Blind plate for replacing waste heat boiler of ammonia synthesis tower

Abstract

The blind plate for replacing the waste heat boiler of the ammonia synthesis tower comprises a blind plate body, a connecting hole is formed in the blind plate body, and the connecting hole is matched with a synthesis tower flange. Comprising a pressure detection device which is installed on a blind plate body, and when the blind plate body is inserted into a flange at the lower end of the ammonia synthesis tower, a pressure gauge detects the internal pressure of the ammonia synthesis tower. According to the blind plate, the pressure detection device and the three-way valve are arranged on the blind plate body, so that the internal pressure of the synthesis tower can be detected at the position of the blind plate; and the internal pressure of the synthesis tower can be adjusted by adjusting the three-way valve on the blind plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to synthetic ammonia tower maintenance technical field especially a blind plate for replacing waste heat boiler of ammonia synthesis tower. BACKGROUND

[0002] Ammonia synthesis converter is used for catalytic reaction of nitrogen and hydrogen to synthesize ammonia under high pressure and high temperature. The gas temperature at the outlet of the synthesis tower is very high, and needs to be cooled and heat recovered by a water cooler and a waste heat boiler. The water cooler indirectly cools the gas by water, and the waste heat boiler recovers heat to generate steam, so as to achieve the purpose of energy saving and temperature reduction. Since the waste heat boiler is in a high temperature and high pressure environment for a long time, it needs to be regularly inspected and replaced with unqualified waste heat boilers.

[0003] The nitrogen needs to be filled into the waste heat boiler in the ammonia synthesis tower after replacement, so that the system is always in a slightly positive pressure state. At the same time, the pressure in the synthesis tower needs to be continuously detected on site to prevent the outside air from entering the synthesis tower and reacting with the iron catalyst, thereby shortening the service life of the catalyst. Since the synthesis tower body is not provided with a pressure gauge, the pressure detection on other pipelines of the ammonia synthesis system cannot intuitively and accurately reflect the pressure condition in the synthesis tower, and the continuous and uninterrupted detection of the slightly positive pressure value in the synthesis tower becomes a difficulty. Therefore, how to intuitively and real-timely detect the slightly positive pressure value in the synthesis tower is one of the important problems to be solved at present. SUMMARY

[0004] In view of the above problems existing in the prior art, the purpose of the utility model is to provide a blind plate for replacing waste heat boiler of ammonia synthesis tower, which can intuitively, accurately and real-timely monitor the slightly positive pressure value in the ammonia synthesis tower.

[0005] To solve the above problems, the utility model adopts the following technical scheme: the utility model provides a blind plate for replacing waste heat boiler of ammonia synthesis tower, which comprises a blind plate body, a connecting hole is arranged on the blind plate body, and the connecting hole is matched with a flange of the synthesis tower.

[0006] The pressure detection device is installed on the blind plate body, and the pressure gauge detects the pressure in the ammonia synthesis tower when the blind plate body is inserted into the lower end flange of the ammonia synthesis tower.

[0007] In some embodiments, a three-way valve is installed on the blind plate body, and the three-way valve controls the inlet and outlet of nitrogen respectively.

[0008] In some embodiments, the pressure detection device is a pressure gauge or a pressure transmitter.

[0009] In some embodiments, the pressure transmitter is mounted on the blind plate body, the blind plate body is provided with a first mounting hole, the pressure transmitter is fixed in the preset first mounting hole, and the mounting is welded and fixed.

[0010] In some embodiments, the pressure transmitter is connected to the pressure source through the connection pressure port and the high-pressure hose or the adapter.

[0011] The electrical connection is completed by connecting the transmitter to the power supply and the output device through the wiring terminal.

[0012] In some embodiments, the blind plate body is made of high-strength lightweight material.

[0013] In some embodiments, the surface of the blind plate body is coated with a corrosion-resistant coating.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are that:

[0015] 1. The utility model discloses a pressure detection device and a three-way valve on the blind plate body, which can detect the pressure in the synthetic tower at the blind plate position.

[0016] 2. When the pressure detection device is a pressure sensor, the utility model can realize remote transmission of pressure data, so that the detection personnel can obtain pressure information in a high-temperature and high-pressure environment, and the safety of the working personnel is effectively improved.

[0017] 3. The utility model discloses a corrosion-resistant material layer on the blind plate body, which can effectively improve the high-temperature and high-pressure resistance of the blind plate body and prolong the service life.

[0018] 4. The utility model discloses a blind plate made of high-strength lightweight material, which can reduce the weight of the blind plate and reduce the installation difficulty and lifting demand. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a blind plate structure schematic view described in the application.

[0020] Fig. 2 It is a top view of the blind plate described in the application.

[0021] Wherein, 1, blind plate body, 2, pressure detection device, 3, three-way valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0024] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present application, it should be noted that the directions or position relationships indicated by the terms "inner", "outer", "upper", etc. are based on the directions or position relationships shown in the drawings, or the directions or position relationships commonly placed when the product of the present application is used, which are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular direction, be constructed and operated in a particular direction, therefore, cannot be understood as limiting the present application.

[0026] Embodiments

[0027] Please refer to Figs. 1-2 As shown in the drawings, the present application provides a blind plate for replacing a waste heat boiler of an ammonia synthesis tower, which comprises a blind plate body 1, a connecting hole is arranged on the blind plate body 1, the connecting hole is matched with a flange of the synthesis tower; a pressure detection device 2 is arranged on the blind plate body 1, when the blind plate body 1 is inserted into the lower end flange of the ammonia synthesis tower, the pressure detection device 2 detects the internal pressure of the ammonia synthesis tower, and the pressure detection device 2 is a pressure gauge or a pressure transmitter.

[0028] It should be noted that after the flange connecting the boiler and the synthesis ammonia synthesis tower body is disassembled, the blind plate needs to be inserted at the lower end flange of the synthesis tower, but the ordinary blind plate cannot observe the internal pressure of the synthesis tower, and cannot sample, introduce nitrogen and realize the micro-positive pressure function in the synthesis tower.

[0029] The blind plate provided by the application can realize general functions, i.e. medium separation and prevent external air from entering the synthesis tower, can detect the internal pressure of the synthesis tower at the position of the added blind plate, and can realize adjustment of the internal pressure of the synthesis tower by adjusting the valve on the blind plate.

[0030] The blind plate provided by the application is made of high-strength lightweight material, such as titanium alloy or composite material, so that the overall weight of the blind plate body 1 is lighter and easy to install.

[0031] The application also comprises a three-way valve 3 installed on the blind plate body 1, which controls the inlet and outlet of nitrogen respectively, and realizes adjustment of the internal pressure of the synthesis tower by adjusting the valve on the blind plate.

[0032] In some embodiments, for the convenience of detecting the internal pipeline pressure of the blind plate, the pressure gauge of the blind plate can be replaced by a pressure transmitter according to the requirements of on-site detection and remote detection. Specifically, the pressure transmitter is installed on the blind plate body 1, the blind plate body 1 is provided with a first mounting hole, the pressure transmitter is fixed in the preset first mounting hole, and the fixing is welded.

[0033] The connection pressure port of the pressure transmitter is connected to the pressure source by using a high-pressure hose or an adapter, and the electrical connection is completed by connecting the transmitter to the power supply and the output device through the wiring terminal. The use of the pressure transmitter can realize the remote transmission of pressure data, so that the detection personnel can also obtain pressure information in a high-temperature and high-pressure environment, effectively improving the safety of the workers.

[0034] In some embodiments, in order to further improve the corrosion resistance of the blind plate body 1 and prolong the service life, the surface of the blind plate body 1 is coated with a corrosion-resistant coating, and the corrosion-resistant coating is specifically a ceramic coating.

[0035] In use, after the blind plate is made according to the required size, two mounting holes are opened in the central position of the blind plate, one hole is used for installing a pressure gauge for detecting the internal pressure of the synthesis tower, and the other hole is welded with a three-way valve 3, and valves are installed on the two branches to control the inlet and outlet of nitrogen respectively, for example, to realize sampling of the gas at the position of the added blind plate of the synthesis tower, to realize the micro-positive pressure function of the synthesis tower by introducing nitrogen, etc.

[0036] Finally, it should be pointed out that the above description is only a preferred specific embodiment of the application, but the protection scope of the application is not limited thereto, and any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered within the protection scope of the application.

Claims

1. A blind for replacing a waste heat boiler in an ammonia synthesis tower, characterized in that It comprises a blind plate body (1) provided with connecting holes matched with the flange of the synthetic tower; It comprises a pressure detection device (2) installed on the blind plate body (1), and the blind plate body (1) is inserted into the lower end flange of the ammonia synthesis tower, and the pressure gauge detects the internal pressure of the ammonia synthesis tower.

2. A blind plate for replacing a waste heat boiler of an ammonia converter according to claim 1, characterized in that, It comprises a three-way valve (3) installed on the blind plate body (1), which controls the inlet and outlet of nitrogen respectively.

3. A blind plate for replacing a waste heat boiler of an ammonia converter according to claim 1, characterized in that, The pressure detection device (2) is a pressure gauge or a pressure transmitter.

4. A blind plate for replacing a waste heat boiler of an ammonia converter according to claim 3, characterized in that The pressure transmitter is installed on the blind plate body (1), and the blind plate body (1) is provided with a first mounting hole, the pressure transmitter is fixed in the preset first mounting hole, and the mounting is welded and fixed.

5. A blind plate for replacing a waste heat boiler in an ammonia converter according to claim 4, characterized in that The connecting pressure port of the pressure transmitter is connected to the pressure source by using a high-pressure hose or an adapter. The electrical connection is completed by connecting the transmitter to the power supply and the output device through the wiring terminal.

6. A blind plate for replacing a waste heat boiler of an ammonia converter according to claim 1, characterized in that, The blind plate body (1) is made of high-strength lightweight material.

7. A blind plate for replacing a waste heat boiler in an ammonia converter according to claim 1, characterized in that, The surface of the blind plate body (1) is coated with a corrosion-resistant coating.

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