Synthesis gas heat recycling device

Abstract

The utility model discloses a synthesis gas heat recycling device, which relates to the field of heat recycling and comprises a synthesis tower, a synthesis gas outlet pipe is mounted in the center of the top of the synthesis tower, a second gas outlet pipe and a first gas outlet pipe are respectively mounted on two sides of the synthesis gas outlet pipe, and an inlet and outlet heat exchanger is mounted on the side edge of the synthesis tower. And a boiler water preheater is arranged on the other side of the synthesis tower. According to the synthesis gas heat recycling device disclosed by the utility model, the boiler water preheater and the heat sharing pipe are additionally arranged, so that heat which is originally lost can be effectively recycled and is used for heating boiler water, the energy utilization rate is improved, the energy consumption in the whole methanol synthesis process is reduced, and the energy consumption is reduced by recycling the synthesis gas heat. And the requirement on external energy is reduced, so that the heat efficiency of the whole methanol synthesis system is improved, the production cost is reduced, and the requirements of energy conservation and emission reduction are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat recycling field, especially in synthetic gas heat recycling device. BACKGROUND

[0002] The limited methanol concentration of Davy methanol synthesis process export means that in order to obtain the target output of methanol, a large amount of circulating gas needs to be handled, and the compression of circulating gas needs to consume more energy, which increases the energy consumption and operating cost of the whole production process, and at the same time, the raw material gas requirement is higher.

[0003] Although Davy technology has certain raw material adaptability, but the purity and composition of raw material gas still have higher requirements, the sulfur content in raw material gas must be strictly controlled, otherwise the catalyst will be poisoned and deactivated, in order to meet these requirements, a complex raw material gas desulfurization system needs to be equipped, which increases the equipment investment and operating cost, and the existing synthetic tower equipment structure is complex, the equipment system of Davy methanol synthesis process is relatively complex, the axial flow steam rising type synthetic tower structure is complex and difficult to manufacture, and the complex heat exchange and separation device, the design, manufacture and maintenance of these equipment are more difficult, and the technical level of the operator is higher, once the equipment fails, the repair and recovery production time may be longer, which affects the continuity and stability of production, such as the heat exchange effect of water cooler decreases, which leads to the high temperature of crude methanol at the outlet of the separator, which brings a series of vicious cycle reactions, and seriously affects the methanol yield and quality.

[0004] Therefore, it is necessary to provide a synthetic gas heat recovery device to solve the above problems. INVENTION CONTENTS

[0005] The main purpose of the utility model is to provide a synthetic gas heat recovery device, which can effectively solve the problems in the background art.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] A synthetic gas heat recovery device, comprising a synthetic tower, a synthetic gas outlet pipe is installed in the middle of the top of the synthetic tower, a second outlet pipe and a first outlet pipe are installed on both sides of the synthetic gas outlet pipe, an inlet and outlet heat exchanger is installed on the side of the synthetic tower, and a boiler water preheater is arranged on the other side of the synthetic tower.

[0008] A treatment assembly is installed at the bottom of the boiler water preheater, a U-shaped pipe is installed in the inner cavity of the treatment assembly, an air induction assembly is installed on the outer wall of the U-shaped pipe, a second gear is rotatably connected to the side of the top of the air induction assembly, a first gear is engaged on the side of the second gear, and a first bevel gear is arranged at the bottom of the first gear.

[0009] The outer wall of the U-shaped pipe is provided with a filtering assembly, a second bevel gear is rotatably connected in the inner cavity of the filtering assembly, a filtering screen is arranged in the center of the inner cavity of the second bevel gear, and the outer wall of the filtering screen is attached with a scraper.

[0010] Preferably, the bottom of the second gas outlet pipe is arranged on the top of the inlet-outlet heat exchanger, the bottom of the inlet-outlet heat exchanger is provided with an air inlet pipe, the other end of the air inlet pipe is arranged on the bottom of the synthesis tower, the top and bottom of the outer wall of the inlet-outlet heat exchanger are respectively provided with an air cooler connecting pipe and a fresh gas inlet pipe, and the outer walls of the second gas outlet pipe, the air inlet pipe, the air cooler connecting pipe and the fresh gas inlet pipe are flange-connected with first valves and first flow valves.

[0011] Preferably, the bottom of the first gas outlet pipe penetrates through the top of the processing assembly and is arranged on one end of the U-shaped pipe, the outer wall of the boiler water preheater is respectively provided with a drain pipe and a heat sharing pipe, the other end of the heat sharing pipe is arranged on the outer wall of the inlet-outlet heat exchanger, and the outer walls of the first gas outlet pipe, the drain pipe and the heat sharing pipe are flange-connected with second valves and second flow valves.

[0012] Preferably, temperature sensors are arranged on the synthesis tower and the boiler water preheater, one of the temperature sensors is used for monitoring the temperature of the synthesis gas at the synthesis gas outlet pipe, and the other temperature sensor is used for monitoring the temperature in the inner cavity of the boiler water preheater.

[0013] Preferably, a gear ring is rotatably connected in the center of the inner cavity of the air induction assembly, an air induction fan is arranged in the inner cavity of the gear ring, the inner cavities of the gear ring and the first gas outlet pipe and the U-shaped pipe are communicated, and the other end of the U-shaped pipe is arranged on the center of the bottom of the boiler water preheater.

[0014] Preferably, a third gear is arranged on the bottom of the second gear through a connecting shaft, the third gear is rotatably connected to the side of the inner cavity of the air induction assembly, the third gear is engaged with the gear ring, a servo motor is arranged on the side of the air induction assembly, the bottom of the servo motor is provided with a first gear and a first bevel gear through a rotating shaft, and the first gear is engaged with the second gear.

[0015] Preferably, the first bevel gear extends into the inner cavity of the filtering assembly, the first bevel gear is engaged with the second bevel gear, and ball bearings are arranged on both ends of the second bevel gear.

[0016] Preferably, the scraper is arranged in the inner cavity of the filtering assembly, a through groove is arranged on the side of the inner cavity of the filtering assembly, and a mounting plate is arranged on the side of the filtering assembly.

[0017] Preferably, the installation plate is located at the side of the through slot, and the installation plate is used for cleaning the sundries in the inner cavity of the through slot after being removed.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1、the synthetic gas heat recycling device, the synthetic gas temperature of the synthetic tower outlet is higher, contains a large amount of heat energy, in traditional process, this part of heat may not be fully utilized and be discharged or be wasted in subsequent cooling process, this device can effectively recover the originally dissipated heat for heating boiler water by increasing the boiler water preheater and heat sharing pipe, improve the energy utilization rate, reduce the energy consumption of the whole synthetic methanol process, through the recovery of synthetic gas heat, reduce the demand for external energy, thereby improve the thermal efficiency of the whole methanol synthesis system, which not only helps to reduce production cost, but also meets the requirements of energy saving and emission reduction, and has important significance for improving the economic benefit and environmental benefit of enterprises.

[0020] 2、the synthetic gas heat recycling device, by increasing the first gas pipe and the heat sharing pipe, the flow direction of the synthetic gas can be flexibly adjusted according to actual demand, in the case that the synthetic gas temperature is too high or too low or the overall load changes, the synthetic gas amount entering the boiler water preheater can be controlled based on the flow of the first gas pipe and the heat sharing pipe, so as to ensure the heat recovery effect and stable operation of the device, the flexible design can better adapt to different production conditions, improve the adaptability and reliability of the system, the first gas pipe and the inlet and outlet heat exchanger cooperate with each other to form a more perfect heat exchange system, the inlet and outlet heat exchanger is mainly used for heat exchange of the synthetic gas at the inlet and outlet of the synthetic tower, so as to improve the gas temperature entering the synthetic tower, thereby improving the reaction efficiency, and the addition of the first gas pipe and the boiler water preheater further utilizes the waste heat of the synthetic gas, so that the heat is more fully utilized in the device, and the heat distribution and utilization of the whole process are optimized.

[0021] 3、the synthetic gas heat recycling device, in traditional process, the inlet and outlet heat exchanger bears all synthetic gas heat exchange tasks, which is easy to cause excessive load, affect the service life and heat exchange efficiency, after adding the boiler water preheater, a part of heat exchange tasks can be shared, the load of the boiler water preheater is reduced, the service life is prolonged, and the stability and reliability of the whole device are improved.

[0022] 4. This syngas heat recovery and utilization device, by activating the servo motor, can drive the induced draft fan to quickly introduce syngas into the inner cavity of the boiler water preheater during syngas heat recovery, thereby improving the syngas heat recovery efficiency. The set scraper can filter impurities from the syngas. The set second bevel gear can be driven by the first bevel gear, thereby driving the filter screen to rotate. After the filter screen rotates, it will contact the scraper, so that the scraper can scrape off the impurities adhering to the filter screen, thereby improving the working efficiency of the filter screen. By removing the set inspection plate and mounting plate, the impurities remaining in the inner cavity of the channel can be cleaned. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the boiler water preheater of this utility model;

[0025] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of the air intake component of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the filter assembly of this utility model.

[0028] In the diagram: 1. Synthesis tower; 2. Synthesis gas outlet pipe; 3. Temperature sensor; 4. Inlet pipe; 5. Inlet and outlet heat exchangers; 6. Air cooler connecting pipe; 7. Fresh gas inlet pipe; 8. First outlet pipe; 9. Boiler water preheater; 10. Drain pipe; 11. Processing component; 12. U-shaped pipe; 13. Filter component; 14. Servo motor; 15. Exhaust fan component; 16. First gear; 17. First bevel gear; 18. Second gear; 19. Third gear; 20. Gear ring; 21. Exhaust fan; 22. Second bevel gear; 23. Ball bearing; 24. Filter screen; 25. Scraper; 26. Through groove; 27. Mounting plate; 28. Inspection plate; 29. ​​Second outlet pipe; 30. Heat distribution pipe. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0030] Example 1:

[0031] like Figure 1 , Figure 2As shown, a syngas heat recovery and utilization device includes a synthesis tower 1. A syngas outlet pipe 2 is installed at the center of the top of the synthesis tower 1. A second outlet pipe 29 and a first outlet pipe 8 are respectively installed on both sides of the syngas outlet pipe 2. An inlet and outlet heat exchanger 5 is installed on the side of the synthesis tower 1. A boiler water preheater 9 is installed on the other side of the synthesis tower 1. The bottom of the second outlet pipe 29 is installed at the top of the inlet and outlet heat exchanger 5. An inlet pipe 4 is installed at the bottom of the inlet and outlet heat exchanger 5. The other end of the inlet pipe 4 is installed at the bottom of the synthesis tower 1. An air cooler connecting pipe 6 and a fresh gas inlet pipe 7 are respectively installed at the top and bottom of the outer wall of the inlet and outlet heat exchanger 5. The second outlet pipe 29, the inlet pipe 4, the air cooler connecting pipe 6, and the fresh gas inlet pipe 7 are connected together. The outer wall of the gas pipe 7 is flanged with a first valve and a first flow valve. The bottom of the first gas outlet pipe 8 passes through the top of the processing assembly 11 and is installed at one end of the U-shaped pipe 12. The outer wall of the boiler water preheater 9 is respectively equipped with a drain pipe 10 and a heat sharing pipe 30. The other end of the heat sharing pipe 30 is installed on the outer wall of the inlet and outlet heat exchanger 5. The outer walls of the first gas outlet pipe 8, the drain pipe 10 and the heat sharing pipe 30 are flanged with a second valve and a second flow valve. Temperature sensors 3 are installed at both the synthesis tower 1 and the boiler water preheater 9. One temperature sensor 3 is used to monitor the temperature of the synthesis gas at the synthesis gas outlet pipe 2, and the other temperature sensor 3 is used to monitor the temperature inside the boiler water preheater 9.

[0032] Example 2:

[0033] like Figure 1 , Figure 3 , Figure 4 As shown, a syngas heat recovery and utilization device includes a processing component 11 installed at the bottom of a boiler water preheater 9. A U-shaped tube 12 is installed inside the processing component 11, and an induced draft assembly 15 is installed on the outer wall of the U-shaped tube 12. A second gear 18 is rotatably connected to the top side of the induced draft assembly 15, and a first gear 16 meshes with the side of the second gear 18. A first bevel gear 17 is located at the bottom of the first gear 16. A gear ring 20 is rotatably connected to the center of the inner cavity of the induced draft assembly 15, and an induced draft fan 21 is installed inside the inner cavity of the gear ring 20. The ring 20 communicates with the inner cavity of the first air outlet pipe 8 and the U-shaped pipe 12. The other end of the U-shaped pipe 12 is installed in the center of the bottom of the boiler water preheater 9. The bottom of the second gear 18 is equipped with a third gear 19 through a connecting shaft. The third gear 19 is rotatably connected to the side of the inner cavity of the induced draft assembly 15. The third gear 19 meshes with the gear ring 20. A servo motor 14 is installed on the side of the induced draft assembly 15. The bottom of the servo motor 14 is equipped with a first gear 16 and a first bevel gear 17 through a rotating shaft. The first gear 16 meshes with the second gear 18.

[0034] Example 3:

[0035] like Figure 1 ,Figure 3 、 Figure 5 As shown in figure 1, a kind of synthetic gas heat recycling device, the outer wall of U-shaped tube 12 is equipped with filter assembly 13, the inner cavity of filter assembly 13 is rotatably connected with second bevel gear 22, the median of the inner cavity of second bevel gear 22 is equipped with filter screen 24, the outer wall of filter screen 24 is attached with scraper 25, first bevel gear 17 extends to the inner cavity of filter assembly 13, first bevel gear 17 is engaged with second bevel gear 22, the both ends of second bevel gear 22 are equipped with ball bearing 23, scraper 25 is installed in the inner cavity of filter assembly 13, the side of the inner cavity of filter assembly 13 is provided with through slot 26, the side of filter assembly 13 is equipped with mounting plate 27, mounting plate 27 is located in the side of through slot 26, and mounting plate 27 is used to clean the sundries in the inner cavity of through slot 26 after being removed, and the side of processing assembly 11 is equipped with maintenance plate 28.

[0036] It should be noted that the utility model is a kind of synthetic gas heat recycling device, when using, air cooler connecting pipe 6 is connected with air cooler, synthetic tower 1 is connected with the outlet pipe 2 of synthetic gas, the temperature of synthetic gas is monitored according to temperature sensor 3 at synthetic tower 1, second outlet pipe 29 is closed, synthetic gas is input into boiler water preheater 9, servo motor 14 is started, first gear 16 and first bevel gear 17 are driven to rotate, first gear 16 is engaged with second gear 18 after rotating, second gear 18 drives third gear 19 to rotate, third gear 19 is engaged with gear ring 20 after rotating, and drives induced fan 21 to rotate, so that synthetic gas is quickly introduced into the inner cavity of boiler water preheater 9, and the sundries are filtered after synthetic gas passes through filter screen 24, when first bevel gear 17 rotates, it is engaged with second bevel gear 22, at this time, second bevel gear 22 drives filter screen 24 to rotate, after filter screen 24 contacts with scraper 25, scraper 25 scrapes off the sundries, so that the sundries can fall into the inner cavity of through slot 26, and when second bevel gear 22 rotates, ball bearing 23 rolls in the inner cavity of filter assembly 13.

[0037] When synthetic gas enters the inner cavity of boiler water preheater 9, it can heat boiler water, at this time, heat recovery of synthetic gas can be carried out.

[0038] At the same time, second outlet pipe 29 can be opened, and a part of synthetic gas is divided into inlet and outlet heat exchanger 5, when the working load of inlet and outlet heat exchanger 5 is large, excess synthetic gas is input into boiler water preheater 9 for preheating treatment through heat sharing pipe 30.

[0039] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A synthesis gas heat recovery device comprising a synthesis column (1), characterized in that: The central top of the synthesis tower (1) is provided with a synthesis gas outlet pipe (2), and the two sides of the synthesis gas outlet pipe (2) are respectively provided with a second outlet pipe (29) and a first outlet pipe (8); the side of the synthesis tower (1) is provided with an inlet and outlet heat exchanger (5); and the other side of the synthesis tower (1) is provided with a boiler water preheater (9). The bottom of the boiler water preheater (9) is provided with a processing assembly (11), the inner cavity of the processing assembly (11) is provided with a U-shaped pipe (12), the outer wall of the U-shaped pipe (12) is provided with an air induction assembly (15), the side of the top of the air induction assembly (15) is rotationally connected with a second gear (18), the side of the second gear (18) is engaged with a first gear (16), and the bottom of the first gear (16) is provided with a first bevel gear (17). The outer wall of the U-shaped pipe (12) is provided with a filtering assembly (13), the inner cavity of the filtering assembly (13) is rotationally connected with a second bevel gear (22), the inner cavity of the second bevel gear (22) is provided with a filter screen (24) in the middle, and the outer wall of the filter screen (24) is attached with a scraper (25).

2. The syngas heat recycling device according to claim 1, characterized in that: The bottom of the second outlet pipe (29) is arranged on the top of the inlet and outlet heat exchanger (5), the bottom of the inlet and outlet heat exchanger (5) is provided with an inlet pipe (4), the other end of the inlet pipe (4) is arranged on the bottom of the synthesis tower (1), the top and bottom of the outer wall of the inlet and outlet heat exchanger (5) are respectively provided with an air cooler connecting pipe (6) and a fresh gas inlet pipe (7), and the outer walls of the second outlet pipe (29), the inlet pipe (4), the air cooler connecting pipe (6) and the fresh gas inlet pipe (7) are all flange-connected with first valves and first flow valves.

3. The syngas heat recycling device according to claim 1, characterized in that: The bottom of the first outlet pipe (8) penetrates the top of the processing assembly (11) and is arranged on one end of the U-shaped pipe (12), the outer wall of the boiler water preheater (9) is respectively provided with a drain pipe (10) and a heat sharing pipe (30), the other end of the heat sharing pipe (30) is arranged on the outer wall of the inlet and outlet heat exchanger (5), and the outer walls of the first outlet pipe (8), the drain pipe (10) and the heat sharing pipe (30) are all flange-connected with second valves and second flow valves.

4. The syngas heat recovery device of claim 1, wherein: Temperature sensors (3) are arranged at the synthesis tower (1) and the boiler water preheater (9), one of the temperature sensors (3) is used for monitoring the temperature of the synthesis gas at the synthesis gas outlet pipe (2), and the other temperature sensor (3) is used for monitoring the temperature in the inner cavity of the boiler water preheater (9).

5. The syngas heat recovery device of claim 1, wherein: The inner cavity of the air induction assembly (15) is rotationally connected with a gear ring (20) in the middle, the inner cavity of the gear ring (20) is provided with an air induction fan (21), the gear ring (20) is communicated with the inner cavities of the first outlet pipe (8) and the U-shaped pipe (12), and the other end of the U-shaped pipe (12) is arranged in the middle of the bottom of the boiler water preheater (9).

6. The syngas heat recovery device of claim 1, wherein: The bottom of the second gear (18) is provided with a third gear (19) mounted through a connecting shaft, the third gear (19) is rotatably connected to the side of the inner cavity of the air guiding assembly (15), the third gear (19) is engaged with a gear ring (20), the side of the air guiding assembly (15) is provided with a servo motor (14), the bottom of the servo motor (14) is provided with a first gear (16) and a first bevel gear (17) mounted through a rotating shaft, and the first gear (16) is engaged with the second gear (18).

7. A syngas heat recovery device according to claim 6, wherein: The first bevel gear (17) extends into the inner cavity of the filtering assembly (13), and the first bevel gear (17) is engaged with a second bevel gear (22), both ends of the second bevel gear (22) are provided with ball bearings (23).

8. The syngas heat recovery device of claim 1, wherein: The scraper (25) is mounted in the inner cavity of the filtering assembly (13), a through groove (26) is formed in the side of the inner cavity of the filtering assembly (13), and the side of the filtering assembly (13) is provided with a mounting plate (27).

9. A syngas heat recovery device according to claim 8, wherein: The mounting plate (27) is located at the side of the through groove (26), the mounting plate (27) is used for cleaning sundries in the inner cavity of the through groove (26) after being removed, and the side of the processing assembly (11) is provided with an inspection plate (28).

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