CN111992033A - Waste liquid recovery device of urea hydrolysis reactor - Google Patents
Waste liquid recovery device of urea hydrolysis reactor Download PDFInfo
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- CN111992033A CN111992033A CN202010965426.6A CN202010965426A CN111992033A CN 111992033 A CN111992033 A CN 111992033A CN 202010965426 A CN202010965426 A CN 202010965426A CN 111992033 A CN111992033 A CN 111992033A
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- waste liquid
- pipeline
- liquid recovery
- demineralized water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/08—Preparation of ammonia from nitrogenous organic substances
- C01C1/086—Preparation of ammonia from nitrogenous organic substances from urea
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Abstract
The invention relates to the technical field of chemical material preparation, in particular to a waste liquid recovery device of a urea hydrolysis reactor, which comprises: a waste liquid recovery tank; one end of the waste liquid blow-down pipeline is suitable for being communicated with a waste liquid blow-down port of the hydrolyzer, and the other end of the waste liquid blow-down pipeline is arranged in the waste liquid recovery box; one end of the filtering pipeline is arranged in the waste liquid recovery box, the other end of the filtering pipeline is suitable for being communicated with the urea solution inlet of the hydrolyzer, and the filtering pipeline is sequentially provided with a first automatic valve, a Y-shaped filter, a Lanshi filter, a high-pressure pump, a pressure gauge and a check valve; the demineralized water pipeline, one end setting is in the waste liquid recovery case, and one end is suitable for and links to each other with the demineralized water interface, and the last position department that is close to the waste liquid recovery case of demineralized water pipeline is equipped with first demineralized water automatic valve, and the position department that is close to the demineralized water interface is equipped with second demineralized water automatic valve. The setting of filtration pipeline can enough avoid urea solution and catalyst solution extravagant, practice thrift the cost, can play the effect of environmental protection again.
Description
Technical Field
The invention relates to the technical field of chemical material preparation, in particular to a waste liquid recovery device of a urea hydrolysis reactor.
Background
The main power supply in China is coal-fired thermal power generation, nitrogen oxide NOx generated by coal is a main pollutant causing haze and acid rain, the main means for controlling NOx emission is flue gas denitration, Selective Catalytic Reduction (SCR) is the highest in efficiency in a plurality of flue gas denitration processes, and is also the most mature method in technology and process2And H2O。
The reducing agent used for SCR flue gas denitration is ammonia fundamentally, and a set of device capable of continuously producing ammonia needs to be arranged on site. From the raw material point of view, the ammonia gas preparation system can be divided into an anhydrous liquid ammonia system, an ammonia water system and a urea system. The system for preparing ammonia gas by evaporating liquid ammonia is the most common system because the investment is the cheapest and the transportation and use costs are the lowest, but the liquid ammonia system has great potential safety hazard, particularly the transportation and storage processes of the system have great harm caused by liquid ammonia leakage and frequent safety accidents; the investment, operation and transportation costs of the ammonia water system are high, and the ammonia water system is safer than liquid ammonia, but still has certain potential safety hazards; the investment and operation costs of the urea system are higher than those of the liquid ammonia system, but the transportation cost is equivalent, and the urea system basically has no potential safety hazard and is the safest ammonia preparation technology.
The waste liquid in the urea hydrolysis technology applied commercially at present is directly discharged to a trench, urea solution and catalyst solution are wasted, and the operation cost is increased.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect that the urea solution and the catalyst solution are wasted due to the fact that the blowdown liquid of the urea hydrolysis reactor in the prior art is directly discharged to the trench, so as to provide a waste liquid recovery device of the urea hydrolysis reactor, which can avoid the waste of the urea solution and the catalyst solution.
In order to solve the above technical problems, the present invention provides a waste liquid recovery apparatus for a urea hydrolysis reactor, comprising:
a waste liquid recovery tank;
one end of the waste liquid blow-down pipeline is suitable for being communicated with a waste liquid blow-down port of the hydrolyzer, and the other end of the waste liquid blow-down pipeline is arranged in the waste liquid recovery box;
one end of the filtering pipeline is arranged in the waste liquid recovery box, the other end of the filtering pipeline is suitable for being communicated with a urea solution inlet of the hydrolyzer, and a first automatic valve, a Y-shaped filter, a Lanshi filter, a high-pressure pump, a pressure gauge and a check valve are sequentially arranged on the filtering pipeline;
demineralized water pipeline, one end sets up in the waste liquid recovery case, one end is suitable for and links to each other with the demineralized water interface, be close to on the demineralized water pipeline waste liquid recovery case's position department is equipped with first demineralized water automatic valve, is close to the position department of demineralized water interface is equipped with second demineralized water automatic valve.
The waste liquid recovery box is internally provided with a desalted water solution in advance, and one end of the waste liquid sewage discharge pipeline is arranged below the liquid level of the desalted water solution.
The waste liquid recovery box is internally provided with a spray pipe, the spray pipe is provided with a plurality of spray heads, and the spray pipe is communicated with one end of the demineralized water pipeline.
The waste liquid recovery incasement is equipped with at least one teletransmission magnetism and turns over the board level gauge, waste liquid recovery unit still includes control system, control system is used for teletransmission magnetism turns over the board level gauge and detects when the liquid level in the waste liquid recovery incasement reaches 50%, control first automatic valve is opened.
And the outside of the waste liquid recovery box is provided with a heat insulation layer and electric tracing for keeping the temperature in the waste liquid recovery box between 50 ℃ and 80 ℃.
The bottom of waste liquid recovery case is equipped with first pipeline and blowdown trench intercommunication, be equipped with first manual valve on the first pipeline.
The desalting water pipeline is connected with the filtering pipeline through a connecting pipeline, a second automatic valve is arranged on the connecting pipeline, the connecting pipeline is connected with the desalting water pipeline through a connecting point between a first desalting water automatic valve and the second desalting water automatic valve, the connecting pipeline is connected with the filtering pipeline through a connecting point between the first automatic valve and the Y-type filter, the connecting pipeline is communicated with the filtering pipeline through a second pipeline and the first pipeline between the Y-type filter, a second manual valve is arranged on the first pipeline, the downstream position of the check valve is communicated with the first pipeline through a third pipeline, and a third manual valve is arranged on the third pipeline.
The position that the waste liquid recovery case is close to the top still is equipped with the fourth pipeline, the fourth pipeline with first pipeline is linked together, just the second pipeline with the tie point of first pipeline is located the downstream position of first manual valve.
The technical scheme of the invention has the following advantages:
1. according to the waste liquid recovery device of the urea hydrolysis reactor, the waste liquid of the hydrolysis reactor can be discharged into the waste liquid recovery box through the waste liquid sewage discharge pipeline, the desalted water pipeline can convey desalted water into the waste liquid recovery box and absorb ammonia gas volatilized by the waste liquid recovery box, the waste liquid can be returned into the hydrolyzer for continuous use after being subjected to double filtration through the filtering pipeline, waste of urea solution and catalyst solution can be avoided, the cost is saved, and the effect of protecting the environment can be achieved.
2. According to the waste liquid recovery device of the urea hydrolysis reactor, the waste liquid recovery box is internally provided with the desalted water solution in advance, and one end of the waste liquid blow-off pipeline is arranged below the liquid level of the desalted water solution, so that gas mixed in the waste liquid can be prevented from being discharged into the air.
3. According to the waste liquid recovery device of the urea hydrolysis reactor, provided by the invention, the spray pipe is arranged in the waste liquid recovery box, the spray pipe is provided with the plurality of spray heads, the spray pipe is communicated with one end of the desalted water pipeline, and the spray heads spray water into the waste liquid recovery box, so that volatilized ammonia gas can be absorbed, and the ammonia gas in the waste liquid is prevented from volatilizing.
4. According to the waste liquid recovery device of the urea hydrolysis reactor, the heat-insulating layer and the electric tracing heat are arranged outside the waste liquid recovery box, so that the temperature in the waste liquid recovery box is kept between 50 ℃ and 80 ℃, and the crystallization of the solution in the waste liquid recovery box can be prevented.
5. In the waste liquid recovery device for a urea hydrolysis reactor, the demineralized water pipeline is connected with the filtering pipeline through a connecting pipeline, the connecting pipeline is provided with a second automatic valve, the connecting point of the connecting pipeline and the demineralized water pipeline is positioned between the first automatic valve and the second automatic valve, the connecting point of the connecting pipeline and the filtering pipeline is positioned between the first automatic valve and the Y-shaped filter, the connecting point of the connecting pipeline and the filtering pipeline is communicated with the first pipeline through a second pipeline, the first pipeline is provided with a second manual valve, the downstream position of the check valve is communicated with the first pipeline through a third pipeline, the third pipeline is provided with a third manual valve, so that the filtering pipeline can be cleaned, and after cleaning, the cleaning solution flows into the sewage drainage trench through the second pipeline and the third pipeline.
6. According to the waste liquid recovery device of the urea hydrolysis reactor, the position, close to the top end, of the waste liquid recovery box is further provided with the fourth pipeline, the fourth pipeline is communicated with the first pipeline, and the connecting point of the second pipeline and the first pipeline is located at the downstream position of the first manual valve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a waste liquid recovery apparatus of a urea hydrolysis reactor according to an embodiment of the present invention.
Description of reference numerals:
1-a waste liquid recovery tank; 2-a waste liquid drain outlet of the hydrolyzer; 3-a demineralized water interface; 4-a urea solution inlet of the hydrolyzer; 5-sewage draining trench; 6-a safe vent; 7-insulating layer; 8-a spray pipe; 9-a spray head; 10-waste liquid blowdown pipeline; 11-first demineralized water automatic valve; 12-second demineralized water automatic valve; 13-a first automatic valve; 14-a second automatic valve; a 15-Y strainer; 16-a blue filter; 17-a high pressure pump; 18-a first manual valve; 19-a second manual valve; 20-a third manual valve; 21-a check valve; 22-a fourth manual valve; t1-thermal resistance; l1-remote transmission magnetic flap level gauge; p1-pressure gauge; b-a filtration line; c-a demineralized water conduit; d-a first conduit; e-a second conduit; f-a third pipeline; g-a fourth pipeline; h-connecting the pipeline.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
The present example provides a specific embodiment of the waste liquid recovery device of the urea hydrolysis reactor, and in this embodiment, as shown in fig. 1, the waste liquid recovery device comprises a waste liquid recovery tank 1, a waste liquid blowdown pipeline 10, a filtering pipeline B, and a demineralized water pipeline C.
The top of the waste liquid recovery box 1 is provided with a safe vent 6 through a pipeline.
Wherein one end of the waste liquid blow-off pipeline 10 is suitable for being communicated with the waste liquid blow-off port 2 of the hydrolyzer, and the other end is arranged in the waste liquid recovery tank 1; one end of the filtering pipeline B is arranged in the waste liquid recovery box 1, one end of the filtering pipeline B is suitable for being communicated with the urea solution inlet 4 of the hydrolyzer, and the filtering pipeline B is sequentially provided with a first automatic valve 13, a Y-shaped filter 15, a Lanshi filter 16, a high-pressure pump 17, a pressure gauge P1, a check valve 21 and a fourth manual valve 22 according to the flowing direction of liquid; the one end setting of demineralized water pipeline C is in waste liquid recovery case 1, and one end is suitable for and links to each other with demineralized water interface 3, and the last position department that is close to waste liquid recovery case 1 of demineralized water pipeline C is equipped with first demineralized water automatic valve 11, and the position department that is close to demineralized water interface 3 is equipped with second demineralized water automatic valve 12.
The waste liquid recovery device that this embodiment provided can discharge the waste liquid of hydrolysis reactor in waste liquid collection box 1 through waste liquid sewage pipes 10, and demineralized water pipeline C can be to carrying demineralized water in waste liquid collection box 1, absorbs the ammonia that waste liquid collection box 1 volatilizees, and filter tube B can make the waste liquid go back to the hydrolyzer again after double filtration and continue to use, can enough avoid urea solution and catalyst solution extravagant, practice thrift the cost, can play the effect of environmental protection again.
In addition to the above embodiments, in a preferred embodiment, the waste liquid recovery tank 1 is provided with a desalted water solution in advance, and one end of the waste liquid drain pipe 10 is disposed below the liquid level of the desalted water solution, so that the gas included in the waste liquid can be prevented from being discharged to the air.
On the basis of the above embodiment, in a preferred embodiment, the shower 8 is arranged in the waste liquid recovery tank 1, specifically, the shower 8 is horizontally arranged, the shower 8 is provided with a plurality of spray heads 9, the shower 8 is communicated with one end of the demineralized water pipeline C, and the spray heads 9 spray water into the waste liquid recovery tank 1, so that volatilized ammonia gas can be absorbed, and volatilization of ammonia gas in the waste liquid is prevented.
On the basis of the above embodiment, in a preferred embodiment, at least one remote transmission magnetic flap level meter L1 is arranged in the waste liquid recovery tank 1, and the waste liquid recovery device further comprises a control system, wherein the control system is configured to control the first automatic valve 13 to open when the remote transmission magnetic flap level meter L1 detects that the liquid level in the waste liquid recovery tank 1 reaches 50%. Specifically, assuming that the height of the waste liquid recovery tank 1 is H, the controller controls the first automatic valve 13 to open when the liquid level in the waste liquid recovery tank 1 reaches 50% H.
On the basis of the above embodiment, in a preferred embodiment, the outside of the waste liquid recovery box 1 is provided with the heat preservation layer 7 and the electric tracing, the heat preservation layer 7 is used for preserving heat and is matched with the electric tracing to be used for keeping the temperature in the waste liquid recovery box 1 between 50 ℃ and 80 ℃, and the waste liquid recovery box 1 is connected with at least one thermal resistor T1 for measuring the temperature, so that the crystallization of the solution in the waste liquid recovery box 1 can be prevented.
In addition to the above embodiments, in a preferred embodiment, the waste liquid recovery tank 1 is provided with a first pipe D at the bottom thereof to communicate with the sewage drain 5, and the first pipe D is provided with a first manual valve 18. When the waste liquid recovery tank 1 is not in use, the liquid in the waste liquid recovery tank 1 can be discharged through the first pipe D.
In addition to the above embodiments, in a preferred embodiment, the demineralized water line C is connected to the filtering line B through a connecting line H, the second automatic valve 14 is provided on the connecting line H, a connection point of the connecting line H and the demineralized water line C is located between the first demineralized water automatic valve 11 and the second demineralized water automatic valve 12, a connection point of the connecting line H and the filtering line B is located between the first automatic valve 13 and the Y-type filter 15, a connection point of the connecting line H and the filtering line B is communicated with the first line D through a second line E, the first line D is provided with a second manual valve 19, a downstream position of the check valve 21 is communicated with the first line D through a third line F, and the third line F is provided with a third manual valve 20. The filter pipeline B can be cleaned by the arrangement, and cleaning liquid flows into the sewage drainage trench 5 through the second pipeline E and the third pipeline F after cleaning.
In addition to the above-described embodiments, in a preferred embodiment, a fourth pipe G is further provided at a position near the top end of the waste liquid recovery tank 1, the fourth pipe G communicates with the first pipe D, and a connection point of the second pipe E and the first pipe D is located downstream of the first manual valve 18. Set up like this and make when the liquid level in waste liquid recovery case 1 is too high, the waste liquid can flow into the trench through fourth pipeline G, can avoid the liquid in waste liquid recovery case 1 to spill over and influence the environment.
The waste liquid recovery device that this embodiment provided, when hydrolyzer waste liquid drain 2 began to discharge the waste liquid, control first demineralized water automatic valve 11, the automatic valve 12 of second demineralized water is automatic to be opened, and shower nozzle 9 on the shower 8 begins to spray to avoid the waste liquid to volatilize at the in-process ammonia that gets into waste liquid recovery device. When the sewage discharge is finished, the first automatic valve 13 is opened, the waste liquid is filtered by the Y-shaped filter 15 and the blue-tooth filter 16 respectively, and the filtrate is pumped back to the hydrolyzer by the high-pressure pump 17 and the check valve 21.
Further, when the waste liquid recovery tank 1 is used up and then cleaning is required, the fourth manual valve 22 is closed, the first demineralized water automatic valve 11, the second demineralized water automatic valve 12, the first automatic valve 13, the second automatic valve 14, the first manual valve 18, the second manual valve 19, the third manual valve 20, and the check valve 21 are opened, the entire apparatus is cleaned, and the cleaning liquid after cleaning is flowed into the sewage drain 5.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (8)
1. The utility model provides a urea hydrolysis reactor's waste liquid recovery unit which characterized in that includes:
a waste liquid recovery tank (1);
one end of the waste liquid blow-down pipeline (10) is suitable for being communicated with the waste liquid blow-down port (2) of the hydrolyzer, and the other end of the waste liquid blow-down pipeline is arranged in the waste liquid recovery box (1);
one end of the filtering pipeline (B) is arranged in the waste liquid recovery box (1), the other end of the filtering pipeline (B) is suitable for being communicated with the urea solution inlet (4) of the hydrolyzer, and a first automatic valve (13), a Y-shaped filter (15), a Lanshi filter (16), a high-pressure pump (17), a pressure gauge (P1) and a check valve (21) are sequentially arranged on the filtering pipeline (B);
demineralized water pipeline (C), one end sets up in waste liquid recovery case (1), one end is suitable for and links to each other with demineralized water interface (3), be close to on demineralized water pipeline (C) the position department of waste liquid recovery case (1) is equipped with first demineralized water automatic valve (11), is close to the position department of demineralized water interface (3) is equipped with second demineralized water automatic valve (12).
2. Waste liquid recovery device for a urea hydrolysis reactor as claimed in claim 1, characterized in that said waste liquid recovery tank (1) is pre-filled with a demineralized water solution, one end of said waste liquid drain (10) being arranged below the level of said demineralized water solution.
3. The apparatus for recycling waste liquid from a urea hydrolysis reactor according to claim 1, wherein a spray pipe (8) is disposed in the waste liquid recycling tank (1), a plurality of spray heads (9) are disposed on the spray pipe (8), and the spray pipe (8) is communicated with one end of the demineralized water pipeline (C).
4. Waste liquid recovery device for a urea hydrolysis reactor according to claim 1, characterized in that at least one remote magnetic flap level gauge (L1) is provided in said waste liquid recovery tank (1), said waste liquid recovery device further comprising a control system for controlling said first automatic valve (13) to open when said remote magnetic flap level gauge (L1) detects that the liquid level in said waste liquid recovery tank (1) reaches 50%.
5. Waste liquid recovery device for a urea hydrolysis reactor according to claim 1, characterized in that the waste liquid recovery tank (1) is externally provided with an insulating layer (7), electric tracing for keeping the temperature inside the waste liquid recovery tank (1) between 50 ℃ and 80 ℃.
6. A device for recycling waste liquid from a urea hydrolysis reactor as claimed in claim 1, wherein said waste liquid recycling tank (1) is provided at the bottom thereof with a first pipe (D) communicating with said sewage drain (5), said first pipe (D) being provided with a first manual valve (18).
7. The apparatus for recycling spent liquor from a urea hydrolysis reactor according to claim 6, wherein the demineralized water line (C) is connected to the filtration line (B) via a connection line (H) provided with a second automatic valve (14) and the connection point of the connection line (H) to the demineralized water line (C) is located between the first demineralized water automatic valve (11) and the second demineralized water automatic valve (12), the connection point of the connection line (H) to the filtration line (B) is located between the first automatic valve (13) and the Y-type filter (15), and the connection point of the connection line (H) to the filtration line (B) is communicated to the first line (D) via a second line (E), and the first line (D) is provided with a second manual valve (19), the downstream position of the check valve (21) is communicated with the first pipeline (D) through a third pipeline (F), and a third manual valve (20) is arranged on the third pipeline (F).
8. A device for the recovery of spent liquor from a urea hydrolysis reactor according to claim 7, characterized in that the tank (1) is provided with a fourth duct (G) near the top end, said fourth duct (G) being in communication with the first duct (D) and the point of connection of the second duct (E) to the first duct (D) being downstream of the first manual valve (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010965426.6A CN111992033A (en) | 2020-09-14 | 2020-09-14 | Waste liquid recovery device of urea hydrolysis reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010965426.6A CN111992033A (en) | 2020-09-14 | 2020-09-14 | Waste liquid recovery device of urea hydrolysis reactor |
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| CN111992033A true CN111992033A (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010965426.6A Pending CN111992033A (en) | 2020-09-14 | 2020-09-14 | Waste liquid recovery device of urea hydrolysis reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117164149A (en) * | 2023-09-12 | 2023-12-05 | 上海鲁源控制设备有限公司 | Efficient sewage disposal equipment for urea hydrolysis |
-
2020
- 2020-09-14 CN CN202010965426.6A patent/CN111992033A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117164149A (en) * | 2023-09-12 | 2023-12-05 | 上海鲁源控制设备有限公司 | Efficient sewage disposal equipment for urea hydrolysis |
| CN117164149B (en) * | 2023-09-12 | 2024-03-08 | 上海鲁源控制设备有限公司 | Pollution discharge equipment for urea hydrolysis |
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