Partitioned temperature control urea hydrolysis reactor

Abstract

The utility model relates to the technical field of ammonia preparation through urea solution hydrolysis, in particular to a urea hydrolysis reactor with zoned temperature control, which comprises a tank body, a plurality of partition plates are arranged in the tank body, the partition plates divide the interior of the tank body into partition bins along the length direction of the tank body, and a heat exchanger is arranged at the bottom of the tank body and penetrates through the partition plates. A rotary spraying device is arranged in the tank body in the length direction of the tank body, one end of the rotary spraying device penetrates through one end of the tank body, and a driving device capable of driving the rotary spraying device is arranged at the top of the tank body. The rotary spraying device rotates in the tank body, the rotary spraying device is connected with external cleaning liquid, the cleaning liquid can be sprayed to the inner wall of the tank body and inlets and outlets of other equipment or materials, it is ensured that the cleaning liquid can clean crystals in the tank body and discharge the crystals from the drain outlet, long-term existence of the crystals is avoided, and the service life of the tank body is prolonged. Therefore, the service life of the device is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to urea solution hydrolysis ammonia production technical field, concretely is a zoned temperature control's urea hydrolysis reactor. BACKGROUND

[0002] With the higher and higher requirement of the state to the safe operation of the thermal power plant, the thermal power plant is gradually adopting the urea with higher safety factor as the denitration reducing agent to replace the liquid ammonia with high risk coefficient, the change of reducing agent makes that ammonia production process also changes accordingly, and the urea hydrolysis reactor becomes the indispensable necessary equipment.

[0003] The existing patent number CN202022711225.1 discloses a zoned control's urea hydrolysis reactor, including hydrolysis reactor tank body, the hydrolysis reactor tank body is arranged with a plurality of components partitioning plate for separating the hydrolysis reactor tank body from front to back into a plurality of compartments, a feed inlet, a blowdown port, a liquid level meter interface and a thermometer interface are arranged on each compartment; the hydrolyysis reactor tank body is installed with steam coil at the bottom.The zoned control's urea hydrolysis reactor can accurately control the number of different compartments to produce the required amount of ammonia according to the different NOx concentrations of the unit under different loads during the specific operation.The utility model can accurately produce ammonia according to the actual demand of different compartments of solution, which can maintain the quality of steam unchanged and reduce the solution amount, thereby effectively improving the efficiency.

[0004] Although the above-mentioned patent effectively improves the efficiency of ammonia production, there may still be local crystallization and corrosion risk under certain working conditions, especially when the temperature and pressure control are not accurate, or when the urea hydrolysis reactor stops working, internal crystallization may occur due to temperature reduction, which may adhere to the inner wall of the reactor, pipeline and valve, causing blockage and corrosion. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem of overcoming the prior art, provides a zoned temperature control's urea hydrolysis reactor, which can drive the rotary spraying device to rotate inside the tank body by starting the driving device, the rotary spraying device is connected with the external cleaning liquid, which can spray the cleaning liquid to the inner wall of the tank body and the inlet and outlet of other equipment or materials, ensuring that the cleaning liquid can flush the crystallization in the tank body clean, and discharge from the blowdown port.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a kind of partition temperature control urea hydrolysis reactor, including tank body, multiple partitions are arranged inside the tank body, the partition is separated into partition storehouse along the length direction of tank body inside, heat exchanger is arranged in the bottom of tank body and penetrates multiple partitions, rotating spray device is arranged along the length direction of tank body inside, one end of rotating spray device penetrates one end of tank body and is arranged, the top of tank body is provided with the driving device capable of driving rotating spray device.

[0008] Preferably, the heat exchanger includes heat exchange tubes arranged at the bottom of the tank body, one end of the heat exchange tubes penetrates one end of the tank body, and the tank body is provided with a head connected to the heat exchange tubes outside.

[0009] Preferably, the rotating spray device includes a rotating tube, one end of the rotating tube penetrates one end of the tank body through a bearing, and a plurality of spherical nozzles are uniformly arranged on the rotating tube, with multiple angle spray holes on the spherical nozzles.

[0010] Preferably, the rotating tube is provided with a medium inlet at one end outside the tank body, and the tank body is provided with a high-temperature steam generator capable of being connected to the medium inlet outside.

[0011] Preferably, the rotating tube is provided with a medium inlet at one end outside the tank body, and the tank body is provided with an acetic acid solution storage device capable of being connected to the medium inlet outside.

[0012] Preferably, the driving device includes a motor, and the power output end of the motor is connected to one end of the rotating tube outside the tank body through a transmission belt.

[0013] Preferably, the top of the tank body is provided with a plurality of temperature and pressure combination indicator connection ports and product gas output ports, the bottom of the tank body is provided with a plurality of blowdown ports respectively communicating with the partition storehouses, the sidewall of the tank body is provided with a plurality of liquid inlet ports respectively communicating with the partition storehouses, the partitions are located below the rotating spray device, the rotating spray device is located in the upper middle part of the tank body, the top of the partition is provided with a supporting seat, and the supporting seat is provided with a supporting wheel capable of supporting the rotating spray device.

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

[0015] 1、The utility model has the advantages of simple structure, which can drive the rotating spray device to rotate inside the tank body by starting the driving device. The rotating spray device is connected to the cleaning liquid outside, which can spray the cleaning liquid to the inner wall of the tank body and the inlet and outlet of other equipment or materials. The cleaning liquid can flush the crystals in the tank body clean, and then discharge from the blowdown port, avoiding the long-term existence of crystals and causing corrosion of the inside of the device, ensuring the service life of the device.

[0016] 2、The supporting seat and the supporting wheel on the supporting seat can support the rotating spraying device, avoid the rotating spraying device from contacting the partition plate, and ensure the service life of the device.

[0017] 3、The rotating rod is connected with the high-temperature steam generator at one end outside the tank body, so that the high-temperature steam generated by the high-temperature steam generator can be sprayed to the inner wall of the tank body through the rotating rod, and the multiple spherical nozzles arranged above the middle part of the multiple separated compartments can ensure that the high-temperature steam completely sprays the inside of the tank body, completely removes the crystals in the tank body, ensures the service life of the device, and avoids the device from being corroded by the crystals.

[0018] 4、The pump body pumps the acetic acid solution into the rotating pipe, and under the driving of the motor, the rotating pipe rotates in the tank body, so that the acetic acid solution in the rotating pipe can continuously spray the inner wall of the tank body and the equipment in the tank body through the multi-angle nozzles of the spherical nozzles, and after continuous soaking, the crystals in the tank body are completely dissolved, and then clean water is pumped into the rotating pipe to clean the inside of the tank body. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the overall structure of the utility model Figure 1 ;

[0020] Figure 2 is a schematic view of the overall structure of the utility model Figure 2 ;

[0021] Figure 3 is a sectional view of the utility model;

[0022] Figure 4 is a schematic view of the internal structure of the utility model;

[0023] Figure 5 is a schematic view of the local structure of the utility model. Figure 4

[0024] In the drawing: 1, tank body; 2, partition plate; 3, base; 4, temperature and pressure combination indicator port; 5, liquid inlet; 6, pollution outlet; 7, product gas outlet; 8, heat exchange pipe; 9, end; 10, rotating pipe; 11, motor; 12, transmission belt; 13, medium inlet; 14, spherical nozzle; 15, supporting seat; 16, supporting wheel. DETAILED DESCRIPTION

[0025] ​Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of the utility model protection.

[0026] Embodiment one

[0027] A partition temperature control urea hydrolysis reactor, structure as Figures 1-5 As shown in the figure, including the tank body 1, the tank body 1 inside is provided with multiple partitions 2, the partition 2 is along the length direction of tank body 1 and is divided into separate warehouses in tank body 1, the tank body 1 bottom is provided with heat exchanger through multiple partitions 2, the tank body 1 inside is provided with rotating spray device along its length direction, one end of the rotating spray device is provided through one end of the tank body 1, the tank body 1 top is provided with the drive device capable of driving rotating spray device. The tank body 1 top is provided with multiple temperature and pressure combination indicator connection ports 4 and product gas output port 7, the tank body 1 bottom is provided with multiple respectively with separate warehouse intercommunication blowdown port 6, the tank body 1 side wall is provided with multiple respectively with separate warehouse intercommunication liquid inlet 5, the partition 2 is below the rotating spray device, the rotating spray device is located in the upper part of the tank body 1, the partition 2 top is provided with the bearing seat 15, the bearing seat 15 is provided with the bearing wheel 16 capable of bearing rotating spray device.

[0028] In the case of inaccurate temperature and pressure control, or when the urea hydrolysis reactor stops working, the tank body 1 inside may also produce crystallization due to temperature reduction, which may adhere to the inner wall of the tank body 1, the temperature and pressure combination indicator connection port 4, the product gas output port 7, the blowdown port 6 and the liquid inlet 5, causing blockage. Long-term cleaning can cause corrosion and reduce the service life of the device. After the hydrolysis reaction is completed, the driving device is started to drive the rotating spray device to rotate inside the tank body 1. The rotating spray device is connected to the external cleaning liquid, which can spray the cleaning liquid to the inner wall of the tank body 1 and other equipment or material inlet and outlet, ensuring that the cleaning liquid can flush the crystallization inside the tank body 1 clean, and avoid the long-term existence of crystallization, which can cause corrosion inside the device, ensuring the service life of the device.

[0029] Since the rotating spraying device penetrates through the multiple partition compartments, the inside of the tank body 1 can be thoroughly cleaned. Since the rotating spraying device is arranged on the top of the partition plate 2 and needs to rotate during operation, the friction between the rotating spraying device and the partition plate 2 is avoided to prevent damage. The supporting seat 15 and the supporting wheel 16 on the supporting seat 15 can support the rotating spraying device, avoid the contact between the rotating spraying device and the partition plate 2, and ensure the service life of the device.

[0030] The heat exchanger comprises heat exchange pipes 8 arranged at the bottom of the tank body 1. One end of the heat exchange pipes 8 penetrates through one end of the tank body 1. An end head 9 connected with the heat exchange pipes 8 is arranged outside the tank body 1. The end head 9 can control the in and out of the high-temperature medium in the heat exchange pipes 8, so as to control the temperature inside the tank body 1 under different working loads.

[0031] The rotating spraying device comprises a rotating pipe 10. One end of the rotating pipe 10 penetrates through one end of the tank body 1 through a bearing. Multiple spherical nozzles 14 are uniformly arranged on the rotating pipe 10. The spherical nozzles 14 are respectively arranged above the middle part of each partition compartment. The spherical nozzles 14 are provided with multi-angle nozzles. One end of the rotating pipe 10 outside the tank body 1 is provided with a medium inlet 13. A high-temperature steam generator connected with the medium inlet 13 is arranged outside the tank body 1. The driving device comprises a motor 11. The power output end of the motor 11 is connected with one end of the rotating pipe 10 outside the tank body 1 through a transmission belt 12.

[0032] Under the operation of the motor 11, the rotating rod can be driven to rotate quickly in the tank body 1 through the transmission belt 12. Since one end of the rotating rod outside the tank body 1 is connected with the high-temperature steam generator, the high-temperature steam generated by the high-temperature steam generator can be sprayed to the inner wall of the tank body 1 through the rotating rod. Since the rotating rod is provided with multiple spherical nozzles 14 arranged above the middle part of the multiple partition compartments, the multi-angle nozzles on the spherical nozzles 14 can ensure that the high-temperature steam completely sprays the inside of the tank body 1, completely removes the crystals in the tank body 1, ensures the service life of the device, and avoids the corrosion of the device by the crystals.

[0033] Example two

[0034] On the basis of example one, one end of the rotating pipe 10 outside the tank body 1 is provided with a medium inlet 13. An acetic acid solution storage device connected with the medium inlet 13 is arranged outside the tank body 1.

[0035] The acetic acid solution storage device is filled with 50%-80% mass percentage concentration acetic acid aqueous solution, and through a temperature control heater, the acetic acid solution is always kept at 30-35 DEG C, the acetic acid solution is pumped into the rotating tube 10 through the pump body, under the driving of the motor 11, the rotating tube 10 rotates in the tank body 1, the acetic acid solution in the rotating tube 10 can continuously spray to the inner wall of the tank body 1 and the equipment in the tank body 1 through the multi-angle spray holes of the spherical spray head 14, after continuous soaking, the crystals in the tank body 1 are completely dissolved, when the crystals are completely dissolved, the clean water is not pumped into the rotating tube 10, and the tank body 1 is completely cleaned through the clean water.

[0036] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or additions or substitutions within the technical scope disclosed by the present application, and all of these should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A partitioned temperature-controlled urea hydrolysis reactor comprising a tank body (1), characterized in that, The tank body (1) is internally provided with a plurality of partitions (2) which separate the tank body (1) into separate compartments along the length direction of the tank body (1), the tank body (1) is provided with a heat exchanger at the bottom thereof which penetrates the plurality of partitions (2), the tank body (1) is internally provided with a rotating spraying device along the length direction thereof, one end of the rotating spraying device is provided at one end of the tank body (1), and the tank body (1) is provided at the top thereof with a driving device capable of driving the rotating spraying device.

2. A zonally controlled urea hydrolysis reactor according to claim 1, characterized in that The heat exchanger comprises heat exchange pipes (8) which are provided at the bottom of the tank body (1), one end of the heat exchange pipes (8) is provided at one end of the tank body (1), and the tank body (1) is externally provided with end heads (9) connected with the heat exchange pipes (8).

3. The zonally controlled urea hydrolysis reactor of claim 1, wherein, The rotating spraying device comprises a rotating pipe (10) which is provided at one end of the tank body (1) through a bearing, a plurality of spherical nozzles (14) are uniformly provided on the rotating pipe (10), the spherical nozzles (14) are respectively located at the middle portion above each separate compartment, and the spherical nozzles (14) are provided with multi-angle spray holes.

4. The zonally controlled urea hydrolysis reactor of claim 3, wherein, One end of the rotating pipe (10) located outside the tank body (1) is provided with a medium inlet (13), and the tank body (1) is externally provided with a high-temperature steam generator capable of being connected with the medium inlet (13).

5. The zonally controlled urea hydrolysis reactor of claim 3, wherein, One end of the rotating pipe (10) located outside the tank body (1) is provided with a medium inlet (13), and the tank body (1) is externally provided with an acetic acid solution storage device capable of being connected with the medium inlet (13).

6. A zonally controlled urea hydrolysis reactor according to claim 3, characterized in that The driving device comprises a motor (11), and a power output end of the motor (11) is connected with one end of the rotating pipe (10) located outside the tank body (1) through a transmission belt (12).

7. The zonally controlled urea hydrolysis reactor of claim 1, wherein, The tank body (1) is provided at the top thereof with a plurality of temperature and pressure combination indicator connection ports (4) and product gas output ports (7), the tank body (1) is provided at the bottom thereof with a plurality of blowdown ports (6) respectively communicated with the separate compartments, the tank body (1) is provided on the side wall thereof with a plurality of liquid inlet ports (5) respectively communicated with the separate compartments, the partitions (2) are located below the rotating spraying device, the rotating spraying device is located at the middle upper portion of the tank body (1), the partitions (2) are provided at the top thereof with supporting seats (15), and the supporting seats (15) are provided with supporting wheels (16) capable of supporting the rotating spraying device.

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