CN112206740A - Urea hydrolysis reactor with partitioned control - Google Patents
Urea hydrolysis reactor with partitioned control Download PDFInfo
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- CN112206740A CN112206740A CN202011315606.6A CN202011315606A CN112206740A CN 112206740 A CN112206740 A CN 112206740A CN 202011315606 A CN202011315606 A CN 202011315606A CN 112206740 A CN112206740 A CN 112206740A
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- Prior art keywords
- hydrolysis reactor
- reactor tank
- tank body
- steam
- urea
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
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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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
A urea hydrolysis reactor controlled in a partitioning mode comprises a hydrolysis reactor tank body, wherein a plurality of component partitioning plates used for partitioning the hydrolysis reactor tank body into a plurality of compartments from front to back are arranged in the hydrolysis reactor tank body, and each compartment is provided with a feeding hole, a sewage draining outlet, a liquid level meter interface and a thermometer interface; the bottom in the hydrolysis reactor tank body is provided with a steam coil. When the urea hydrolysis reactor capable of being controlled in a partitioning mode is operated specifically, different quantities of compartments can be accurately controlled according to different NOx concentrations of a unit under different loads, so that the required ammonia gas quantity is generated. According to the invention, the solution in different compartments can be used for accurately producing ammonia according to actual requirements, so that the quality of steam is kept unchanged, and the solution amount is reduced by phase change, thereby effectively improving the efficiency.
Description
Technical Field
The invention belongs to the field of urea solution hydrolysis ammonia production, and relates to a urea hydrolysis reactor with zone control.
Background
With the national requirements for the safe operation of the thermal power plant being higher and higher, the thermal power plant gradually adopts urea with higher safety coefficient as a denitration reducing agent to replace liquid ammonia with high danger coefficient, and the change of the reducing agent causes the ammonia production process to be correspondingly changed, so that the urea hydrolysis reactor becomes indispensable necessary equipment.
The capacity of the hydrolysis reactor is designed according to the concentration of NOx to be treated by tail flue gas under the condition that a boiler is 100% BMCR, even some extreme conditions need to be considered, and during actual operation, a thermal power generating unit cannot reach the peak value of the conditions generally or works under a lower load for a long time, so the design output of the hydrolysis reactor is generally far higher than the actual operation condition. If only by adjusting hydrolysis reactor import steam volume or urea solution injection volume, must produce the phenomenon that the steam quality descends, and the reaction of hydrolysising is slow, leads to whole system efficiency to descend, and the pipeline is easier to be crystallized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a urea hydrolysis reactor with zone control, which can heat urea solution in a tank in a zone mode according to actual operation conditions so as to generate ammonia gas as required under the conditions of not reducing steam quality and not influencing hydrolysis reaction rate.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a urea hydrolysis reactor controlled in a partitioning mode comprises a hydrolysis reactor tank body, wherein a plurality of component partitioning plates used for partitioning the hydrolysis reactor tank body into a plurality of compartments from front to back are arranged in the hydrolysis reactor tank body, and each compartment is provided with a feeding hole, a sewage draining outlet, a liquid level meter interface and a thermometer interface; the bottom in the hydrolysis reactor tank body is provided with a steam coil.
The invention has the further improvement that the sewage draining exit comprises a middle sewage draining exit and a bottom sewage draining exit, and the bottom sewage draining exit is positioned below the middle sewage draining exit.
The invention is further improved in that the top of the hydrolysis reactor tank body is provided with a product gas demister.
The invention is further improved in that the bottom of the tank body of the hydrolysis reactor is provided with a supporting leg.
The invention is further improved in that the end part of the hydrolysis reactor tank body is provided with a seal head.
The invention has the further improvement that the end part of the steam coil pipe is provided with a drainage outlet and a plurality of steam inlets.
The invention is further improved in that the steam coil is fixed in the hydrolysis reactor tank body through a fixing bracket.
A further improvement of the invention is that the steam coil passes through each compartment and the steam coil located in each compartment is divided by a steam coil partition.
Compared with the prior art, the invention has the following beneficial effects: according to the urea hydrolysis reactor capable of being controlled in a partitioning mode, a plurality of component partitioning plates for partitioning the hydrolysis reactor tank body into a plurality of compartments from front to back are arranged in the hydrolysis reactor tank body, and the steam coil is arranged. According to the invention, the solution in different compartments can be used for accurately producing ammonia according to actual requirements, so that the quality of steam is kept unchanged, and the solution amount is reduced by phase change, thereby effectively improving the efficiency. The problem that in the prior art, the steam quality is reduced along with the reduction of the valve opening in order to control the gas production rate under the past condition, particularly under low load, and the problem that the reaction efficiency is greatly reduced due to the superposition of two factors and the fact that the solution amount is basically unchanged no matter the output of the hydrolysis reactor due to the liquid level requirement of a horizontal tank are solved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a view along direction a in fig. 1.
Wherein, 1 is the hydrolysis reactor jar body, 2 is the product gas defroster, 3 is the head, 4 is the subregion baffle, 5 is the level gauge interface, 6 is the thermometer interface, 7 is the feed inlet, 8 is middle part drain, 9 is the bottom drain, 10 is steam inlet, 11 is hydrophobic export, 12 is the steam coil pipe, 13 is the fixed bolster, 14 is the landing leg, 15 is the steam coil pipe baffle.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Referring to fig. 1 and 2, the urea hydrolysis reactor capable of being controlled in a partitioning manner comprises a hydrolysis reactor tank body 1, wherein a product gas demister 2, a partitioning partition plate 4, a liquid level meter interface 5, a thermometer interface 6, a feeding hole 7, a middle sewage draining outlet 8, a bottom sewage draining outlet 9 and supporting legs 14 are arranged on the hydrolysis reactor tank body 1. Specifically, 1 tops of the hydrolysis reactor tank bodies are provided with product gas demisters 2, the bottoms of the hydrolysis reactor tank bodies 1 are provided with supporting legs 14, the hydrolysis reactor tank bodies 1 are arranged on the supporting legs 14, and the end portions of the hydrolysis reactor tank bodies 1 are provided with seal heads 3.
A plurality of groups of partition plates 4 are arranged in the hydrolysis reactor tank body 1, the hydrolysis reactor tank body 1 is divided into a plurality of compartments from front to back, and each compartment is provided with a feed inlet 7, a middle sewage discharge outlet 8, a bottom sewage discharge outlet 9, a liquid level meter interface 5 and a thermometer interface 6 so as to realize accurate control. The bottom drain outlet 9 is positioned below the middle drain outlet 8.
The bottom in the hydrolysis reactor tank body 1 is provided with a steam coil 12, the end part of the steam coil 12 is provided with a hydrophobic outlet 11 and a plurality of steam inlets 10, and the steam coil 12 is fixed in the hydrolysis reactor tank body 1 through a fixed support 13. The steam coil 12 passes through each compartment and the inlet in the steam coil 12 in each compartment is divided by a steam coil partition 15.
The steam coils 12 are arranged at the bottom of the corresponding compartments according to different lengths, the inlets are separated by a steam coil clapboard 15, and all the steam coils 12 share one path of water drainage.
When the load of the unit is low and the required ammonia amount is less, only the steam inlet valve of the front compartment is opened, and when the load of the unit is high and the required ammonia amount is greater, the steam inlet valves of the other compartments can be opened in sequence until the ammonia amount meeting the requirement is generated.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. But all changes which come within the scope of the invention are intended to be embraced therein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Claims (8)
1. A urea hydrolysis reactor controlled in a partitioning mode is characterized by comprising a hydrolysis reactor tank body (1), wherein a plurality of component partitioning plates (4) used for partitioning the hydrolysis reactor tank body (1) into a plurality of compartments from front to back are arranged in the hydrolysis reactor tank body (1), and each compartment is provided with a feeding hole (7), a sewage draining hole, a liquid level meter interface (5) and a thermometer interface (6); the bottom in the hydrolysis reactor tank body (1) is provided with a steam coil (12).
2. A zoned controlled urea hydrolysis reactor according to claim 1, characterized in that the drain comprises a middle drain (8) and a bottom drain (9), the bottom drain (9) being located below the middle drain (8).
3. A zoned controlled urea hydrolysis reactor according to claim 1, characterized in that the hydrolysis reactor tank (1) is provided with a product gas demister (2) at the top.
4. A zoned controlled urea hydrolysis reactor according to claim 1, characterized in that the bottom of the hydrolysis reactor tank (1) is provided with legs (14).
5. A urea hydrolysis reactor with zonal control according to claim 1, characterized in that the end of the hydrolysis reactor tank (1) is provided with a head (3).
6. A urea hydrolysis reactor with zoned control according to claim 1, characterized in that the steam coil (12) has a hydrophobic outlet (11) and several steam inlets (10) at its ends.
7. A zoned controlled urea hydrolysis reactor according to claim 1, characterized in that the steam coil (12) is fixed inside the hydrolysis reactor tank (1) by means of fixing brackets (13).
8. A urea hydrolysis reactor with zoned control according to claim 1, characterized in that the steam coil (12) passes through each compartment, the steam coil (12) located in each compartment being divided by a steam coil partition (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011315606.6A CN112206740A (en) | 2020-11-21 | 2020-11-21 | Urea hydrolysis reactor with partitioned control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011315606.6A CN112206740A (en) | 2020-11-21 | 2020-11-21 | Urea hydrolysis reactor with partitioned control |
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| Publication Number | Publication Date |
|---|---|
| CN112206740A true CN112206740A (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011315606.6A Pending CN112206740A (en) | 2020-11-21 | 2020-11-21 | Urea hydrolysis reactor with partitioned control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058522A (en) * | 2021-04-29 | 2021-07-02 | 西安热工研究院有限公司 | Three-dimensional bin-divided urea hydrolysis reaction system and method |
| CN114835139A (en) * | 2022-04-13 | 2022-08-02 | 同兴环保科技股份有限公司 | Urea hydrolysis process control method capable of quickly responding to strain load |
-
2020
- 2020-11-21 CN CN202011315606.6A patent/CN112206740A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058522A (en) * | 2021-04-29 | 2021-07-02 | 西安热工研究院有限公司 | Three-dimensional bin-divided urea hydrolysis reaction system and method |
| CN114835139A (en) * | 2022-04-13 | 2022-08-02 | 同兴环保科技股份有限公司 | Urea hydrolysis process control method capable of quickly responding to strain load |
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