CN217613939U - Desulfurizing tower entry flue gas heat sink - Google Patents
Desulfurizing tower entry flue gas heat sink Download PDFInfo
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- CN217613939U CN217613939U CN202221103691.4U CN202221103691U CN217613939U CN 217613939 U CN217613939 U CN 217613939U CN 202221103691 U CN202221103691 U CN 202221103691U CN 217613939 U CN217613939 U CN 217613939U
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- flue gas
- desulfurization
- flue
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Abstract
A cooling device for inlet flue gas of a desulfurizing tower comprises a conveying part and a spraying part; the conveying part comprises a spray pipe which is arranged in the flue and is vertical to the flowing direction of the flue gas; the spray pipe is connected with an electric regulating valve arranged outside the flue through a connecting steel pipe, and the electric regulating valve is connected with desulfurization process water through a booster pump device; the spray part comprises a plurality of spiral atomizing nozzles which are uniformly arranged along the same side of the length direction of the spray pipe, and the spiral atomizing nozzles are arranged in the flue and face the center of the desulfurization tower body. The utility model discloses an entry flue gas heat sink can make the high temperature flue gas before getting into the desulfurizing tower, through the cooling of atomizing desulfurization process water, and no secondary pollution reduces the interior desulfurization slurry temperature of tower simultaneously, extension desulfurizing tower life, and construction, running cost hang down, absorb debris such as partial dust in the flue gas simultaneously, finally reach the purpose that reduces the flue gas temperature and improve desulfurization efficiency.
Description
Technical Field
The utility model belongs to the technical field of gas cleaning, especially, relate to a desulfurizing tower entry flue gas heat sink.
Background
SO 2 Is a major atmospheric pollutant that can form acid rain, cause photochemical smog, and destroy the atmospheric ozone layer. With the development of industry and the improvement of living standard of people, the desire for energy is continuously increased, and SO in coal-fired flue gas 2 Has become the main cause of air pollution and reduces SO 2 Pollution is the urgent need for atmospheric environmental control nowadays. The desulfurization device 4 for desulfurization of flue gas of coal-fired industrial boilers and kilns is called a desulfurization tower, is tower equipment for desulfurization treatment of industrial waste gas, and is used for removing SO in flue gas 2 Chemical absorption is carried out.
However, the flue gas temperature in the existing desulfurizing tower is easily too high, thereby causing the following problems:
1) The over-high temperature can cause the liquid level SO in the absorption tower 2 The balance partial pressure is increased, which is not beneficial to gas-liquid mass transfer and leads to the reduction of the desulfurization efficiency; too high flue gas temperature can also cause the service life of brittle materials in the desulfurizing tower to be reduced;
2) The flue gas temperature is high, the specific resistance in an electric field for electric precipitation is high under the same condition, the dust removal efficiency is relatively low, the ash content in the flue gas is increased, and the desulfurization efficiency is reduced;
3) The evaporation of water in the desulfurization slurry is increased, the desulfurization water replenishing rate is increased, and the high humidity of the clean flue gas brings corrosion risk to equipment behind a desulfurization system, including a chimney;
4) The solubility of sulfur dioxide is reduced, and the desulfurization efficiency is reduced;
5) The water evaporation of the absorption tower is accelerated, and the humidity of the purified flue gas is increased;
6) The temperature of the desulfurization slurry is increased, and when the temperature of the desulfurization slurry is increased by 1-2 ℃, the desulfurization efficiency is reduced by 4-5%, which has obvious influence on the desulfurization efficiency; when the temperature of the desulfurization solution is higher than 40 ℃, the desulfurization efficiency is only 60-65% of that of the normal desulfurization solution. Meanwhile, the content of the secondary salt in the tower is increased rapidly. Therefore, in the actual production process, the temperature of the desulfurization solution is controlled to be 35-40 ℃.
SUMMERY OF THE UTILITY MODEL
The utility model provides a desulfurizing tower inlet flue gas cooling device for overcoming the defects in the prior art.
In order to achieve the above object, the utility model provides a following technical scheme does:
a cooling device for inlet flue gas of a desulfurizing tower comprises a conveying part, a spraying part and a desulfurizing control system; the conveying part comprises a spray pipe which is arranged in the flue and is vertical to the flowing direction of the flue gas; the spray pipe is connected with a flow regulating module arranged outside the flue through a connecting steel pipe, and the flow regulating module is connected with desulfurization process water through a booster pump device; the spraying part comprises a plurality of spiral atomizing nozzles which are uniformly arranged on the same side along the length direction of the spraying pipe, and the spiral atomizing nozzles are arranged in the flue and face the center of the desulfurization tower body;
the flow regulating module comprises a turbine flowmeter, an electric regulating valve and an integrated thermal resistance temperature transmitter; the integrated thermal resistance temperature transmitter is arranged on the flue and is arranged at the rear end of the spray pipe; and the integrated thermal resistor temperature transmitter and the electric regulating valve are respectively in signal connection with the desulfurization control system.
Furthermore, the connecting steel pipe is connected with the spray pipe into a whole through a flange; the blind plate is connected with the flue wall and used for fixing the spray pipe on the flue wall.
Furthermore, one end of the connecting steel pipe, which is far away from the spray pipe, is provided with two parallel pipelines, wherein one parallel pipeline branch comprises a turbine flowmeter and an electric regulating valve which are connected in series, and the turbine flowmeter is arranged at the rear end of the electric regulating valve; the rear end of the turbine flowmeter and the front end of the electric regulating valve are respectively connected in series with a flow regulating control valve; the other parallel pipeline is branched into a standby control valve.
Further, the desulfurization control system comprises a DCS control system and an upper computer; the integrated thermal resistance temperature transmitter and the turbine flowmeter are respectively connected with two AI signal modules in the DCS control system; and the electric control valve is connected with an AO signal module of the DCS control system.
Furthermore, a high-temperature alarm system is arranged in the desulfurization control system.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses an entry flue gas heat sink can obtain the flue gas temperature in the flue through desulfurization control system, and according to this temperature, use flow control module to carry out automatically regulated to the process water consumption, make the high temperature flue gas before getting into the desulfurizing tower, through the cooling of atomizing desulfurization process water, no secondary pollution, reduce the interior desulfurization slurry temperature of tower, extension desulfurizing tower life, the construction, the running cost is low, absorb debris such as partial dust in the flue gas simultaneously, finally reach the purpose that reduces the flue gas temperature and improve desulfurization efficiency.
Drawings
FIG. 1 is a schematic structural view of a flue gas cooling device at the inlet of a desulfurizing tower;
fig. 2 is an electrical schematic diagram of the middle flow rate adjusting module and the desulfurization control system of the present invention.
In the figure: 1. a spray pipe; 2. a blind plate; 3. a flange; 41. a standby control valve; 42. a flow regulating control valve; 5. a turbine flow meter; 6. an electric control valve; 7. a spiral atomizing nozzle; 8. connecting the steel pipes; 9. an integrated thermal resistance temperature transmitter; 10. a desulfurizing tower; 11. a flue; 12. a booster pump device.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
As shown in fig. 1 and 2, the utility model discloses a flue gas cooling device at the inlet of a desulfurizing tower, which comprises a conveying part, a spraying part and a desulfurizing control system; the conveying part comprises a spray pipe 1, a blind plate pipe orifice 2, a flow regulating module, a spiral atomizing nozzle 7 and a connecting steel pipe 8; the spray pipe 1 is arranged in the flue 11 perpendicular to the flowing direction of flue gas, the connecting steel pipe 8 is arranged outside the flue 11, and the connecting steel pipe 8 is connected with the spray pipe 1 into a whole through the flange 3 and is used for fixing the spray pipe on the wall of the flue so as to be convenient to disassemble; the connecting steel pipe 8 is connected with desulfurization process water through a booster pump device 12. The spray part comprises at least two spiral atomizing nozzles 7 which are uniformly arranged along the same side of the length direction of the spray pipe, the spiral atomizing nozzles 7 are arranged in the flue 11 and face the center of the desulfurization tower body, and the number can be increased according to design calculation. The inlet pressure of the spiral atomizing nozzle is 0.5-0.7 bar. According to the different process water amount required by cooling the desulfurizing tower, the form of the atomizing nozzle and the size of the spray pipe can be designed and changed.
The flow regulating module comprises a turbine flowmeter 5, an electric regulating valve 6 and an integrated thermal resistance temperature transmitter 9; one end of the connecting steel pipe 8, which is far away from the spray pipe 1, is provided with two parallel pipelines, wherein one parallel branch comprises a turbine flowmeter 5 and an electric regulating valve 6 which are connected in series, the turbine flowmeter 5 is arranged at the rear end of the electric regulating valve 6, and in addition, the rear end of the turbine flowmeter 5 and the front end of the electric regulating valve 6 are respectively connected in series with a flow regulating control valve 42; the other branch is a backup control valve 41, and the backup control valve 41 is closed when the electric control valve 6 is in normal operation, and when the electric control valve 6 fails, the flow regulating control valve 42 is closed, and the backup control valve 41 is opened. The integrated thermal resistance temperature transmitter 9 is installed on the flue and arranged at the rear end of the shower pipe 1.
According to the requirements of technical Specifications for treating industrial boiler flue gas (HJ 462-2021): the temperature of the inlet flue gas is preferably lower than 150 ℃, and the inlet flue gas is preferably subjected to emergency cooling treatment when the temperature is over-temperature. And the integrated thermal resistance temperature transmitter 9 and the electric regulating valve 6 are respectively in signal connection with a desulfurization control system. The desulfurization control system comprises a DCS control system and an upper computer; the integrated thermal resistance temperature transmitter 9 and the turbine flowmeter 5 are respectively connected with two AI signal modules in the DCS control system; the electric control valve 6 is connected with an AO signal module of the DCS control system; the integrated thermal resistance temperature transmitter 9 is used for measuring the temperature of flue gas in a flue, the turbine flowmeter 5 is used for feeding back the flow of desulfurization process water, feeding back information to the DCS controller through the AI signal module, and finally displaying the information in a monitoring picture of the upper computer; the DCS controller judges whether the flue needs spray water cooling or not and the water quantity needed when the flue is cooled to be below 150 ℃ through calculation according to factors such as flue gas properties, flue gas quantity and flue gas temperature, so that the opening and closing degree of the electric regulating valve 6 is controlled through the AO signal module, and field manual control and remote manual/automatic control can be realized. In addition, a high-temperature alarm system is arranged in the desulfurization control system, and when the temperature of the flue gas is too high, the high-temperature alarm system can inform an operator of reacting through alarming.
The selection of the types of the electronic components and the circuit assembly belong to the known technologies in the field, and those skilled in the art can purchase the electronic components according to actual needs and assemble the circuit according to the product use instructions, which are not described herein again.
The working principle is as follows:
the inlet flue gas cooling device of the utility model utilizes the desulfurization process water, arranges the spray pipe 1 in the inlet flue 11 of the desulfurization tower through the blind plate 2 and the flange 3, and can extract the desulfurization process water into the inlet flue of the desulfurization tower through the booster pump device 12, so that the inlet pressure of the spiral atomizing nozzle is 0.5-0.7 bar; along with the change of the temperature of the flue gas, the integrated thermal resistance temperature transmitter 9 feeds back the temperature information of the flue gas in the flue 11 to the desulfurization control system, the desulfurization control system judges whether the flue needs spray water to be cooled and the water quantity needed when the flue is cooled to be below 150 ℃ through calculation according to the factors such as the property of the flue gas, the quantity of the flue gas, the temperature of the flue gas and the like, so that the process water consumption is adjusted through the opening and closing degree of an electric adjusting valve, the desulfurization process water is fully mixed and contacted with the high-temperature flue gas after being atomized by a spiral atomizing nozzle, and the desulfurization process water enters a desulfurization tower along with the flue gas and absorbs partial dust and other impurities in the flue gas at the same time, and finally the purposes of reducing the temperature of the flue gas and improving the desulfurization efficiency are achieved.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a desulfurizing tower entry flue gas heat sink which characterized in that: comprises a conveying part, a spraying part and a desulfurization control system;
the conveying part comprises a spray pipe which is arranged in the flue and is vertical to the flowing direction of the flue gas; the spray pipe is connected with a flow regulating module arranged outside the flue through a connecting steel pipe, and the flow regulating module is connected with desulfurization process water through a booster pump device; the spraying part comprises a plurality of spiral atomizing nozzles which are uniformly arranged on the same side along the length direction of the spraying pipe, and the spiral atomizing nozzles are arranged in the flue and face the center of the desulfurization tower body;
the flow regulating module comprises a turbine flowmeter, an electric regulating valve and an integrated thermal resistance temperature transmitter; the integrated thermal resistance temperature transmitter is arranged on the flue and is arranged at the rear end of the spray pipe; and the integrated thermal resistance temperature transmitter and the electric regulating valve are respectively in signal connection with the desulfurization control system.
2. The desulfurization tower inlet flue gas temperature reduction device of claim 1, wherein: the connecting steel pipe is connected with the spray pipe into a whole through a flange; the blind plate is connected with the flue wall and used for fixing the spray pipe on the flue wall.
3. The desulfurization tower inlet flue gas temperature reduction device of claim 1, wherein: one end of the connecting steel pipe, which is far away from the spray pipe, is provided with two parallel pipelines, wherein one parallel pipeline branch comprises a turbine flowmeter and an electric regulating valve which are connected in series, and the turbine flowmeter is arranged at the rear end of the electric regulating valve; the rear end of the turbine flowmeter and the front end of the electric regulating valve are respectively connected in series with a flow regulating control valve; the other parallel pipeline is branched into a standby control valve.
4. The desulfurization tower inlet flue gas temperature reduction device of claim 1, wherein: the desulfurization control system comprises a DCS control system and an upper computer; the integrated thermal resistance temperature transmitter and the turbine flowmeter are respectively connected with two AI signal modules in the DCS control system; and the electric control valve is connected with an AO signal module of the DCS control system.
5. The desulfurization tower inlet flue gas temperature reduction device of claim 1, wherein: and a high-temperature alarm system is arranged in the desulfurization control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221103691.4U CN217613939U (en) | 2022-04-29 | 2022-04-29 | Desulfurizing tower entry flue gas heat sink |
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| CN202221103691.4U CN217613939U (en) | 2022-04-29 | 2022-04-29 | Desulfurizing tower entry flue gas heat sink |
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| CN217613939U true CN217613939U (en) | 2022-10-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118203940A (en) * | 2024-04-30 | 2024-06-18 | 西安百博智能环保科技有限公司 | Ceramic waste gas desulfurization dust collector |
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2022
- 2022-04-29 CN CN202221103691.4U patent/CN217613939U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118203940A (en) * | 2024-04-30 | 2024-06-18 | 西安百博智能环保科技有限公司 | Ceramic waste gas desulfurization dust collector |
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