CN202671218U - Urea ammonia producing hydrolyzing device - Google Patents
Urea ammonia producing hydrolyzing device Download PDFInfo
- Publication number
- CN202671218U CN202671218U CN 201220354314 CN201220354314U CN202671218U CN 202671218 U CN202671218 U CN 202671218U CN 201220354314 CN201220354314 CN 201220354314 CN 201220354314 U CN201220354314 U CN 201220354314U CN 202671218 U CN202671218 U CN 202671218U
- Authority
- CN
- China
- Prior art keywords
- reactor
- urea
- ammonia
- reaction kettle
- horizontal type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a urea ammonia producing hydrolyzing device. The urea ammonia producing hydrolyzing device comprises a horizontal type pressure reaction kettle, wherein a heating device is arranged at the bottom part of the horizontal type pressure reaction kettle, urea solution can be input to the horizontal type pressure reaction kettle through a booster pump and a regulating valve, an on-line liquid level meter which is arranged on the horizontal type pressure reaction kettle is used for controlling the liquid level in the horizontal type pressure reaction kettle, ammonia/CO2/water mixture generated due to the decomposition in the horizontal type pressure reaction kettle can be discharged after being subjected to pressure stabilization by a pressure stabilization regulating valve, and the pressure can be relieved through a safety valve or a decompression bypass when the horizontal type pressure reaction kettle is in overpressure. According to the urea ammonia producing hydrolyzing device disclosed by the utility model, the urea solution can be resolved to generate the ammonia, the requirement on different ammonia producing amounts of a denitration project can be met by changing the load change of inputting heat into a control device, and the urea ammonia producing hydrolyzing device can be better matched with the denitration project.
Description
Technical field
The utility model relates to urea ammoniacal liquor solution processed device, utilizes the utility model device urea decomposition can be generated ammonia, to satisfy the ammonia demand of thermal power plants denitration engineering.
Background technology
The discharged nitrous oxides control method of thermal power plants mainly contains catalytic reduction reaction (SCR)/non-catalytic reduction reaction (SNCR), and its principle all is to utilize oxynitride in reductive agent and the flue gas generation nitrogen that reacts.Present most widely used reductive agent is ammonia (NH
3).
Liquefied ammonia low price, but because its chemical property is explosive, belong to the hazardous chemical article, transportation and store all must be through the strict examination of relevant departments should not be used for city or the power station that the crowd is dense.
The urea stable chemical nature, nontoxic, transportation and store conveniently, therefore utilizing urea decomposition ammonia processed is the effective way of solution liquefied ammonia safety problem.
For the urea of denitration engineering ammonia method processed, using is urea pyrolysis more widely at present, and its principle generates ammonia for utilizing high-temperature fuel gas/flue gas (600 ℃) with the rapid evaporation, decomposition of urea soln.But this technological reaction temperature is high, and consumed energy is large, and power plant's electricity consumption is increased.In recent years, the investigator has proposed the technological line of hydrolysis of urea.Hydrolysis reaction is the side reaction in urea production stage, and in the urea production stage, this reaction is extremely faint, and is little on the urea production impact, so reacts for this in the document, and especially the correlative study of its reaction kinetics is few.
Ammonia equipment processed in the denitration engineering belongs to auxiliary system, requires flow process simple, and equipment is simplified, and cost is reasonable, and Ammonia Process should adopt the higher urea soln of concentration, produces to reduce waste liquid, generates fast and effectively ammonia, satisfies the demand of follow-up denitration reaction.
Can adopt the equipment such as desorption tower, flashing tower in the urea production field, decomposing urea waste liquid under the negative pressure hot conditions reclaims ammonia.This kind equipment is generally the tower reactor form, is negative pressure state in the tower, and reaction raw materials is the lower urea soln of concentration (being usually less than 10%), and product is ammonia and a large amount of waste liquid.This class urea ammonia occupation area of equipment processed is large, involves great expense, and produces continuously a large amount of waste liquids, requires to differ larger with the urea of denitration engineering ammonia processed.
Summary of the invention
The purpose of this utility model provides a kind of urea ammoniacal liquor solution processed device, is used for Flue Gas Denitrification Engineering to utilize urea soln to prepare ammonia.
Urea of the present utility model ammoniacal liquor solution processed device comprises:
A Horizontal pressure reactor is provided with heating unit in the bottom of reactor, and opening for feed is located at the reactor bottom, and discharge port is located at the top of reactor;
A topping-up pump is connected with the opening for feed pipeline, is used for urea soln is inputted reactor;
A variable valve is installed on the pipeline between topping-up pump and the opening for feed, is used for regulating the flow that enters the reactor urea soln;
A controlling valve of voltage regulation is installed on the pipeline behind the discharge port, is used for reactor is decomposed the ammonia/CO that generates
2Discharge after the voltage stabilizing of/water mixture;
An online liquidometer is installed on the reactor, is used for the liquid level of control reactor;
A safety valve is installed on the reactor, is used for discharging when the reactor superpressure gaseous phase materials.
Urea of the present utility model ammoniacal liquor solution processed device also includes a pressure release bypass, and described pressure release bypass is installed on the pipeline between discharge port and the controlling valve of voltage regulation, is used for when the reactor superpressure gaseous phase materials being entered wastewater disposal basin.
Wherein, described heating unit is electric heater or steam heating coil.
Further, in the bottom of reactor the periodic blow down mouth is installed also.
Mass concentration is that 40～60% urea soln enters reactor after by topping-up pump and variable valve, and decomposition reaction occurs in reactor, generates ammonia/CO
2The mixture of/water is discharged through behind the pressure stabilization function of controlling valve of voltage regulation.Measurement and feedback by online liquidometer in service utilize the liquid level in the variable valve control reactor constant.In operational process, heating unit provides hydrolysis reaction required heat, by regulating the power input of heating unit, changes the pressure and temperature in the reactor, can realize the load variations of hydrolysis reaction, changes the growing amount of ammonia.
In operational process, if the pressure in the reactor surpasses set(ting)value, then by pressure release bypass or safety valve pressure release, avoid the equipment superpressure, guarantee safety.
Urea of the present utility model ammoniacal liquor solution processed device can decompose urea soln the generation ammonia, satisfies the ammonia demand of denitration engineering.Reaction product is ammonia/water vapor/CO
2Mixture, the mixture stable in properties, not flammable, with can not burn after the air mixed, the danger such as blast.Compare urea pyrolysis technique, energy consumption is low, and it is few to consume electric energy, has good economic and practical.
Urea of the present utility model ammoniacal liquor solution processed appliance arrangement is simplified, and reaction process is without discharging of waste liquid, and steering logic is clear, and operational process is stable, can be better and the denitration engineering be complementary.
Description of drawings
Fig. 1 is the structural representation of the utility model urea ammoniacal liquor solution processed device.
Among the figure: the 1-topping-up pump; The 2-variable valve; The 3-reactor; The 4-controlling valve of voltage regulation; The 5-heating unit; The online liquidometer of 6-; 7-pressure release bypass; The 8-safety valve; 9-periodic blow down mouth; The 10-opening for feed; The 11-discharge port.
Embodiment
Below in conjunction with Fig. 1 the utility model is further described.
The urea ammoniacal liquor solution processed device that ammonia amount processed is 25kg/h, its pressure reaction still 3 is horizontal tank, design pressure 21MPa, physical dimension Ф 500mm * 600mm, material is the 316L stainless steel, wall thickness 15mm.Heating unit 5 adopts electrical heating wire.
The urea soln mass concentration that this device uses is 50%, urea soln consumption 88kg/h during oepration at full load, electrical heating wire design power 250KW.Feedback signal control reactor liquid level according to liquidometer during operation is constant, by changing the pressure and temperature of electrical heating power conditioned reaction still, realizes the variation of hydrolysis device ammonia growing amount.
Be that 50% ammoniacal liquor enters the reactor 3 pressure 0.2～0.8MPa in the reactor 3,100～250 ℃ of temperature after by topping-up pump 1 and variable valve 2 from bottom feed mouth 10 with concentration.By the measurement of online liquidometer 6 and the aperture of feedback control variable valve 2, guarantee that the liquid level in the reactor 3 is constant.Heating unit 5 provides hydrolysis reaction required heat, adjusting heat input in service, and the temperature and pressure in the control reactor 3 is realized the variation of hydrolysis device load and ammonia growing amount.
The reaction product composition of hydrolysis device is ammonia, CO
2With the mixture of water vapor, to be discharged by controlling valve of voltage regulation 4 adjustings by discharge port 11, its quality share is respectively 28.33%, 36.67%, 35.00%, ammonia amount 2.5～25kg/h processed.
When the pressure of reactor 3 surpassed certain value, gas-phase product can be discharged by pressure release bypass 7 or safety valve 8, reduces the pressure in the reactor 3, avoids the container superpressure, guarantees security of system steady running.
In the bottom of reactor 3 periodic blow down mouth 9 is installed.
Claims (4)
1. urea ammoniacal liquor solution processed device is characterized in that including:
A Horizontal pressure reactor is provided with heating unit in the bottom of reactor, and opening for feed is located at the reactor bottom, and discharge port is located at the top of reactor;
A topping-up pump is connected with the opening for feed pipeline, is used for urea soln is inputted reactor;
A variable valve is installed on the pipeline between topping-up pump and the opening for feed, is used for regulating the flow that enters the reactor urea soln;
A controlling valve of voltage regulation is installed on the pipeline behind the discharge port, is used for reactor is decomposed the ammonia/CO that generates
2Discharge after the voltage stabilizing of/water mixture;
An online liquidometer is installed on the reactor, is used for the liquid level of control reactor;
A safety valve is installed on the reactor, is used for discharging when the reactor superpressure gaseous phase materials.
2. urea according to claim 1 ammoniacal liquor solution processed device is characterized in that also including a pressure release bypass, and described pressure release bypass is installed on the pipeline between discharge port and the controlling valve of voltage regulation, is used for when the reactor superpressure gaseous phase materials being entered wastewater disposal basin.
3. urea according to claim 1 and 2 ammoniacal liquor solution processed device is characterized in that described heating unit is electric heater or steam heating coil.
4. urea according to claim 1 and 2 ammoniacal liquor solution processed device is characterized in that in the bottom of reactor the periodic blow down mouth being installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220354314 CN202671218U (en) | 2012-07-21 | 2012-07-21 | Urea ammonia producing hydrolyzing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220354314 CN202671218U (en) | 2012-07-21 | 2012-07-21 | Urea ammonia producing hydrolyzing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202671218U true CN202671218U (en) | 2013-01-16 |
Family
ID=47492135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220354314 Expired - Fee Related CN202671218U (en) | 2012-07-21 | 2012-07-21 | Urea ammonia producing hydrolyzing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202671218U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950954A (en) * | 2014-05-13 | 2014-07-30 | 西安丹辉环保科技有限公司 | Embraced-type heating small urea hydrolysis reaction device and hydrolysis method thereof |
| CN104876242A (en) * | 2015-05-11 | 2015-09-02 | 北京新叶能源科技有限公司 | Three-phase fluidization equipment and method for producing ammonia from urea by virtue of catalytic hydrolysis |
| CN105060313A (en) * | 2015-07-17 | 2015-11-18 | 中国华能集团公司 | Ammonia producing system adopting urea solution hydrolysis |
| CN105948075A (en) * | 2016-04-29 | 2016-09-21 | 中国计量大学 | Kettle type urea-based ammonia preparation system used for SCR denitrification |
| CN110759409A (en) * | 2019-11-29 | 2020-02-07 | 大唐郓城发电有限公司 | Multiple-effect utilization system for urea hydrolysis process and working method thereof |
| CN113417727A (en) * | 2021-06-28 | 2021-09-21 | 潍柴动力股份有限公司 | Method and system for detecting leakage of urea injection system |
-
2012
- 2012-07-21 CN CN 201220354314 patent/CN202671218U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950954A (en) * | 2014-05-13 | 2014-07-30 | 西安丹辉环保科技有限公司 | Embraced-type heating small urea hydrolysis reaction device and hydrolysis method thereof |
| CN104876242A (en) * | 2015-05-11 | 2015-09-02 | 北京新叶能源科技有限公司 | Three-phase fluidization equipment and method for producing ammonia from urea by virtue of catalytic hydrolysis |
| CN105060313A (en) * | 2015-07-17 | 2015-11-18 | 中国华能集团公司 | Ammonia producing system adopting urea solution hydrolysis |
| CN105948075A (en) * | 2016-04-29 | 2016-09-21 | 中国计量大学 | Kettle type urea-based ammonia preparation system used for SCR denitrification |
| CN105948075B (en) * | 2016-04-29 | 2018-01-05 | 中国计量大学 | A kind of SCR denitration autoclave ammonia preparation system from urea |
| CN110759409A (en) * | 2019-11-29 | 2020-02-07 | 大唐郓城发电有限公司 | Multiple-effect utilization system for urea hydrolysis process and working method thereof |
| CN113417727A (en) * | 2021-06-28 | 2021-09-21 | 潍柴动力股份有限公司 | Method and system for detecting leakage of urea injection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202671218U (en) | Urea ammonia producing hydrolyzing device | |
| EP2990096B1 (en) | Method and apparatus for treating acidic tail gas by using ammonia process | |
| US9370745B2 (en) | Flue gas-treating method and apparatus for treating acidic tail gas by using ammonia process | |
| CN101574614B (en) | Desulphurization method for acid gas | |
| CN203507793U (en) | Device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas | |
| CN106823717B (en) | A kind of coke oven flue gas comprehensive treatment system | |
| CN101574616B (en) | Flue gas denitrification process for preparing ammonia with ammonium bicarbonate dry method by pyrolysis and system thereof | |
| CN204799086U (en) | Glass kiln flue gas desulfurization denitration processing system | |
| CN101576261B (en) | Combustion and catalytic reduction method for acid gas | |
| CN101829486A (en) | Process and system for preparing ammonia from ammonium bicarbonate by using wet process for flue gas denitration | |
| CN107585815A (en) | A kind of high-concentration ammonia nitrogenous wastewater cooperates with the method and system administered with flue gas of refuse burning NOx pollutants | |
| CN203990273U (en) | Equipment for reducing the nitrous oxides concentration in the burning gases that produced by burner | |
| CN112794282A (en) | System and method for producing hydrogen by using sulfur-containing flue gas of boiler | |
| CN207209975U (en) | A kind of urea hydrolysis ammonia producing system for denitrating flue gas | |
| CN104386709B (en) | Hydrolysis of urea reactor with waste-heat recovery device | |
| CN207361825U (en) | A kind of high-concentration ammonia nitrogenous wastewater cooperates with the system administered with flue gas of refuse burning NOx pollutants | |
| CN103349898A (en) | SNCR (Selective Non-catalytic Reduction) denitration device and denitration method | |
| CN108176177A (en) | A kind of flue gas desulfurization and denitrification system using hydrolysis of urea ammonia | |
| CN104028084B (en) | Carry out method and the equipment thereof of coal fired power generation denitrating flue gas based on remained ammonia | |
| CN110963507A (en) | Ammonia water ammonia production system and process for coke oven flue gas denitration | |
| CN205659563U (en) | Utilize SCR flue gas denitration system of steam air stripping gasification aqueous ammonia | |
| Jia et al. | A model for performance of sulfite oxidation of ammonia-based flue gas desulfurization system | |
| WO2021143933A1 (en) | Denitration method in alkali recovery furnace | |
| CN103482649B (en) | Urea solution hydrolysis reactor | |
| CN108217606A (en) | Utilize the cross-flow moving bed device of carbon-based material reduction and desulfurization resolution gas Recovered sulphur |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20190721 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |