Deaminating system

Abstract

The present application belongs to the technical field of coke oven gas deamination, and discloses a deamination system, which comprises a first saturator, a full-flow tank, a crystallization tank, a first crystallization pump, a centrifuge and a measuring assembly. A crystallization cycle is formed among the first saturator, the first crystallization pump, the crystallization tank and the centrifuge, and a mother liquor cycle is formed between the first saturator and the full-flow tank. The measuring assembly comprises a crystal ratio measuring buffer tank and an acidity measuring buffer tank arranged in series, the inlet of the crystal ratio measuring buffer tank is communicated with the outlet of the first crystallization pump, the outlet of the crystal ratio measuring buffer tank is communicated with the inlet of the first crystallization pump, and the outlet of the acidity measuring buffer tank is communicated with the full-flow tank. The deamination system can monitor the crystal ratio and the acidity in the mother liquor in real time through the measuring assembly, has high detection accuracy, is helpful to accurately control the amount of acid added, and ensures the particle consistency of the ammonium sulfate product produced.

Description

Technical Field

[0001] This invention relates to the field of ammonia removal technology for coke oven gas, and more particularly to an ammonia removal system. Background Technology

[0002] In the coking industry, a large amount of coke oven gas is generated during the coke production process. Coke oven gas contains a lot of substances such as tar, benzene, and ammonia. Therefore, coking enterprises use ammonium sulfate process to recover ammonia from the gas in their coking production units.

[0003] The purification process for coke oven gas generally includes condensation, ammonia removal, and benzene washing. During ammonia removal, ammonia is removed from the coke oven gas, yielding ammonium sulfate as a byproduct. Traditional ammonia removal equipment is typically a saturator, where both ammonia absorption and ammonium sulfate crystallization take place. To ensure the consistency of the produced ammonium sulfate particles, the supersaturation of the mother liquor in the saturator needs to be controlled. Workers usually take samples at the outlet of the crystallization pump. A portion of the mother liquor sample is placed in a graduated cylinder, and the ammonium sulfate crystal ratio in the mother liquor is determined using the density difference sedimentation method. The acidity of the other portion of the mother liquor sample is measured manually using titration.

[0004] However, measuring the crystal ratio and acidity of the mother liquor by manual sampling, settling, or titration has certain data deviations, low measurement accuracy, and relatively slow and untimely adjustments, which can easily lead to large differences in particle size of the produced ammonium sulfate products and reduce product quality. Summary of the Invention

[0005] The purpose of this invention is to provide a deammoniation system that can monitor the crystal ratio and acidity in the mother liquor in real time with high detection accuracy, which helps to accurately control the amount of acid added and ensure the particle consistency of the produced ammonium sulfate product.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The ammonia removal system includes a first saturator, a full-flow tank, a crystallization tank, a first crystallization pump, and a centrifuge. The outlet of the first saturator is connected to the inlet of the crystallization tank via a first external pipeline for sending mother liquor containing crystals. The first crystallization pump is installed on the first external pipeline for sending mother liquor containing crystals. The crystallization outlet of the crystallization tank is connected to the centrifuge. The liquid outlet of the centrifuge is connected to the first saturator. The reflux port at the top of the crystallization tank is connected to the first saturator via a mother liquor reflux pipeline. The full-flow port of the first saturator is connected to the full-flow tank via a full-flow pipeline. The full-flow port of the full-flow tank is connected to the mother liquor inlet of the first saturator via a full-flow reflux pipeline.

[0008] The deammoniation system also includes a measuring component, which includes a crystal ratio measuring buffer tank and an acidity measuring buffer tank arranged in series. The inlet of the crystal ratio measuring buffer tank is connected to the outlet of the first crystallization pump, the outlet of the crystal ratio measuring buffer tank is connected to the inlet of the first crystallization pump, and the outlet of the acidity measuring buffer tank is connected to the full flow tank.

[0009] Optionally, the measuring assembly further includes density detectors, a plurality of which are spaced apart along the height direction inside the crystal ratio measuring buffer tank for detecting the crystal density inside the crystal ratio measuring buffer tank.

[0010] Optionally, the inlet of the crystal ratio measurement buffer tank is connected to the outlet of the first crystallization pump through a first sampling pipeline. A first sampling control valve and a first flow valve are installed on the first sampling pipeline, and the first flow valve is located downstream of the first sampling control valve.

[0011] Optionally, the measuring assembly further includes a second sampling pipeline, one end of which extends below the liquid surface in the crystal ratio measuring buffer tank, and the other end is connected to the inlet of the acidity measuring buffer tank. The second sampling pipeline is equipped with a second sampling control valve, a second flow valve, and a sampling pump. The second flow valve is located downstream of the second sampling control valve, and the sampling pump is located between the second flow valve and the second sampling control valve.

[0012] Optionally, the measuring assembly further includes a water injector, an indicator injector, an alkali injector, and a color sensor. The water injector, the indicator injector, and the alkali injector are respectively used to inject water, an indicator, and an alkali into the acidity measuring buffer tank. The color sensor is disposed inside the acidity measuring buffer tank and is used to detect changes in the color of the liquid inside the acidity measuring buffer tank.

[0013] Optionally, the measuring assembly further includes a stirrer disposed at the bottom of the acidity measuring buffer tank for stirring the liquid inside the acidity measuring buffer tank.

[0014] Optionally, the measurement component further includes a controller and a display. Each density detector is communicatively connected to the controller. The density detector can send the detected crystal density information to the controller. The controller can send the received crystal density information to the display and control the display to display the crystal density information.

[0015] Optionally, the system further includes a rinsing assembly, which includes a clean water storage tank, a rinsing pipeline, and a connecting pipeline. One end of the rinsing pipeline is connected to the clean water storage tank, and the other end is connected to the bottom of the crystal ratio measuring buffer tank. A first rinsing control valve is installed on the rinsing pipeline. The connecting pipeline connects the upper part of the crystal ratio measuring buffer tank and the upper part of the acidity measuring buffer tank. A second rinsing control valve is installed on the connecting pipeline.

[0016] Optionally, a third flow valve is also installed on the connecting pipeline, the third flow valve being located downstream of the second flushing control valve.

[0017] Optionally, it also includes a sulfuric acid tank and an acid pump. The sulfuric acid tank is connected to the full-flow tank through a sulfuric acid injection pipeline, and the acid pump is installed on the sulfuric acid injection pipeline. The acid pump is a variable frequency magnetic pump.

[0018] The beneficial effects of this invention are:

[0019] The ammonia removal system provided by this invention includes a first saturator, a full-flow tank, a crystallization tank, a first crystallization pump, a centrifuge, and a measuring component. The outlet of the first saturator is connected to the inlet of the crystallization tank via a first external pipeline containing crystallized mother liquor. The first crystallization pump is installed on the first external pipeline containing crystallized mother liquor. The crystallization outlet of the crystallization tank is connected to the centrifuge, and the liquid outlet of the centrifuge is connected to the first saturator. The reflux port at the top of the crystallization tank is connected to the first saturator via a mother liquor reflux pipeline. A crystallization cycle is formed between the first saturator, the first crystallization pump, the crystallization tank, and the centrifuge. The full-flow port of the first saturator is connected to the full-flow tank via a full-flow pipeline, and the full-flow port of the full-flow tank is connected to the mother liquor inlet of the first saturator via a full-flow reflux pipeline, forming a mother liquor cycle between the first saturator and the full-flow tank. The measuring assembly includes a crystal ratio measuring buffer tank and an acidity measuring buffer tank connected in series. The inlet of the crystal ratio measuring buffer tank is connected to the outlet of the first crystallization pump, and the outlet of the crystal ratio measuring buffer tank is connected to the inlet of the first crystallization pump. The outlet of the acidity measuring buffer tank is connected to the full-flow tank. The measuring assembly extracts crystallized mother liquor from the outlet of the first crystallization pump and sequentially passes it through the crystal ratio measuring buffer tank and the acidity measuring buffer tank to measure the crystal ratio and acidity in the mother liquor. This allows for real-time monitoring of the crystal ratio and acidity in the mother liquor, with high accuracy, which helps to precisely control the amount of acid added and ensure the particle consistency of the produced ammonium sulfate product. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the ammonia removal system provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the measurement component provided in an embodiment of the present invention.

[0023] In the picture:

[0024] 1. First saturator; 2. First mother liquor containing crystals delivery pipeline; 3. First crystallization pump; 4. Crystallization tank; 5. Mother liquor return pipeline; 6. Centrifuge; 7. Screw conveyor; 8. Vibrating bed; 9. Ammonium sulfate storage hopper; 10. Full-flow pipeline; 11. Full-flow tank; 12. Small mother liquor pump; 13. Full-flow return pipeline; 14. Second saturator; 15. Second mother liquor containing crystals delivery pipeline; 16. Second crystallization pump; 17. Sulfuric acid tank; 18. Sulfuric acid injection pipeline; 19. Acid addition pump;

[0025] 100. Measuring component; 101. Crystal ratio measuring buffer tank; 102. Density measuring element; 103. First sampling pipeline; 104. First sampling control valve; 105. First flow valve; 106. First vent valve; 107. Acidity measuring buffer tank; 108. Second sampling pipeline; 109. Second sampling control valve; 110. Second flow valve; 111. Sampling pump; 112. Indicator injector; 113. Alkali injector; 114. Alkali measuring valve; 115. Color sensor; 116. Stirring element; 117. Controller; 118. Display; 119. Second vent valve;

[0026] 200. Flushing assembly; 201. Clean water storage tank; 202. Flushing pipeline; 203. Connecting pipeline; 204. First flushing control valve; 205. Second flushing control valve; 206. Third flow valve. Detailed Implementation

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] Example 1

[0036] This embodiment provides an ammonia removal system for producing ammonium sulfate granules from coke oven gas using an ammonia removal process. For example... Figure 1 As shown, the ammonia removal system includes a first saturator 1, a full-flow tank 11, a crystallization tank 4, a first crystallization pump 3, a centrifuge 6, and a measuring component 100.

[0037] The discharge port of the first saturator 1 is connected to the inlet of the crystallization tank 4 via the first mother liquor containing crystallizer external delivery pipeline 2. The first crystallization pump 3 is installed on the first mother liquor containing crystallizer external delivery pipeline 2. The crystallization outlet of the crystallization tank 4 is connected to the centrifuge 6. The liquid outlet of the centrifuge 6 is connected to the first saturator 1. The reflux port at the top of the crystallization tank 4 is connected to the first saturator 1 via the mother liquor reflux pipeline 5. A crystallization cycle is formed between the first saturator 1, the first crystallization pump 3, the crystallization tank 4, and the centrifuge 6.

[0038] Optionally, a screw conveyor 7, a vibrating bed 8, and an ammonium sulfate storage hopper 9 are sequentially arranged downstream of the centrifuge 6. The crystal slurry after primary solid-liquid separation in the crystallization tank 4 is sent to the centrifuge 6 for centrifugal dehydration to obtain ammonium sulfate crystals. The dehydrated ammonium sulfate crystals are then conveyed by the screw conveyor 7 to the vibrating bed 8 for drying and cooling (the drying and cooling process involves hot and cold air being blown in sequentially by a hot air blower and a cold air blower, respectively, causing the ammonium sulfate flowing through the vibrating bed 8 to be dried and then cooled, becoming solid ammonium sulfate). The obtained ammonium sulfate product is then stored in the ammonium sulfate storage hopper 9 after passing through the vibrating bed 8.

[0039] Meanwhile, the full flow port of the first saturator 1 is connected to the full flow tank 11 through the full flow pipe 10, and the full flow port of the full flow tank 11 is connected to the mother liquor inlet of the first saturator 1 through the full flow return pipe 13, thus forming a mother liquor circulation between the first saturator 1 and the full flow tank 11.

[0040] Specifically, a small mother liquor pump 12 is installed on the full-flow return pipeline 13. The small mother liquor pump 12 can transport the mother liquor in the full-flow tank 11 to the spray chamber of the first saturator 1, thereby realizing the circulation of mother liquor.

[0041] Optionally, continue to refer to Figure 1The ammonia removal system also includes a sulfuric acid tank 17, a sulfuric acid injection pipeline 18, and an acid pump 19. The sulfuric acid tank 17 is connected to the full-flow tank 11 via the sulfuric acid injection pipeline 18, and the acid pump 19 is installed on the sulfuric acid injection pipeline 18. In this embodiment, the acid pump 19 is a variable frequency magnetic pump. The variable frequency magnetic pump utilizes the working principle of a permanent magnet coupling, transmitting torque through the magnetic field via the air gap and the thin wall of the isolation sleeve, driving the inner rotor to rotate, thereby achieving power transmission. This structure fundamentally eliminates the leakage path of the shaft seal, achieving complete sealing. Simultaneously, the variable frequency magnetic pump also has advantages such as corrosion resistance, energy saving, and ease of maintenance.

[0042] Continue to refer to Figure 1 and Figure 2 The measuring component 100 includes a crystal ratio measuring buffer tank 101 and an acidity measuring buffer tank 107 connected in series. The inlet of the crystal ratio measuring buffer tank 101 is connected to the outlet of the first crystallization pump 3, and the outlet of the crystal ratio measuring buffer tank 101 is connected to the inlet of the first crystallization pump 3. The outlet of the acidity measuring buffer tank 107 is connected to the full flow tank 11. The measuring component 100 extracts crystallized mother liquor from the outlet of the first crystallization pump 3 and sequentially passes it through the crystal ratio measuring buffer tank 101 and the acidity measuring buffer tank 107 to measure the crystal ratio and acidity in the mother liquor. This allows for real-time monitoring of the crystal ratio and acidity in the mother liquor, providing high accuracy and helping to precisely control the amount of acid added, ensuring the particle consistency of the produced ammonium sulfate product.

[0043] Specifically, the measuring assembly 100 further includes a plurality of density detectors 102, which are spaced apart along the height direction within the crystal ratio measuring buffer tank 101 to detect the crystal density within the tank. In this embodiment, the density detectors 102 may be density sensors as used in the prior art. The plurality of density sensors are arranged sequentially along the height direction, thereby enabling density measurements of the crystal-containing mother liquor within the crystal ratio measuring buffer tank 101 at various heights.

[0044] More specifically, the inlet of the crystal ratio measuring buffer tank 101 is connected to the outlet of the first crystallization pump 3 via a first sampling pipeline 103. A first sampling control valve 104 and a first flow valve 105 are installed on the first sampling pipeline 103, with the first flow valve 105 located downstream of the first sampling control valve 104. The first sampling control valve 104 controls the opening and closing of the first sampling pipeline 103, and the first flow valve 105 detects the flow rate of the mother liquor flowing through the first sampling pipeline 103. For example, the first sampling control valve 104 can be selected as a solenoid valve from the prior art.

[0045] More specifically, the measuring assembly 100 also includes a second sampling pipe 108, one end of which extends below the liquid surface in the crystal ratio measuring buffer tank 101, and the other end is connected to the inlet of the acidity measuring buffer tank 107. The second sampling pipe 108 connects the crystal ratio measuring buffer tank 101 and the acidity measuring buffer tank 107, thereby enabling direct acidity measurement after the crystal ratio measurement is completed, improving measurement efficiency.

[0046] Preferably, a second sampling control valve 109, a second flow valve 110, and a sampling pump 111 are installed on the second sampling pipeline 108. The second flow valve 110 is located downstream of the second sampling control valve 109, and the sampling pump 111 is disposed between the second flow valve 110 and the second sampling control valve 109. The second sampling control valve 109 is used to control the on / off state of the second sampling pipeline 108, the sampling pump 111 is used to pump the mother liquor in the crystal ratio measurement buffer tank 101 to the acidity measurement buffer tank 107, and the second flow valve 110 is used to detect the flow rate of the mother liquor flowing in the second sampling pipeline 108. Exemplarily, the second sampling control valve 109 can be selected as a solenoid valve in the prior art.

[0047] Furthermore, to facilitate acidity measurement, the measuring assembly 100 also includes a water injector, an indicator injector 112, an alkali injector 113, and a color sensor 115. The water injector, indicator injector 112, and alkali injector 113 are used to inject water, indicator, and alkali solution into the acidity measuring buffer tank 107, respectively. The color sensor 115 is disposed inside the acidity measuring buffer tank 107 to detect color changes in the liquid within the tank. In this embodiment, the indicator injector 112 contains methyl orange reagent, and the alkali injector 113 contains potassium hydroxide solution. First, 6 ml of water is added to 2.5 ml of mother liquor, then 3 drops of methyl orange (approximately 1.5 ml) are added, and finally, potassium hydroxide is added. When the color of the mother liquor in the acidity measuring buffer tank 107 changes from red to yellow, it indicates that the mother liquor has changed from acidic to neutral, and the number of milliliters of alkali solution used is the percentage of acidity in the mother liquor.

[0048] To more accurately read the dosage of indicator and alkali solution, an indicator measuring valve is also provided on the indicator injection line of the indicator injection device 112, and an alkali measuring valve 114 is also provided on the alkali injection line of the alkali injection device 113. Both the indicator measuring valve and the alkali measuring valve 114 are flow valves.

[0049] Optionally, the measuring assembly 100 also includes a stirrer 116, which is disposed at the bottom of the acidity measuring buffer tank 107 and is used to stir the liquid in the acidity measuring buffer tank 107 to promote the acid-base neutralization reaction to be completed more quickly.

[0050] Preferably, the measuring assembly 100 further includes a controller 117 and a display 118. Each density detector 102 is communicatively connected to the controller 117. The density detector 102 can send the detected crystal density information to the controller 117, and the controller 117 can send the received crystal density information to the display 118 and control the display 118 to display the crystal density information. The controller 117 is also communicatively connected to the alkali solution measuring valve 114 to receive information on the amount of alkali solution used, thereby calculating the acidity percentage of the mother liquor and controlling the display 118 to display the acidity percentage. Exemplarily, the controller 117 can be selected as a PLC control system in the prior art.

[0051] like Figure 1 and Figure 2 As shown, the deammoniation system also includes a flushing assembly 200, which flushes the crystal ratio measurement buffer tank 101 and the acidity measurement buffer tank 107 after each measurement of crystal ratio and acidity by the measuring assembly 100, in order to ensure the accuracy of the measurement in the next measurement.

[0052] Specifically, the rinsing assembly 200 includes a clean water storage tank 201, a rinsing pipeline 202, and a connecting pipeline 203. One end of the rinsing pipeline 202 is connected to the clean water storage tank 201, and the other end is connected to the bottom of the crystal ratio measuring buffer tank 101. A first rinsing control valve 204 is installed on the rinsing pipeline 202 to control the opening and closing of the rinsing pipeline 202. The connecting pipeline 203 connects the upper part of the crystal ratio measuring buffer tank 101 and the upper part of the acidity measuring buffer tank 107. A second rinsing control valve 205 is installed on the connecting pipeline 203 to control the opening and closing of the connecting pipeline 203. Both the first rinsing control valve 204 and the second rinsing control valve 205 can be selected as solenoid valves in the prior art.

[0053] Understandably, the connecting pipe 203 can inject clean water into the acidity measuring buffer tank 107; that is, the connecting pipe 203 can replace the aforementioned clean water injection device. To accurately measure the amount of clean water injected into the acidity measuring buffer tank 107 by the connecting pipe 203, a third flow valve 206 is installed on the connecting pipe 203. The third flow valve 206 is located downstream of the second flushing control valve 205.

[0054] The measurement operation of the crystal ratio measurement buffer tank 101 provided in this embodiment is as follows:

[0055] Close the first flushing control valve 204, the second sampling control valve 109, the second flushing control valve 205, and the first drain valve 106. Open the outlet of the first crystallization pump 3, and the mother liquor containing crystals enters the first sampling pipeline 103. Open the first sampling control valve 104 and the first flow valve 105, monitor the flow rate until it reaches 100 ml, then close the first sampling control valve 104. The liquid flows from the first sampling pipeline 103 into the crystal ratio measurement buffer tank 101 and remains there. The density is sensed using multiple density detectors 102 arranged along the height direction, resulting in a density of 1.77 g / cm³. 2 The crystal is analyzed to determine the crystal ratio, which is then transmitted to the display 118 for display via the controller 117.

[0056] The measurement operation of the acidity measurement buffer tank 107 provided in this embodiment is as follows:

[0057] After the supernatant mother liquor in the crystal ratio measurement buffer tank 101 has settled, the second sampling control valve 109 is opened, and the sampling pump 111 is started. The supernatant mother liquor is drawn into the acidity measurement buffer tank 107 through the second sampling pipeline 108. The second flow valve 110 monitors the flow rate at 2.5 ml, stops the sampling pump 111, and closes the second sampling control valve 109. At this time, the first vent valve 106 is opened, and the crystallized liquid in the crystal ratio measurement buffer tank 101 is discharged to the inlet of the first crystallization pump 3. The second flushing control valve 205 is opened to flush the crystal ratio measurement buffer tank 101 clean. Once the density sensor 102 detects the density of clean water, the first vent valve 106 is closed, and the second flushing control valve 205 is opened. Clean water flows into the acidity measurement buffer tank 107 through the connecting pipeline 203. After the flow rate is monitored to be 6 ml by the third flow valve 206, the first flushing control valve 204 is closed. At this time, the indicator control valve is opened. After the flow rate of the indicator measuring valve is monitored to be 3 drops (about 1.5 ml), the indicator control valve is closed. The stirrer 116 is started, the alkali control valve is opened, the alkali measuring valve 114 monitors the flow rate, and the color sensor 115 detects the color of the mother liquor. If it changes from red to yellow, the alkali control valve is closed. The flow rate measured by the alkali measuring valve is the amount of alkali used in the acid-base neutralization process, which is the acidity percentage. This data is transmitted to the display 118 for display via the controller 117.

[0058] The rinsing operation of the rinsing assembly 200 provided in this embodiment is as follows:

[0059] Open the first flushing control valve 204, the second flushing control valve 205, and the second drain valve 119. After setting the flushing time to 5 minutes, close the first flushing control valve 204, the second flushing control valve 205, and the second drain valve 119. The flushing is now complete.

[0060] In this embodiment, the deammoniation system can also simultaneously control the crystal ratio and acidity of the mother liquor in multiple saturators to further improve the ammonium sulfate production efficiency.

[0061] like Figure 1 As shown, the ammonia removal system also includes a second saturator 14 and a second crystallization pump 16. The second saturator 14 and the second crystallization pump 16 are connected in parallel with the first saturator 1 and the first crystallization pump 3.

[0062] Specifically, the outlet of the second saturator 14 is connected to the first crystallizing mother liquor delivery pipeline 2 via the second crystallizing mother liquor delivery pipeline 15, and a second crystallization pump 16 is installed on the second crystallizing mother liquor delivery pipeline 15. The full-flow outlet of the first saturator 1 is connected to the second saturator 14 via the full-flow pipeline 10, and the full-flow outlet of the second saturator 14 is connected to the full-flow tank 11 via the full-flow pipeline 10. The full-flow outlet of the full-flow tank 11 is connected to the mother liquor inlets of the first saturator 1 and the second saturator 14 via the full-flow return pipeline 13. The sampling point of the measuring component 100 is located downstream of the connection point between the second crystallizing mother liquor delivery pipeline 15 and the first crystallizing mother liquor delivery pipeline 2, to ensure that the mother liquor extracted by the measuring component 100 is a mixture of the mother liquor in the first saturator 1 and the mother liquor in the second saturator 14. The outlet of the crystal ratio measuring buffer tank 101 is connected to the inlet of the first crystallization pump 3 and / or the second crystallization pump 16 to discharge the measured crystal-containing mother liquor.

[0063] Preferably, a portion of the first crystallizing mother liquor delivery pipeline 2 upstream of the first crystallization pump 3 and a portion of the second crystallizing mother liquor delivery pipeline 15 upstream of the second crystallization pump 16 are connected via a bypass pipeline equipped with a bypass valve. This configuration allows for the transport of mother liquor through other pathways via the bypass pipeline in the event of blockage or leakage in either the first crystallizing mother liquor delivery pipeline 2 or the second crystallizing mother liquor delivery pipeline 15, thus reducing the impact on the ammonia removal system.

[0064] Of course, in other embodiments, three, four or more saturators can be connected in parallel. Those skilled in the art can determine the number of saturators according to actual needs. The parallel connection method is the same as that of the second saturator 14, and will not be described in detail here.

[0065] Example 2

[0066] This embodiment provides a deammoniation system, which is basically the same as the deammoniation system provided in Embodiment 1. The difference between this embodiment and Embodiment 1 is that, in this embodiment, an acid addition control valve is also provided on the sulfuric acid injection pipeline 18. The acid addition control valve is located downstream of the acid addition pump 19 and can control the on / off state of the sulfuric acid injection pipeline 18.

[0067] For example, the acid control valve may be a solenoid valve as used in the prior art.

[0068] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. Ammonia removal system, characterized in that, The system includes a first saturator (1), a full-flow tank (11), a crystallization tank (4), a first crystallization pump (3), and a centrifuge (6). The outlet of the first saturator (1) is connected to the inlet of the crystallization tank (4) through a first external pipeline (2) containing crystallized mother liquor. The first crystallization pump (3) is installed on the first external pipeline (2) containing crystallized mother liquor. The crystallization outlet of the crystallization tank (4) is connected to the centrifuge (6). The liquid outlet of the centrifuge (6) is connected to the first saturator (1). The reflux port at the top of the crystallization tank (4) is connected to the first saturator (1) through a mother liquor reflux pipeline (5). The full-flow port of the first saturator (1) is connected to the full-flow tank (11) through a full-flow pipeline (10). The full-flow port of the full-flow tank (11) is connected to the mother liquor inlet of the first saturator (1) through a full-flow reflux pipeline (13). The deammonia removal system also includes a measuring component (100), which includes a crystal ratio measuring buffer tank (101) and an acidity measuring buffer tank (107) connected in series. The inlet of the crystal ratio measuring buffer tank (101) is connected to the outlet of the first crystallization pump (3), the outlet of the crystal ratio measuring buffer tank (101) is connected to the inlet of the first crystallization pump (3), and the outlet of the acidity measuring buffer tank (107) is connected to the full flow tank (11). The measurement assembly (100) further includes density detection elements (102), and a plurality of density detection elements (102) are spaced apart along the height direction inside the crystal ratio measurement buffer tank (101) for detecting the crystal density inside the crystal ratio measurement buffer tank (101); The measuring component (100) further includes a water injector, an indicator injector (112), an alkali injector (113), and a color sensor (115). The water injector, the indicator injector (112), and the alkali injector (113) are used to inject water, an indicator, and an alkali into the acidity measuring buffer tank (107), respectively. The color sensor (115) is disposed in the acidity measuring buffer tank (107) and is used to detect changes in the color of the liquid in the acidity measuring buffer tank (107).

2. The ammonia removal system according to claim 1, characterized in that, The inlet of the crystal ratio measurement buffer tank (101) is connected to the outlet of the first crystallization pump (3) through the first sampling pipeline (103). The first sampling pipeline (103) is equipped with a first sampling control valve (104) and a first flow valve (105). The first flow valve (105) is located downstream of the first sampling control valve (104).

3. The ammonia removal system according to claim 1, characterized in that, The measuring assembly (100) further includes a second sampling pipeline (108), one end of which extends below the liquid surface in the crystal ratio measuring buffer tank (101), and the other end is connected to the inlet of the acidity measuring buffer tank (107). A second sampling control valve (109), a second flow valve (110), and a sampling pump (111) are installed on the second sampling pipeline (108). The second flow valve (110) is located downstream of the second sampling control valve (109), and the sampling pump (111) is located between the second flow valve (110) and the second sampling control valve (109).

4. The ammonia removal system according to claim 1, characterized in that, The measuring component (100) also includes a stirring element (116), which is disposed at the bottom of the acidity measuring buffer tank (107) and is used to stir the liquid in the acidity measuring buffer tank (107).

5. The ammonia removal system according to claim 1, characterized in that, The measurement component (100) further includes a controller (117) and a display (118). Each density detector (102) is communicatively connected to the controller (117). The density detector (102) can send the detected crystal density information to the controller (117). The controller (117) can send the received crystal density information to the display (118) and control the display (118) to display the crystal density information.

6. The ammonia removal system according to claim 1, characterized in that, It also includes a rinsing assembly (200), which includes a clean water storage tank (201), a rinsing pipeline (202), and a connecting pipeline (203). One end of the rinsing pipeline (202) is connected to the clean water storage tank (201), and the other end is connected to the bottom of the crystal ratio measuring buffer tank (101). A first rinsing control valve (204) is installed on the rinsing pipeline (202). The connecting pipeline (203) connects the upper part of the crystal ratio measuring buffer tank (101) and the upper part of the acidity measuring buffer tank (107). A second rinsing control valve (205) is installed on the connecting pipeline (203).

7. The ammonia removal system according to claim 6, characterized in that, A third flow valve (206) is also installed on the connecting pipe (203), and the third flow valve (206) is located downstream of the second flushing control valve (205).

8. The ammonia removal system according to any one of claims 1-7, characterized in that, It also includes a sulfuric acid tank (17) and an acid pump (19). The sulfuric acid tank (17) is connected to the full-flow tank (11) through a sulfuric acid injection pipeline (18). The acid pump (19) is installed on the sulfuric acid injection pipeline (18) and is a variable frequency magnetic pump.

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