Deamination system

Abstract

The invention 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 centrifugal machine and a measuring assembly. Crystallization circulation is formed among the first saturator, the first crystallization pump, the crystallization tank and the centrifugal machine, and mother liquor circulation 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 which are arranged in series, a feed port of the crystal ratio measuring buffer tank is communicated with a discharge port of the first crystallization pump, a discharge port of the crystal ratio measuring buffer tank is communicated with a feed port of the first crystallization pump, and a discharge port of the acidity measuring buffer tank is communicated with the full flow groove. According to the deamination system, the crystal ratio and acidity conditions in the mother liquor can be monitored in real time through the measuring assembly, the detection accuracy is high, the acid adding amount can be accurately controlled, and the particle consistency of produced ammonium sulfate products is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of coke oven gas deamination, in particular to a deamination system. Background Art

[0002] In the coking industry, a large amount of coke oven gas is produced during the coke production process. The coke oven gas contains more tar, benzene, ammonia and other substances. Therefore, coking enterprises use ammonium sulfate process in coking production equipment to recover ammonia in the gas.

[0003] The purification steps of coke oven gas generally include condensation, deamination, benzene elution and other processes. During the deamination process, ammonia in the coke oven gas is removed and ammonium sulfate byproduct is obtained. Traditional deamination equipment is generally a saturator, and the absorption of ammonia and the crystallization of ammonium sulfate are both carried out in the saturator. In order to ensure the consistency of the ammonium sulfate product particles produced, the supersaturation of the mother liquor in the saturator needs to be controlled. The staff usually takes samples at the outlet of the crystallization pump, and a part of the mother liquor sample is placed in a measuring cylinder, and the ammonium sulfate crystal ratio in the mother liquor is obtained by the density difference sedimentation method; the other part of the mother liquor sample is measured by manual titration to measure the mother liquor acidity.

[0004] However, there are certain data deviations when measuring the crystal ratio and acidity of the mother liquor by manual sampling, standing or titration. The measurement accuracy is low, and the adjustment is relatively lagging and not timely, which can easily lead to large differences in the particle size of the ammonium sulfate product produced and reduce product quality. Summary of the invention

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

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A deammoniation system, comprising a first saturator, a full flow tank, a crystallization tank, a first crystallization pump and a centrifuge, wherein the discharge port of the first saturator is connected to the feed port of the crystallization tank through a first crystal-containing mother liquor delivery pipeline, the first crystallization pump is installed on the first crystal-containing mother liquor delivery pipeline, 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 through a mother liquor reflux pipeline, the full flow port of the first saturator is connected to the full flow tank through 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 through a full flow reflux pipeline;

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

[0009] Optionally, the measurement component further includes a density detection member, and a plurality of the density detection members are arranged in the crystal ratio measurement buffer tank at intervals along the height direction to detect the crystal density in the crystal ratio measurement 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, and 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 measurement component also includes a second sampling pipeline, one end of the second sampling pipeline extends below the liquid level in the crystal ratio measurement buffer tank, and the other end is connected to the feed port of the acidity measurement buffer tank. A second sampling control valve, a second flow valve and a sampling pump are installed on the second sampling pipeline. The second flow valve is located downstream of the second sampling control valve, and the sampling pump is arranged between the second flow valve and the second sampling control valve.

[0012] Optionally, the measuring component also includes a clean water injection piece, an indicator injection piece, an alkali solution injection piece and a color sensor, the clean water injection piece, the indicator injection piece and the alkali solution injection piece are respectively used to inject clean water, an indicator and alkali solution into the acidity measurement buffer tank, and the color sensor is arranged in the acidity measurement buffer tank to detect the color change of the liquid in the acidity measurement buffer tank.

[0013] Optionally, the measuring component further comprises a stirring member, which is disposed at the bottom of the acidity measurement buffer tank and is used to stir the liquid in the acidity measurement buffer tank.

[0014] Optionally, the measuring component also includes a controller and a display, each of the density detection components is communicatively connected to the controller, the density detection component 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, a flushing component is also included, which includes a clean water storage tank, a flushing pipeline and a connecting pipeline, one end of the flushing pipeline is connected to the clean water storage tank, and the other end is connected to the bottom of the crystal ratio measurement buffer tank, and a first flushing control valve is installed on the flushing pipeline, and the connecting pipeline is connected to the upper part of the crystal ratio measurement buffer tank and the upper part of the acidity measurement buffer tank, and a second flushing control valve is installed on the connecting pipeline.

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

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

[0018] Beneficial effects of the present invention:

[0019] The deammoniation system provided by the present invention includes a first saturator, a full flow tank, a crystallization tank, a first crystallization pump, a centrifuge and a measuring assembly. Among them, the discharge port of the first saturator is connected to the feed port of the crystallization tank through the first crystallization mother liquor delivery pipeline, the first crystallization pump is installed on the first crystallization mother liquor delivery pipeline, the crystallization outlet of the crystallization tank is connected to the centrifuge, the liquid outlet of the centrifuge is connected to the first saturator, and the reflux port on the upper part of the crystallization tank is connected to the first saturator through the 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 through the full flow pipeline, the full flow port of the full flow tank is connected to the mother liquor inlet of the first saturator through the full flow reflux pipeline, and a mother liquor cycle is formed between the first saturator and the full flow tank. The measuring component includes a crystal ratio measurement buffer tank and an acidity measurement buffer tank arranged in series, the feed inlet of the crystal ratio measurement buffer tank is connected to the discharge port of the first crystallization pump, the discharge port of the crystal ratio measurement buffer tank is connected to the feed port of the first crystallization pump, and the discharge port of the acidity measurement buffer tank is connected to the full flow tank. The measuring component extracts the mother liquor containing crystals at the outlet of the first crystallization pump, and measures the crystal ratio and acidity in the mother liquor through the crystal ratio measurement buffer tank and the acidity measurement buffer tank in turn, so that the crystal ratio and acidity in the mother liquor can be monitored in real time, the detection accuracy is high, it is helpful to accurately control the amount of acid addition, and ensure the particle consistency of the produced ammonium sulfate product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0021] Figure 1 is a schematic structural diagram of a deammoniation system provided in an embodiment of the present invention;

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

[0023] In the figure:

[0024] 1. First saturator; 2. First mother liquor containing crystals for external delivery; 3. First crystallization pump; 4. Crystallization tank; 5. Mother liquor reflux 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 reflux pipeline; 14. Second saturator; 15. Second mother liquor containing crystals for external delivery pipeline; 16. Second crystallization pump; 17. Sulfuric acid tank; 18. Sulfuric acid injection pipeline; 19. Acid adding pump;

[0025] 100, measuring assembly; 101, crystal ratio measurement buffer tank; 102, density detection member; 103, first sampling pipeline; 104, first sampling control valve; 105, first flow valve; 106, first drain valve; 107, acidity measurement buffer tank; 108, second sampling pipeline; 109, second sampling control valve; 110, second flow valve; 111, sampling pump; 112, indicator injection member; 113, alkali solution injection member; 114, alkali solution measurement valve; 115, color sensor; 116, stirring member; 117, controller; 118, display; 119, second drain 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 DESCRIPTION

[0027] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] Embodiment 1

[0036] This embodiment provides a deamination system for producing ammonium sulfate particles using a deamination process in coke oven gas. Figure 1 As shown, the deammoniation 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] Among them, the discharge port of the first saturator 1 is connected to the feed port of the crystallization tank 4 through the first crystallization mother liquor delivery pipeline 2, the first crystallization pump 3 is installed on the first crystallization mother liquor 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, and the reflux port at the top of the crystallization tank 4 is connected to the first saturator 1 through 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 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 transported to the vibrating bed 8 via the screw conveyor 7 for drying and cooling (the drying and cooling process is carried out by a hot air blower and a cold air blower to blow hot and cold air in turn, so that the ammonium sulfate flowing through the vibrating bed 8 is dried and then cooled to become solid ammonium sulfate). The obtained ammonium sulfate product passes through the vibrating bed 8 and enters the ammonium sulfate storage hopper 9 for storage.

[0039] At the same time, the full flow port of the first saturator 1 is connected to the full flow tank 11 through the full flow pipeline 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 pipeline 13, so that a mother liquor circulation is formed between the first saturator 1 and the full flow tank 11.

[0040] Specifically, a small mother liquor pump 12 is provided 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 mother liquor circulation.

[0041] Optionally, continue to refer to Figure 1The deammoniation 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 through 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 uses the working principle of the permanent magnetic coupling to transmit torque through the air gap and the thin wall of the isolation sleeve through the magnetic field, driving the inner rotor to rotate, thereby realizing power transmission. This structure fundamentally eliminates the leakage channel of the shaft seal and realizes complete sealing. At the same time, the variable frequency magnetic pump also has the advantages of corrosion resistance, energy saving and easy maintenance.

[0042] Continue to refer to Figure 1 and Figure 2 The measuring component 100 includes a crystal ratio measurement buffer tank 101 and an acidity measurement buffer tank 107 which are arranged in series. The feed port of the crystal ratio measurement buffer tank 101 is connected to the discharge port of the first crystallization pump 3, the discharge port of the crystal ratio measurement buffer tank 101 is connected to the feed port of the first crystallization pump 3, and the discharge port of the acidity measurement buffer tank 107 is connected to the full flow tank 11. The measuring component 100 extracts the mother liquor containing crystals at the outlet of the first crystallization pump 3, and measures the crystal ratio and acidity in the mother liquor through the crystal ratio measurement buffer tank 101 and the acidity measurement buffer tank 107 in turn, so that the crystal ratio and acidity in the mother liquor can be monitored in real time, with high detection accuracy, which is helpful to accurately control the amount of acid addition and ensure the particle consistency of the produced ammonium sulfate product.

[0043] Specifically, the measuring assembly 100 further includes a plurality of density detection members 102, which are arranged in the crystal ratio measurement buffer tank 101 at intervals along the height direction, so as to detect the crystal density in the crystal ratio measurement buffer tank 101. In this embodiment, the density detection member 102 can be selected as a density sensor in the prior art. The plurality of density sensors are arranged in sequence along the height direction, so that the density of the mother liquor containing crystals in the crystal ratio measurement buffer tank 101 can be measured at various heights.

[0044] Specifically, the feed port of the crystal ratio measurement buffer tank 101 is connected to the discharge port of the first crystallization pump 3 through the first sampling pipeline 103, and the first sampling control valve 104 and the first flow valve 105 are installed on the first sampling pipeline 103, and the first flow valve 105 is located downstream of the first sampling control valve 104. The first sampling control valve 104 is used to control the on-off of the first sampling pipeline 103, and the first flow valve 105 is used to detect the flow of the mother liquor circulating in the first sampling pipeline 103. Exemplarily, the first sampling control valve 104 can be selected as a solenoid valve in the prior art.

[0045] More specifically, the measuring assembly 100 further includes a second sampling pipeline 108, one end of which extends below the liquid level in the crystal ratio measurement buffer tank 101, and the other end of which is connected to the feed port of the acidity measurement buffer tank 107. The second sampling pipeline 108 connects the crystal ratio measurement buffer tank 101 and the acidity measurement buffer tank 107, so that after the crystal ratio measurement is completed, the acidity measurement can be directly performed, thereby improving the measurement operation efficiency.

[0046] Preferably, the second sampling pipeline 108 is equipped with a second sampling control valve 109, a second flow valve 110 and a sampling pump 111, the second flow valve 110 is located downstream of the second sampling control valve 109, and the sampling pump 111 is arranged 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 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 of the mother liquor circulating 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] Further, in order to facilitate the acidity measurement, the measuring assembly 100 also includes a clean water injection part, an indicator injection part 112, an alkali solution injection part 113 and a color sensor 115. The clean water injection part, the indicator injection part 112 and the alkali solution injection part 113 are respectively used to inject clean water, an indicator and an alkali solution into the acidity measurement buffer tank 107, and the color sensor 115 is arranged in the acidity measurement buffer tank 107 to detect the color change of the liquid in the acidity measurement buffer tank 107. In the present embodiment, the methyl orange reagent is contained in the indicator injection part 112, and the potassium hydroxide solution is contained in the alkali solution injection part 113. First, 6 milliliters of clean water are added to 2.5 milliliters of mother liquor, and then 3 drops of methyl orange (about 1.5 milliliters) are dripped, and finally potassium hydroxide is dripped. When the color of the mother liquor in the acidity measurement buffer tank 107 changes from red to yellow, it proves that the mother liquor changes from acidity to neutrality, and the number of milliliters of the alkali solution used is the percentage of the mother liquor acidity.

[0048] In order to more accurately read the amount of indicator and alkali solution, an indicator measuring valve is further provided on the indicator injection pipeline of the indicator injection member 112, and an alkali solution measuring valve 114 is further provided on the alkali solution injection pipeline of the alkali solution injection member 113. Both the indicator measuring valve and the alkali solution measuring valve 114 are flow valves.

[0049] Optionally, the measuring assembly 100 further includes a stirring member 116 , which is disposed at the bottom of the acidity measurement buffer tank 107 and is used to stir the liquid in the acidity measurement buffer tank 107 to promote a faster completion of the acid-base neutralization reaction.

[0050] Preferably, the measuring assembly 100 further includes a controller 117 and a display 118. Each density detection member 102 is connected in communication with the controller 117, and the density detection member 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 connected in communication with the alkali solution measuring valve 114 to receive the usage information of the alkali solution, 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 further includes a flushing component 200, which can flush the crystal ratio measurement buffer tank 101 and the acidity measurement buffer tank 107 after the measurement component 100 measures the crystal ratio and the acidity each time, so as to ensure the measurement accuracy in the next measurement.

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

[0053] It is understandable that the connecting pipe 203 can inject clean water into the acidity measurement buffer tank 107, that is, the connecting pipe 203 can replace the above-mentioned clean water injection member. In order to accurately measure the amount of clean water injected into the acidity measurement buffer tank 107 by the connecting pipe 203, a third flow valve 206 is installed on the connecting pipe 203, and 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 to 100ml, close the first sampling control valve 104, and the liquid flows from the first sampling pipeline 103 into the crystal ratio measurement buffer tank 101 and stands still. Use multiple density detection parts 102 arranged in the height direction to sense the density of 1.77g / cm 2 The crystal ratio is determined by the controller 117 and transmitted to the display 118 for display.

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

[0057] After the upper mother liquid in the crystal ratio measurement buffer tank 101 has been left to stand, the second sampling control valve 109 is opened, the sampling pump 111 is started, and the upper mother liquid is pumped from the second sampling pipeline 108 to the acidity measurement buffer tank 107. The second flow valve 110 monitors the flow rate to be 2.5 ml, the sampling pump 111 is shut down, the second sampling control valve 109 is closed, and the first drain valve 106 is opened at this time, and the crystal-containing 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, and when the density detection element 102 senses the density of clean water, the first drain valve 106 is closed, and the second flushing control valve 205 is opened, and clean water flows into the acidity measurement buffer tank 107 through the connecting pipeline 203. After the flow rate is monitored by the third flow valve 206 to be 6 ml, the first flushing control valve 204 is closed, and the indicator control valve is opened at this time. 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 stirring element 116 is started, the alkali solution control valve is opened, the alkali solution 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 solution control valve is closed. The flow rate measured by the alkali solution measuring valve is the amount of alkali solution used in the acid-base neutralization process, that is, the acidity percentage, which is transmitted to the display 118 for display through the controller 117.

[0058] The flushing operation of the flushing 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, set the flushing to 5 minutes, then close the first flushing control valve 204, the second flushing control valve 205 and the second drain valve 119, and the flushing is completed.

[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 deammoniation system further includes a second saturator 14 and a second crystallization pump 16. The second saturator 14 and the second crystallization pump 16 are arranged in parallel with the first saturator 1 and the first crystallization pump 3.

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

[0063] Preferably, part of the first crystallization-containing mother liquor delivery pipeline 2 located upstream of the first crystallization pump 3 is connected to part of the second crystallization-containing mother liquor delivery pipeline 15 located upstream of the second crystallization pump 16 through a bypass pipeline, and a bypass valve is installed on the bypass pipeline. With such an arrangement, when one of the first crystallization-containing mother liquor delivery pipeline 2 or the second crystallization-containing mother liquor delivery pipeline 15 is blocked or leaked, the mother liquor can be transported through other passages connected through the bypass pipeline, thereby reducing the impact on the deammoniation system.

[0064] Of course, in other embodiments, 3, 4 or more saturators may be arranged in parallel, and those skilled in the art may determine the number of saturators according to actual needs. The parallel connection method is the same as that of the second saturator 14, which will not be elaborated here.

[0065] Embodiment 2

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

[0067] Exemplarily, the acid addition control valve may be a solenoid valve 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 embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A deamination system, characterized in that: The invention comprises a first saturator (1), a full flow tank (11), a crystallization tank (4), a first crystallization pump (3) and a centrifuge (6); the discharge port of the first saturator (1) is connected to the feed port of the crystallization tank (4) through a first crystallization mother liquor delivery pipeline (2); the first crystallization pump (3) is installed on the first crystallization mother liquor 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) 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 deamination system further comprises a measuring component (100), wherein the measuring component (100) comprises a crystal ratio measurement buffer tank (101) and an acidity measurement buffer tank (107) which are arranged in series, wherein the inlet of the crystal ratio measurement buffer tank (101) is connected to the outlet of the first crystallization pump (3), the outlet of the crystal ratio measurement buffer tank (101) is connected to the inlet of the first crystallization pump (3), and the outlet of the acidity measurement buffer tank (107) is connected to the full flow tank (11).

2. The deamination system according to claim 1, characterized in that: The measuring component (100) further comprises a density detection member (102), wherein a plurality of the density detection members (102) are arranged in the crystal ratio measurement buffer tank (101) at intervals along a height direction, so as to detect the crystal density in the crystal ratio measurement buffer tank (101).

3. The deamination system according to claim 2, characterized in that: The feed inlet of the crystal ratio measurement buffer tank (101) is connected to the feed outlet of the first crystallization pump (3) through 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); the first flow valve (105) is located downstream of the first sampling control valve (104).

4. The deamination system according to claim 2, characterized in that: The measuring assembly (100) further comprises a second sampling pipeline (108), one end of which extends below the liquid level in the crystal ratio measurement buffer tank (101), and the other end of which is communicated with the feed port of the acidity measurement 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 arranged between the second flow valve (110) and the second sampling control valve (109).

5. The deamination system according to claim 4, characterized in that: The measuring assembly (100) further comprises a clean water injection piece, an indicator injection piece (112), an alkaline solution injection piece (113) and a color sensor (115); the clean water injection piece, the indicator injection piece (112) and the alkaline solution injection piece (113) are respectively used to inject clean water, an indicator and an alkaline solution into the acidity measurement buffer tank (107); the color sensor (115) is arranged in the acidity measurement buffer tank (107) and is used to detect the color change of the liquid in the acidity measurement buffer tank (107).

6. The deamination system according to claim 5, characterized in that: The measuring assembly (100) further comprises a stirring member (116), wherein the stirring member (116) is arranged at the bottom of the acidity measurement buffer tank (107) and is used to stir the liquid in the acidity measurement buffer tank (107).

7. The deamination system according to claim 2, characterized in that: The measuring component (100) further comprises a controller (117) and a display (118), each of the density detection components (102) is communicatively connected to the controller (117), the density detection component (102) is capable of sending the detected crystal density information to the controller (117), the controller (117) is capable of sending the received crystal density information to the display (118), and controlling the display (118) to display the crystal density information.

8. The deamination system according to claim 1, characterized in that: The invention also comprises a flushing assembly (200), wherein the flushing assembly (200) comprises a clean water storage tank (201), a flushing pipeline (202) and a connecting pipeline (203), wherein one end of the flushing pipeline (202) is connected to the clean water storage tank (201), and the other end is connected to the bottom of the crystal ratio measurement buffer tank (101), a first flushing control valve (204) is installed on the flushing pipeline (202), the connecting pipeline (203) is connected to the upper part of the crystal ratio measurement buffer tank (101) and the upper part of the acidity measurement buffer tank (107), and a second flushing control valve (205) is installed on the connecting pipeline (203).

9. The deamination system according to claim 8, characterized in that: A third flow valve (206) is also installed on the connecting pipeline (203), and the third flow valve (206) is located downstream of the second flushing control valve (205).

10. The deamination system according to any one of claims 1 to 9, characterized in that: The invention also comprises a sulfuric acid tank (17) and an acid adding pump (19), wherein the sulfuric acid tank (17) is connected to the full flow tank (11) through a sulfuric acid injection pipeline (18), and the acid adding pump (19) is installed on the sulfuric acid injection pipeline (18), and the acid adding pump (19) is a variable frequency magnetic pump.

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