PH detection device for desulfurization system and desulfurization system

Abstract

The utility model relates to a PH detection device for a desulfurization system, the PH detection device is configured to be used for detecting the PH value of desulfurization slurry in the desulfurization system, the PH detection device comprises an inlet pipeline, an outlet pipeline and a PH detection unit connected between the inlet pipeline and the outlet pipeline, the utility model relates to an inlet line for connection to a pump output line of a circulation pump of a desulfurization system, and an outlet line for connection to a pump input line of the circulation pump, an inlet valve being provided in the inlet line, and an outlet valve being provided in the outlet line. The utility model further relates to a desulfurization system. The desulfurization system comprises a desulfurization device with a circulating pump and the PH detection device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental protection, and more particularly, to a PH detection device for a desulfurization system and a desulfurization system. BACKGROUND

[0002] With the increasing attention of the state to the environmental protection industry, and the gradual popularization of the on-line detection system of pollutant emission, there is a higher requirement for the operation stability and operation efficiency of the desulfurization system. As one of the key parameters of the desulfurization process, the PH value of the desulfurization slurry needs to be maintained within a predetermined range during the operation of the desulfurization system, so as to ensure a stable and efficient desulfurization process. Therefore, the detection accuracy of the pH value of the desulfurization slurry is particularly important.

[0003] At present, the structure of the pH meter determines the installation mode thereof in the desulfurization system. The pH meter can be mainly installed on a pipeline, on the side wall of a tank body, or on the side wall or top of a micro tank body. However, these installation modes expose some problems in actual application. On the one hand, the granular substances possibly contained in the desulfurization slurry, or the great impact force generated due to the too fast flow rate of the slurry, can cause damage to the detection probe or front-end glass bulb of the pH meter. On the other hand, the continuous flow of the slurry causes the front-end glass bulb of the pH meter to be unable to be effectively flushed. With the increase of the operation time, the deposits on the surface of the glass bulb can cause an increase of the measurement error and a decrease of the instrument sensitivity. During the operation of the desulfurization system, if the pH value cannot be reliably detected, not only the automatic control of the system will be affected, but also the desulfurization efficiency can be decreased, and it is difficult to realize the stable and efficient operation of the system.

[0004] CN208537506U discloses a PH detection device for desulfurization, which comprises a PH detection device shell, an inner pipe butterfly valve flap, a PH detection device flow divider, a slurry inlet structure, and a flushing structure. A PH detection device inner pipe is arranged in the PH detection device shell, a reserved hole is arranged on the outer wall of the PH detection device shell, and an inner pipe butterfly valve rod is arranged through the reserved hole so as to fix the inner pipe butterfly valve flap in the PH detection device inner pipe. The inner pipe butterfly valve flap is used for adjusting the flow rate of the slurry filtrate in the pipe. The lower port of the PH detection device flow divider is nested in the upper pipe port of the PH detection device shell. The structure of this PH detection device is relatively complex, and the treatment and flow division of the solution slurry and the flushing water after leaving the PH detection device are not considered.

[0005] CN208188079U discloses a PH measuring device and a desulfurization system, the PH measuring device comprises a flow guide pipe, a PH probe and a pipeline for flowing into slurry; the pipeline is a transverse structure; a closed branch pipe is communicated with the upper end of the pipeline, the PH probe extends into the branch pipe from the upper end of the branch pipe; the outer wall of the flow guide pipe is connected with the branch pipe, the lower end of the flow guide pipe extends into the slurry of the pipeline, and the upper end of the flow guide pipe is opposite to the PH probe, so that the slurry of the pipeline can flow to the measuring part of the PH probe through the flow guide pipe. The PH probe of the PH measuring device is easy to be blocked, and the flushing of the pH meter cannot be realized. Utility model content

[0006] The task of the present application is to provide a PH detection device for a desulfurization system and a desulfurization system, which can overcome at least one defect in the prior art, thereby particularly ensuring reliable detection of the PH value of desulfurization slurry in the desulfurization system.

[0007] The task is solved by a PH detection device for a desulfurization system and a desulfurization system.

[0008] The first aspect of the present application relates to a PH detection device for a desulfurization system, which is configured to detect the PH value of desulfurization slurry in the desulfurization system. Wherein, the PH detection device comprises an inlet pipeline, an outlet pipeline and a PH detection unit connected between the inlet pipeline and the outlet pipeline, wherein the inlet pipeline is configured to be connected to the pump output pipeline of the circulating pump of the desulfurization system, and the outlet pipeline is configured to be connected to the pump input pipeline of the circulating pump, an inlet valve is provided in the inlet pipeline, and an outlet valve is provided in the outlet pipeline.

[0009] According to an embodiment of the present application, the PH detection unit comprises a pH meter and a detection container, the inlet of the detection container is connected with the inlet pipeline, and the outlet of the detection container is connected with the outlet pipeline, and the detection probe of the pH meter extends into the detection container and can contact the liquid in the detection container.

[0010] According to an embodiment of the present application, the outlet of the detection container is located above the inlet of the detection container in the vertical direction, and the detection probe of the pH meter is located between the inlet of the detection container and the outlet of the detection container in the vertical direction.

[0011] According to an embodiment of the present application, a flushing water inlet is provided on the detection container and / or in the inlet pipeline, and a flushing water outlet is provided on the detection container and / or in the outlet pipeline.

[0012] According to an embodiment of the present application, the flushing water inlet is located between the inlet valve and the inlet of the detection container in the inlet pipeline.

[0013] According to an embodiment of the application, the flushing water outlet is located at the bottom of the detection vessel and a flushing water outlet valve is connected to the flushing water outlet, the flushing water outlet being additionally configured for emptying the detection vessel; or the flushing water outlet is located between the outlet of the detection vessel and the at least one outlet valve and a flushing water outlet valve is connected to the flushing water outlet.

[0014] According to an embodiment of the application, a pipe filter is provided in the inlet line downstream of the inlet valve.

[0015] According to an embodiment of the application, at least two inlet valves are provided in the inlet line.

[0016] A second aspect of the application relates to a desulfurization system comprising a desulfurization device with a circulation pump and a PH detection device according to the first aspect of the application.

[0017] According to an embodiment of the application, the desulfurization system comprises a control device connected to the PH detection device for controlling the valves of the PH detection device and for acquiring the detected PH value.

[0018] Further features of the application will become apparent from the drawings and the detailed description of specific embodiments. All features described in the specification and all features of the claims that are presented in dependent claims, as well as features in the claims presenting a combination of features, can be combined with features described in the specification and / or in the claims in other combinations or in the individual state. BRIEF DESCRIPTION OF DRAWINGS

[0019] The various aspects of the application will be better understood in connection with the detailed description of specific embodiments, when read in conjunction with the accompanying drawings, in which:

[0020] Figure 1 Fig. 1 shows a schematic diagram of a PH detection device for a desulfurization system according to an embodiment of the application;

[0021] Figure 2 Fig. 2 shows a schematic diagram of a PH detection device for a desulfurization system according to another embodiment of the application.

[0022] The reference signs are as follows:

[0023] Circulating pump 1, pump input line 2, pump output line 3, flushing water 4, pH meter 5, detection vessel 6, inlet valve 7, inlet valve 8, outlet valve 9, flushing water outlet valve 10, inlet line 11, outlet line 12, pH detection unit 13, pipe filter 14, inlet 15, outlet 16, flushing water inlet 17, flushing water outlet 18, pH detection device 100, desulfurization tower 200. DETAILED DESCRIPTION

[0024] The present application will now be described with reference to the drawings, which illustrate several embodiments of the application. It is to be understood that the application can assume various different embodiments, and that the embodiments described herein are merely by way of example and are not intended to limit the scope of the application. Furthermore, the described embodiments are to be considered in a descriptive sense only and not for purposes of limitation. It is to be further understood that the embodiments disclosed herein can be combined in various ways to provide additional embodiments.

[0025] It is to be understood that the terminology used in the specification is for the purpose of describing specific embodiments and is not intended to limit the application. Unless otherwise defined, all terms (including technical and scientific terms) used in the specification are to be interpreted as is customary in the art. Well-known functions or constructions can not be described in detail for the sake of conciseness and / or clarity.

[0026] As used in the specification, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. As used in the specification, the terms "comprises," "comprising," "includes," "including," and the like mean the presence of the stated feature but do not preclude the presence or addition of one or more other features.

[0027] In the specification, when an element is referred to as being "on," "attached" to, "connected" to, "coupled" to, or "contacting" another element, it can be directly on, attached to, connected to, coupled to, or contacting the other element or one or more intervening elements can also be present.

[0028] In the specification, spatially relative terms such as "upper," "lower," "front," "back," "top," "bottom," and the like can be used for the purpose of explaining the orientation of one feature to another feature in the drawings. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientations depicted in the drawings. For example, if a device is turned over in the drawings, a feature that is described as "below" or "beneath" another feature could then be described as being "above" or "over" the other feature. The device can also be oriented in other ways (rotated 90 degrees or at other orientations) and the relative spatial terms would be interpreted accordingly.

[0029] Figure 1 and Figure 2 A schematic diagram of a PH detection device 100 for a desulphurization system according to different embodiments of the present application is shown. The desulphurization system can exemplarily be an ammonia process desulphurization system, which can be used for removing sulphur dioxide from flue gas, which mainly contains the pollutants sulphur dioxide and carbon dioxide, e.g. from a coal-fired boiler. Implementing the ammonia process desulphurization can result in the by-product ammonium sulphate fertilizer. A main component of the desulphurization system is a desulphurization unit, which can for example comprise a desulphurization tower 200 and a circulation pump 1 for realizing a circulation of desulphurization slurry. The circulation pump 1 can for example draw desulphurization slurry from the desulphurization tower 200 via a pump input line 2 and pump the desulphurization slurry back to the desulphurization tower 200 again via a pump output line 3.

[0030] As Figure 1 and Figure 2 shown, in order to detect the PH value of the desulphurization slurry in the desulphurization system, the PH detection device 100 according to the present application can comprise an inlet line 11, an outlet line 12 and a PH detection unit 13 connected between the inlet line 11 and the outlet line 12. The inlet line 11 of the PH detection device 100 is configured for being connected to the pump output line 3 of the circulation pump 1 and the outlet line 12 of the PH detection device 100 is configured for being connected to the pump input line 2 of the circulation pump 1. That is, the PH detection device 100 can be bypass connected to the circulation pump 1 of the desulphurization system, the desulphurization slurry from the pump output line 3 can be input into the PH detection unit 13 through the inlet line 11 and after leaving the PH detection unit 13 can be merged into the pump input line 2 through the outlet line 12. By bypass connecting the PH detection device 100 to the circulation pump 1 of the desulphurization system, the flow of the desulphurization slurry in the PH detection device 100 can advantageously be realized by means of the differential pressure of the circulation pump 1 itself, so that the PH detection device 100 can detect the PH value of the desulphurization slurry in real time.

[0031] Furthermore, at least one inlet valve 7 is provided in the inlet line 11 and at least one outlet valve 9 is provided in the outlet line 12. By opening or closing the respective inlet and outlet valves, the PH detection device 100 can be easily accessed to the line of the circulation pump 1 for measurement or isolated with respect to the circulation pump 1 for repair, maintenance or flushing.

[0032] In order to effectively realize the circulation of the desulphurization slurry in the desulphurization tower 200, the circulation pump 1 generally has a relatively large head or in other words a relatively large output pressure. On this basis, as Figure 1 and Figure 2As shown, in some embodiments, at least two inlet valves 7 and 8 can advantageously be provided in the inlet pipe 11. These inlet valves 7 and 8 allow for reliable regulation of the flow rate or pressure of the desulfurization slurry in the pH detection unit 13, preventing excessive impact force from damaging the measuring element in the pH detection unit 13. Through the cooperation of these inlet valves 7 and 8, even in the face of higher output pressures from the circulating pump 1, the pressure of the desulfurization slurry can be accurately adjusted, or the pH detection device 100 can be smoothly connected to or isolated from the circulating pump 1.

[0033] like Figure 1 and Figure 2 As shown, in some embodiments, to reduce the entry of particles from the slurry into the pH detection unit 13 (which could damage the measuring elements in the pH detection unit 13 or affect the detection results), a pipeline filter 14 can be installed in the inlet pipe 11, particularly downstream of at least one of the two inlet valves 7 and 8. Figure 1 In the illustrated embodiment, the pipeline filter 14 can be positioned between the downstream inlet valve 8 and the pH detection unit 13. Figure 2 In the illustrated embodiment, the pipeline filter 14 can be disposed between the two inlet valves 7 and 8. By disposing of the pipeline filter 14, the risk of solid matter in the desulfurization slurry damaging the measuring element in the pH detection unit 13 can be reduced, and the accumulation of solid matter on the measuring element can be reduced, thus maintaining the sensitivity of the measuring element for as long as possible.

[0034] In some embodiments, such as Figure 1 and Figure 2 As shown, the pH detection unit 13 may include a pH meter 5 as a measuring element and a detection container 6. The inlet 15 of the detection container 6 may be connected to an inlet pipe 11, and the outlet 16 of the detection container 6 may be connected to an outlet pipe 12. During operation, desulfurization slurry may enter the detection container 6 and at least partially fill its internal space. The detection probe of the pH meter 5, particularly the front glass bulb, may extend into the detection container 6 and come into contact with the liquid, particularly the desulfurization slurry, within the detection container 6. In the embodiment shown, the detection probe of the pH meter 5 may extend from the top of the detection container 6 and remain within it. In other embodiments, it is also possible for the detection probe of the pH meter 5 to extend from the side of the detection container 6.

[0035] exist Figure 1 and Figure 2In the embodiment shown, the detection vessel 6 can have a certain height, for example be configured in the form of a tank. In order to ensure that the detection probe of the pH meter 5 can be brought into sufficient contact with the desulfurization slurry and to achieve a smooth flow process of the desulfurization slurry, the outlet 16 of the detection vessel 6 can be located vertically above the inlet 15 thereof, and the detection probe of the pH meter 5 can be located vertically between the inlet 15 and the outlet 16 of the detection vessel 6.

[0036] Alternatively, in an embodiment not shown, the detection vessel 6 can also have any other suitable geometry. For example, the detection vessel 6 can also be configured in the form of a tube. In this case, the inlet 15 and the outlet 16 of the detection vessel 6 can be located, for example, on two axially opposite end sides thereof, respectively.

[0037] In some embodiments, the pH detection device 100 can comprise a flushing water inlet 17 and a flushing water outlet 18. When flushing is required, the inlet valves 7, 8 and the outlet valve 9 can be manipulated in a targeted manner to shut off the fluid circuit between the pH detection device 100 and the circulation pump 1. Subsequently, flushing water 4 can be introduced by means of the flushing water inlet 17 in order to, for example, clean the detection probe of the pH meter 5 and to maintain the accuracy and sensitivity of the pH detection. The flushing water 4 can be discharged via the flushing water outlet 18. It is understood that, for the correct functioning of the pH detection device 100 and the desulfurization system, the fluid path for the pH detection and the fluid path for the flushing are logically mutually exclusive, i.e. both are not simultaneously conductive. Thereby, a separation of the flushing water and the desulfurization slurry can be achieved. The flushing of the pH detection device 100 does not affect the normal desulfurization operation of the circulation pump 1 and the desulfurization tower 200 or the desulfurization device, respectively.

[0038] In Figure 1 and Figure 2 In the embodiment shown, the flushing water inlet 17 can be provided in the inlet line 11, so that the flushing water 4 can enter the detection vessel 6 directly via the inlet 15 of the detection vessel 6 to which the inlet line 11 is connected. More specifically, the flushing water inlet 17 is located between the inlet valves 7 or 8 and the inlet 15 of the detection vessel 6. In particular as Figure 1 and Figure 2 In the case of at least two inlet valves 7, 8 in the inlet line 11, as shown in the embodiments shown, the flushing water inlet 17 can be located in the inlet line 11 between at least one of the at least two inlet valves 7, 8 and the inlet 15 of the detection vessel 6. That is, there is at least one inlet valve between the flushing water inlet 17 and the pump output line 3 of the circulation pump 1 in order to be able to disconnect the detection vessel 6 from the pump output line 3 by means of the at least one inlet valve. In other embodiments not shown, a separate flushing water inlet can also be provided on the detection vessel 6, for example in the side wall of the detection vessel 6.

[0039] InFigure 1 In the shown embodiment, the flushing water outlet 18 can be located at the bottom of the detection vessel 6 and a flushing water outlet valve 10 can be connected to the flushing water outlet 18. The flushing water outlet valve 10 is closed during the PH detection. During the flushing, the flushing water outlet valve 10 is opened. Here, the flushing water outlet 18 can additionally be configured for emptying the detection vessel 6. If necessary, for example when the desulphurisation system is stopped, the detection vessel 6 can be emptied by means of the flushing water outlet 18. In Figure 2 In the shown embodiment, the flushing water outlet 18 can be located between the outlet 16 of the detection vessel 6 and the outlet valve 9 and a flushing water outlet valve 10 can be connected to the flushing water outlet 18. Here, for emptying the detection vessel 6, the detection vessel 6 can comprise a further emptying port (not shown).

[0040] The application also relates to a desulphurisation system comprising a desulphurisation device with a circulation pump 1 and a PH detection device 100 as described above.

[0041] In some embodiments, for realising the desulphurisation process control, the desulphurisation system can comprise a control device for monitoring and controlling the desulphurisation process. The control device can be connected to the PH detection device 100 for obtaining the PH value detected by the PH detection device. Furthermore, the control device can control the valves of the PH detection device 100, in particular the inlet valves 7, 8, the outlet valve 9 and the flushing water outlet valve 10 (if present) as described above.

[0042] Although the application has been disclosed with reference to the preferred embodiments thereof, it is not intended to limit the application thereto, for it will be apparent that those skilled in the art can make modifications or alterations to the application without departing from the spirit and scope thereof. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the application, without departing from the technical scheme of the application, shall fall within the protection scope of the application.

Claims

1. A PH detection device for a desulfurization system, the PH detection device (100) is configured to detect the PH value of desulfurization slurry in a desulfurization system, characterized in that, The PH detection device comprises an inlet line (11), an outlet line (12) and a PH detection unit (13) connected between the inlet line and the outlet line, wherein the inlet line is configured to be connected to a pump output line (3) of a circulating pump (1) of a desulfurization system, and the outlet line is configured to be connected to a pump input line (2) of the circulating pump, an inlet valve (7) is arranged in the inlet line, and an outlet valve (9) is arranged in the outlet line.

2. The PH detecting device for desulfurization system according to claim 1, wherein, The PH detection unit comprises a PH meter (5) and a detection container (6), an inlet (15) of the detection container is connected to the inlet line, and an outlet (16) of the detection container is connected to the outlet line, a detection probe of the PH meter extends into the detection container and can contact a liquid in the detection container.

3. The PH detecting device for desulfurization system according to claim 2, wherein, The outlet of the detection container is located above the inlet of the detection container in the vertical direction, and the detection probe of the PH meter is located between the inlet of the detection container and the outlet of the detection container in the vertical direction.

4. The PH detecting device for desulfurization system according to claim 2 or 3, characterized in that, A flushing water inlet (17) is arranged on the detection container and / or in the inlet line, and a flushing water outlet (18) is arranged on the detection container and / or in the outlet line.

5. The PH detecting device for desulfurization system according to claim 4, wherein, The flushing water inlet is located between the inlet valve and the inlet of the detection container in the inlet line.

6. The PH detecting device for desulfurization system according to claim 4, wherein, The flushing water outlet is located at the bottom of the detection container, and a flushing water outlet valve (10) is connected to the flushing water outlet, and the flushing water outlet is additionally configured to drain the detection container; or the flushing water outlet is located between the outlet of the detection container and the outlet valve (9), and a flushing water outlet valve is connected to the flushing water outlet.

7. The PH detecting device for desulfurization system according to any one of claims 1 to 3, characterized by, A pipe filter (14) is arranged downstream of the inlet valve in the inlet line.

8. The PH detecting device for desulfurization system according to any one of claims 1 to 3, characterized in that, At least two inlet valves are arranged in the inlet line.

9. A desulfurization system characterized by, The desulfurization system comprises a desulfurization device with a circulating pump and a PH detection device for a desulfurization system according to any one of claims 1 to 8.

10. The desulfurization system according to claim 9, characterized by, The desulfurization system comprises a control device connected with the PH detection device for controlling the valves of the PH detection device and obtaining the detected PH value.

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