System for removing cations in organic amine by freezing technology

Abstract

The utility model provides a system for removing cations in organic amine by a freezing technology, which comprises a crystallization cooler arranged on a skid, a liquid inlet of the crystallization cooler is communicated with an outlet of a temporary storage tank for filtered organic amine solvent to be treated, and a freezing unit communicated with the crystallization cooler is arranged on the outer side of the crystallization cooler. According to the utility model, sodium ions in the organic amine liquid can be crystallized before the organic amine liquid enters the collecting tank, so that the problem that positive ions such as the sodium ions in the organic amine liquid are crystallized at positions such as a system pipeline, a heat exchanger, a tower plate and the like to cause blockage and influence the normal operation of the system is solved; the working efficiency of the system pipeline, the heat exchanger and the tower plate is greatly improved, the maintenance and cleaning frequency is reduced, and the operation is more convenient and efficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to organic amine purification treatment equipment technical field, concretely relates to a system of removing cations in organic amine by freezing technology. BACKGROUND

[0002] The oxidation method tail gas removes the system of sulfur dioxide mainly with organic amine as absorbent to absorb the sulfur dioxide in flue gas, and part of sulfate will be produced in organic amine, and a large number of cations, especially sodium ions, will be brought into the system during the operation process due to the upstream tail gas caustic washing or the organic amine liquid purification process.

[0003] A large number of sodium ions will form sodium sulfate crystallization with sulfate in the system, which will seriously affect the normal operation of the system by adhering to the system pipeline, heat exchanger, tower plate and other positions. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a system of removing cations in organic amine by freezing technology, which can lower the temperature of organic amine liquid by freezing crystallization method, so that sodium ions and sulfate form sodium sulfate crystallization in advance, thereby removing cations in organic amine, avoiding crystallization adhesion to the system pipeline, heat exchanger, tower plate and other positions, and affecting the normal operation of the system.

[0005] To solve the above technical problems, the utility model provides a system of removing cations in organic amine by freezing technology, which comprises a crystallization cooler arranged on a pry block, the inlet of the crystallization cooler is connected with the outlet of the filtered organic amine solvent temporary storage tank, a freezer unit is arranged on the outside of the crystallization cooler, the outlet of the cooling crystallizer is connected with a collection tank, the sodium ions in the organic amine liquid can be crystallized before entering the collection tank, thereby avoiding the blockage caused by the crystallization of cations such as sodium ions in the system pipeline, heat exchanger, tower plate and other positions, affecting the normal operation of the system, greatly improving the working efficiency of the system pipeline, heat exchanger and tower plate, reducing the frequency of maintenance and cleaning, and making the operation more convenient and efficient.

[0006] The upper part of the crystallization cooler is provided with a driving member, the output shaft end of the driving member is provided with a stirring rod, the stirring rod penetrates the top of the cooling crystallizer and is rotatably arranged in the cooling crystallizer, and the outside of the stirring rod and the inside of the cooling crystallizer are provided with stirring blades, the output shaft of the driving member can be started to rotate with the stirring rod and the stirring blades, thereby realizing efficient stirring operation of the organic amine solvent to be crystallized in the crystallization cooler, greatly improving the flow of cations in the inside, and improving the efficiency of cooling crystallization.

[0007] The inside of the crystallization cooler is also provided with a serpentine coil, the serpentine coil is located outside the stirring blade, the inlet of the serpentine coil is connected with the outlet of the refrigerating unit, and the outlet of the serpentine coil is connected with the inlet of the refrigerating unit, the circulation flow path of the cooling liquid discharged through the outlet of the refrigerating unit can be greatly prolonged through the serpentine coil in the crystallization cooler, and therefore, the efficient cooling operation of the organic amine solvent in the crystallization cooler is realized, and the operation is more convenient.

[0008] The refrigerating unit is also provided with a circulating cooling liquid inlet and a circulating cooling liquid outlet which are connected with the cooling liquid storage tank, the cooling liquid circulating in the refrigerating unit can be stored and circulated through the cooling liquid storage tank, and the cooling liquid in the cooling liquid storage tank can be supplemented without stopping the machine.

[0009] The bottom of the cooling crystallizer is also provided with a discharge port, the other end of the discharge port is provided with a centrifugal machine which is connected with the discharge port, the outer side of the centrifugal machine is provided with a centrifugal pump, and the outlet of the centrifugal pump is connected with the inlet of the collecting pipe, the cations in the organic amine liquid after crystallization in the cooling crystallizer can be concentrated and efficiently pumped out and collected through the centrifugal pump cooperating with the centrifugal machine, and the operation is more convenient.

[0010] The cooling crystallizer is also provided with a liquid level meter, the liquid level meter can be used to check the liquid condition in the cooling crystallizer in real time, so that the liquid supplementing operation of the cooling liquid or the liquid to be crystallized in the cooling crystallizer can be realized in real time and efficiently, and the operation is more convenient.

[0011] Compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0012] 1、The crystallization and precipitation operation of the cations, especially sodium ions, in the organic amine liquid before entering the system pipeline, heat exchanger and tower plate can be realized through the cooling crystallizer cooperating with the refrigerating unit, so that the problem of pipe blockage caused by crystallization when the cations in the system pipeline, heat exchanger and tower plate participate in the internal liquid circulation operation is avoided, the failure frequency of the system pipeline, heat exchanger and tower plate is greatly reduced, and the service life is prolonged.

[0013] 2、The stirring blade rotatingly arranged in the crystallization cooler and the serpentine coil arranged in the crystallization cooler can realize the efficient stirring of the organic solvent to be crystallized, and the circulation path of the cooling liquid discharged by the refrigerating unit through the serpentine coil in the crystallization cooler is prolonged, so that the cooling efficiency of the cooling crystallizer is improved, and the cooling speed of the cooling crystallizer is greatly improved.

[0014] 3、The utility model discloses can realize the crystallization that passes through the cooling crystallizer cooling separation with the effect of centrifugal pump cooperation centrifuge and carry out the quick efficient pumping operation, greatly improve the cooling crystallization efficiency of the organic amine liquid in cooling crystallizer.

[0015] 4、The utility model discloses can realize the liquid level in the crystallization cooler with liquid level meter and carry out real -time viewing operation, and the operator is convenient timely according to the liquid level in the crystallization cooler and carries out the liquid supplement operation, and the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 For the system structure principle diagram of the system of the utility model freeze technology removes the cation in organic amine.

[0017] Mark explanation: 100, crystallization cooler;101, drive part;102, stirring rod;103, stirring blade;104, serpentine coil pipe;105, liquid level meter;200, freezer unit;300, centrifuge;400, centrifugal pump. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the following will combine the attached drawing of the utility model embodiment and specifically describe the utility model embodiment. Figure 1 The technical scheme of the utility model embodiment is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the described embodiment of the utility model, all other embodiments obtained by the person skilled in the art belong to the scope of the utility model protection.

[0019] As Figure 1The embodiment provides a system for removing cations in organic amine by freezing technology, which comprises a crystallization cooler 100 arranged on a pry bar, a PLC controller arranged on the cooling crystallizer, a liquid inlet of the crystallization cooler 100 being communicated with an outlet of a filtered organic amine solvent temporary storage tank to be treated, sensors for collecting the temperature of the organic solvent and the pressure in the pipeline being arranged on a pipeline communicated with the outlet of the organic amine solvent temporary storage tank to be treated, the sensors being electrically connected with the PLC controller, the PLC controller being a brand of Siemens and a model of S7-1500FCPU, a freezing unit 200 being arranged outside the crystallization cooler 100 and being communicated with the crystallization cooler 100, one end of the freezing unit 200 being connected with a circulating water inlet through an external pipeline, the other end of the freezing unit 200 being connected with a circulating water outlet through an external pipeline, and the freezing unit 200 being connected with the crystallization cooler 100 through an external pipeline, temperature sensors and liquid level sensors being arranged on the crystallization cooler 100, an external pipeline being connected with a raw material inlet on the top of the crystallization cooler 100, an external pipeline being connected with the top of a centrifugal filter on the bottom of the crystallization cooler 100, an external pipeline being connected with one end of a circulating pump on one end of the bottom of the centrifugal filter, an external pipeline being connected with a pipeline of a running device on the other end of the circulating pump, and an outlet of the cooling crystallizer being communicated with a collecting tank, so that the sodium ions in the organic amine liquid can be crystallized before the organic amine liquid enters the collecting tank, the clogging caused by the crystallization of the cations such as sodium ions in the system pipeline, the heat exchanger and the tower plate is avoided, the normal operation of the system is ensured, the working efficiency of the system pipeline, the heat exchanger and the tower plate is greatly improved, the frequency of maintenance and cleaning is reduced, and the operation is more convenient and efficient.

[0020] The upper portion of the crystallization cooler 100 is provided with a driving member 101, the output shaft end of the driving member 101 is provided with a stirring rod 102, the driving member 101 is a servo motor, the output shaft end of the servo motor is provided with a sealing bearing, the inner ring of the sealing bearing is fixedly arranged with the upper portion of the stirring rod 102, the outer ring of the sealing bearing penetrates the top of the cooling crystallizer, the stirring rod 102 penetrates the top of the cooling crystallizer and is rotationally arranged in the inside of the cooling crystallizer, the outside of the stirring rod 102 and in the inside of the cooling crystallizer are provided with stirring blades 103, the inside of the crystallization cooler 100 is further provided with a serpentine coil pipe 104, the serpentine coil pipe 104 is located outside the stirring blades 103, the inlet of the serpentine coil pipe 104 is communicated with the liquid outlet of the freezing unit 200, and the outlet of the serpentine coil pipe 104 is communicated with the inlet of the freezing unit 200.

[0021] This invention utilizes the output shaft of the drive unit 101 to rotate the stirring rod 102 and the stirring blade 103, thereby achieving efficient agitation of the organic amine solvent to be crystallized inside the crystallizer cooler 100. This significantly improves the flow of cations within the cooler. Furthermore, the serpentine coil 104 inside the crystallizer cooler greatly extends the circulation path of the coolant discharged from the outlet of the refrigeration unit 200, further enhancing the efficient cooling of the organic amine solvent inside the crystallizer cooler 100 and improving its crystallization efficiency. Operation is more convenient, solving the problem of sodium sulfate crystallization adhering to system pipes, heat exchangers, and trays, severely impacting normal system operation. Moreover, utilizing the principle of freeze crystallization, sodium sulfate crystals in the organic amine solvent are separated from the liquid phase, achieving solid-liquid separation through a centrifugal filter. During operation, only sodium sulfate crystals are generated; no other wastewater or waste residue is produced. Additionally, the use of PLC control reduces the workload of operators and improves work efficiency.

[0022] According to another embodiment of the present invention, such as Figure 1 The refrigeration unit 200 is also equipped with a circulating coolant inlet and a circulating coolant outlet connected to a coolant storage tank. The bottom of the cooling crystallizer is also equipped with a discharge port, and a centrifuge 300 is connected to the other end of the discharge port. A filter bag is installed inside the centrifuge 300 to collect the crystallized material. A centrifuge pump 400 is installed outside the centrifuge 300, and the outlet of the centrifuge pump 400 is connected to the inlet of the collection pipe.

[0023] This invention enables the storage and circulation of coolant within the refrigeration unit 200 via a coolant storage tank. It allows for replenishment of coolant in the storage tank without shutting down the unit. Furthermore, the centrifugal pump 400, in conjunction with the centrifuge 300, enables the centralized and efficient collection of cations from the amine solution after crystallization in the cooling crystallizer, making operation more convenient.

[0024] The cooling crystallizer is also equipped with a level gauge 105. This utility model can use the level gauge 105 to view the liquid status inside the cooling crystallizer in real time, so as to make it easier to replenish the coolant or liquid to be crystallized in real time and efficiently, making the operation more convenient.

[0025] How to use this utility model:

[0026] Firstly, it needs to be clear that the system for removing the cations in the organic amine related to the utility model is mainly used for pre-concentrated freezing of the cations in the amine liquid, especially sodium ions, before the amine liquid is introduced into the system pipeline, heat exchanger and tower plate, so that the crystallization is precipitated, avoiding the crystallization caused by the direct entry of the amine liquid into the system pipeline, heat exchanger and tower plate, which will cause the blockage of the system pipeline, heat exchanger and tower plate and affect the normal use.

[0027] Secondly, open the valves at the inlet and outlet of the circulating water, start the freezer unit 200, and the cooling liquid flows through the freezer unit 200, and is discharged from the outlet of the freezer unit 200 to the inlet of the serpentine coil 104, and is discharged from the outlet of the serpentine coil 104 to the inlet of the freezer unit 200, thereby realizing the cooling and freezing of the amine liquid in the crystallization cooler 100, and the heat released by the amine liquid is taken away by the circulating water in the crystallization cooler 100. At the same time, the temperature of the crystallization cooler 100 is observed, and when the temperature in the cooler reaches the specified requirement value, the bottom liquid discharge valve of the crystallization cooler 100 is opened, and the frozen organic amine solvent is discharged into the centrifuge 300.

[0028] Finally, start the centrifuge 300, and the crystalline salt is separated from the organic amine solvent under the action of centrifugal force, and the solid-liquid separation is completed. The separated organic amine solvent is sent back to the system by the liquid transfer pump, and the separated crystalline salt is stored in the filter bag in the centrifuge 300.

[0029] After the crystallization is completed, the cover of the centrifuge 300 is opened, and the crystalline salt in the filter bag is transferred out for cleaning.

[0030] The above is a cycle period, and then the appropriate amount of organic amine solvent to be treated is introduced into the crystallization cooler 100, and the cycle operation is continued according to the above process.

[0031] The utility model can realize the crystallization precipitation operation of the cations in the organic amine liquid, especially sodium ions, before entering the system pipeline, heat exchanger and tower plate, by the cooling crystallizer and the freezer unit 200, avoiding the crystallization caused by the cations in the organic amine liquid without crystallization when entering the system pipeline, heat exchanger and tower plate to participate in the internal liquid circulation operation, which greatly reduces the failure frequency of the system pipeline, heat exchanger and tower plate, and improves the service life.

[0032] In addition, it needs to be explained that, in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles described in the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A system for removing cations from organic amines using cryogenic technology, comprising a crystallization cooler (100) disposed on a skid, characterized in that: The inlet of the crystallizer (100) is connected to the outlet of the filtered organic amine solvent storage tank. A refrigeration unit (200) is provided on the outside of the crystallizer (100) and connected thereto. The outlet of the crystallizer is connected to the collection tank.

2. The system for removing cations from organic amines using cryogenic technology as described in claim 1, characterized in that: The upper part of the crystallizer (100) is provided with a driving member (101), and the output shaft end of the driving member (101) is provided with a stirring rod (102). The stirring rod (102) passes through the top of the cooling crystallizer and is rotatably disposed inside the cooling crystallizer. The stirring blade (103) is provided on the outside of the stirring rod (102) and inside the cooling crystallizer.

3. The system for removing cations from organic amines using cryogenic technology as described in claim 2, characterized in that: The crystallizer (100) is also equipped with a serpentine coil (104) inside. The serpentine coil (104) is located outside the stirring blade (103). The inlet of the serpentine coil (104) is connected to the liquid outlet of the refrigeration unit (200), and the outlet of the serpentine coil (104) is connected to the inlet of the refrigeration unit (200).

4. The system for removing cations from organic amines using cryogenic technology as described in claim 3, characterized in that: The refrigeration unit (200) is also equipped with a circulating coolant inlet and a circulating coolant outlet connected to the coolant storage tank.

5. The system for removing cations from organic amines using cryogenic technology as described in claim 4, characterized in that: The bottom of the cooling crystallizer is also provided with a discharge port, and a centrifuge (300) connected to the other end of the discharge port is provided. A centrifugal pump (400) is provided on the outside of the centrifuge (300), and the outlet of the centrifugal pump (400) is connected to the inlet of the collection pipe.

6. The system for removing cations from organic amines using cryogenic technology as described in claim 5, characterized in that: The cooling crystallizer is also equipped with a level gauge (105).

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