CN217248844U - Urea hydrolysis device and control system of online deironing - Google Patents
Urea hydrolysis device and control system of online deironing Download PDFInfo
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- CN217248844U CN217248844U CN202220620437.5U CN202220620437U CN217248844U CN 217248844 U CN217248844 U CN 217248844U CN 202220620437 U CN202220620437 U CN 202220620437U CN 217248844 U CN217248844 U CN 217248844U
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Abstract
The utility model provides a urea hydrolysis unit and control system of online deironing, urea hydrolysis unit includes urea hydrolysising device and de-ironing separator, the bottom sewage pipes of urea hydrolysising device with the entry of de-ironing separator is linked together, the export of de-ironing separator pass through connecting tube with the liquid level sewage pipes of urea hydrolysising device is linked together, be equipped with the solution circulating pump on the connecting tube. The utility model discloses can be under the prerequisite that does not influence urea normal operating of hydrolysising, the iron impurity that contains in the urea solution is detached in the on-line filtration.
Description
Technical Field
The utility model relates to a urea hydrolysis ammonia process technology field especially relates to a urea hydrolysis device and control system of online deironing.
Background
In the existing urea hydrolysis ammonia production process, urea particles are added into a dissolving tank to be dissolved into a urea solution with the mass concentration of 50%, the urea solution is conveyed into a urea hydrolyzer, and urea in a hydrolysis reactor is hydrolyzed to generate ammonia gas, water and carbon dioxide under the action of steam with the pressure of 0.8Mpa and the temperature of below 180 ℃. And the product enters an SCR denitration system through pressure reduction and flow control. Wherein the chemical equation of the hydrolysis reaction is as follows: CO (NH) 2 ) 2 +H 2 O＝CO 2 ↑+2NH 3 ↑。
Since the production process of urea requires iron as a catalyst, the urea solution generally contains trace iron element in industrial use. Therefore, after the existing urea hydrolyzer runs for a long time, the iron content in the urea solution in the urea hydrolyzer gradually rises, and a layer of dark red iron oxide film is formed and attached to the pipe wall of the urea hydrolyzer, so that the heat exchange efficiency and the service life of equipment are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a urea hydrolysis device of online deironing to the problem that the iron oxide film influences heat transfer performance when urea hydrolyzer moves for a long time among the prior art on the inside pipe wall.
The utility model discloses a urea hydrolysis control system based on urea hydrolysis device is provided to another purpose.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
the urea hydrolysis device comprises a urea hydrolyzer and an iron remover, wherein a bottom sewage discharge pipeline of the urea hydrolyzer is communicated with an inlet of the iron remover, an outlet of the iron remover is communicated with a liquid level sewage discharge pipeline of the urea hydrolyzer through a connecting pipeline, and a solution circulating pump is arranged on the connecting pipeline.
In the technical scheme, the bottom sewage discharge pipeline of the urea hydrolyzer is communicated with the inlet through a first conveying pipeline, a first valve is arranged on the bottom sewage discharge pipeline, an inlet door is arranged on the first conveying pipeline, the bottom sewage discharge pipeline is connected with a back flushing port of the iron remover through a second conveying pipeline, a back flushing door is arranged on the second conveying pipeline, the sewage discharge port of the iron remover is connected with a sewage discharge pipeline, a sewage discharge door is arranged on the sewage discharge pipeline, an outlet door is arranged on the connecting pipeline, and a second valve is arranged on the liquid level sewage discharge pipeline.
In the technical scheme, the inlet of the iron remover is arranged at the bottom of the iron remover, the outlet of the iron remover is arranged at the upper part of the iron remover, and the inlet and the outlet are arranged at two opposite sides of the iron remover.
In the technical scheme, the back washing port of the iron remover is arranged at the upper part of the iron remover, the sewage discharge port is arranged at the bottom of the iron remover, and the back washing port and the sewage discharge port are arranged at two opposite sides of the iron remover.
In the above technical scheme, the liquid level sewage pipeline is connected with a first output pipeline, the first output pipeline is connected with a first output valve, the bottom sewage pipeline is connected with a second output pipeline, the second output pipeline is provided with a second output valve, and pipeline outlets of the first output pipeline and the second output pipeline are connected to a discharge pipeline.
In the above technical scheme, set up the medicine mouth on the de-ironing separator, the pump export of solution circulating pump is linked together with the chemical cleaning pipeline, the chemical cleaning pipeline with the solution inlet pipe of urea hydrolyser is connected, be equipped with the chemical cleaning door on the chemical cleaning pipeline, be equipped with the inlet valve on the solution inlet pipe.
In the above technical scheme, the connecting pipeline includes a first pipeline section and a second pipeline section which are communicated with each other, the first pipeline section is connected to the outlet, the first pipeline section is provided with the solution circulating pump, the inlet and outlet sides of the pump of the solution circulating pump are respectively provided with an inlet side valve and an outlet side valve, the second pipeline section is communicated with the liquid level sewage pipeline, the second pipeline section is provided with the outlet door, and the pipeline outlet of the first pipeline section is connected to the solution inlet pipeline through a chemical cleaning pipeline.
In the above technical scheme, the solution inlet pipeline is communicated with the urea solution pipeline.
The utility model discloses an on the other hand, a urea of online deironing control system that hydrolysises, include the urea of online deironing hydrolyze device and the control unit, the position of entry is equipped with the entry manometer, the position of export is equipped with the export manometer, entry manometer, export manometer and the de-ironing separator is connected with the control unit communication respectively.
In the above technical scheme, the de-ironing separator is an electromagnetic de-ironing device, a magnetic filter element is arranged in the electromagnetic de-ironing device, the magnetic filter element comprises an excitation coil and a magnetic conduction base body, and the electromagnetic de-ironing device is in communication connection with the control unit.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses an outer hanging de-ironing separator can be under the prerequisite that does not influence urea normal operating of hydrolysising, and the iron impurity that contains in the urea solution is detached in the on-line filtration, effectively avoids the inside oxide scale deposit that forms iron of hydrolysising ware. Can improve the working efficiency and the equipment safety, and has great popularization value.
2. The iron is removed by the principle of electromagnetic induction, iron impurities fall off after the electromagnetic coil is powered off, the back washing effect is obvious, and the trouble of frequently replacing the filter screen in the later period is avoided. And the arrangement of the back washing and sewage discharging functions reduces the later maintenance cost.
3. The urea hydrolysis system with the dosing function can be used for chemically cleaning the urea hydrolyzer through the iron remover after the urea hydrolyzer is decomposed, so that the problems of maintenance and repair of the urea hydrolyzer are solved, and the service life of equipment is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-a urea hydrolyzer, 2-an iron remover, 3-a bottom sewage discharge pipeline, 4-an inlet valve, 5-a solution circulating pump, 6-an outlet side valve, 7-an inlet, 8-an outlet, 9-a steam delivery pipeline, 10-a water delivery pipeline, 11-an inlet side valve, 12-a first delivery pipeline, 13-a second delivery pipeline, 14-a back flushing port, 15-a sewage discharge port, 16-a sewage discharge pipeline, 17-a first valve, 18-an inlet door, 19-an outlet door, 20-a liquid surface sewage discharge pipeline, 21-a second valve, 22-a back flushing door, 23-a sewage discharge door, 24-a first output pipeline, 25-a first output valve, 26-a second output pipeline, 27-a second output valve and 28-a discharge pipeline, 29-a dosing port, 30-a chemical cleaning pipeline, 31-a solution inlet pipeline, 32-a chemical cleaning door, 33-a urea solution pipeline, 34-a first pipe section and 35-a second pipe section.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The utility model provides a urea hydrolysis device of online deironing, includes urea hydrolysising device 1 and de-ironing separator 2, the bottom sewage pipes 3 of urea hydrolysising device 1 with the entry 7 of de-ironing separator 2 is linked together, the export 8 of de-ironing separator 2 through connecting tube with the liquid level sewage pipes 20 of urea hydrolysising device 1 is linked together, the last solution circulating pump 5 that is equipped with of connecting tube.
The liquid level sewage pipe 20 is connected to the middle part of the urea hydrolyzer 1, the bottom sewage pipe 3 is connected to the bottom of the urea hydrolyzer 1, when the urea hydrolyzer of this embodiment operates, the solution circulating pump 5 conveys the urea solution to the inlet 7 of the iron remover 2 through the bottom sewage pipe 3 of the urea hydrolyzer 1, and the solution after iron removal by the iron remover 2 returns to the urea hydrolyzer 1 through the liquid level sewage pipe 20 of the urea hydrolyzer 1. Thereby achieving the effect of removing iron from the urea solution on line. The urea hydrolyzer 1 is connected with a steam conveying pipeline 9 and a water conveying pipeline 10, and urea solution generates hydrolysis reaction in the urea hydrolyzer 1 under the action of steam of 0.8Mpa and below 180 ℃.
Example 2
In order to facilitate the back washing of the urea hydrolyzer 1, the bottom sewage discharge pipeline 3 of the urea hydrolyzer 1 is communicated with the inlet 7 through a first conveying pipeline 12, a first valve 17 is arranged on the bottom sewage discharge pipeline 3, an inlet door 18 is arranged on the first conveying pipeline 12, the bottom sewage discharge pipeline 3 is connected with the back washing port 14 of the iron remover 2 through a second conveying pipeline 13, a back washing door 22 is arranged on the second conveying pipeline 13, the sewage discharge port 15 of the iron remover 2 is connected with a sewage discharge pipeline 16, a sewage discharge door 23 is arranged on the sewage discharge pipeline 16, an outlet door 19 is arranged on the connecting pipeline, and a second valve 21 (two second valves 21 are arranged in the figure) is arranged on the liquid level sewage discharge pipeline 20.
When the urea hydrolysis device operates, the first valve 17, the inlet door 18, the outlet door 19 and the second valve 21 are opened, the back flush door 22 and the sewage discharge door 23 are closed, urea solution in the urea hydrolyzer 1 enters the iron remover 2 through the bottom sewage discharge pipeline 3 and the first conveying pipeline 12, after iron oxides are removed in the iron remover 2, the urea solution is conveyed into the urea hydrolyzer 1 through the connecting pipeline and the liquid surface sewage discharge pipeline 20, during back flushing, the inlet door 18, the outlet door 19 and the second valve 21 are closed, the first valve 17, the back flush door 22 and the sewage discharge door 23 are opened, the urea solution is conveyed to the back flush port 14 of the iron remover 2 through the bottom sewage discharge pipeline 3 of the urea hydrolyzer 1, and iron oxides in the iron remover 2 are flushed out by back flushing and are discharged through the sewage discharge pipeline 16.
Preferably, the entry 7 of de-ironing separator 2 sets up the bottom of de-ironing separator 2, the export 8 of de-ironing separator 2 sets up the upper portion of de-ironing separator 2, entry 7 with export 8 sets up the relative both sides of de-ironing separator 2, and the urea solution that contains the trace iron element is followed in de-ironing separator 2's bottom enters into de-ironing separator 2, behind the iron element was got rid of to the inside deironing mechanism of de-ironing separator 2, the urea solution was followed the upper portion of de-ironing separator 2 is discharged.
The back flush 14 of de-ironing separator 2 sets up the upper portion of de-ironing separator 2, drain 15 sets up the bottom of de-ironing separator 2, back flush 14 sets up with drain 15 the relative both sides of de-ironing separator 2, and urea solution follows in the top of de-ironing separator 2 enters into de-ironing separator 2, washes de-ironing separator 2, and the foul solution that washes the production is followed the bottom of de-ironing separator 2 is discharged.
Preferably, the liquid level sewage pipe 20 is connected to a first output pipeline 24, the first output pipeline 24 is connected to a first output valve 25, the bottom sewage pipe 3 is connected to a second output pipeline 26, the second output pipeline 26 is provided with a second output valve 27, and the pipeline outlets of the first output pipeline 24 and the second output pipeline 26 are both connected to a discharge pipeline 28. When the sewage is discharged through the liquid level, the second valve 21 and the first output valve 25 are opened, the sewage is discharged through the liquid level sewage discharge pipeline 20 and the first output pipeline 24, and when the sewage is discharged through the bottom, the first valve 17 and the second output valve 27 are opened, and the sewage is discharged through the bottom sewage discharge pipeline 3 and the second output pipeline 26.
Example 3
In order to optimize the dosing function of the urea hydrolyzer 1, the present embodiment is modified from embodiment 1 or embodiment 2.
The top of de-ironing separator 2 sets up with medicine mouth 29, the pump of solution circulating pump 5 mouth is linked together with chemical cleaning pipeline 30, chemical cleaning pipeline 30 with the solution inlet pipe 31 of urea hydrolyser 1 is connected, be equipped with chemical cleaning door 32 on the chemical cleaning pipeline 30, be equipped with inlet valve 4 on the solution inlet pipe 31.
The iron remover 2 is reserved with a dosing port 29, before chemical washing is carried out after the urea hydrolyzer 1 is split, an inlet door 18 and an outlet door 19 of the iron remover 2 are closed, partial solution in the iron remover 2 is discharged through a sewage discharge door 23, a space is reserved for adding the reagent, the inlet door 18 of the iron remover 2 is opened after dosing, the outlet door 19 is closed, a first valve 17, an inlet valve 4 and a chemical cleaning door 32 are opened, a solution circulating pump 5 is started, the urea solution is sucked into the iron remover 2 from a sewage discharge pipeline 3 and a first conveying pipeline 12 at the bottom of the hydrolyzer and mixed with the cleaning reagent, and the solution circulating pump 5 pumps the urea solution mixed with the cleaning reagent into a chemical cleaning pipeline 30 and returns the solution inlet pipeline 31 to the urea hydrolyzer 1, so that the function of chemical washing of the urea hydrolyzer 1 is realized.
Preferably, the connecting pipeline includes a first pipe section 34 and a second pipe section 35 which are communicated with each other, the first pipe section 34 is connected to the outlet 8, the solution circulating pump 5 is arranged on the first pipe section 34, an inlet side valve 11 and an outlet side valve 6 are respectively arranged on the pump inlet and outlet sides of the solution circulating pump 5, the second pipe section 35 is communicated with the liquid level sewage pipe 20, the outlet door 19 is arranged on the second pipe section 35, and the pipeline outlet of the first pipe section 34 is connected to the solution inlet pipe 31 through a chemical cleaning pipeline 30. When chemical washing is carried out, the first valve 17, the inlet valve 18, the inlet side valve 11, the outlet side valve 6, the chemical cleaning door 32 and the inlet valve 4 are opened, other valves are closed, the solution circulating pump 5 is started, urea solution is sucked into the iron remover 2 from the bottom sewage discharge pipeline 3 of the hydrolyzer and is mixed with cleaning agents, and then the urea solution returns to the urea hydrolyzer 1 through the first pipe section 34, the chemical cleaning pipeline 30 and the solution inlet pipeline 31.
Preferably, the solution inlet pipe 31 is communicated with a urea solution pipe 33, when the urea hydrolysis device is operated, the chemical cleaning door 32 is closed, the inlet valve 4 is opened, and the urea solution enters the urea hydrolyzer 1 through the urea solution pipe 33 and the solution inlet pipe 31.
Example 4
The embodiment is an online iron-removing urea hydrolysis control system, which comprises the iron-removing urea hydrolysis device in the embodiment 1, 2 or 3.
In order to realize automatic back flushing, the position of entry 7 is equipped with the entry manometer, the position of export 8 is equipped with the export manometer, entry manometer, export manometer and de-ironing separator 2 is connected with the control unit communication respectively, the pressure of entry 7 department can real-time supervision by the entry manometer, the pressure of export 8 departments can real-time supervision by the export manometer to transmit pressure signal to the control unit, monitor when the control unit that import and export 8 pressure differential reaches the alarm value after, the magnetic filter core outage of de-ironing separator 2, shut off solution circulating pump 5, close deironing device's import door 18, export door 19, open back flush door 22 and blowdown door 23, discharge impurity, realize automatic back flushing.
The deironing device 2 is an electromagnetic deironing device, a magnetic filter element is arranged in the electromagnetic deironing device, and the magnetic filter element comprises an excitation coil and a magnetic conduction base body. When the excitation coil is electrified, the directional magnetic field generated by the excitation coil magnetizes the magnetic substance in the water by the magnetic conduction substrate to adsorb impurities on the surface of the magnetic conduction substrate, so that the solution is purified, the oxide of iron with the thickness of 0.03-150 mu m is removed, the practical application of iron removal of the urea hydrolyzer 1 is further attached, during back washing, the power supply of the excitation coil is turned off, the iron impurities fall off after the electromagnetic coil is electrified, and the back washing operation is carried out. More preferably, the magnetic filter element is a gradient magnetic filter element and is made of a special stainless steel material, the magnetic filter element has the advantages of corrosion resistance and abrasion resistance, and the arrangement of the filter elements is from sparse to dense, so that the backwashing effect is good.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, and do not necessarily require or imply any actual relationship or order between such elements.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The urea hydrolysis device capable of removing iron on line is characterized by comprising a urea hydrolyzer and an iron remover, wherein a bottom sewage discharge pipeline of the urea hydrolyzer is communicated with an inlet of the iron remover, an outlet of the iron remover is communicated with a liquid level sewage discharge pipeline of the urea hydrolyzer through a connecting pipeline, and a solution circulating pump is arranged on the connecting pipeline.
2. The urea hydrolysis device for removing iron online as recited in claim 1, wherein a bottom drain line of said urea hydrolysis device is connected to said inlet via a first pipeline, said bottom drain line is provided with a first valve, said first pipeline is provided with an inlet gate, said bottom drain line is connected to a back flush port of said iron remover via a second pipeline, said second pipeline is provided with a back flush gate, said drain port of said iron remover is connected to a drain pipe, said drain pipe is provided with a drain gate, said connecting pipeline is provided with an outlet gate, and said liquid level drain pipe is provided with a second valve.
3. The urea hydrolysis device with on-line iron removal according to claim 1, wherein an inlet of the iron remover is disposed at a bottom of the iron remover, an outlet of the iron remover is disposed at an upper portion of the iron remover, and the inlet and the outlet are disposed at opposite sides of the iron remover.
4. The urea hydrolysis device for removing iron online as recited in claim 2, wherein the back flush port of the iron remover is disposed at the upper portion of the iron remover, the sewage outlet is disposed at the bottom of the iron remover, and the back flush port and the sewage outlet are disposed at opposite sides of the iron remover.
5. The urea hydrolysis device with on-line iron removal according to claim 1, wherein the liquid surface sewage conduit is connected to a first output pipeline, a first output valve is connected to the first output pipeline, the bottom sewage conduit is connected to a second output pipeline, a second output valve is arranged on the second output pipeline, and the pipeline outlets of the first output pipeline and the second output pipeline are connected to a discharge pipeline.
6. The urea hydrolysis device with on-line iron removal as claimed in claim 2, wherein the iron remover is provided with a chemical feeding port, an outlet of the solution circulating pump is communicated with a chemical cleaning pipeline, the chemical cleaning pipeline is connected with a solution inlet pipeline of the urea hydrolyzer, the chemical cleaning pipeline is provided with a chemical cleaning door, and the solution inlet pipeline is provided with an inlet valve.
7. The urea hydrolysis device with on-line iron removal according to claim 6, wherein the connection pipeline comprises a first pipeline section and a second pipeline section which are communicated with each other, the first pipeline section is connected to the outlet, the first pipeline section is provided with the solution circulating pump, the inlet and outlet sides of the solution circulating pump are respectively provided with an inlet side valve and an outlet side valve, the second pipeline section is communicated with the liquid level sewage pipe, the second pipeline section is provided with the outlet door, and the pipeline outlet of the first pipeline section is connected to the solution inlet pipe through a chemical cleaning pipeline.
8. The urea hydrolysis apparatus with on-line iron removal according to claim 7, wherein the solution inlet pipe is in communication with the urea solution pipe.
9. The urea hydrolysis control system for online iron removal is characterized by comprising the urea hydrolysis device for online iron removal and a control unit according to any one of claims 1 to 8, wherein an inlet pressure gauge is arranged at the position of an inlet of the iron remover, an outlet pressure gauge is arranged at the position of an outlet of the iron remover, and the inlet pressure gauge, the outlet pressure gauge and the iron remover are respectively in communication connection with the control unit.
10. The system of claim 9, wherein the deironing device is an electromagnetic deironing device, a magnetic filter is disposed in the electromagnetic deironing device, the magnetic filter comprises an excitation coil and a magnetic conductive base, and the electromagnetic deironing device is in communication with the control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220620437.5U CN217248844U (en) | 2022-03-18 | 2022-03-18 | Urea hydrolysis device and control system of online deironing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220620437.5U CN217248844U (en) | 2022-03-18 | 2022-03-18 | Urea hydrolysis device and control system of online deironing |
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| Publication Number | Publication Date |
|---|---|
| CN217248844U true CN217248844U (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220620437.5U Active CN217248844U (en) | 2022-03-18 | 2022-03-18 | Urea hydrolysis device and control system of online deironing |
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| CN (1) | CN217248844U (en) |
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