CN215027541U - Semi-dry desulfurization process water adjusting device - Google Patents
Semi-dry desulfurization process water adjusting device Download PDFInfo
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- CN215027541U CN215027541U CN202120830132.2U CN202120830132U CN215027541U CN 215027541 U CN215027541 U CN 215027541U CN 202120830132 U CN202120830132 U CN 202120830132U CN 215027541 U CN215027541 U CN 215027541U
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Abstract
The utility model relates to a boiler afterbody flue gas treatment technical field specifically is a semidry desulfurization technology water adjusting device, include water tank, water intake pipe, send water to be responsible for, a plurality of water nozzles, locate high-pressure power frequency water pump and electric switch valve I on sending water to be responsible for, locate electric switch valve II on the water intake pipe, its technical essential is: the inlet pipeline of each water nozzle is equipped with branch return water pipeline in addition on, and the tip and the return water main line of each branch return water pipeline are connected, and the end and the return water mouth that the water tank top set up of return water main line are connected, are equipped with return water governing valve and electromagnetic flow meter on the return water main line, and the electromagnetic flow meter is located between return water governing valve and the water nozzle, and the inlet pipeline is equipped with the filter screen valve at the entrance side of electric switch valve II. The device solves the problem that the water pump motor is easy to damage or the atomization effect is poor in the existing semidry desulfurization process water quantity control method, prolongs the service life of water pump equipment, and simultaneously ensures the stable spray gun atomization effect.
Description
Technical Field
The utility model relates to a boiler afterbody flue gas treatment technical field specifically is a semidry desulfurization technology water adjusting device.
Background
For the treatment of flue gas at the tail of a boiler in the industries of electric power, heating and the like, denitration, dust removal, desulfurization and other processes are generally used for meeting increasingly strict environmental protection requirements in China. The flue gas desulfurization process can be divided into wet desulfurization, semi-dry desulfurization, dry desulfurization and the like. Wherein, the semi-dry desulfurization method is divided into a spraying semi-dry method and a tail process activation method of calcium spraying in a furnace. Aiming at the spray semi-dry desulfurization technology, the spray-drying principle is utilized, the powdery desulfurizer and the process water are respectively sprayed into a desulfurization reaction tower, and after the absorbent is sprayed into an absorption tower, the absorbent and SO in the flue gas are enabled to be absorbed2Carrying out chemical reaction to generate solid ash; meanwhile, the flue gas transfers heat to the absorbent to dry the absorbent continuously. The waste residue formed after the desulfurization reaction in the tower is in a solid dust shape, one part is separated in the tower, and the other part enters a tail dust remover along with the desulfurized flue gas; the materials entering the tail dust remover and the dust are blown into the desulfurizing tower through the material pouring chute under the action of the fan, so that the maximum utilization of the desulfurizing agent is realized. The reactions in this process include physical and chemical reactions: atomization of process water, drying of droplets, SO2The reaction with a desulfurizing agent (including gas-liquid reaction and gas-solid reaction), the separation and circulation of the desulfurized ash and other important links.
The water quantity of the process water is an important control parameter for the final desulfurization effect of the semi-dry desulfurization. The flue gas temperature in the absorption tower can be quickly and effectively controlled within a certain range by adjusting the process water amount, so that the flue gas temperature is always in the optimal temperature range of the desulfurization reaction; in addition, the atomized process water forms extremely fine fog drops (about 30 mu m), so that the specific surface area of gas-liquid contact is greatly increased, and higher desulfurization efficiency can be achieved by spraying less desulfurizing agent. Therefore, how to reasonably control the process water amount becomes a key problem in the semi-dry desulfurization process.
The existing method for controlling the water quantity of the semi-dry desulfurization process generally adopts a control mode of 'power frequency water pump + regulating valve' or 'variable frequency water pump + switch valve', and according to SO in an inlet flue2The content of (b) is interlocked with an adjusting valve or a frequency converter respectively, thereby controlling the water quantity. The two process arrangements are completely the same, and the difference is only that the water pump is replaced or the valve is replaced. Wherein the former is controlled by a regulating valve, SO in the flue gas2When the content is low, the water spraying amount is often small, the opening degree of a valve is small, and a motor is easy to heat in the running process of a water pump, so that equipment is easy to damage; the latter passes through the converter regulating pondage, though avoided the condition that the motor generates heat, in actual operation, can't keep spray gun outlet pressure stable under changeable load state, and the atomization effect is relatively poor. Thus, neither of the above methods completely meets the requirements of the spraying process.
Disclosure of Invention
The utility model aims at providing a rational in infrastructure, use reliable semi-dry desulfurization process water adjusting device, solve current semi-dry desulfurization process water control method and easily cause the problem that the water pump motor damages or atomization effect is poor, arrange and the instrument setting through reasonable return circuit, extension water pump equipment life guarantees stable spray gun atomization effect simultaneously.
The technical scheme of the utility model is that:
the utility model provides a semidry desulfurization process water adjusting device, includes the water tank, locates a plurality of water nozzles in the desulfurizing tower, connects the water supply main pipe between each water nozzle inlet pipeline and water tank, locates high-pressure power frequency water pump and electric switch valve I on the water supply main pipe, locates the water intake pipe on water tank upper portion, locates electric switch valve II on the water intake pipe, and its technical essential is: the inlet pipeline of each water nozzle is additionally provided with a branch return water pipeline, the end part of each branch return water pipeline is led out of the desulfurizing tower and is connected with a return water main pipeline, the tail end of the return water main pipeline is connected with a return water port arranged at the top of the water tank, the return water main pipeline is provided with a return water regulating valve and an electromagnetic flowmeter, the electromagnetic flowmeter is positioned between the return water regulating valve and the water nozzle, and the inlet pipeline is provided with a filter screen valve on the inlet side of the electric switch valve II.
According to the semi-dry desulfurization process water adjusting device, the return water main pipeline is provided with the control valve I and the control valve II on the inlet side and the outlet side of the return water adjusting valve respectively, the bypass pipeline I is connected between the inlet side of the control valve I and the outlet side of the control valve II, and the bypass pipeline I is provided with the control valve III so as to facilitate maintenance and replacement of the return water adjusting valve.
According to the semi-dry desulfurization process water adjusting device, the water supply main pipe is provided with the control valve IV and the control valve V on the inlet side and the outlet side of the high-pressure power frequency water pump respectively, the water tank is additionally provided with the water outlet, the water supply branch pipeline is connected between the water outlet and the outlet side of the control valve V, the water supply branch pipeline is provided with the high-pressure power frequency standby water pump, and the water supply branch pipeline is provided with the control valve VI and the control valve VII on the inlet side and the outlet side of the high-pressure power frequency standby water pump respectively, so that when the high-pressure power frequency water pump fails, the high-pressure power frequency standby water pump is utilized to continue to work, and normal production is not affected.
According to the semi-dry desulfurization process water adjusting device, the inlet side of the filter screen valve of the water inlet pipeline is provided with the control valve VIII, the outlet side of the electric switch valve II of the water inlet pipeline is provided with the control valve IX, the bypass pipeline II is connected between the inlet side of the control valve VIII and the outlet side of the control valve IX, and the control valve X is arranged on the bypass pipeline II so as to facilitate maintenance and replacement of the filter screen valve.
According to the semi-dry desulfurization process water adjusting device, the water inlet pipeline is provided with a back-flushing drainage pipeline on the inlet sides of the control valve VIII and the bypass pipeline II.
The utility model has the advantages that:
1. each branch return water pipeline, the return water main pipeline and the return water regulating valve are added, and the return water flow is controlled by the return water regulating valveThereby avoiding the on-site generation of a 'hold pump', preventing the damage of water pump equipment, and being beneficial to an atmospheric pollutant detection system (for detecting SO) with a return water regulating valve and a flue gas inlet2Content) is interlocked, and the water quantity is automatically adjusted and the human intervention frequency is reduced by controlling through a DCS control system.
2. The electromagnetic flowmeter is additionally arranged in the main backwater pipeline, so that on one hand, the amount of backwater can be accurately judged, and the amount of process water sprayed into the desulfurizing tower can be accurately calculated through the fixed water amount of the high-pressure power frequency water pump, so that accurate metering is realized; on the other hand, whether the backwater is normal or not and whether the backwater regulating valve works normally can be judged through the electromagnetic flowmeter, and a basis is provided for overhauling the backwater regulating valve.
3. The water pump need not use the frequency conversion water pump, and the power frequency can, assurance spray gun outlet pressure value that can be more stable is stable to realize the stable atomization effect of water nozzle, also can embody the stability of atomization effect directly perceived through electromagnetic flowmeter's detection data.
4. Through the setting of filter screen valve, impurity such as sand in the aquatic gets into the water pump, extension equipment life.
Through repeated tests and field engineering operation feedback, the electromagnetic flowmeter has accurate measurement value, good atomization effect of the water nozzle and stable desulfurization discharge effect. Not only ensures that the desulfurization emission can reach the standard stably, prolongs the service life of equipment, but also improves the automation degree. Compare in the technical scheme who adopts the frequency conversion water pump, the utility model discloses the price is cheaper, and is with low costs, has compromise the stability and the reliability of whole effect simultaneously, has practiced thrift the investment.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the system comprises a water inlet pipeline, 2, bypass pipelines II, 3, control valves X, 4, a filter screen valve, 5, electric switch valves II, 6, a water tank, 7, a water return main pipeline, 8, bypass pipelines I, 9, a water return regulating valve, 10, control valves III, 11, an electromagnetic flow meter, 12, a branch water return pipeline, 13, a water nozzle, 14, a desulfurization tower, 15, a water supply main pipeline, 16, electric switch valves I, 17, control valves V, 18, a high-pressure power frequency water pump, 19, control valves IV, 20, a water supply branch pipeline, 21, control valves VII, 22, a high-pressure power frequency standby water pump, 23, control valves VI and 24, control valves IX, 25, control valves VIII, 26, a water discharge pipeline, 27, a back flush water discharge port, 28, control valves I, 29 and a control valve II.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and reference numerals.
As shown in figure 1, the semi-dry desulphurization process water adjusting device comprises a water tank 6, a plurality of water nozzles 13 arranged in a desulphurization tower 14, a water supply main pipe 15 connected between an inlet pipeline of each water nozzle 13 and the water tank 6, a high-pressure power frequency water pump 18 and an electric switch valve I16 which are arranged on the water supply main pipe 15, a water inlet pipeline 1 arranged at the upper part of the water tank 6, and an electric switch valve II 5 arranged on the water inlet pipeline 1. A branch return water pipeline 12 is additionally arranged on an inlet pipeline of each water nozzle 13, the end part of each branch return water pipeline 12 is led out of a desulfurizing tower 14 and is connected with a return water main pipeline 7, the tail end of the return water main pipeline 7 is connected with a return water port arranged at the top of the water tank 6, a return water regulating valve 9 and an electromagnetic flowmeter 11 are arranged on the return water main pipeline 7, the electromagnetic flowmeter 11 is positioned between the return water regulating valve 9 and the water nozzles 13, and a filter screen valve 4 is arranged on the inlet side of the water inlet pipeline 1 at the electric switch valve II 5.
In this embodiment, the return water main pipeline 7 is provided with a control valve i 28 and a control valve ii 29 on the inlet side and the outlet side of the return water regulating valve 9, a bypass pipeline i 8 is connected between the inlet side of the control valve i 28 and the outlet side of the control valve ii 29, and a control valve iii 10 is arranged on the bypass pipeline i 8, so that the return water regulating valve 9 is convenient to maintain and replace. The water supply main pipe 15 is provided with a control valve IV 19 and a control valve V17 on the inlet side and the outlet side of a high-pressure power frequency water pump 18 respectively, the water tank 6 is additionally provided with a water outlet, a water supply branch pipeline 20 is connected between the water outlet and the outlet side of the control valve V17, a high-pressure power frequency standby water pump 22 is arranged on the water supply branch pipeline 20, and a control valve VI 23 and a control valve VII 21 are arranged on the inlet side and the outlet side of the high-pressure power frequency standby water pump 22 on the water supply branch pipeline 20 respectively, so that when the high-pressure power frequency water pump 18 breaks down, the high-pressure power frequency standby water pump 22 is utilized to continue to work, and normal production is not affected. The inlet pipe 1 is equipped with control valve VIII 25 at the entrance side of filter screen valve 4, and inlet pipe 1 is equipped with control valve IX 24 at the outlet side of electric switch valve II 5, connect bypass line II 2 between the entrance side of control valve VIII 25 and the outlet side of control valve IX 24, be equipped with control valve X3 on the bypass line II 2 to convenient maintenance and change filter screen valve 4. The water inlet pipeline 1 of the water tank 6 is provided with a back flush drainage pipeline 26 at the inlet side of the control valve VIII 25 and the bypass pipeline II 2, and the bottom of the water tank 6 is further provided with a water outlet 27.
When in use, the high-pressure industrial frequency water pump 18 sends water to each water nozzle 13 through the water feeding pipeline 15, and simultaneously, the return water regulating valve 9 is opened to regulate the SO of the flue gas at the inlet of the desulfurizing tower 14 according to the SO2The opening degree of the return water regulating valve 9 is regulated by content, the return water quantity is controlled, water is sent according to the requirement, a pump is prevented from being held back, and whether the return water quantity, the water consumption and the return water condition are normal and whether the spraying effect of the water nozzle is stable are monitored through the feedback of the electromagnetic flowmeter 11.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (5)
1. The utility model provides a semidry desulfurization process water adjusting device, includes the water tank, locates a plurality of water nozzles in the desulfurizing tower, connect and be responsible for, locate high-pressure power frequency water pump and electric switch valve I on being responsible for, locating the water inlet pipeline on water tank upper portion, locate electric switch valve II on the water inlet pipeline in the water supply main pipe between each water nozzle inlet pipeline and water tank, its characterized in that: the inlet pipeline of each water nozzle is additionally provided with a branch return water pipeline, the end part of each branch return water pipeline is led out of the desulfurizing tower and is connected with a return water main pipeline, the tail end of the return water main pipeline is connected with a return water port arranged at the top of the water tank, the return water main pipeline is provided with a return water regulating valve and an electromagnetic flowmeter, the electromagnetic flowmeter is positioned between the return water regulating valve and the water nozzle, and the inlet pipeline is provided with a filter screen valve on the inlet side of the electric switch valve II.
2. The semi-dry desulfurization process water conditioning device according to claim 1, characterized in that: the water return main pipeline is provided with a control valve I and a control valve II on the inlet side and the outlet side of the water return regulating valve respectively, a bypass pipeline I is connected between the inlet side of the control valve I and the outlet side of the control valve II, and a control valve III is arranged on the bypass pipeline I.
3. The semi-dry desulfurization process water conditioning device according to claim 1, characterized in that: the water supply main pipe is provided with a control valve IV and a control valve V on the inlet side and the outlet side of the high-pressure power frequency water pump respectively, the water tank is additionally provided with a water outlet, a water supply branch pipeline is connected between the water outlet and the outlet side of the control valve V, the water supply branch pipeline is provided with a high-pressure power frequency standby water pump, and the water supply branch pipeline is provided with a control valve VI and a control valve VII on the inlet side and the outlet side of the high-pressure power frequency standby water pump respectively.
4. The semi-dry desulfurization process water conditioning device according to claim 1, characterized in that: the inlet pipeline is provided with a control valve VIII on the inlet side of the filter screen valve, a control valve IX on the outlet side of the electric switch valve II, a bypass pipeline II is connected between the inlet side of the control valve VIII and the outlet side of the control valve IX, and a control valve X is arranged on the bypass pipeline II.
5. The semi-dry desulfurization process water conditioning device according to claim 1, characterized in that: and a back-flushing drainage pipeline is arranged on the inlet side of the water inlet pipeline at the control valve VIII and the inlet side of the bypass pipeline II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120830132.2U CN215027541U (en) | 2021-04-22 | 2021-04-22 | Semi-dry desulfurization process water adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120830132.2U CN215027541U (en) | 2021-04-22 | 2021-04-22 | Semi-dry desulfurization process water adjusting device |
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| Publication Number | Publication Date |
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| CN215027541U true CN215027541U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120830132.2U Active CN215027541U (en) | 2021-04-22 | 2021-04-22 | Semi-dry desulfurization process water adjusting device |
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- 2021-04-22 CN CN202120830132.2U patent/CN215027541U/en active Active
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