connecting pipe C, and the connecting pipe D are distributed in a "cross shape".

6. The radiated constant temperature energy-saving device according to claim 1, characterized in that: The coil heat exchanger is provided with a medium B inlet and a medium B outlet.

7. The radiated constant temperature energy-saving device according to claim 1 is characterized in that: The interior of the drum is provided with a pressure gauge P2 for measuring pressure, the output end of the drum is provided with an output pipe, a plurality of output pipes are provided, and the drum is also provided with a drain port for draining water.

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