CN112090249A - Process water preheating process for semi-dry desulfurization and application - Google Patents
Process water preheating process for semi-dry desulfurization and application Download PDFInfo
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- CN112090249A CN112090249A CN202010842668.6A CN202010842668A CN112090249A CN 112090249 A CN112090249 A CN 112090249A CN 202010842668 A CN202010842668 A CN 202010842668A CN 112090249 A CN112090249 A CN 112090249A
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- process water
- desulfurizing tower
- desulfurization
- semi
- heat exchanger
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 101
- 230000008569 process Effects 0.000 title claims abstract description 92
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 51
- 230000023556 desulfurization Effects 0.000 title claims abstract description 51
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 74
- 239000000428 dust Substances 0.000 claims abstract description 35
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 8
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 238000000889 atomisation Methods 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 230000002349 favourable effect Effects 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002594 sorbent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Classifications
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
Abstract
The invention relates to a process water preheating process for semi-dry desulphurization and application thereof, belonging to the field of semi-dry desulphurization and comprising the following steps: a heat exchanger, a desulfurizing tower and a dust remover; the heat exchanger is respectively connected with a desulfurizing tower inlet flue gas pipeline and a process water pipeline, a water outlet pipe of the heat exchanger is connected with the desulfurizing tower, and the desulfurizing tower is also respectively connected with the process water pipeline and a dust remover. The process water is firstly fed into a heat exchanger arranged in an inlet flue of the desulfurizing tower. The water is heated to a certain temperature and then enters the atomizing spray gun of the desulfurizing tower. The mechanism and mechanism of the set defluidization have no influence, and the change can be brought by: the atomization effect is enhanced. This can be confirmed in practice regardless of the atomization method; the power consumption is reduced, and compared with the method of directly atomizing water without preheating, the same atomizing effect can be achieved under the condition of reducing pressure; the temperature distribution on the same section in the desulfurizing tower is more uniform. Is favorable for desulfurization reaction.
Description
Technical Field
The invention belongs to the field of semi-dry desulphurization, and particularly relates to a process water preheating process for semi-dry desulphurization and application thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The process water plays a role in 'temperature reduction' and 'humidification' in the semidry process defluidization process. In a conventional semidry process defluidization system, process water is generally pressurized by a pump and then directly enters an atomization device of a desulfurization tower. The system configuration is shown in fig. 1. However, the inventor finds that: the arrangement mode of the process water has two problems, one is that the required atomization pressure is higher, and the power consumption of the pump is large; secondly, the temperature distribution uniformity on the section of the desulfurizing tower is poor, and certain adverse effect is caused on the defluidization reaction.
Disclosure of Invention
In order to overcome the problems, the invention provides a process water preheating system for semi-dry desulphurization. The method enhances the atomization effect, reduces the power consumption and ensures that the temperature distribution on the same section in the desulfurizing tower is more uniform. Is favorable for desulfurization reaction.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, there is provided a process water preheating system for semi-dry desulfurization, comprising: a heat exchanger, a desulfurizing tower and a dust remover; the heat exchanger is respectively connected with a desulfurizing tower inlet flue gas pipeline and a process water pipeline, a water outlet pipe of the heat exchanger is connected with the desulfurizing tower, and the desulfurizing tower is also respectively connected with the process water pipeline and a dust remover.
The invention preheats the process water, improves the strong atomization effect, reduces the power consumption, ensures that the temperature distribution on the same section in the desulfurizing tower is more uniform, and is beneficial to the desulfurizing reaction. Meanwhile, a bypass is arranged on the heat exchanger to better control and adjust the temperature of the process water and improve the operation efficiency.
In a second aspect of the present invention, there is provided a process for preheating process water for semidry desulfurization, comprising: firstly, carrying out heat exchange on the desulfurization process water and the inlet flue gas of a desulfurization tower to heat the process water;
and introducing the heated process water into a desulfurizing tower atomizing spray gun.
The preheating process is simple, convenient to operate and high in practicability, the atomization effect is enhanced, the power consumption is reduced, the temperature distribution on the same section in the desulfurizing tower is more uniform, and the desulfurizing efficiency is improved.
In a third aspect of the invention, there is provided the use of any one of the above-described process water preheating systems for semi-dry desulphurization in a semi-dry desulphurization system.
The process water preheating process can effectively increase the atomization effect, reduce the power consumption and improve the desulfurization reaction efficiency, so the process water preheating process is expected to be widely applied to a semi-dry desulfurization system.
The invention has the beneficial effects that:
(1) the atomization effect is enhanced. This is confirmed by practice regardless of the atomization method used.
(2) And the power consumption is reduced. Compared with the method of directly atomizing water without preheating, the method can achieve the same atomization effect under the condition of reducing pressure.
(3) The temperature distribution on the same section in the desulfurizing tower is more uniform. Is favorable for desulfurization reaction.
(4) The invention has simple structure, convenient operation, strong practicability and easy popularization.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic illustration of a prior art process water formulation;
FIG. 2 is a schematic illustration of the process water formulation of example 1 of the present invention;
the system comprises a desulfurizing tower 1, a flue inner heat exchanger 2, a dust remover 3, a fan 4 and a pump 5.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
A process water preheating system for semi-dry desulfurization comprising: a heat exchanger, a desulfurizing tower and a dust remover; the heat exchanger is respectively connected with a desulfurizing tower inlet flue gas pipeline and a process water pipeline, a water outlet pipe of the heat exchanger is connected with the desulfurizing tower, and the desulfurizing tower is also respectively connected with the process water pipeline and a dust remover.
The method enhances the atomization effect, reduces the power consumption and ensures that the temperature distribution on the same section in the desulfurizing tower is more uniform. Is favorable for desulfurization reaction.
In some embodiments, the water outlet pipe of the heat exchanger is also connected with a process water pipeline so as to better control and adjust the temperature of the process water and improve the operation efficiency.
In some embodiments, the water outlet pipe of the heat exchanger is connected with the water inlet of the atomizing spray gun of the desulfurizing tower, so that the process water enters the desulfurizing tower for atomization after being preheated, the atomizing effect is enhanced, and the power consumption is reduced.
In some embodiments, the desulfurization tower is further connected with a sorbent pipeline, flue gas enters a barrel of the desulfurization tower and forms a large gas-liquid contact interface with sorbent slurry spray in an ascending stage inside the desulfurization tower, and the flue gas is in full contact with liquid mist particles in a countercurrent manner to absorb SO in the falling process of the mist particles2And dust particles are captured, so that the flue gas is purified.
In some embodiments, the process water line is provided with a pump that delivers process water into the desulfurization tower and the heat exchanger.
In some embodiments, the dust collector is connected with a fan to separate dust from flue gas, so that the operation stability of the system is improved.
In some embodiments, the dust remover is provided with a desulfurized ash outlet, and byproducts generated by desulfurization are collected for subsequent comprehensive utilization.
In some embodiments, the desulfurized ash outlet is connected to a desulfurization tower, and the desulfurized ash is conveyed to the bottom of the desulfurization tower for secondary utilization.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1:
the desulfurization process water is pressurized by a pump 5 and then enters a heat exchanger 2 arranged in an inlet flue of the desulfurizing tower 1 instead of directly entering an atomizing spray gun of the desulfurizing tower 1. The water is heated to a certain temperature and then enters the atomizing spray gun of the desulfurizing tower 1. As shown in fig. 2.
The mechanism and mechanism of the set defluidization have no influence, and the change can be brought by: 1) the atomization effect is enhanced. This is confirmed by practice regardless of the atomization method used. 2) And the power consumption is reduced. Compared with the method of directly atomizing water without preheating, the method can achieve the same atomization effect under the condition of reducing pressure. 3) The temperature distribution on the same section in the desulfurizing tower is more uniform. Is favorable for desulfurization reaction.
Example 2:
a process water preheating system for semi-dry desulfurization comprising: a heat exchanger 2, a desulfurizing tower 1 and a dust remover 3; the heat exchanger 2 is respectively connected with an inlet flue gas pipeline and a process water pipeline of the desulfurizing tower 1, a water outlet pipe of the heat exchanger 2 is connected with the desulfurizing tower 1, and the desulfurizing tower 1 is also respectively connected with the process water pipeline and the dust remover 3.
Example 3:
a process water preheating system for semi-dry desulfurization comprising: a heat exchanger 2, a desulfurizing tower 1 and a dust remover 3; the heat exchanger 2 is respectively connected with an inlet flue gas pipeline and a process water pipeline of the desulfurizing tower 1, a water outlet pipe of the heat exchanger 2 is connected with the desulfurizing tower 1, and the desulfurizing tower 1 is also respectively connected with the process water pipeline and the dust remover 3.
The water outlet pipe of the heat exchanger 2 is also connected with a process water pipeline so as to better control and adjust the temperature of the process water and improve the operation efficiency.
Example 4:
a process water preheating system for semi-dry desulfurization comprising: a heat exchanger 2, a desulfurizing tower 1 and a dust remover 3; the heat exchanger 2 is respectively connected with an inlet flue gas pipeline and a process water pipeline of the desulfurizing tower 1, a water outlet pipe of the heat exchanger 2 is connected with the desulfurizing tower 1, and the desulfurizing tower 1 is also respectively connected with the process water pipeline and the dust remover 3.
The water outlet pipe of the heat exchanger 2 is connected with the water inlet of the atomizing spray gun of the desulfurizing tower 1, so that the process water enters the desulfurizing tower 1 for atomization after being preheated, the atomization effect is enhanced, and the power consumption is reduced.
Example 5:
a process water preheating system for semi-dry desulfurization comprising: a heat exchanger 2, a desulfurizing tower 1 and a dust remover 3; the heat exchanger 2 is respectively connected with an inlet flue gas pipeline and a process water pipeline of the desulfurizing tower 1, a water outlet pipe of the heat exchanger 2 is connected with the desulfurizing tower 1, and the desulfurizing tower 1 is also respectively connected with the process water pipeline and the dust remover 3.
The desulfurizing tower 1 is also connected with a absorbent pipeline, the flue gas enters the barrel of the desulfurizing tower 1, a larger gas-liquid contact interface is formed by spraying the flue gas and absorbent slurry in the ascending stage in the desulfurizing tower 1, the flue gas is fully contacted with the liquid fog particles in a countercurrent manner and falls through the fog particlesIn-process absorption of SO2And dust particles are captured, so that the flue gas is purified.
Example 6:
a process water preheating system for semi-dry desulfurization comprising: a heat exchanger 2, a desulfurizing tower 1 and a dust remover 3; the heat exchanger 2 is respectively connected with an inlet flue gas pipeline and a process water pipeline of the desulfurizing tower 1, a water outlet pipe of the heat exchanger 2 is connected with the desulfurizing tower 1, and the desulfurizing tower 1 is also respectively connected with the process water pipeline and the dust remover 3.
The process water pipeline is provided with a pump 5 for driving the process water to enter the desulfurizing tower 1 and the heat exchanger 2.
Example 7:
a process water preheating system for semi-dry desulfurization comprising: a heat exchanger 2, a desulfurizing tower 1 and a dust remover 3; the heat exchanger 2 is respectively connected with an inlet flue gas pipeline and a process water pipeline of the desulfurizing tower 1, a water outlet pipe of the heat exchanger 2 is connected with the desulfurizing tower 1, and the desulfurizing tower 1 is also respectively connected with the process water pipeline and the dust remover 3.
The dust remover 3 is connected with the fan 4 to separate dust from flue gas, and the stability of system operation is improved.
Example 8:
a process water preheating system for semi-dry desulfurization comprising: a heat exchanger 2, a desulfurizing tower 1 and a dust remover 3; the heat exchanger 2 is respectively connected with an inlet flue gas pipeline and a process water pipeline of the desulfurizing tower 1, a water outlet pipe of the heat exchanger 2 is connected with the desulfurizing tower 1, and the desulfurizing tower 1 is also respectively connected with the process water pipeline and the dust remover 3.
The dust remover 3 is provided with a desulfurized fly ash outlet, and by-products generated by desulfurization are collected, so that subsequent comprehensive utilization is facilitated.
Example 9:
a process water preheating system for semi-dry desulfurization comprising: a heat exchanger 2, a desulfurizing tower 1 and a dust remover 3; the heat exchanger 2 is respectively connected with an inlet flue gas pipeline and a process water pipeline of the desulfurizing tower 1, a water outlet pipe of the heat exchanger 2 is connected with the desulfurizing tower 1, and the desulfurizing tower 1 is also respectively connected with the process water pipeline and the dust remover 3.
And the desulfurization ash outlet is connected with the desulfurization tower 1, and the desulfurization ash is conveyed to the bottom of the desulfurization tower 1 for secondary utilization.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A process water preheating system for semi-dry desulphurization, comprising: a heat exchanger, a desulfurizing tower and a dust remover; the heat exchanger is respectively connected with a desulfurizing tower inlet flue gas pipeline and a process water pipeline, a water outlet pipe of the heat exchanger is connected with the desulfurizing tower, and the desulfurizing tower is also respectively connected with the process water pipeline and a dust remover.
2. The process water preheating system for semi-dry desulfurization as set forth in claim 1, wherein the outlet pipe of the heat exchanger is further connected to a process water pipe.
3. The process water preheating system for semi-dry desulfurization as set forth in claim 1, wherein the outlet pipe of the heat exchanger is connected to the inlet port of the atomizing lance of the desulfurization tower.
4. The process water preheating system for semi-dry desulfurization as set forth in claim 1, wherein the desulfurization tower is further connected to an absorbent pipe.
5. The process water preheating system for semi-dry desulfurization as set forth in claim 1, wherein the process water pipe is provided with a pump.
6. The process water preheating system for semi-dry desulfurization as set forth in claim 1, wherein the dust collector is connected to a blower.
7. The process water preheating system for semi-dry desulfurization as set forth in claim 1, wherein the dust collector is provided with a desulfurization ash outlet.
8. The process water preheating system for semi-dry desulfurization according to claim 7, wherein the desulfurization ash outlet is connected to a desulfurization tower.
9. A process water preheating method for semidry desulfurization is characterized by comprising the following steps: firstly, carrying out heat exchange on the desulfurization process water and the inlet flue gas of a desulfurization tower to heat the process water;
and introducing the heated process water into a desulfurizing tower atomizing spray gun.
10. Use of a process water preheating system for semi-dry desulphurization according to any one of claims 1-8 in a semi-dry desulphurization system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010842668.6A CN112090249A (en) | 2020-08-20 | 2020-08-20 | Process water preheating process for semi-dry desulfurization and application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010842668.6A CN112090249A (en) | 2020-08-20 | 2020-08-20 | Process water preheating process for semi-dry desulfurization and application |
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| CN112090249A true CN112090249A (en) | 2020-12-18 |
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2020
- 2020-08-20 CN CN202010842668.6A patent/CN112090249A/en active Pending
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Application publication date: 20201218 |