Flushing device for pipeline

Abstract

The utility model discloses a flushing device for a pipeline, which relates to the technical field of pipeline cleaning and comprises a flushing pipeline, two ends of the flushing pipeline are communicated with an air outlet pipeline, the air outlet pipeline is sequentially provided with a first pressure measuring point and a second pressure measuring point along the length direction of the pipeline, and the first pressure measuring point and the second pressure measuring point are positioned on the inner sides of the two ends of the flushing pipeline. The part, located between the first pressure measuring point and the second pressure measuring point, of the air outlet pipeline forms a to-be-cleaned pipeline. The flushing device further comprises two sets of filtering pieces arranged on the flushing pipeline, the two sets of filtering pieces are arranged in parallel, and one of the two sets of filtering pieces is selected to be connected to the flushing pipeline. Through the arrangement of the flushing pipeline, the pressure difference between the first pressure measuring point and the second pressure measuring point on the air outlet pipeline can be used as a standard for judging whether flushing work is carried out or not, and when the pressure difference between the first pressure measuring point and the second pressure measuring point is large, the flushing pipeline can be used for flushing the interior of the air outlet pipeline.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline cleaning technical field, concretely relates to a flushing device for pipeline. BACKGROUND

[0002] In urea production, ammonia and carbon dioxide are synthesized to form methylamine in a high-pressure system, and methylamine is dehydrated to form urea, because the reaction in the high-pressure system is incomplete, further decomposition is needed in a low-pressure system, urea from the high-pressure system enters a rectifying tower for heating and decomposition, ammonia and carbon dioxide after decomposition enter a low-pressure methylamine condenser and are absorbed by ammonia water, the mixed liquid after absorption enters a liquid level tank, and ammonia and carbon dioxide not absorbed enter an atmospheric absorption tower through a gas outlet pipeline for further absorption, because ammonia and carbon dioxide are together and easy to react to form ammonium carbide crystals, therefore, after a long time of work, the gas outlet pipeline is easy to be blocked by ammonium carbide crystals formed, so that the amount of ammonia and carbon dioxide transported by the gas outlet pipeline per unit time is reduced, thereby causing the low-pressure methylamine condenser to be over-pressured.

[0003] To ensure the safe operation of the low-pressure methylamine condenser, the gas outlet pipeline needs to be washed at irregular intervals, the cycle of the washing work is generally determined by the production situation or the maintenance schedule of the staff, that is, the washing method relies on the experience of the staff, so the accuracy is poor. At the same time, in the process of cleaning the gas outlet pipeline, if quartz sand is added to the cleaning liquid to deeply clean the crystals attached to the inner wall of the pipeline, the crystals and the quartz sand will be mixed together at the tail end of the flushing, and subsequent separation operation is needed, which is inconvenient to use.

[0004] Therefore, we propose a flushing device for pipeline to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at: in order to solve the problem in the prior art, and propose a flushing device for pipeline, the flushing device is obtained by setting pressure measuring point at two places of gas outlet pipeline, and the pressure of the two places is obtained, if the pressure difference of the two places is too large, it indicates that the pipeline section between the two pressure measuring points is blocked, and needs to be washed in time, the blockage information feedback is accurate, and the flushing device can also separate quartz sand and crystals in the flushing process.

[0006] To solve the above problems, the utility model provides the following technical scheme:

[0007] The utility model provides a flushing device for pipeline, including flushing pipeline both ends all are connected with the outtake pipeline, and the outtake pipeline is equipped with first pressure point and second pressure point along the pipeline length direction in proper order, and first pressure point and second pressure point are all located the inside of flushing pipeline both ends, and the part of outtake pipeline between first pressure point and second pressure point constitutes the pipeline to be cleaned, and the flushing device still includes two groups of filter pieces set up on flushing pipeline, and two groups of filter pieces are in parallel state arrangement, and two groups of filter pieces are alternatively connected on flushing pipeline.

[0008] As a further scheme of the utility model: first pressure point and second pressure point are provided with first pressure measuring piece and second pressure measuring piece respectively.

[0009] As a further scheme of the utility model: a part of flushing pipeline is composed of parallel first pipeline and second pipeline, and two groups of filter pieces are arranged on first pipeline and second pipeline respectively, and control valve is arranged on first pipeline and second pipeline.

[0010] As a further scheme of the utility model: filter piece includes the box body connected on first pipeline or second pipeline, and filter screen is arranged in the box body, and the aperture of filter screen on first pipeline is larger than the aperture size of filter screen on second pipeline.

[0011] As a further scheme of the utility model: driving source is connected on flushing pipeline.

[0012] As a further scheme of the utility model: first pressure measuring piece and second pressure measuring piece are pressure gauge.

[0013] As a further scheme of the utility model: driving source is water pump.

[0014] As a further scheme of the utility model: first on-off valve is arranged on both ends of flushing pipeline.

[0015] As a further scheme of the utility model: second on-off valve is arranged on both ends of the pipeline to be cleaned.

[0016] Compared with prior art, the utility model has the following beneficial effects:

[0017] 1, through the setting of flushing pipeline, the pressure difference at first pressure point and second pressure point on outtake pipeline can be used as the judging standard of whether flushing work is carried out, when the pressure of two places produces greater difference, can utilize flushing pipeline to carry out flushing treatment to the inside of outtake pipeline, compared with the judging mode of whether flushing work is carried out in prior art by the experience of staff, the judging mode of the utility model is more accurate, can accurately feedback the jam information.

[0018] 2. With the setting of two sets of filter elements, the two sets of filter elements can block and temporarily store large-volume insoluble crystals and quartz sand in turn during the rinsing process. The two are blocked and temporarily stored independently, and the two sets of filter elements can be easily removed for cleaning later. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the filter element in this utility model.

[0022] In the diagram: 1. Flushing pipe; 101. First pipe; 102. Second pipe; 2. First pressure measuring element; 3. Second pressure measuring element; 4. Drive source; 5. Filter element; 501. Housing; 502. Filter screen; 6. Control valve; 7. First on / off valve; 8. Second on / off valve; a. Gas outlet pipe; b. Low-pressure ammonium carbamate condenser; c. Atmospheric pressure absorption tower. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 As shown, the low-pressure ammonium carbamate condenser b is connected to the atmospheric pressure absorption tower c via an outlet pipe a. The outlet pipe a is used to transport the unabsorbed ammonia and carbon dioxide in the low-pressure ammonium carbamate condenser b to the atmospheric pressure absorption tower c for absorption. The flushing device in this invention is used to flush and clean the ammonium bicarbonate crystals formed in the outlet pipe a.

[0025] Example 1:

[0026] like Figures 1-2As shown, a flushing device for pipeline, including first pressure point and second pressure point which are sequentially arranged on the air outlet pipeline a along the length direction of the pipeline, the first pressure point and the second pressure point can be arranged at the position close to the two ports of the air outlet pipeline a, the part between the first pressure point and the second pressure point on the air outlet pipeline a constitutes the pipeline to be cleaned, the two ends of the pipeline to be cleaned are provided with the second on-off valve 8; the utility model also includes flushing pipeline 1, the two ends of flushing pipeline 1 are provided with the first on-off valve 7, the two ends of flushing pipeline 1 are communicated with the two ends of the pipeline to be cleaned respectively, in the normal working process of the air outlet pipeline a, the second on-off valve 8 of two places is in the open state, the first on-off valve 7 of two places is in the closed state. By monitoring the pressure value at the first pressure point and the second pressure point, when the staff finds that the pressure value difference measured by the first pressure point and the second pressure point is large, then it shows that the internal blocking phenomenon of the pipeline to be cleaned occurs, at this time, the second on-off valve 8 of two places can be closed, the first on-off valve 7 of two places is opened, flushing pipeline 1 and the pipeline to be cleaned constitute a circulating path, flushing liquid is transported to the inside of the pipeline to be cleaned by using flushing pipeline 1, and the dredging treatment is realized.

[0027] Further, the driving source 4 and the filter 5 are connected to the flushing pipeline 1, the flushing liquid in the flushing pipeline 1 can be circulated and transported by using the driving source 4 (water pump, etc.), the insoluble crystalline substances flushed down can be blocked and temporarily stored by using the filter 5, after subsequent flushing is completed, the filter 5 can be only disassembled from the flushing pipeline 1 for cleaning.

[0028] Specifically, in order to conveniently obtain the pressure at the first pressure point and the second pressure point, the first pressure point and the second pressure point can be respectively provided with the first pressure measuring element 2 and the second pressure measuring element 3, the first pressure measuring element 2 and the second pressure measuring element 3 can be both set as the conventional pressure measuring instrument in the prior art, such as pressure gauge.

[0029] Embodiment two:

[0030] As Figure 2As shown, in order to clean the inside of the flushing pipeline 1 well, quartz sand is mixed in the flushing liquid, and the quartz sand is used to clean the attached crystals by friction during the flushing process. Based on the classification and collection of large-volume insoluble crystals and quartz sand, the embodiment is different from the first embodiment in that the filter 5 is arranged in two groups, and the two groups of filters 5 are arranged in parallel and are alternatively connected to the flushing pipeline 1. Specifically, part of the flushing pipeline 1 is composed of the parallel first pipeline 101 and the second pipeline 102, and the two groups of filters 5 are arranged on the first pipeline 101 and the second pipeline 102, respectively, and control valves 6 are arranged on the first pipeline 101 and the second pipeline 102.

[0031] Before flushing, the control valve 6 on the first pipeline 101 is opened, and the control valve 6 on the second pipeline 102 is closed, so that the filter 5 on the first pipeline 101 is connected to the flushing pipeline 1, and during the flushing process, the flushing liquid can clean the large-volume crystals in the flushing pipeline 1 and drive them into the filter 5, and the filter 5 is temporarily stored by the filter screen 502 in the filter 5. Then the control valve 6 on the first pipeline 101 can be closed, and the control valve 6 on the second pipeline 102 can be opened, so that the filter 5 on the second pipeline 102 is connected to the flushing pipeline 1, and then quartz sand is added to the flushing pipeline 1, and the quartz sand is used to clean the crystals attached to the inner wall of the flushing pipeline 1, and the filter 5 on the second pipeline 102 can be temporarily stored by the quartz sand. The two groups of filters 5 are then detached from the flushing pipeline 1, and the large-volume crystals can be processed and the quartz sand can be recycled.

[0032] The above describes one embodiment of the present application in detail, but the above description is only a preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements within the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. A flushing device for a pipe, characterized in that The flushing device comprises a flushing pipeline (1) connected to an air outlet pipeline (a) at both ends, the air outlet pipeline (a) is provided with a first pressure measuring point and a second pressure measuring point in sequence along the pipeline length direction, and the first pressure measuring point and the second pressure measuring point are both located inside the two ends of the flushing pipeline (1), and the part of the air outlet pipeline (a) between the first pressure measuring point and the second pressure measuring point constitutes a pipeline to be cleaned; the flushing device further comprises two groups of filter pieces (5) arranged on the flushing pipeline (1), the two groups of filter pieces (5) are arranged in parallel and are alternatively connected to the flushing pipeline (1); The first pressure measuring point and the second pressure measuring point are respectively provided with a first pressure measuring piece (2) and a second pressure measuring piece (3); A part of the flushing pipeline (1) is composed of a first pipeline (101) and a second pipeline (102) in parallel, the two groups of filter pieces (5) are respectively arranged on the first pipeline (101) and the second pipeline (102), and the first pipeline (101) and the second pipeline (102) are both provided with a control valve (6); The filter piece (5) comprises a box body (501) connected to the first pipeline (101) or the second pipeline (102), and a filter screen (502) is arranged in the box body (501), the aperture of the filter screen (502) on the first pipeline (101) is larger than the aperture size of the filter screen (502) on the second pipeline (102).

2. A flushing device for a pipe according to claim 1, characterized in that The flushing pipeline (1) is connected with a driving source (4).

3. A flush device for a plumbing fixture as defined in claim 1, wherein, The first pressure measuring piece (2) and the second pressure measuring piece (3) are both pressure gauges.

4. A flush device for a plumbing fixture as defined in claim 2, wherein, The driving source (4) is a water pump.

5. A flushing device for a pipe according to any one of claims 1-4, characterized in that The two ends of the flushing pipeline (1) are both provided with a first on-off valve (7).

6. A flushing device for a pipe according to any one of claims 1-4, characterized in that The two ends of the pipeline to be cleaned are both provided with a second on-off valve (8).

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