Energy-saving device for continuous reaction of 2, 2 '-dipyridyl

Abstract

The utility model belongs to 2. The utility model relates to the technical field of 2, 2 '-dipyridyl continuous reaction devices, in particular to an energy-saving device for 2, 2'-dipyridyl continuous reaction, which comprises a base, a heating mechanism mounted above the base, a reaction mechanism mounted inside the heating mechanism, a condensation mechanism mounted above the reaction mechanism, a first condenser mounted above the reaction mechanism, and a second condenser mounted above the condensation mechanism. The upper surface of the first condenser is fixedly connected with a second water outlet pipe, the tail end of the second water outlet pipe is fixedly connected with a second condenser, the upper surface of the second condenser is fixedly connected with a third water outlet pipe, and the tail end of the third water outlet pipe is provided with a cleaning mechanism. The tail end of the connecting pipe is fixedly connected with a water pump, and the tail end of the water pump is fixedly connected with a spray pipe. According to the utility model, two sections of condensation processes are combined, and finally, condensation wastewater is used for flushing the filter screen, so that the practicability of the device is improved, and energy is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of 2,2'-bipyridine continuous reaction device, in particular to an energy-saving device for 2,2'-bipyridine continuous reaction. Background Art

[0002] 2,2'-Bipyridine is a very important pyridine derivative. It is not only used to prepare coatings, chelating agents and paints, but also an important intermediate for the synthesis of medicines and pesticides, especially for the synthesis of diquat. Due to the increasing demand for 2,2'-bipyridine, the research on the green production technology of 2,2'-bipyridine has great industrial value and important social significance. The existing method for synthesizing 2,2-bipyridine by direct coupling of pyridine is to use anhydrous Raney nickel as a catalyst and continuously synthesize it in a conventional fixed bed reactor.

[0003] In the process of preparing 2,2'-bipyridine, the raw materials need to be heated. During the heating process, a condensing device needs to be placed above the reactor to condense the evaporated raw materials in the reactor into liquid and return to the reactor. In addition, in the subsequent raw material reaction process, the mixed liquid needs to be cooled. At this time, a condensing device is required. The condensation process of the existing device is divided into two stages, and each stage is condensed separately, which reduces the utilization rate of water resources and the practicality of the device. Summary of the invention

[0004] The utility model aims to provide an energy-saving device for continuous reaction of 2,2'-bipyridine, which combines two condensation processes and finally uses the condensed waste water to wash the filter screen, thereby improving the practicability of the device and saving energy; and can continuously prepare 2,2'-bipyridine and improve work efficiency.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide an energy-saving device for the continuous reaction of 2,2'-bipyridine, comprising a base, a heating mechanism is installed above the base, a reaction mechanism is installed inside the heating mechanism, a condensing mechanism is installed above the reaction mechanism, the condensing mechanism comprises a first condenser, the first condenser is installed above the reaction mechanism, a second water outlet pipe is fixedly connected to the upper surface of the first condenser, a second condenser is fixedly connected to the end of the second water outlet pipe, a third water outlet pipe is fixedly connected to the upper surface of the second condenser, a cleaning mechanism is installed at the end of the third water outlet pipe, the cleaning mechanism comprises a connecting pipe, one end of the connecting pipe is fixedly connected to the end of the third water outlet pipe, a water pump is fixedly connected to the end of the connecting pipe, and a nozzle is fixedly connected to the end of the water pump.

[0006] Optionally, a second water inlet pipe is fixedly connected to the upper surface of the first condenser, the second water inlet pipe is located on the right side of the second water outlet pipe, a fixing frame is fixedly connected to the surface of the first condenser, and an electric telescopic rod is fixedly connected to the lower surface of the fixing frame.

[0007] Optionally, the heating mechanism includes an outer shell, the lower surface of the outer shell is fixedly connected to the upper surface of the base with a water tank, the lower surface of the water tank is fixedly connected to a heating plate, the left surface of the water tank is fixedly connected to a first water inlet pipe, and the right surface of the water tank is fixedly connected to a first water outlet pipe.

[0008] Optionally, the reaction mechanism comprises a reactor, the upper surface of the reactor is fixedly connected with a feed trough, the right side surface of the feed trough is fixedly connected with a discharge pipe, and the surface of the discharge pipe is fixedly connected to the inner wall of the second condenser.

[0009] Optionally, a filtering mechanism is installed on the upper surface of the base, and the filtering mechanism includes a first motor, an output end of the first motor is fixedly connected to a first rotating shaft, a surface of the first rotating shaft is fixedly connected to a filter screen, and a lower surface of the filter screen is fixedly connected to a heating ring.

[0010] Optionally, a scraping mechanism is installed on the front side of the base, and the scraping mechanism includes a second motor, the back side of the second motor is fixedly connected to the front side of the base, the output end of the second motor is fixedly connected to a second rotating shaft, the surface of the second rotating shaft is fixedly connected to a scraper, and the lower surface of the scraper is in contact with the upper surface of the filter.

[0011] Optionally, a crushing mechanism is fixedly connected to the upper surface of the base, and the crushing mechanism is located on the right side of the scraper.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The present invention is provided with a first condenser, a second condenser, a water pump and a spray pipe. When in use, cold water is introduced into the first condenser from the second water inlet pipe on the left side of the first condenser, and the cold water flows out from the second water outlet pipe on the right end of the first condenser. Since the second water outlet pipe is long, the water loses a certain amount of heat in the process of flowing in the second water outlet pipe, and then flows into the second condenser fixed at the end of the second water outlet pipe to cool the discharge pipe in the second condenser, and then flows into the water pump above the base from the third water outlet pipe fixed above the second condenser. The water pump is started to pump water out from the end of the spray pipe. Since the spray pipe is located below the filter screen, the water sprayed from the spray pipe can clean the filter screen to prevent the large pieces of reactants remaining on the filter screen from affecting the next filtration. The utility model combines two condensation processes, and finally uses the condensation waste water to rinse the filter screen, thereby improving the practicality of the device and saving energy.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model is provided with a reaction kettle, a filter screen and a scraper. When in use, bipyridine, a catalyst, hypophosphorous acid and dihydrogen monoxide solution are added into the interior of the reaction kettle, the reaction kettle is placed in a water storage tank above a base, water is added into a first water inlet pipe fixed on the left surface of the water storage tank, and then a heating plate is started to heat the reaction kettle in a water bath, water is passed into a first condenser above the reaction kettle, and after heating for a certain period of time, an electric telescopic rod on a fixed frame fixed on the back of the first condenser is started to make the first condenser leave the reaction kettle, and potassium chloride is added into the interior of the reaction kettle to continue heating. After the heating is completed, the solution in the reaction kettle flows out from a discharge pipe fixed on the right side of the reaction kettle, and a second discharge pipe fixed on the left side of a second condenser fixed on the surface of the discharge pipe introduces water in the first condenser into the second condenser to cool the solution inside the discharge pipe, and discharges A plurality of filters are placed at the end of the material pipe, and the plurality of filters are fixedly connected to the first rotating shaft at the output end of the first motor fixed above the base. After a section of solution is discharged from the discharge pipe and filtered by the filter, the valve installed on the discharge pipe is closed, and at the same time, the heating ring fixed on the lower surface of the filter heats the filter, so that the water in the 2,2'-bipyridine on the surface of the filter evaporates and becomes solid. The first motor is started to rotate the filter by 90 degrees, and a new filter is replaced at the outlet of the discharge pipe. When the filter rotates to the bottom of the scraper after filtering, the second motor fixed on the front of the base is started, and the output end of the second motor drives the second rotating shaft to rotate counterclockwise. The scraper fixed on the surface of the second rotating shaft sends the 2,2'-bipyridine on the filter into the crushing mechanism on the right side of the scraper for collection. The utility model can continuously prepare 2,2'-bipyridine, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of a partially cutaway three-dimensional structure of the utility model from a first viewing angle;

[0019] Figure 3 It is a schematic diagram of a partially cutaway three-dimensional structure of the utility model from a second viewing angle;

[0020] Figure 4 For the utility model embodiment Figure 3Schematic diagram of the enlarged structure at point A in the middle.

[0021] In the figure: 1. base; 2. heating mechanism; 201. shell; 202. water storage tank; 203. heating plate; 204. first water inlet pipe; 205. first water outlet pipe; 3. reaction mechanism; 301. reaction kettle; 302. feed trough; 303. outlet pipe; 4. condensation mechanism; 401. first condenser; 402. fixing frame; 403. electric telescopic rod; 404. second water inlet pipe; 405. second water outlet pipe; 406. second condenser; 407. third water outlet pipe; 5. cleaning mechanism; 501. water pump; 502. connecting pipe; 503. nozzle; 6. filtering mechanism; 601. first motor; 602. first rotating shaft; 603. filter screen; 604. heating ring; 7. scraping mechanism; 701. second motor; 702. second rotating shaft; 703. scraper; 8. crushing mechanism. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] Reference Figure 1-4, the energy-saving device for the continuous reaction of 2,2'-bipyridine provided by the utility model embodiment is now described. An energy-saving device for the continuous reaction of 2,2'-bipyridine, comprising a base 1, a heating mechanism 2 is installed above the base 1, a reaction mechanism 3 is installed inside the heating mechanism 2, a condensing mechanism 4 is installed above the reaction mechanism 3, the condensing mechanism 4 comprises a first condenser 401, the first condenser 401 is installed above the reaction mechanism 3, a second water outlet pipe 405 is fixedly connected to the upper surface of the first condenser 401, a second condenser 406 is fixedly connected to the end of the second water outlet pipe 405, a third water outlet pipe 407 is fixedly connected to the upper surface of the second condenser 406, a cleaning mechanism 5 is installed at the end of the third water outlet pipe 407, the cleaning mechanism 5 comprises a connecting pipe 502, one end of the connecting pipe 502 is fixedly connected to the end of the third water outlet pipe 407, a water pump 501 is fixedly connected to the end of the connecting pipe 502, and a water pump 501 is fixedly connected to the end of the water pump 501. There is a nozzle 503, and cold water is passed into the first condenser 401 from the second water inlet pipe 404 on the left side of the first condenser 401, and the cold water flows out from the second water outlet pipe 405 at the right end of the first condenser 401. Since the second water outlet pipe 405 is relatively long, the water will lose a certain amount of heat during the flow in the second water outlet pipe 405, and then flow into the second condenser 406 fixed at the end of the second water outlet pipe 405 to cool the discharge pipe 303 in the second condenser 406, and then flow into the water pump 501 above the base 1 from the third water outlet pipe 407 fixed above the second condenser 406. The water pump 501 is started to pump water out from the end of the nozzle 503. Since the nozzle 503 is located below the filter screen 603, the water sprayed from the nozzle 503 can clean the filter screen 603 to prevent the large pieces of reactants remaining on the filter screen 603 from affecting the next filtration.

[0027] The upper surface of the first condenser 401 is fixedly connected with a second water inlet pipe 404, and the second water inlet pipe 404 is located on the right side of the second water outlet pipe 405. The surface of the first condenser 401 is fixedly connected with a fixing frame 402, and the lower surface of the fixing frame 402 is fixedly connected with an electric telescopic rod 403. The heating mechanism 2 includes a shell 201, and the lower surface of the shell 201 and the upper surface of the base 1 are fixedly connected with a water storage tank 202, and the lower surface of the water storage tank 202 is fixedly connected with a heating plate 203. The left surface of the water storage tank 202 is fixedly connected with the first water inlet pipe 204, and the right surface of the water storage tank 202 is fixedly connected with the first water outlet pipe 205. The heating mechanism 2 includes a shell 201, and the lower surface of the shell 201 and the upper surface of the base 1 are fixedly connected with the water storage tank 20 2, a heating plate 203 is fixedly connected to the lower surface of the water storage tank 202, a first water inlet pipe 204 is fixedly connected to the left surface of the water storage tank 202, a first water outlet pipe 205 is fixedly connected to the right surface of the water storage tank 202, a reaction mechanism 3 comprises a reaction kettle 301, a feed trough 302 is fixedly connected to the upper surface of the reaction kettle 301, a discharge pipe 303 is fixedly connected to the right surface of the feed trough 302, a surface of the discharge pipe 303 is fixedly connected to the inner wall of the second condenser 406, a filter mechanism 6 is installed on the upper surface of the base 1, the filter mechanism 6 comprises a first motor 601, a first rotating shaft 602 is fixedly connected to the output end of the first motor 601, a filter screen 603 is fixedly connected to the surface of the first rotating shaft 602, a filter screen 603 is fixedly connected to the lower surface of the filter screen 603 A heating ring 604 is provided, and a scraping mechanism 7 is installed on the front of the base 1. The scraping mechanism 7 includes a second motor 701. The back of the second motor 701 is fixedly connected to the front of the base 1. The output end of the second motor 701 is fixedly connected to the second rotating shaft 702. The surface of the second rotating shaft 702 is fixedly connected to a scraper 703. The lower surface of the scraper 703 is in contact with the upper surface of the filter 603. A crushing mechanism 8 is fixedly connected to the upper surface of the base 1. The crushing mechanism 8 is located on the right side of the scraper 703. Bipyridine, catalyst, hypophosphorous acid and dihydrogen monoxide solution are added to the interior of the reactor 301. The reactor 301 is placed in the water storage tank 202 above the base 1. Water is added to the first water inlet pipe 204 fixed on the left surface of the water storage tank 202, and then the heating plate is started. 203, the reactor 301 is heated in a water bath, water is passed to the first condenser 401 above the reactor 301, and after heating for a certain period of time, the electric telescopic rod 403 on the fixing frame 402 fixed on the back of the first condenser 401 is started to make the first condenser 401 leave the reactor 301, and then potassium chloride is added into the reactor 301, and the heating is continued. After the heating is completed, the solution in the reactor 301 flows out from the discharge pipe 303 fixed on the right side of the reactor 301, and the second water outlet pipe 405 fixed on the left side of the second condenser 406 fixed on the surface of the discharge pipe 303 introduces the water in the first condenser 401 into the second condenser 406 to cool the solution inside the discharge pipe 303. A plurality of filter screens 603 are placed at the end of the discharge pipe 303.The plurality of filters 603 are fixedly connected to the first rotating shaft 602 at the output end of the first motor 601 fixed above the base 1. After a portion of the solution is discharged from the discharge pipe 303 and filtered by the filter 603, the valve installed on the discharge pipe 303 is closed. At the same time, the heating ring 604 fixed on the lower surface of the filter 603 heats the filter 603, so that the water in the 2,2'-bipyridine on the surface of the filter 603 evaporates and becomes solid. The first motor 601 is started to rotate the filter 603 by 90 degrees, and a new filter 60 3 is replaced to the outlet of the discharge pipe 303. When the filter screen 603 after filtering is completed rotates to the bottom of the scraper 703, the second motor 701 fixed on the front of the base 1 is started, and the output end of the second motor 701 drives the second shaft 702 to rotate counterclockwise. The scraper 703 fixed on the surface of the second shaft 702 sends the 2,2'-bipyridine on the filter screen 603 to the crushing mechanism 8 on the right side of the scraper 703 for collection. The utility model can continuously prepare 2,2'-bipyridine, which improves the working efficiency.

[0028] Working principle: When the utility model is used, bipyridine, catalyst, hypophosphorous acid and dihydrogen monoxide solution are added to the interior of the reactor 301, the reactor 301 is placed in the water storage tank 202 above the base 1, water is added to the first water inlet pipe 204 fixed on the left surface of the water storage tank 202, and then the heating plate 203 is started to heat the reactor 301 in a water bath, and water is passed to the first condenser 401 above the reactor 301. After heating for a certain period of time, the electric telescopic rod 403 on the fixing frame 402 fixed on the back of the first condenser 401 is started to make the first condenser 401 leave the reactor 301, and then potassium chloride is added to the interior of the reactor 301, and the heating is continued. After the heating is completed, the solution in the reactor 301 is discharged from the reactor 301. The liquid flows out from the discharge pipe 303 fixed on the right side of the reactor 301. The second water outlet pipe 405 fixed on the left side of the second condenser 406 fixed on the surface of the discharge pipe 303 introduces the water in the first condenser 401 into the second condenser 406 to cool the solution inside the discharge pipe 303. A plurality of filter screens 603 are placed at the end of the discharge pipe 303. The plurality of filter screens 603 are fixedly connected to the first rotating shaft 602 at the output end of the first motor 601 fixed above the base 1. After a section of the solution is discharged from the discharge pipe 303 and filtered by the filter screen 603, the valve installed on the discharge pipe 303 is closed. At the same time, the heating ring 604 fixed on the lower surface of the filter screen 603 heats the filter screen 603, so that the water in the 2,2'-bipyridine on the surface of the filter screen 603 evaporates. The first motor 601 is started to rotate the filter screen 603 by 90°, and the new filter screen 603 is replaced at the outlet of the discharge pipe 303. When the filter screen 603 after filtering is completed rotates to the bottom of the scraper 703, the second motor 701 fixed on the front of the base 1 is started, and the output end of the second motor 701 drives the second rotating shaft 702 to rotate counterclockwise. The scraper 703 fixed on the surface of the second rotating shaft 702 sends the 2,2'-bipyridine produced on the filter screen 603 to the crushing mechanism 8 on the right side of the scraper 703 for collection. In addition, the utility model can continuously prepare 2,2'-bipyridine, which improves the working efficiency. Cold water is introduced into the first condenser 401 from the second water inlet pipe 404 on the left side of the first condenser 401, and the cold water is The water flows out from the second water outlet pipe 405 at the right end of the first condenser 401. Since the second water outlet pipe 405 is relatively long, the water will lose a certain amount of heat during the process of flowing in the second water outlet pipe 405, and then flow into the second condenser 406 fixed at the end of the second water outlet pipe 405 to cool the discharge pipe 303 in the second condenser 406, and then flow into the water pump 501 above the base 1 from the third water outlet pipe 407 fixed above the second condenser 406. The water pump 501 is started to spray water from the end of the nozzle 503. Since the nozzle 503 is located below the filter screen 603, the water sprayed from the nozzle 503 can clean the filter screen 603 to prevent the large pieces of reactants remaining on the filter screen 603 from affecting the next filtration.

[0029] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An energy-saving device for continuous reaction of 2,2'-bipyridine, comprising a base (1), characterized in that: A heating mechanism (2) is installed above the base (1), a reaction mechanism (3) is installed inside the heating mechanism (2), a condensing mechanism (4) is installed above the reaction mechanism (3), and the condensing mechanism (4) comprises a first condenser (401), the first condenser (401) is installed above the reaction mechanism (3), a second water outlet pipe (405) is fixedly connected to the upper surface of the first condenser (401), and a second water outlet pipe (405) is fixedly connected to the end of the second water outlet pipe (405). The second condenser (406) is fixedly connected to a third water outlet pipe (407) on its upper surface, a cleaning mechanism (5) is installed at the end of the third water outlet pipe (407), and the cleaning mechanism (5) comprises a connecting pipe (502), one end of the connecting pipe (502) is fixedly connected to the end of the third water outlet pipe (407), the end of the connecting pipe (502) is fixedly connected to a water pump (501), and the end of the water pump (501) is fixedly connected to a nozzle (503).

2. The energy-saving device for continuous reaction of 2,2'-bipyridine according to claim 1, characterized in that: The upper surface of the first condenser (401) is fixedly connected to a second water inlet pipe (404), the second water inlet pipe (404) is located on the right side of the second water outlet pipe (405), the surface of the first condenser (401) is fixedly connected to a fixing frame (402), and the lower surface of the fixing frame (402) is fixedly connected to an electric telescopic rod (403).

3. The energy-saving device for continuous reaction of 2,2'-bipyridine according to claim 1, characterized in that: The heating mechanism (2) comprises a shell (201), the lower surface of the shell (201) and the upper surface of the base (1) are fixedly connected to a water tank (202), the lower surface of the water tank (202) is fixedly connected to a heating plate (203), the left side surface of the water tank (202) is fixedly connected to a first water inlet pipe (204), and the right side surface of the water tank (202) is fixedly connected to a first water outlet pipe (205).

4. The energy-saving device for continuous reaction of 2,2'-bipyridine according to claim 1, characterized in that: The reaction mechanism (3) comprises a reaction kettle (301), the upper surface of the reaction kettle (301) is fixedly connected to a feed trough (302), the right side surface of the feed trough (302) is fixedly connected to a discharge pipe (303), and the surface of the discharge pipe (303) is fixedly connected to the inner wall of the second condenser (406).

5. The energy-saving device for continuous reaction of 2,2'-bipyridine according to claim 1, characterized in that: A filtering mechanism (6) is installed on the upper surface of the base (1), and the filtering mechanism (6) comprises a first motor (601), the output end of the first motor (601) is fixedly connected to a first rotating shaft (602), the surface of the first rotating shaft (602) is fixedly connected to a filter screen (603), and the lower surface of the filter screen (603) is fixedly connected to a heating ring (604).

6. The energy-saving device for continuous reaction of 2,2'-bipyridine according to claim 1, characterized in that: A scraping mechanism (7) is installed on the front side of the base (1), and the scraping mechanism (7) comprises a second motor (701), the back side of the second motor (701) is fixedly connected to the front side of the base (1), the output end of the second motor (701) is fixedly connected to a second rotating shaft (702), the surface of the second rotating shaft (702) is fixedly connected to a scraper (703), and the lower surface of the scraper (703) is in contact with the upper surface of the filter screen (603).

7. The energy-saving device for continuous reaction of 2,2'-bipyridine according to claim 1, characterized in that: A crushing mechanism (8) is fixedly connected to the upper surface of the base (1), and the crushing mechanism (8) is located on the right side of the scraper (703).

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