Steam recycling device for urea production

Abstract

The utility model is applicable to the technical field of urea production, and provides a steam recycling device for urea production, which comprises a recycling barrel, a gas treatment component is arranged at the upper end of the recycling barrel, and a corrosion-resistant material layer is arranged on the inner wall of the recycling barrel; a gas-liquid separation assembly is arranged in the recycling barrel; the gas treatment assembly comprises gas outlet pipes communicating with the top of the recycling barrel, the upper ends of the two gas outlet pipes are detachably and fixedly connected with communicating pipes through flange plates, the communicating pipe on one side communicates with a soft water heater, and the communicating pipe on the other side communicates with a deaerator. According to the device, steam condensate can be recycled conveniently, the temperature of water entering the boiler can be increased by arranging the air outlet pipe and the communicating pipe, and the communicating pipe is connected with the soft water heater and the deaerator, and meanwhile the flow of the condensate can be monitored conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of urea production, and in particular relates to a steam recovery and utilization device for urea production. Background Art

[0002] Urea, also known as carbamide, is an organic compound composed of carbon, nitrogen, oxygen, and hydrogen. It is a white crystalline solid. One of the simplest organic compounds, it is the primary nitrogenous end product of protein metabolism in mammals and some fish. It is also the nitrogen fertilizer with the highest nitrogen content. As a neutral fertilizer, urea is suitable for a variety of soils and plants. It is easy to store, convenient to use, and minimally destructive to soil, making it a widely used chemical nitrogen fertilizer. Urea is synthesized industrially from ammonia and carbon dioxide under certain conditions. With the continuous expansion of urea production capacity, market saturation, and environmental pressures, costs are rising, placing higher demands on various consumption indicators. Optimizing process operations and reducing costs are becoming increasingly urgent. Utilizing this steam energy and reducing steam consumption are imperative.

[0003] The prior art also has the following deficiencies:

[0004] In the prior art, all steam condensate generated in the process of the main urea device is collected into a steam condensate tank. Part of the steam will pass through the steam trap and the steam condensate cooler and return to the liquid level tank. The liquid level tank generates vent steam under normal pressure, resulting in energy waste and not conducive to energy saving and consumption reduction. Utility Model Content

[0005] The utility model provides a steam recovery and utilization device for urea production, aiming to solve the problem in the prior art that steam condensate generated in the process of the main urea device is completely collected to form a steam condensate tank, part of the steam passes through a steam condensate cooler through a steam trap and returns to a liquid level tank, and vent steam is generated in the liquid level tank under normal pressure, resulting in energy waste and being detrimental to energy saving and consumption reduction.

[0006] The utility model is implemented as follows: a steam recovery and utilization device for urea production includes: a recovery cylinder, a gas treatment component is provided at the upper end of the recovery cylinder, and the inner wall of the recovery cylinder is provided with a corrosion-resistant material layer; a gas-liquid separation component is provided inside the recovery cylinder; the gas treatment component includes an outlet pipe connected to the top of the recovery cylinder, and the upper ends of the two outlet pipes are detachably fixedly connected to a connecting pipe through a flange, one side of the connecting pipe is connected to a soft water heater, and the other side of the connecting pipe is connected to a deaerator.

[0007] Preferably, a liquid outlet pipe is connected to the middle of the bottom of the recovery cylinder; an extended end of the liquid outlet pipe is connected to a condensate collecting cylinder; and a liquid level sensor is installed inside the condensate collecting cylinder.

[0008] Preferably, a control valve and a self-regulating valve are installed on the liquid outlet pipe.

[0009] Preferably, the bottom of the recovery cylinder is inclined toward the liquid outlet pipe.

[0010] Preferably, the gas-liquid separation component includes a stepper motor installed on the upper and lower sides of the outside of the recovery cylinder, the output ends of the two stepper motors penetrate into the recovery cylinder and are fixedly connected to condensate separation frames, and the extended ends of the two condensate separation frames are rotatably connected to the inner wall of the other side of the recovery cylinder.

[0011] Preferably, an air inlet pipe is connected to the middle of the top of the recovery cylinder, and a pressure control and adjustment device is also installed on one side of the top of the recovery cylinder.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0013] This device is convenient for recovering steam condensate. By setting up an outlet pipe and a connecting pipe, which are connected to the soft water heater and the deaerator, the temperature entering the boiler can be increased and the condensate flow rate can be monitored. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the top view of the condensate separation frame of the utility model;

[0016] Figure 3 This utility model Figure 1 A in the middle is an enlarged structural diagram;

[0017] In the figure: 1. Recovery cylinder; 2. Gas-liquid separation component; 3. Gas treatment component; 4. Inlet pipe; 5. Pressure control and adjustment device; 6. Outlet pipe; 7. Connecting pipe; 8. Soft water heater; 9. Deaerator; 10. Stepper motor; 11. Condensate separation frame; 12. Outlet pipe; 13. Self-regulating valve; 14. Control valve; 15. Condensate collection cylinder; 16. Liquid level sensor. DETAILED DESCRIPTION

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0019] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] The present invention provides a steam recovery and utilization device for urea production, such as Figure 1-3 As shown, it includes: a recovery cylinder 1, a gas processing component 3 is provided at the upper end of the recovery cylinder 1, and the inner wall of the recovery cylinder 1 is provided with a corrosion-resistant material layer; a gas-liquid separation component 2 is provided inside the recovery cylinder 1; the gas processing component 3 includes an outlet pipe 6 connected to the top of the recovery cylinder 1, and the upper ends of the two outlet pipes 6 are detachably fixedly connected to a connecting pipe 7 through a flange, one side of the connecting pipe 7 is connected to a soft water heater 8, and the other side of the connecting pipe 7 is connected to a deaerator 9.

[0021] It should be noted that, since the steam condensate generated in the process of the urea main device in the prior art is all collected to form a steam condensate tank, part of the steam will pass through the steam trap and the steam condensate cooler and return to the liquid level tank. The liquid level tank produces vent steam under normal pressure, which causes energy waste and is not conducive to energy saving and consumption reduction. This scheme and this device facilitate the recovery of steam condensate. By providing an outlet pipe 6 and a connecting pipe 7, the connecting pipe 7 is connected to the soft water heater 8 and the deaerator 9, which can increase the temperature entering the boiler.

[0022] In a further preferred embodiment of the present invention, Figure 1 As shown, the bottom middle of the recovery tube 1 is connected with a liquid outlet pipe 12; the extended end of the liquid outlet pipe 12 is connected with a condensate collecting tube 15; the interior of the condensate collecting tube 15 is installed with a liquid level sensor 16, model: HFKE float switch water level controller.

[0023] In this embodiment, it is convenient to detect the condensation liquid level.

[0024] It should be noted that the model specification of the liquid level sensor 16 HFKE float switch water level controller type is not the only limitation, but is selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0025] The power supply and principle of the liquid level sensor 16 are clear to those skilled in the art and will not be described in detail here.

[0026] In a further preferred embodiment of the present invention, Figure 1 As shown, a control valve 14 and a self-regulating valve 13 are installed on the liquid outlet pipe 12 .

[0027] In this embodiment, it is convenient to detect the condensate flow rate and upload the detection result to the external controller.

[0028] In a further preferred embodiment of the present invention, Figure 1 As shown, the bottom of the recovery cylinder 1 is inclined toward the liquid outlet pipe 12 on all sides.

[0029] In this embodiment, collection is facilitated.

[0030] In a further preferred embodiment of the present invention, Figure 1 As shown, the gas-liquid separation component 2 includes a stepper motor 10 installed on the upper and lower sides of the outside of the recovery tube 1. The output ends of the two stepper motors 10 penetrate into the recovery tube 1 and are fixedly connected to condensate separation frames 11 respectively. The extended ends of the two condensate separation frames 11 are both rotatably connected to the inner wall of the other side of the recovery tube 1.

[0031] In this embodiment, gas-liquid separation is facilitated by providing two condensate separation racks 11 to increase the contact area, and by installing a stepping motor 10 to accelerate the dripping of the condensate.

[0032] In a further preferred embodiment of the present invention, Figure 1-3 As shown, an air inlet pipe 4 is connected to the middle of the top of the recovery tube 1 , and a pressure control and adjustment device 5 is also installed on one side of the top of the recovery tube 1 .

[0033] In this embodiment, pressure control is facilitated.

[0034] The electrical components appearing in the text are all electrically connected to the controller and the power supply. The control method of the present invention is controlled by the controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. In addition, the present invention is mainly used to protect mechanical devices, so the control method and circuit connection are no longer explained in detail in the present invention.

[0035] It should be noted that for the aforementioned embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0036] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the division of the above-mentioned units. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or communication connection between each other shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0037] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope to be protected by the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making any creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope to be protected by the present invention.

Claims

1. A steam recovery and utilization device for urea production, characterized in that: include: A recovery cylinder (1), wherein a gas processing assembly (3) is provided at the upper end of the recovery cylinder (1), and an inner wall of the recovery cylinder (1) is provided with a corrosion-resistant material layer; A gas-liquid separation component (2) is provided inside the recovery cylinder (1); The gas treatment assembly (3) includes an outlet pipe (6) connected to the top of the recovery cylinder (1), and the upper ends of the two outlet pipes (6) are detachably fixedly connected to a connecting pipe (7) through a flange, wherein the connecting pipe (7) on one side is connected to a soft water heater (8), and the connecting pipe (7) on the other side is connected to a deaerator (9).

2. A urea production steam recovery and utilization device according to claim 1, characterized in that: A liquid outlet pipe (12) is connected to the middle of the bottom of the recovery cylinder (1); The extended end of the liquid outlet pipe (12) is connected to a condensate collecting cylinder (15); A liquid level sensor (16) is installed inside the condensate collecting cylinder (15).

3. A urea production steam recovery and utilization device according to claim 2, characterized in that: The liquid outlet pipe (12) is provided with a control valve (14) and a self-regulating valve (13).

4. A urea production steam recovery and utilization device according to claim 2, characterized in that: The bottom of the recovery cylinder (1) is inclined towards the liquid outlet pipe (12) on all sides.

5. The urea production steam recovery and utilization device according to claim 1, characterized in that: The gas-liquid separation component (2) includes stepper motors (10) installed on the upper and lower sides of the outside of the recovery cylinder (1), the output ends of the two stepper motors (10) penetrate into the recovery cylinder (1) and are respectively fixedly connected to condensate separation frames (11), and the extended ends of the two condensate separation frames (11) are both rotatably connected to the inner wall of the other side of the recovery cylinder (1).

6. The urea production steam recovery and utilization device according to claim 1, characterized in that: An air inlet pipe (4) is connected to the middle of the top of the recovery cylinder (1), and a pressure control and adjustment device (5) is also installed on one side of the top of the recovery cylinder (1).

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