CN113578015B - Desulfurizing device - Google Patents

Desulfurizing device Download PDF

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Publication number
CN113578015B
CN113578015B CN202010365427.7A CN202010365427A CN113578015B CN 113578015 B CN113578015 B CN 113578015B CN 202010365427 A CN202010365427 A CN 202010365427A CN 113578015 B CN113578015 B CN 113578015B
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China
Prior art keywords
storage tank
liquid level
reactor
liquid
control valve
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CN202010365427.7A
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CN113578015A (en
Inventor
刘蔷
吴宇
张春阳
高晓根
宋彬
计维安
赵婷
伍坤一
张静迪
陈佳
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Petrochina Co Ltd
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Petrochina Co Ltd
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Priority to CN202010365427.7A priority Critical patent/CN113578015B/en
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    • 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
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • 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
    • B01D53/52—Hydrogen sulfide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
    • C01B17/05—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by wet processes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Gas Separation By Absorption (AREA)
  • Industrial Gases (AREA)

Abstract

The disclosure relates to a desulfurization device, and belongs to the technical field of desulfurization. The desulfurization device comprises a reactor, a filter, a first liquid storage tank, a lifting pump, a water injection device and a communication pipeline. The communicating pipeline comprises a first communicating pipeline, a second communicating pipeline, a third communicating pipeline and a fourth communicating pipeline, the lifting pump is located in the first liquid storage tank, the filter is communicated with the bottom outlet of the reactor through the first communicating pipeline, the first liquid storage tank is communicated with the bottom outlet of the filter through the second communicating pipeline, the lifting pump is communicated with the top inlet of the reactor through the third communicating pipeline, and the water injection device is communicated with the filter through the fourth communicating pipeline. The filter cloth wash water in the filter is stored in the first liquid storage tank, the lift pump injects the filter cloth wash water stored in the first liquid storage tank into the reactor, the sufficient water in the reactor is ensured, the reaction can be completed, the filter cloth wash water is recycled, the resource waste is avoided, and the cost is reduced.

Description

Desulfurizing device
Technical Field
The disclosure relates to the technical field of desulfurization, in particular to a desulfurization device.
Background
The natural gas, acid gas or tail gas produced during the natural gas production process contains hydrogen sulfide (chemical formula: H 2 S). The sulfur element in the natural gas, the acid gas or the tail gas can be used for producing sulfur, and if the sulfur-containing gas is directly discharged, not only is the resource wasted, but also the environment is polluted. The liquid phase oxidation desulfurization process is a desulfurization process commonly used in the related art.
The desulfurizing device of the liquid phase oxidation desulfurizing process comprises: a reactor, a feeding device and a filter. In the liquid phase oxidation desulfurization process, firstly, sulfur-containing gas and oxygen are sent into a reactor, and then, a complex iron solution is injected into the reactor, so that high-valence iron ions (Fe 3+) in the complex iron solution oxidize H 2 S into elemental sulfur, and the elemental sulfur is deposited at the bottom of the reactor to form sulfur slurry. The sulfur slurry is sent to a filter and is uniformly distributed on filter cloth of the filter by a feeding device, so that liquid components in the sulfur slurry are filtered to a filtrate tank through the filter cloth, and sulfur solids are trapped on the filter cloth to form a sulfur filter cake.
In the related art, sulfur particles and the like possibly adhere to the filter cloth in the process of filtering sulfur, so that the filtering effect of the filter cloth is affected, and the filter cloth is required to be washed. However, the residual filter cloth flushing water after flushing contains a large amount of chemical components, and if the chemical components are directly discharged, the environment is polluted, the filter cloth flushing water needs to be treated, and the cost is increased.
Disclosure of Invention
The embodiment of the disclosure provides a desulfurization device, which can recycle filter cloth flushing water, reduce cost, and the technical scheme is as follows:
The disclosure provides a desulfurization device, which comprises a reactor, a filter, a first liquid storage tank, a lift pump, a water injection device and a communication pipeline;
The lifting pump is arranged in the first liquid storage tank, the communicating pipeline comprises a first communicating pipeline, a second communicating pipeline, a third communicating pipeline and a fourth communicating pipeline, the filter is communicated with the bottom outlet of the reactor through the first communicating pipeline, the first liquid storage tank is communicated with the bottom outlet of the filter through the second communicating pipeline, the lifting pump is communicated with the top inlet of the reactor through the third communicating pipeline, and the water injection device is communicated with the filter through the fourth communicating pipeline.
In one implementation of the disclosed embodiments, the desulfurization device further includes a controller, and a first level gauge is disposed in the reactor;
The controller is configured to control the lifting pump to send the liquid in the first liquid storage tank into the reactor when the liquid level detected by the first liquid level gauge is lower than a first liquid level value.
In an implementation manner of the embodiment of the disclosure, a second liquid level meter is further arranged in the first liquid storage tank, the communicating pipeline further comprises a fifth communicating pipeline, and the water injection device is communicated with the reactor through the fifth communicating pipeline;
the controller is configured to control the water injection device to inject water into the reactor when the liquid level detected by the second liquid level gauge is lower than a second liquid level value and the liquid level detected by the first liquid level gauge is lower than the first liquid level value.
In one implementation of the embodiment of the disclosure, the desulfurization device further includes a second liquid storage tank, a first control valve, and a second control valve, and the communication pipeline further includes a sixth communication pipeline;
one end of the sixth communication pipeline is communicated with the top inlet of the second liquid storage tank, and the other end of the sixth communication pipeline is connected to the third communication pipeline;
The first control valve is located on the sixth communication pipeline, the second control valve is located on the third communication pipeline, and the second control valve is located between a connection point of the third communication pipeline and the sixth communication pipeline and the reactor.
In one implementation of the disclosed embodiments, the desulfurization device further includes a third control valve, the communication pipe further includes a seventh communication pipe,
In the vertical direction, the second liquid storage tank is located above the first liquid storage tank, the first liquid storage tank is communicated with the bottom outlet of the second liquid storage tank through the seventh communication pipeline, and the third control valve is located on the seventh communication pipeline.
In one implementation of the embodiment of the disclosure, the desulfurization device further includes a first check valve, where the first check valve is located on the third communication pipe, and the first check valve is located between a connection point of the third communication pipe and the sixth communication pipe and the lift pump;
The first check valve is configured to be in an open state when the lift pump is on and in a closed state when the lift pump is off.
In one implementation of the disclosed embodiments, the desulfurization device further includes a third level gauge, the third level gauge being located within the second liquid storage tank;
The controller is configured to control the lifting pump to send the liquid in the first liquid storage tank into the second liquid storage tank when the liquid level detected by the first liquid level meter is higher than a third liquid level value, the liquid level detected by the second liquid level meter is higher than a fourth liquid level value, and the liquid level detected by the third liquid level meter is lower than a fifth liquid level value, and the third liquid level value is larger than the first liquid level value and the fourth liquid level value is larger than the second liquid level value.
In one implementation of the embodiment of the disclosure, the desulfurization device further includes a fourth control valve and a fifth control valve, one end of the fifth communication pipe is communicated with the top inlet of the reactor, and the other end of the fifth communication pipe is communicated with the fourth communication pipe;
the fourth control valve is located on the fifth communication pipeline, the fifth control valve is located on the fourth communication pipeline, and the fifth control valve is located between the connection position of the fourth communication pipeline and the fifth communication pipeline and the filter.
In one implementation of the embodiment of the disclosure, the desulfurization device further includes a wastewater tank and a sixth control valve, and the communication pipeline further includes the eighth communication pipeline;
the eighth communicating pipeline is respectively communicated with the lifting pump and the sewage tank truck, and the sixth control valve is positioned on the eighth communicating pipeline.
In one implementation of the disclosed embodiments, the desulfurization device further includes a low tank, and the first liquid storage tank is located in the low tank.
The technical scheme provided by the embodiment of the disclosure has the beneficial effects that:
The sulfur-containing gas reacts with oxygen in the reactor to generate sulfur, the sulfur is deposited at the bottom of the reactor in the form of sulfur slurry, flows to the filter through the first communication pipeline, is distributed on filter cloth of the filter, and the sulfur slurry is filtered by the filter cloth. The water injection device injects water into the filter through the fourth communication pipeline and washes the used filter cloth, and filter cloth washing water flows to the first liquid storage tank through the second communication pipeline, and the filter cloth washing water is stored in the first liquid storage tank. The desulfurization of sulfur-containing gases in a reactor requires the participation of water, and as the reaction proceeds, the water in the reactor is evaporated, and the sulfur slurry also brings out part of the water, so that the water in the reactor is reduced. The filter cloth flushing water stored in the first liquid storage tank is fed into the reactor through the lifting pump, so that the reaction can be completed by enough water in the reactor, the filter cloth flushing water is recycled, the environment pollution and the resource waste are avoided, and the cost can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic view of a desulfurizing apparatus according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of a desulfurizing apparatus according to an embodiment of the present disclosure;
Fig. 3 is a block diagram of a desulfurization device provided in an embodiment of the present disclosure.
Detailed Description
For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a desulfurization device according to an embodiment of the present disclosure. Referring to fig. 1, the desulfurization apparatus includes a reactor 1, a filter 2, a first liquid storage tank 3, a lift pump 4, a water injection device 5, and a communication pipe 6. The lifting pump 4 is located in the first liquid storage tank 3, the communicating pipeline 6 comprises a first communicating pipeline 61, a second communicating pipeline 62, a third communicating pipeline 63 and a fourth communicating pipeline 64, the filter 2 is communicated with the bottom outlet of the reactor 1 through the first communicating pipeline 61, the first liquid storage tank 3 is communicated with the bottom outlet of the filter 2 through the second communicating pipeline 62, the lifting pump 4 is communicated with the top inlet of the reactor 1 through the third communicating pipeline 63, and the water injection device 5 is communicated with the reactor 1 of the filter 2 through the fourth communicating pipeline 64.
In this implementation, the sulfur-containing gas reacts with oxygen in the reactor 1 and sulfur is generated, which is deposited in the form of sulfur slurry at the bottom of the reactor 1, flows to the filter 2 through the first communication pipe 61, and is distributed on the filter cloth of the filter 2, which filters the sulfur slurry. The water injection device 5 injects water into the filter 2 through the fourth communication pipe 64 and washes the filter cloth after use, and the filter cloth washing water flows to the first liquid storage tank 3 through the second communication pipe 62, and the filter cloth washing water is stored in the first liquid storage tank 3. The desulfurization of the sulfur-containing gas in the reactor 1 requires the participation of water, and as the reaction proceeds, the water in the reactor 1 is evaporated, and the sulfur slurry also brings out part of the water, so that the water in the reactor 1 is reduced. The filter cloth flushing water stored in the first liquid storage tank 3 is sent into the reactor 1 through the lifting pump 4, so that the reaction can be completed by enough water in the reactor 1, the filter cloth flushing water is recycled, the environment pollution and the resource waste are avoided, and the cost can be reduced.
In the disclosed embodiment, the water injection device 5 injects water into the filter 2, only the used filter cloth is washed, and no reaction is performed. The composition of the flushing water of the filter cloth is the same as the liquid composition of the sulfur pulp. Thus, the injection of the filter cloth flushing water into the reactor 1 does not affect the desulfurization reaction of the sulfur-containing gas in the reactor 1.
In the disclosed embodiment, the water injection means 5 may comprise a water storage tank and a water injection pump which injects water in the water storage tank into the filter 2.
As shown in fig. 1, the reactor 1 has a cylindrical structure, and the reactor 1 includes an inner cylinder 101, an outer cylinder 102, a sulfur-containing gas distributor 103, and an air distributor 104. Wherein the inner cylinder 101 and the outer cylinder 102 are coaxially arranged, and the height of the inner cylinder is lower than that of the outer cylinder 102, so that the inner cylinder 101 and the outer cylinder 102 are communicated, the sulfur-containing gas distributor 103 is positioned in the inner cylinder 101, and the air distributor 104 is positioned in the outer cylinder 102. The sulfur-containing gas is uniformly distributed in the inner cylinder 101 through the sulfur-containing gas distributor 103, and the blower sends air into the air distributor 104 and uniformly distributes the air in the outer cylinder 102 through the air distributor 104. An absorption zone is formed in the inner tube 101, an oxidation zone is formed in the outer tube 102, and water is contained in both the absorption zone and the oxidation zone. The introduced sulfur-containing gas of the absorption zone reacts with the high-valence complex iron solution in the inner cylinder 101 to form elemental sulfur. The higher iron ions (Fe 3+) in the complexed iron solution are reduced to lower iron ions (Fe 2+) forming a stream of the complexed iron solution in a lower valence state. Air is introduced into the oxidation zone, and because the air is difficult to dissolve in water, the air content in the oxidation zone is greater than that in the absorption zone, and because the air content of the liquid in the inner and outer cylinders is different, density difference is generated, the low-valence complex iron solution is pushed to flow to the oxidation zone and reacts with oxygen in the oxidation zone, so that the low-valence iron ions are oxidized into high-valence iron ions, the oxidation performance of the complex iron solution is recovered, and the complex iron solution can be recycled.
In the embodiment of the disclosure, the sulfur slurry is deposited at the bottom of the reactor 1 and has fluidity, the position of the filter 2 is lower than that of the reactor 1, the filter 2 is communicated with the bottom of the reactor 1, and the sulfur slurry can flow on the filter 2 without arranging other lifting devices, so that the cost is saved.
Referring again to fig. 1, the desulfurization apparatus further includes a first valve 21, and the first valve 21 is located on the first communication pipe 61.
In this implementation, when the sulfur slurry processed by the filter 2 is excessive or the filter 2 is damaged, the first valve 21 may be closed so that the sulfur slurry in the reactor 1 cannot flow to the filter 2. After the filter 2 works normally, the first valve 21 is opened to enable the sulfur slurry in the reactor 1 to flow to the filter 2 for filtering treatment.
In the disclosed embodiment, the filter 2 comprises a distributor (not shown in the figure), a filter cloth 201, a flusher (not shown in the figure), a driver 202 and a motor 203, the filter cloth 201 is positioned on the driver 202, and the motor 203 is connected with the driver 202. The distributor evenly distributes sulfur slurry on the filter cloth to ensure the filtering effect. The sulfur slurry is filtered by a filter cloth 201 to form filtrate and a sulfur filter cake, the filtrate can be recycled into the reactor 1 for re-reaction, and the sulfur filter cake is transported out to form sulfur through subsequent treatment. The motor 203 provides mechanical energy for the driver 202 to rotate the driver 202, so as to drive the filter cloth 201 on the driver 202 to rotate, and transport out the sulfur filter cake on the filter cloth 201. Finally, the used filter cloth 201 is rinsed by a rinsing device.
In the embodiment of the disclosure, the filter 2 may further include a vacuum pump and a vacuum box, the adsorption port of the vacuum box is tightly combined with the lower surface of the filter cloth 201, the vacuum pump is communicated with the vacuum box, gas in the vacuum box is pumped out to form negative pressure in the vacuum box, sulfur slurry on the filter cloth is pumped, filtrate in the sulfur slurry flows to the vacuum box, and after the adsorption of the sulfur slurry by the vacuum box is completed, the driver 202 transports out the sulfur filter cake on the filter cloth 201.
As shown in fig. 1, the filter 2 may further comprise a sulfur tank 204, and the sulfur tank 204 may be used for temporary storage of a sulfur filter cake.
In the embodiment of the disclosure, the mass fraction of the sulfur in the sulfur slurry is between 5% and 15%, and the water content of a sulfur filter cake prepared by the filter 2 is less than 35%.
As shown in fig. 1, in the vertical direction a, the first liquid storage tank 3 is located below the filter 2, so that the filter cloth flushing water in the filter 2 can flow to the first liquid storage tank 3 by gravity, an additional lifting device is not required to be arranged, and the cost is saved. Since the first liquid storage tank 3 is located below the filter 2 and the first liquid storage tank 3 is used for storing the filter cloth washing water, the first liquid storage tank 3 may also be called a washing water low tank.
As shown in fig. 1, the second valve 22 is disposed on the second communication pipe 62, and when the liquid level in the first liquid storage tank 3 is too high, the second valve 22 can be closed, so as to avoid the overflow of the liquid in the first liquid storage tank 3.
Fig. 2 is a schematic structural view of a desulfurization device according to an embodiment of the present disclosure. Referring to fig. 2, a first level gauge 8 is arranged within the reactor 1. Fig. 3 is a block diagram of a desulfurization device provided in an embodiment of the present disclosure. Referring to fig. 3, the desulfurization apparatus further includes a controller 7. The controller 7 is electrically connected to the first level gauge 8 and the control end of the lift pump 4, respectively, and the controller 7 is configured to control the lift pump 4 to feed the liquid in the first liquid storage tank 3 into the reactor 1 when the liquid level detected by the first level gauge 8 is lower than the first liquid level value.
In this implementation, a first level gauge 8 is arranged in the reactor 1, the level of the liquid in the reactor 1 can be monitored. When the liquid level in the reactor 1 is lower than the first liquid level value, the first liquid level meter 8 provides an electric signal for the controller 7, the controller 7 controls the lifting pump 4 to be opened, and the filter cloth flushing water stored in the first liquid storage tank 3 is injected into the reactor 1 through the lifting pump 4, so that the amount of liquid in the reactor 1 is increased, and the normal reaction can be ensured.
Referring again to fig. 2, a second liquid level gauge 9 is further disposed in the first liquid storage tank 3, and the communicating pipe 6 further includes a fifth communicating pipe 65, through which the water injection device 5 communicates with the reactor 1. Referring again to fig. 3, the controller 7 is electrically connected to the water injection means 5 and the second level gauge 9, respectively. And a controller 7 configured to control the water injection device 5 to inject water into the reactor 1 when the liquid level detected by the second liquid level gauge 9 is lower than the second liquid level value and the liquid level detected by the first liquid level gauge 8 is lower than the first liquid level value.
In this implementation, a second level gauge 9 is arranged in the first tank 3, which allows to monitor the level of the liquid in the first tank 3. When the level of liquid in the reactor 1 is below the first level value, which means that less water is present in the reactor 1, water needs to be injected into the reactor 1, and if the level in the first liquid storage tank 3 is below the second level value at this time, which means that the amount of flushing water of the filter cloth stored in the first liquid storage tank 3 is too small, which may damage the lift pump 4 if the lift pump 4 is turned on. At this time, the controller 7 may control the water injection device 5 to inject water into the reactor 1 through the water injection device 5, thereby increasing the amount of the liquid in the reactor 1 and ensuring that the reaction can be performed normally.
Referring again to fig. 2, the desulfurization apparatus further includes a second reservoir tank 10, a first control valve 11, and a second control valve 12, and the communication pipe 6 further includes a sixth communication pipe 66. One end of the sixth communication pipe 66 is communicated with the top inlet of the second liquid storage tank 10, and the other end of the sixth communication pipe 66 is connected to the third communication pipe 63. The first control valve 11 is located on the sixth communication pipe 66, and the second control valve 12 is located on the third communication pipe 63 between the connection point of the third communication pipe 63 and the sixth communication pipe 66 and the reactor 1.
In this implementation, when the liquid level in the reactor 1 is higher than the third liquid level value and the liquid level in the first liquid storage tank 3 is higher than the fourth liquid level value, the liquid in the first liquid storage tank 3 can be sent to the second liquid storage tank 10 by the lift pump 4 for storage, so that the liquid in the reactor 1 and the first liquid storage tank 3 is prevented from being excessively high, and the liquid in the reactor 1 and the first liquid storage tank 3 overflows.
For example, when it is desired to transfer liquid into the second tank 10, the second control valve 12 may be closed and the first control valve 11 opened, allowing the lift pump 4 to only transfer liquid from the first tank 3 into the second tank 10. When it is desired to feed liquid into the reactor 1, the first control valve 11 may be closed and the second control valve 12 opened, so that the lift pump 4 can only feed liquid from the first liquid reservoir 3 into the reactor 1.
The first control valve 11 and the second control valve 12 may be either manual control valves or electric control valves, for example.
As shown in fig. 3, a third valve 23 is further disposed on the third communication pipe 63, and the flow of the liquid in the third communication pipe 63 is controlled by the second control valve 12 and the third valve 23 together, so that the control can be performed through the second valve in case that one of the valves is damaged, thereby being safer.
A fourth valve 24 may also be disposed on the sixth communication conduit 66, which functions similarly to the third valve 23 described above, to ensure safer control.
Referring again to fig. 2, the desulfurization apparatus further includes a third control valve 13, the communication pipe 6 further includes a seventh communication pipe 67, the second liquid storage tank 10 is located above the first liquid storage tank 3 in the vertical direction, the first liquid storage tank 3 communicates with the bottom outlet of the second liquid storage tank 10 through the seventh communication pipe 67, and the third control valve 13 is located on the seventh communication pipe 67.
In this implementation, the bottom of the second liquid storage tank 10 is communicated with the first liquid storage tank 3 through a seventh communication pipe 67, and a third control valve 13 is arranged on the seventh communication pipe 67, and when the liquid level in the first liquid storage tank 3 is low, the third control valve 13 can be opened, so that the stored filter cloth flushing water in the second liquid storage tank 10 flows into the first liquid storage tank 3 by gravity.
As shown in fig. 1, a fifth valve 25 may be further disposed on the seventh communication pipe 67, and the flow of the liquid in the seventh communication pipe 67 is controlled more safely by the third control valve 13 and the fifth valve 25 together.
Referring again to fig. 3, the first control valve 11, the second control valve 12 and the third control valve 13 are all electrically controlled valves, and the first control valve 11, the second control valve 12 and the third control valve 13 are all electrically connected with the controller 7.
In this implementation manner, the controller 7 is electrically connected with the first control valve 11, the second control valve 12 and the third control valve 13, and the controller 7 can control the opening and closing of the first control valve 11, the second control valve 12 and the third control valve 13, so as to ensure the effectiveness and timeliness of control.
Referring again to fig. 2, the desulfurization apparatus further includes a first check valve 14, the first check valve 14 being located on the third communication pipe 63 between the connection point of the third communication pipe 63 and the sixth communication pipe 66 and the lift pump 4. The first one-way valve 14 is configured to be in an open state when the lift pump 4 is on and in a closed state when the lift pump 4 is off.
In this embodiment, the first non-return valve 14 is in an open state when the lift pump 4 is in operation, in which case liquid in the first liquid reservoir 3 can be fed by the lift pump 4 into the second liquid reservoir 10 or into the reactor 1. When the lift pump 4 is closed, the first one-way valve 14 is in a closed state, so that liquid in the reactor 1 or the second liquid storage tank 10 is prevented from flowing back into the first liquid storage tank 3 due to excessive pressure in the reactor 1 or the second liquid storage tank 10.
As shown in fig. 1, the desulfurization apparatus may further include a reducing joint 26, the reducing joint 26 being located between the third communication pipe 63 and the outlet of the lift pump 4.
In this embodiment, the reducing joint 26 is provided, and the third communication pipe 63 having a larger diameter can be connected to the reducing joint 26, so that more liquid can flow through the third communication pipe 63, and a sufficient amount of liquid can be supplied to the sixth communication pipe 66.
As shown in fig. 1, the desulfurization apparatus may further include a pressure gauge 27, the pressure gauge 27 being located on the third communication pipe 63 between the point of connection of the third communication pipe 63 to the sixth communication pipe 66 and the reducing joint 26.
The pressure gauge 27 can detect the pressure in the third communication pipe 63, avoiding the pressure in the third communication pipe 63 from being excessively large, causing the third communication pipe 63 to be damaged.
Referring again to fig. 2, the desulfurization apparatus further includes a third level gauge 15, the third level gauge 15 being located within the second reservoir 10. Referring again to fig. 3, a third level gauge 15 is electrically connected to the controller 7. The controller 7 is configured to control the lift pump 4 to send the liquid in the first liquid storage tank 3 into the second liquid storage tank 10 when the liquid level detected by the first liquid level meter 8 is higher than a third liquid level value, the liquid level detected by the second liquid level meter 9 is higher than a fourth liquid level value, and the liquid level detected by the third liquid level meter 15 is lower than a fifth liquid level value, wherein the third liquid level value is higher than the first liquid level value, and the fourth liquid level value is higher than the second liquid level value.
In this embodiment, a third level gauge 15 is arranged in the second tank 10, by means of which third level gauge 15 the level of the liquid in the second tank 10 can be monitored. The liquid level in the first liquid storage tank 3 is higher than the fourth liquid level value, and the liquid level in the reactor 1 is higher than the third liquid level value, which means that the liquid in the first liquid storage tank 3 and the liquid in the reactor 1 are more at the moment, and the liquid does not need to be injected into the reactor 1. If the liquid level in the second liquid storage tank 10 is lower than the fifth liquid level value at this time, the controller 7 may control the lift pump 4 to feed the liquid in the first liquid storage tank 3 into the second liquid storage tank 10, avoiding overflow of the liquid in the first liquid storage tank 3.
Illustratively, the first, second and third liquid level gauges 8, 9 and 15 are electronic liquid level gauges, and may send electrical signals to the controller 7.
Referring again to fig. 2, the desulfurization apparatus further includes a fourth control valve 16 and a fifth control valve 17, one end of the fifth communication pipe 65 is communicated with the top inlet of the reactor 1, the other end of the fifth communication pipe 65 is communicated with the fourth communication pipe 64, the fourth control valve 16 is located on the fifth communication pipe 65, and the fifth control valve 17 is located on the fourth communication pipe 64 and between the junction of the fourth communication pipe 64 and the fifth communication pipe 65 and the filter 2.
In this embodiment, the fourth control valve 16 is disposed on the fifth communication pipe 65, and the fifth control valve 17 is disposed on the fourth communication pipe 64, and the flow direction of the water injected from the water injection device 5 can be controlled by the switching of the fourth control valve 16 and the fifth control valve 17.
Illustratively, when water injection is required in the reactor 1, but the filter cloth rinse water stored in both the first and second liquid storage tanks 3, 10 is insufficient, and additional makeup water is not required for the filter 2, the fourth control valve 16 is opened and the fifth control valve 17 is closed, so that the water injection device 5 injects water into the reactor 1, but not into the filter 2. Likewise, when no water needs to be injected into the reactor 1 and additional make-up water is needed for the filter 2, the fourth control valve 16 is closed and the fifth control valve 17 is opened, so that the water injection means 5 injects water into the filter 2 but not into the reactor 1. It is of course also possible to open both the fourth control valve 16 and the fifth control valve 17 and to inject water into the reactor 1 and the filter 2.
Referring again to fig. 2, the fourth control valve 16 and the fifth control valve 17 are electrically controlled valves, and the fourth control valve 16 and the fifth control valve 17 are electrically connected to the controller 7.
In this implementation, the fourth control valve 16 and the fifth control valve 17 are controlled by electric signals, so that the effectiveness and timeliness of the control are ensured.
Referring again to fig. 2, the desulfurization device may also include a second one-way valve 28. The second one-way valve 28 is located between the reactor 1 and the junction of the fourth communication pipe 64 and the fifth communication pipe 65.
In this implementation, a second one-way valve 28 is arranged between the water injection means 5 and the reactor 1, so that water will only flow from the water injection means 5 to the reactor 1, and liquid will not flow from the reactor 1 to the water injection means 5 when the pressure in the reactor 1 is too high.
As shown in fig. 1, a flange 29 is further disposed on the fifth communication pipe 65. In this embodiment, the side wall of the reactor 1 has an opening, a pipe is welded at the opening, and the fifth communication pipe 65 is communicated with the welded pipe through the flange 29, so that the fifth communication pipe 65 is communicated with the reactor 1.
The third communication pipe 63 and the first communication pipe 61 may also be in communication with the reactor 1 in the same manner, for example.
As shown in fig. 1, the fourth communication conduit 64 may also be provided with a sixth valve 30, the sixth valve 30 being located between the junction of the fourth communication conduit 64 and the fifth communication conduit 65 and the water injection device 5.
In this implementation, in case of failure of the fourth and fifth control valves 16 and 17, the flow of liquid in the fourth and fifth communication pipes 64 and 65 may be controlled by the sixth valve 30.
Referring again to fig. 2, the desulfurization apparatus further includes a sewage tank truck 18 and a sixth control valve 19, and the communication pipe 6 further includes an eighth communication pipe 68. The eighth communication line 68 communicates with the lift pump 4 and the sewage tank truck 18, respectively, and the sixth control valve 19 is located on the eighth communication line 68.
In this implementation, by arranging the sewage tank truck 18, when the liquid levels of the liquid in the reactor 1, the first liquid storage tank 3 and the second liquid storage tank 10 are all too high, the filter cloth flushing water in the first liquid storage tank 3 can be conveyed to the sewage tank truck 18 for treatment and discharge by the lift pump 4.
Illustratively, the tank truck 18 may deliver the wastewater to a wastewater treatment plant, which may treat the wastewater prior to discharge to avoid environmental pollution.
Although the desulfurization device disclosed by the invention is provided with the sewage tank truck 18, and the sewage is discharged after being treated later, the desulfurization device disclosed by the invention can recycle part of filter cloth flushing water, so that the amount of sewage treated by a sewage treatment plant is reduced, and the cost can be saved as well.
As shown in fig. 1, the eighth communication pipe 68 may communicate with the third communication pipe 63, thereby communicating with the lift pump 4. The sixth control valve 19 is located between the connection of the eighth communication line 68 to the third communication line 63 and the sewage tank truck 18.
Referring again to fig. 3, the sixth control valve 19 is an electrically controlled valve, and the sixth control valve 19 is electrically connected to the controller 7.
In this implementation, the effectiveness and timeliness of the control are ensured by the controller 7 electrically controlling the sixth control valve 19.
Referring again to fig. 2, the desulfurization apparatus further includes a lower tank 20, and the first liquid storage tank 3 is located in the lower tank 20.
In this implementation, the low tank 20 is provided, and when the liquid level in the first liquid storage tank 3 is too high and the liquid in the first liquid storage tank 3 is not filled into the second liquid storage tank 10, the reactor 1 or the sewage tank truck 18, the liquid in the first liquid storage tank 3 can flow into the low tank 20, so that the liquid in the first liquid storage tank 3 is prevented from flowing to the ground to pollute the environment.
In the disclosed embodiment, the low tank 20 is used during accident conditions, and the low tank 20 may be used to temporarily store liquid to avoid the liquid flowing to the ground and polluting the environment.
In the embodiment of the disclosure, a hydrogen sulfide alarm can be further arranged in the low-level tank 20, and when the concentration of hydrogen sulfide in the liquid in the low-level tank 20 exceeds the standard, an early warning sound is emitted, so that a worker is prevented from being reminded of being far away, and the poisoning of the worker caused by the overhigh concentration of hydrogen sulfide is avoided.
As shown in fig. 1, the bottom of the first liquid storage tank 3 may flow into the groove 2001 of the lower tank 20 through the ninth communication pipe 69, and when the first liquid storage tank 3 is overhauled, the liquid in the first liquid storage tank 3 may be drained through the ninth communication pipe 69, so that the overhauling is convenient.
Illustratively, the seventh valve 31 is disposed on the ninth communication pipe 69, and when the first liquid storage tank 3 needs to be overhauled, the seventh valve 31 is opened to enable the liquid in the first liquid storage tank 3 to flow out, and when the first liquid storage tank is in normal operation, the seventh valve 31 is in a closed state.
In the related art, when the amount of the latent sulfur of the disengaging device is 1 ton per day (t/d), the amount of water needed to be supplemented into the reactor is 10 cubic meters per day (m 3/d), after the desulfurizing device is adopted, the water supplementing operation is carried out according to the liquid level in the reactor 1, and the filtering cloth flushing water is preferentially used for supplementing water, so that the amount of the supplemented water can be reduced, the external discharge amount of the filtering cloth flushing water is reduced, and the desulfurizing device can be used for a water source tension area and a sewage treatment difficulty area without manual operation.
Eight working conditions of the desulfurization apparatus of the present disclosure are explained below in conjunction with the desulfurization apparatus of the present disclosure:
working condition one: the first liquid storage tank 3 cannot supply a sufficient amount of filter cloth washing water.
When the first liquid storage tank 3 cannot supply sufficient filter cloth washing water to the reactor 1, the second liquid storage tank 10 cannot supplement the filter cloth washing water to the first liquid storage tank 3, and the reactor 1 needs to be supplemented with washing water, the water injection device 5 is started, the fourth control valve 16 is opened, and water is supplemented to the reactor 1 through the water injection device 5.
Working condition II: the liquid level in the reactor 1 is low.
When the first level gauge 8 measures that the liquid level of the reactor 1 is equal to or lower than a liquid level Low limit alarm (English: LEVEL ALARM Low, abbreviated as LAL) set value (namely a first liquid level value), the second control valve 12 is opened, the first control valve 11 and the sixth control valve 19 are closed, and meanwhile, the lifting pump 4 is started to inject filter cloth flushing water in the first liquid storage tank 3 into the reactor 1. Wherein LAL represents the lower level limit of the reactor 1.
And (3) working condition III: the liquid level in the reactor 1 is high.
When the first level gauge 8 measures that the liquid level of the reactor 1 is equal to or higher than a liquid level high limit alarm (English: LEVEL ALARM HIGH, abbreviated as LAH) set value (namely a third liquid level value), the second control valve 12 and the sixth control valve 19 are closed, and the first control valve 11 is opened. Excess filter cloth rinse water is fed into the second reservoir 10 for temporary storage. Wherein LAH represents the upper level limit of the reactor 1.
And (4) working condition four: the liquid level of the first liquid storage tank 3 is low.
When the second liquid level meter 9 measures that the liquid level of the first liquid storage tank 3 is equal to or lower than a liquid level Low limit alarm (English: LEVEL ALARM Low, abbreviated as: LALL) set value (namely a second liquid level value), the third control valve 13 is opened, so that the liquid in the second liquid storage tank 10 flows to the first liquid storage tank 3. Wherein LALL denotes the low level limit of the first tank 3.
Working condition five: the first liquid storage tank 3 has a lower liquid level and the reactor 1 does not need to be supplemented with water.
When the second level gauge 9 measures that the liquid level of the first liquid storage tank 3 is equal to or lower than the second liquid level value, the lift pump 4 is shut down.
Working condition six: the liquid level of the first liquid storage tank 3 is higher.
When the second liquid level meter 9 measures that the liquid level of the first liquid storage tank 3 is equal to or higher than a liquid level high limit alarm (English: LEVEL ALARM HIGH HIGH, abbreviated as: LAHH) set value (namely a fourth liquid level value), the third control valve 13 is closed. Wherein LAHH denotes the liquid level upper limit of the first liquid storage tank 3.
Working condition seven: the first liquid storage tank 3 has high liquid level, and the reactor 1 does not need water replenishing.
When the second level gauge 9 measures that the liquid level of the first liquid storage tank 3 is equal to or higher than the fourth liquid level value, the lift pump 4 is started, the third control valve 13 is closed, and if the first control valve 11 is closed, the second control valve 12 is opened.
Working condition eight: the second fluid reservoir 10 has a higher level.
The sixth control valve 19 is opened, the first control valve 11, the second control valve 12 and the third control valve 13 are closed, the lifting pump 4 is started, and the filter cloth flushing water in the first liquid storage tank 3 is transported to the outside of the sewage tank truck 18.
The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.

Claims (6)

1. The desulfurization device is characterized by comprising a reactor (1), a filter (2), a first liquid storage tank (3), a lifting pump (4), a water injection device (5), a controller (7), a second liquid storage tank (10), a first control valve (11), a second control valve (12), a first one-way valve (14), a second one-way valve (28) and a communicating pipeline (6);
The lifting pump (4) is positioned in the first liquid storage tank (3), the communicating pipe (6) comprises a first communicating pipe (61), a second communicating pipe (62), a third communicating pipe (63), a fifth communicating pipe (65), a sixth communicating pipe (66) and a fourth communicating pipe (64), the filter (2) is communicated with the bottom outlet of the reactor (1) through the first communicating pipe (61), the first liquid storage tank (3) is communicated with the bottom outlet of the filter (2) through the second communicating pipe (62), the lifting pump (4) is communicated with the top inlet of the reactor (1) through the third communicating pipe (63), the water injection device (5) is communicated with the filter (2) through the fourth communicating pipe (64), the water injection device (5) is communicated with the reactor (1) through the fifth communicating pipe (65), the sixth communicating pipe (66) is communicated with the top inlet of the sixth communicating pipe (66) at the other end of the third communicating pipe (66);
A first liquid level meter (8) is arranged in the reactor (1), and a second liquid level meter (9) is arranged in the first liquid storage tank (3);
The controller (7) is configured to control the lifting pump (4) to feed the liquid in the first liquid storage tank (3) into the reactor (1) when the liquid level detected by the first liquid level meter (8) is lower than a first liquid level value, and control the water injection device (5) to inject water into the reactor (1) when the liquid level detected by the second liquid level meter (9) is lower than a second liquid level value and the liquid level detected by the first liquid level meter (8) is lower than the first liquid level value;
The first control valve (11) is located on the sixth communication pipeline (66), the second control valve (12) is located on the third communication pipeline (63), the second control valve (12) is located between a connection point of the third communication pipeline (63) and the sixth communication pipeline (66) and the reactor (1), the first one-way valve (14) is located on the third communication pipeline (63), the first one-way valve (14) is located between a connection point of the third communication pipeline (63) and the sixth communication pipeline (66) and the lift pump (4), and the second one-way valve (28) is located between a connection point of the fourth communication pipeline (64) and the fifth communication pipeline (65) and the reactor (1);
The first one-way valve (14) is configured to be in an open state when the lift pump (4) is on and in a closed state when the lift pump (4) is off.
2. The desulfurization device according to claim 1, characterized in that it further comprises a third control valve (13), said communication conduit (6) further comprising a seventh communication conduit (67),
In the vertical direction (a), the second liquid storage tank (10) is located above the first liquid storage tank (3), the first liquid storage tank (3) is communicated with a bottom outlet of the second liquid storage tank (10) through the seventh communication pipeline (67), and the third control valve (13) is located on the seventh communication pipeline (67).
3. The desulphurisation device according to claim 1, characterized in that it further comprises a third gauge (15), said third gauge (15) being located inside said second tank (10);
The controller (7) is configured to control the lifting pump (4) to send the liquid in the first liquid storage tank (3) into the second liquid storage tank (10) when the liquid level detected by the first liquid level meter (8) is higher than a third liquid level value, the liquid level detected by the second liquid level meter (9) is higher than a fourth liquid level value, and the liquid level detected by the third liquid level meter (15) is lower than a fifth liquid level value, wherein the third liquid level value is larger than the first liquid level value, and the fourth liquid level value is larger than the second liquid level value.
4. A desulphurisation device according to any one of claims 1 to 3, further comprising a fourth control valve (16) and a fifth control valve (17), one end of the fifth communication conduit (65) being in communication with the top inlet of the reactor (1), the other end of the fifth communication conduit (65) being in communication with the fourth communication conduit (64);
The fourth control valve (16) is located on the fifth communication pipeline (65), the fifth control valve (17) is located on the fourth communication pipeline (64), and the fifth control valve (17) is located between the connection part of the fourth communication pipeline (64) and the fifth communication pipeline (65) and the filter (2).
5. A desulphurisation device according to any one of claims 1 to 3, further comprising a sewage tank truck (18) and a sixth control valve (19), the communication conduit (6) further comprising an eighth communication conduit (68);
The eighth communication pipeline (68) is respectively communicated with the lifting pump (4) and the sewage tank truck (18), and the sixth control valve (19) is positioned on the eighth communication pipeline (68).
6. A desulphurisation device according to any one of claims 1 to 3, further comprising a lower tank (20), the first liquid storage tank (3) being located in the lower tank (20).
CN202010365427.7A 2020-04-30 2020-04-30 Desulfurizing device Active CN113578015B (en)

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JPH1190172A (en) * 1997-09-24 1999-04-06 Chiyoda Corp Control method and controller for absorbing liquid level in flue gas desulfurizer
CN1221645A (en) * 1997-08-25 1999-07-07 三菱重工业株式会社 Liquid bleeding device and method for controlling concentration of slurry in wet flue gas desulfurization system
CN205517191U (en) * 2016-01-27 2016-08-31 中国石油天然气股份有限公司 Carry out desulfurated device to sulfurous gas
CN108219858A (en) * 2018-02-22 2018-06-29 中冶焦耐(大连)工程技术有限公司 A kind of doctor solution medicine system and method for fine purification technique for coke oven gas
CN109045813A (en) * 2018-08-08 2018-12-21 中国石油化工股份有限公司 A kind of vacuum belt filter ELUTION METHOD
CN209108933U (en) * 2018-09-27 2019-07-16 北京国电龙源环保工程有限公司 Limestone-gypsum Wet Flue Gas Desulfurization Process slurries processing system
CN209475983U (en) * 2019-01-21 2019-10-11 山东科达环境工程有限公司 A kind of liquid level and density regulating apparatus of desulfurization slurry

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1221645A (en) * 1997-08-25 1999-07-07 三菱重工业株式会社 Liquid bleeding device and method for controlling concentration of slurry in wet flue gas desulfurization system
JPH1190172A (en) * 1997-09-24 1999-04-06 Chiyoda Corp Control method and controller for absorbing liquid level in flue gas desulfurizer
CN205517191U (en) * 2016-01-27 2016-08-31 中国石油天然气股份有限公司 Carry out desulfurated device to sulfurous gas
CN108219858A (en) * 2018-02-22 2018-06-29 中冶焦耐(大连)工程技术有限公司 A kind of doctor solution medicine system and method for fine purification technique for coke oven gas
CN109045813A (en) * 2018-08-08 2018-12-21 中国石油化工股份有限公司 A kind of vacuum belt filter ELUTION METHOD
CN209108933U (en) * 2018-09-27 2019-07-16 北京国电龙源环保工程有限公司 Limestone-gypsum Wet Flue Gas Desulfurization Process slurries processing system
CN209475983U (en) * 2019-01-21 2019-10-11 山东科达环境工程有限公司 A kind of liquid level and density regulating apparatus of desulfurization slurry

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