Urea hydrolyzer with gas phase and liquid phase chloride ion detection function

Abstract

The utility model discloses a urea hydrolyzer with a gas phase and liquid phase chloride ion detection function, which belongs to the technical field of urea hydrolysis ammonia production equipment, and comprises a urea hydrolyzer body provided with a product gas pipeline branch pipe and a sampling pipe; the gas-phase chloride ion detection module is communicated with the product gas pipeline branch pipe; and the liquid-phase chloride ion detection module is communicated with the sampling pipe. According to the utility model, the gas-phase chloride ion detection module and the liquid-phase chloride ion detection module are arranged, and chloride ion concentration detection is carried out on the product gas generated in the urea hydrolyzer and the reacted solution at the same time, so that the technical problems of risk and sampling difficulty caused by manual sampling in chloride ion detection are solved; the technical effect of improving the accuracy of detection results of the gas-phase chloride ions and the liquid-phase chloride ions is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of urea hydrolysis ammonia production equipment, in particular to a urea hydrolyzer with gas phase and liquid phase chloride ion detection functions. Background Art

[0002] During the operation of the urea hydrolysis system, in order to detect the content of chloride ions in the liquid and gas phases of the hydrolyzer, it is necessary to sample and test the liquid and gas phases. Since the inside of the hydrolyzer is in a high temperature and high pressure state, its operating temperature is usually 160°C and the pressure is 0.6MPa. If sampling and testing are performed directly from the sampling port at the bottom of the hydrolyzer, the water in the sample will evaporate immediately due to the flash evaporation effect, causing the sample to concentrate, which in turn affects the test results; in the gas phase sampling process, the product gas is composed of carbon dioxide, water vapor, and ammonia. The gas flow velocity is high, the temperature is high, and the pressure is high, making it difficult to collect. At the same time, the ammonia leakage caused during the sampling process poses certain health and safety risks to on-site workers. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a urea hydrolyzer with gas phase and liquid phase chloride ion detection functions, comprising:

[0004] A urea hydrolyzer body, wherein a product gas pipeline branch is provided on the urea hydrolyzer body, wherein the product gas pipeline branch is communicated with the urea hydrolyzer body, and a sampling tube is also provided on the urea hydrolyzer body, wherein one end of the sampling tube is communicated with the urea hydrolyzer body;

[0005] A gas-phase chloride ion detection module, the gas-phase chloride ion detection module is connected to one end of the product gas pipeline branch away from the urea hydrolyzer body, and the gas-phase chloride ion detection module is used to perform chloride ion detection on the product gas generated in the urea hydrolyzer body;

[0006] A liquid-phase chloride ion detection module, the liquid-phase chloride ion detection module being connected to an end of the sampling tube away from the urea hydrolyzer body, the liquid-phase chloride ion detection module being used to perform chloride ion detection on a solution generated after a reaction in the urea hydrolyzer body;

[0007] Wherein, an air intake control valve is provided on the product gas pipeline branch between the urea hydrolyzer body and the gas-phase chloride ion detection module, and a liquid intake control valve is provided on the sampling tube between the urea hydrolyzer body and the liquid-phase chloride ion detection module;

[0008] The gas phase chloride ion detection module and the liquid phase chloride ion detection module operate simultaneously.

[0009] Preferably, the gas phase chloride ion detection module comprises:

[0010] A temperature and pressure reducing device, which is arranged on the branch pipe of the product gas pipeline and connected to the urea hydrolyzer body through the branch pipe of the product gas pipeline;

[0011] A first absorber, which is arranged on the branch pipe of the product gas pipeline and connected to the temperature and pressure reducing device through the branch pipe of the product gas pipeline;

[0012] A gas phase chloride ion detector, which is disposed at the end of the product gas pipeline branch and is connected to the first absorber through the product gas pipeline branch;

[0013] The temperature and pressure reducer, the first absorber and the gas-phase chloride ion detector are sequentially arranged on the product gas pipeline branch pipe from the direction close to the urea hydrolyzer body and connected thereto.

[0014] Preferably, the liquid phase chloride ion detection module comprises:

[0015] a second absorber, the second absorber being disposed on the sampling tube and connected to the urea hydrolyzer body through the sampling tube;

[0016] A liquid-phase chlorine ion detector is arranged at the end of the sampling tube and is connected to the second absorber through the sampling tube.

[0017] Preferably, the first absorber further comprises:

[0018] a first injection valve, the first injection valve being used to control the external absorption liquid to enter the first absorber;

[0019] a first vent valve, the first vent valve being used to control the discharge of liquid in the first absorber;

[0020] A first thermometer is used to detect the temperature of the liquid in the first absorber.

[0021] Preferably, a pressure gauge is also provided on the product gas pipeline branch, and the pressure gauge is located between the temperature and pressure reducing device and the first absorber.

[0022] Preferably, the second absorber comprises:

[0023] a second injection valve, the second injection valve being used to control the external absorption liquid to enter the second absorber;

[0024] a second vent valve, the second vent valve being used to control the discharge of liquid in the second absorber;

[0025] A second thermometer is used to detect the temperature of the liquid in the second absorber.

[0026] Preferably, the gas-phase chloride ion detection module further comprises a steam pipe, one end of which is connected to the product gas pipeline branch pipe, and a steam inlet valve is provided on the steam pipe.

[0027] Preferably, the sampling tube is connected to a deionized water tube, and a valve is provided at the connection between the deionized water tube and the sampling tube.

[0028] By adopting the above technical solution, the utility model mainly has the following technical effects:

[0029] By setting up a gas-phase chloride ion detection module and a liquid-phase chloride ion detection module, the chloride ion concentration of the product gas produced in the urea hydrolyzer and the solution after the reaction is detected at the same time, which solves the technical problems of risks and sampling difficulties caused by manual sampling in the detection of chloride ions, and achieves the technical effect of improving the accuracy of gas-phase chloride ion and liquid-phase chloride ion detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of a urea hydrolyzer with gas-phase and liquid-phase chloride ion detection functions according to the utility model;

[0031] Figure 2 This is a schematic diagram of the structure of a gas phase chloride ion detection module of a urea hydrolyzer having gas phase and liquid phase chloride ion detection functions according to the utility model;

[0032] Figure 3 The utility model is a structural schematic diagram of a liquid-phase chloride ion detection module of a urea hydrolyzer with gas-phase and liquid-phase chloride ion detection functions.

[0033] The meanings of the reference numerals are as follows:

[0034] 1. Urea hydrolyzer body; 11. Product gas pipeline branch; 111. Pressure gauge; 12. Sampling tube; 13. Air intake control valve; 14. Liquid intake control valve;

[0035] 2. Gas-phase chloride ion detection module; 21. Temperature and pressure reducing device; 22. First absorber; 221. First liquid injection valve; 222. First vent valve; 223. First thermometer; 23. Gas-phase chloride ion detector; 24. Steam pipe; 241. Steam inlet valve;

[0036] 3. Liquid-phase chloride ion detection module; 31. Second absorber; 311. Second liquid injection valve; 312. Second vent valve; 313. Second thermometer; 32. Liquid-phase chloride ion detector; 33. Deionized water pipe; 331. Valve. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the specification of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] Example:

[0040] See also Figure 1-Figure 3 As shown, the utility model provides a urea hydrolyzer with gas-phase and liquid-phase chloride ion detection functions. In practical application, it is used for sampling and detecting chloride ions in a urea hydrolysis system. It includes a urea hydrolyzer body 1, a gas-phase chloride ion detection module 2 and a liquid-phase chloride ion detection module 3.

[0041] The urea hydrolyzer body 1 is provided with a product gas pipeline branch 11, one end of which is in communication with the urea hydrolyzer body 1. The urea hydrolyzer body 1 is also provided with a sampling tube 12, one end of which is in communication with the urea hydrolyzer body 1. The gas-phase chloride ion detection module 2 is in communication with one end of the product gas pipeline branch 11 away from the urea hydrolyzer body 1, and the gas-phase chloride ion detection module 2 is used to detect chloride ions on the product gas generated after the reaction in the urea hydrolyzer body 1. The liquid-phase chloride ion detection module 3 is in communication with one end of the sampling tube 12 away from the urea hydrolyzer body 1, and the liquid-phase chloride ion detection module 3 is in communication with one end of the sampling tube 12 away from the urea hydrolyzer body 1, and the liquid-phase chloride ion detection module 3 is used to detect chloride ions on the solution generated after the reaction in the urea hydrolyzer body 1. The product gas pipeline branch 11 is arranged at the top of the urea hydrolyzer body 1, so that the product gas generated in the urea hydrolyzer can naturally enter the product gas pipeline branch 11, and the sampling tube 12 is arranged at the bottom of the urea hydrolyzer body 1, so that the liquid generated after the reaction in the urea hydrolyzer can smoothly flow into the sampling tube 12. Among them, an air intake control valve 13 is arranged on the product gas pipeline branch 11 between the urea hydrolyzer body 1 and the gas phase chloride ion detection module 2, and the air intake control valve 13 is used to control the communication state between the urea hydrolyzer body 1 and the gas phase chloride ion detection module 2, and a liquid intake control valve 14 is arranged on the sampling tube 12 between the urea hydrolyzer body 1 and the liquid phase chloride ion detection module 3, and the liquid intake control valve 14 is used to control the communication state between the urea hydrolyzer body 1 and the liquid phase chloride ion detection module 3. In this embodiment, when it is necessary to detect the chloride ion content in the liquid phase in the urea hydrolyzer body 1 and the product gas during the operation of the urea hydrolysis system, the air intake control valve 13 and the liquid intake control valve 14 are opened simultaneously, so that the urea hydrolyzer body 1 is connected with the gas phase chloride ion detection module 2 and the liquid phase chloride ion detection module 3 respectively. At this time, the product gas in the urea hydrolyzer body 1 enters the gas phase chloride ion detection module 2 for detection, and the solution in the urea hydrolyzer body 1 flows into the liquid phase chloride ion detection module 3 for detection, and the gas phase chloride ion detection module 2 and the liquid phase chloride ion detection module 3 operate simultaneously to realize the simultaneous detection of the gas phase chloride ions and the liquid phase chloride ions, thereby improving the efficiency of the detection of the chloride ion concentration generated in the urea hydrolysis.

[0042] In this embodiment, the gas phase chlorine ion detection module 2 includes a temperature reducing and pressure reducing device 21, a first absorber 22 and a gas phase chlorine ion detector 23. The temperature reducing and pressure reducing device 21 is arranged on the product gas pipeline branch 11, and is connected to the urea hydrolyzer body 1 through the product gas pipeline branch 11. The temperature reducing and pressure reducing device 21 is used to reduce the temperature of the product gas discharged from the urea hydrolyzer body 1 and slow down the pressure of the product gas entering the product gas pipeline branch 11. For example, the temperature reducing and pressure reducing device is a device that can reduce high-parameter steam (such as high-temperature and high-pressure steam) to low-parameter steam (such as low-pressure and low-temperature steam). It is a prior art and will not be described in detail here. The first absorber 22 is arranged on the product gas pipeline branch 11, and is connected to the temperature reducing and pressure reducing device 21 through the product gas pipeline branch 11. Adding absorption liquid in the first absorber 22 can condense and absorb other impurity gases in the product gas, thereby improving the accuracy of the detection result. The gas phase chlorine ion detector 23 is arranged at the end of the product gas pipeline branch 11 and is connected to the first absorber 22 through the product gas pipeline branch 11. The gas phase chlorine ion detector 23 is used to detect the gas phase chlorine ion content. The temperature and pressure reducer 21, the first absorber 22 and the gas phase chlorine ion detector 23 are sequentially arranged on the product gas pipeline branch 11 from the direction close to the urea hydrolyzer body 1 and connected thereto. A first detector valve is also provided between the gas-phase chloride ion detector 23 and the first absorber 22. Specifically, a first injection valve 221 and a first vent valve 222 are provided on the first absorber 22. The first injection valve 221 is used to control the external absorption liquid to enter the absorber, and the first vent valve 222 is used to control the discharge of liquid in the first absorber 22. That is, when gas-phase chloride ion detection is required, the first vent valve 222 is closed, and the first injection valve 221 is opened to inject absorption liquid into the first absorber 22. After the liquid level in the first absorber 22 reaches the set liquid level, the first injection valve 221 is closed. At this time, the air intake control valve 13 is opened, and the product gas in the urea hydrolyzer body 1 is reduced to the detection temperature through the temperature reducing and pressure reducing device 21. After entering the first absorber 22, the air intake control valve 13 is closed again, and the product gas in the first absorber 22 enters the gas-phase chloride ion detector 23 through the first detector valve. After the air intake is completed, the first detector valve is closed to start the detection of gas-phase chloride ions.

[0043] Preferably, in order to facilitate the cleaning of the gas-phase chloride ion detection module 2, the gas-phase chloride ion detection module 2 also includes a steam pipe 24, one end of the steam pipe 24 is connected to the product gas pipeline branch pipe 11, and the other end of the steam pipe 24 is connected to the external steam system. The steam pipe 24 is provided with a steam inlet valve 241 to control the entry of external steam. For example, before the gas-phase chloride ion detector 23 detects, the steam inlet valve 241 is opened to allow steam to enter the temperature-reducing and pressure-reducing device 21 for cooling, and then the pipeline is fully cleaned. The waste liquid generated is discharged through the first vent valve 222. After the gas-phase chlorine ion detector 23 completes the detection, open the first vent valve 222 to drain the absorption liquid in the first absorber 22, open the steam inlet valve again to clean the pipeline, and drain the first absorber 22 after flushing, and close the first vent valve 222 and the steam inlet valve 241. At this time, open the first injection valve 221 again, fill the first absorber 22 with absorption liquid, and then open the first vent valve 222 again to drain. Repeat this step several times to complete the cleaning of the first absorber 22 and the product gas pipeline branch 11, and prepare for the next gas-phase chlorine ion detection.

[0044] In this embodiment, the liquid-phase chlorine ion detection module 3 includes a second absorber 31 and a liquid-phase chlorine ion detector 32. The second absorber 31 is connected to the sampling tube 12 and is connected to the urea hydrolyzer body 1 through the sampling tube 12. The second absorber 31 is used to condense and absorb other impurities in the solution produced after the reaction to improve the detection accuracy. The liquid-phase chlorine ion detector 32 is arranged at the end of the sampling tube 12 and is connected to the second absorber 31 through the sampling tube 12. The second absorber 31 and the liquid-phase chlorine ion detector 32 are sequentially arranged on the sampling tube 12 and are connected to the sampling tube 12. A second detector valve is arranged between the second absorber 31 and the liquid-phase chlorine ion detector 32, wherein the second absorber 31 includes a second injection valve 311 and a second vent valve 312, the second injection valve 311 is used to control the external absorption liquid to enter the second absorber 31, and the second vent valve 312 is used to control the liquid discharge in the second absorber 31. That is, when liquid-phase chloride ion detection is required, the second injection valve 311 is opened, and the absorption liquid is injected into the second absorber 31 to the set liquid level, and then the second injection valve 311 is closed. At this time, the liquid inlet control valve 14 is opened to allow the solution in the urea hydrolyzer body 1 to flow into the second absorber 31 through the sampling tube 12. After the temperature reaches the detection temperature, the liquid inlet control valve 14 is closed, and then the second detector valve is opened to allow the solution to enter the liquid-phase chloride ion detector 32, and then the second detector valve is closed to detect the liquid-phase chloride ions.

[0045] Preferably, in order to facilitate the cleaning of the liquid-phase chloride ion detection module 3, the sampling tube 12 is connected to a deionized water tube 33, and a valve 331 is provided at the connection between the deionized water tube 33 and the sampling tube 12. For example, before the liquid-phase chloride ion detection, the valve 331 is opened to allow the deionized water in the deionized water tube 33 to fill the second absorber 31 with the deionized water, and then the second drain valve 312 is opened to discharge it. After repeating this step for multiple times, the valve 331 is closed to clean the inside of the second absorber 31. After the liquid-phase chloride ion detection is completed, this step is continued to be repeated to clean the sampling tube 12 and the second absorber 31.

[0046] In some embodiments, the first absorber 22 is further provided with a first thermometer 223. When the product gas enters the first absorber 22, the thermometer detects the temperature of the absorption liquid in the first absorber 22 to ensure that when the gas phase chloride ion detector 23 is operating, the liquid temperature is at a detectable threshold temperature to prevent the absorption liquid from overheating during the absorption process. Preferably, the product gas pipeline branch 11 is further provided with a pressure gauge 111. The pressure gauge 111 is located between the temperature and pressure reducer 21 and the first absorber 22. The pressure gauge 111 detects the gas pressure entering the product gas pipeline branch 11 to ensure that the pressure of the product gas is within the detectable threshold pressure.

[0047] In some embodiments, a second thermometer 313 is further provided on the second absorber 31. The second thermometer 313 has the same function as the first thermometer 223. When the solution enters the second absorber 31, the second thermometer 313 detects the temperature of the solution after the reaction in the second absorber 31 to ensure that when the liquid phase chloride ion detector 32 is operating, the temperature of the solution after the reaction is within the detectable threshold temperature.

[0048] Finally, it should be noted that the embodiments of the present invention disclose only preferred embodiments of the present invention, which are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A urea hydrolyzer with gas phase and liquid phase chloride ion detection function, characterized in that: include: A urea hydrolyzer body (1), wherein a product gas pipeline branch pipe (11) is provided on the urea hydrolyzer body (1), and the product gas pipeline branch pipe (11) is connected to the urea hydrolyzer body (1); and a sampling pipe (12) is also provided on the urea hydrolyzer body (1), and one end of the sampling pipe (12) is connected to the urea hydrolyzer body (1); a gas-phase chloride ion detection module (2), the gas-phase chloride ion detection module (2) being in communication with an end of the product gas pipeline branch (11) away from the urea hydrolyzer body (1), the gas-phase chloride ion detection module (2) being used to perform chloride ion detection on the product gas generated in the urea hydrolyzer body (1); a liquid-phase chloride ion detection module (3), the liquid-phase chloride ion detection module (3) being in communication with an end of the sampling tube (12) away from the urea hydrolyzer body (1), the liquid-phase chloride ion detection module (3) being used to perform chloride ion detection on a solution generated after a reaction in the urea hydrolyzer body (1); Wherein, an air intake control valve (13) is provided on the product gas pipeline branch pipe (11) between the urea hydrolyzer body (1) and the gas-phase chloride ion detection module (2), and a liquid intake control valve (14) is provided on the sampling pipe (12) between the urea hydrolyzer body (1) and the liquid-phase chloride ion detection module (3); The gas phase chlorine ion detection module (2) and the liquid phase chlorine ion detection module (3) operate simultaneously.

2. The urea hydrolyzer with gas-phase and liquid-phase chloride ion detection function according to claim 1, characterized in that: The gas phase chloride ion detection module (2) comprises: a temperature reducing and pressure reducing device (21), wherein the temperature reducing and pressure reducing device (21) is arranged on the product gas pipeline branch pipe (11) and is connected to the urea hydrolyzer body (1) via the product gas pipeline branch pipe (11); a first absorber (22), the first absorber (22) being arranged on the product gas pipeline branch pipe (11) and connected to the temperature and pressure reducing device (21) via the product gas pipeline branch pipe (11); a gas-phase chlorine ion detector (23), the gas-phase chlorine ion detector (23) being arranged at the end of the product gas pipeline branch pipe (11) and connected to the first absorber (22) via the product gas pipeline branch pipe (11); The temperature and pressure reducer (21), the first absorber (22) and the gas phase chloride ion detector (23) are sequentially arranged on the product gas pipeline branch (11) from the direction close to the urea hydrolyzer body (1) and connected thereto.

3. The urea hydrolyzer with gas-phase and liquid-phase chloride ion detection function according to claim 1, characterized in that: The liquid-phase chloride ion detection module (3) comprises: a second absorber (31), the second absorber (31) being arranged on the sampling tube (12) and connected to the urea hydrolyzer body (1) via the sampling tube (12); A liquid-phase chlorine ion detector (32), wherein the liquid-phase chlorine ion detector (32) is arranged at the end of the sampling tube (12) and is connected to the second absorber (31) via the sampling tube (12).

4. The urea hydrolyzer with gas-phase and liquid-phase chloride ion detection function according to claim 2, characterized in that: The first absorber (22) further comprises: a first liquid injection valve (221), the first liquid injection valve (221) being used to control external absorption liquid to enter the first absorber (22); a first vent valve (222), the first vent valve (222) being used to control the discharge of liquid in the first absorber (22); A first thermometer (223), wherein the first thermometer (223) is used to detect the temperature of the liquid in the first absorber.

5. The urea hydrolyzer with gas-phase and liquid-phase chloride ion detection function according to claim 2, characterized in that: A pressure gauge (111) is also provided on the product gas pipeline branch pipe (11), and the pressure gauge (111) is located between the temperature and pressure reducing device (21) and the first absorber (22).

6. The urea hydrolyzer with gas-phase and liquid-phase chloride ion detection function according to claim 3, characterized in that: The second absorber (31) comprises: a second liquid injection valve (311), the second liquid injection valve (311) being used to control external absorption liquid to enter the second absorber (31); a second vent valve (312), the second vent valve (312) being used to control the discharge of liquid in the second absorber (31); A second thermometer (313), wherein the second thermometer (313) detects the temperature of the liquid in the second absorber.

7. The urea hydrolyzer with gas-phase and liquid-phase chloride ion detection function according to claim 1, characterized in that: The gas-phase chloride ion detection module (2) further comprises a steam pipe (24), one end of the steam pipe (24) being connected to the product gas pipeline branch pipe (11), and a steam inlet valve (241) being provided on the steam pipe (24).

8. The urea hydrolyzer with gas-phase and liquid-phase chloride ion detection function according to claim 1, characterized in that: The sampling tube (12) is connected to a deionized water tube (33), and a valve (331) is provided at the connection between the deionized water tube (33) and the sampling tube (12).

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