Water pressure test control system for waste heat boiler

Abstract

The invention relates to the technical field of water pressure tests, and provides a waste heat boiler water pressure test control system comprising a water feeding module used for feeding water to a boiler; the pressurization module is used for realizing pressurization of the boiler; the water return module is used for discharging water discharged by the boiler; the water tank is connected with the water feeding module, the pressurizing module and the water returning module through pipelines, and a water returning opening in the upper end of the water tank communicates with a filtering device; and the control module is electrically connected with the water feeding module, the pressurizing module and the water returning module. Water discharged by the boiler is filtered by arranging the filtering device, the water quality of the water tank is guaranteed, and the water pressure test effect is prevented from being affected.

Description

Technical Field

[0001] The invention relates to the technical field of water pressure testing, and in particular to a waste heat boiler water pressure testing control system. Background Art

[0002] In the construction of thermal power station boilers, the boiler water pressure test is an important inspection method to check whether the boiler body installation meets the industry standard under cold conditions. The results of this test directly determine the subsequent boiler work and the stability of the commercial operation stage of the power station. Existing water pressure test systems, such as CN213181061U, a boiler water pressure test system, have the following problems: the water discharged from the boiler directly enters the water tank without being filtered, which is easy to affect the water quality of the water tank, thereby easily affecting the effect of the water pressure test. Summary of the invention

[0003] The present invention provides a waste heat boiler water pressure test control system, which is used to solve the technical problems of the prior art proposed by the above background technology.

[0004] In order to solve the above problems, the present invention discloses a waste heat boiler water pressure test control system, comprising:

[0005] Water supply module, used for supplying water to the boiler;

[0006] A pressurizing module, used to increase the pressure of the boiler;

[0007] A return water module is used to discharge the water discharged from the boiler;

[0008] A water tank is connected to the water supply module, the pressurizing module, and the water return module through pipelines, and the water return port at the upper end of the water tank is connected to a filtering device;

[0009] The control module is electrically connected to the water supply module, the pressurizing module and the water return module respectively.

[0010] Preferably, the water supply module comprises:

[0011] a first water pump, wherein a water inlet of the first water pump is connected to a water outlet of the water tank through a first pipe, and a water outlet of the first water pump is connected to a water inlet of the boiler through a second pipe;

[0012] The first pipeline is connected to a first valve, the second pipeline is connected to a second valve, and the first valve, the second valve and the first water pump are electrically connected to a control module respectively.

[0013] Preferably, the pressurizing module comprises:

[0014] A test booster pump, wherein the water inlet end is connected to the water tank, the output end of the test booster pump is connected to one end of the third pipe, the third pipe is connected to the third valve, the first end of the fourth pipe is connected to the first water outlet of the boiler, the second end of the fourth pipe is connected to the other end of the third pipe; the test booster pump and the third valve are electrically connected to the control module respectively.

[0015] Preferably, a test discharge pipe is further provided on the third pipeline between the third valve and the test pressure pump, and an eighth valve is provided on the test discharge pipe, further comprising:

[0016] The first acquisition module is used to obtain the current target working parameter range of the test booster pump under different working modes, and the current target working parameter range includes: the target water pressure range of the outlet of the test booster pump, and the target water inlet flow range of the outlet of the test booster pump; the working modes include: high pressure mode, medium pressure mode, and low pressure mode;

[0017] The second acquisition module is used to obtain a historical working parameter group of the test booster pump during normal operation within a preset time period before the current operation;

[0018] A screening module, used for screening a target historical working parameter group, wherein key working parameters of the target historical working parameter group are within a corresponding current target working parameter range;

[0019] A third acquisition module is used to obtain the target pressure adjustment history control parameters of the test booster pump corresponding to the target history working parameter group;

[0020] The pressure monitoring device is installed at the outlet of the test booster pump to monitor the water pressure at the location;

[0021] A flow monitoring device is provided at the outlet of the test booster pump to monitor the water flow at the outlet;

[0022] The timing unit is used to time the working time of the test booster pump during the test; when testing the test booster pump: close the third valve and open the eighth valve, control the actual pressure adjustment control parameters of the test booster pump, and perform pressure testing for the average value of the corresponding target pressure adjustment historical control parameters. During the pressure test, the pressure monitoring device and the flow monitoring device perform multiple monitoring;

[0023] A first curve construction unit is used to construct a time-actual pressure curve based on the monitoring value of the timing unit as the horizontal coordinate and the monitoring value of the pressure monitoring device as the vertical coordinate, and to construct a time-actual flow curve based on the monitoring value of the timing unit as the horizontal coordinate and the monitoring value of the flow monitoring device as the vertical coordinate; and divide the pressure-time curve into a plurality of first sub-segments at a certain time interval, and divide the flow-time curve into a plurality of second sub-segments at a certain time interval;

[0024] A second curve construction unit is used to construct an actual pressure-actual flow change curve, where the actual pressure-actual flow change curve is divided into a plurality of third sub-segments at a certain pressure interval;

[0025] A first calculation module, used for calculating a pressure evaluation value of a test pressure pump based on the first sub-segment;

[0026] A second calculation module, used for calculating the flow evaluation value of the test booster pump based on the second sub-segment;

[0027] A third calculation module is used to calculate the working evaluation value of the test pressure pump based on the pressure evaluation value of the test pressure pump, the flow evaluation value of the test pressure pump, and the pressure-flow change curve;

[0028] The early warning module is used to sound an alarm when any of the pressure evaluation value of the test booster pump, the flow evaluation value of the test booster pump, and the working evaluation value of the test booster pump is not within the corresponding preset range.

[0029] Preferably, the water return module comprises:

[0030] a fifth pipeline, one end of which is connected to the second end of the fourth pipeline, the other end of which is connected to the first end of the fifth pipeline, the second end of which is connected to the second water pump, the fifth pipeline being connected to a fifth valve, and the fifth pipeline being connected to a fifth valve;

[0031] a seventh pipeline, one end of which is connected to the second water outlet of the boiler, the other end of which is connected to the first end of the fifth pipeline, and a seventh valve is connected to the seventh pipeline;

[0032] a sixth pipeline, one end of which is connected to the water outlet of the second water pump, and the other end of which is connected to the first water inlet of the filtering device, and a sixth valve is connected to the sixth pipeline;

[0033] a seventh pipe, one end of which is connected to the overflow port of the boiler, the other end of which is connected to the second water inlet of the filter device, and a seventh valve is connected to the seventh pipe;

[0034] The fifth valve, the fifth valve, the seventh valve, the sixth valve, the seventh valve and the second water pump are electrically connected to the control module respectively.

[0035] Preferably, the filter device is a self-cleaning filter device, and the filter device comprises:

[0036] A filter box, the upper end of which is connected to a filter screen cleaning and downward pressing drive mechanism;

[0037] Two groups of left-right symmetrical auxiliary mechanisms, the auxiliary mechanism on the left side includes: a fixed block, the fixed block is fixedly connected to the left inner wall of the filter box, the front and rear ends of the mounting block are respectively movably and sealedly connected to the front and rear ends of the filter box, an elastic connector is connected between the mounting block and the fixed block, a discharge outlet is arranged on the left wall of the filter box, the right part of the upper end of the discharge outlet is an inclined plane 1 which is lower on the left and higher on the right, and an elastic cloth is used to seal the left and right directions between the left side of the mounting block and the right side of the inclined plane 1; the upper right end of the connecting rod is hinged to the mounting block, the lower left end of the connecting rod is hinged with a slider, the slider is connected to the right side of the sealing door for up and down sliding, the upper end of the sealing door is hinged to the upper end of the discharge outlet, the sealing door is used to seal the discharge outlet, the filter screen is fixedly connected between the mounting blocks on the left and right sides, and the front and rear ends of the filter screen are movably and sealedly connected to the inner walls of the front and rear sides of the filter box;

[0038] Two groups of collecting boxes are respectively arranged on the left and right side walls of the filter box, and the two groups of collecting boxes are respectively connected to the two discharge ports.

[0039] Compared with the prior art, the present invention has the following beneficial effects: the present invention filters the water discharged from the boiler by arranging a filtering device, thereby ensuring the water quality of the water tank and avoiding affecting the effect of the water pressure test.

[0040] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0042] Figure 1 It is a structural schematic diagram of the system of the present invention;

[0043] Figure 2 It is a schematic structural diagram of the filtering device of the present invention.

[0044] In the figure: 1. water supply module; 11. first water pump; 12. first pipeline; 13. second pipeline; 14. first valve; 15. second valve; 2. pressurizing module; 21. test pressurizing pump; 22. third pipeline; 23. third valve; 24. fourth pipeline; 3. water tank; 4. return water module; 41. seventh valve; 42. fifth pipeline; 43. second water pump; 44. sixth valve; 45. fifth valve; 46. seventh pipeline; 47. sixth pipeline; 5. filter device; 51 , filter box; 52, fixing block; 53, mounting block; 54, elastic connector; 55, discharge port; 56, inclined plane 1; 57, elastic cloth seal; 58, slider; 59, connecting rod; 510, sealing door; 511, collecting box; 6, filter screen cleaning and downward pressure drive mechanism; 61, cavity; 62, bidirectional screw; 63, motor; 64, threaded slider; 65, vertical rod 1; 66, brush; 67, inclined block; 68, inclined plane 2; 69, vertical rod 2; 7, filter screen; 8, boiler. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0046] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0048] The present invention provides the following embodiments

[0049] Embodiment 1, the present invention provides a waste heat boiler water pressure test control system, such as Figure 1-Figure 2 As shown, including:

[0050] A water supply module 1, used for supplying water to the boiler 8;

[0051] A pressurizing module 2, used to increase the pressure of the boiler 8;

[0052] A water return module 4 is used to discharge water discharged from the boiler 8;

[0053] The water tank 3 is connected to the water supply module 1 and the water return module 4 through pipelines, and the water return port at the upper end of the water tank 3 is connected to the filtering device 5;

[0054] The control module is electrically connected to the water supply module 1, the pressurizing module 2, and the water return module 4 respectively.

[0055] Preferably, the water supply module 1 comprises:

[0056] A first water pump 11, the water inlet of the first water pump 11 is connected to the water outlet of the water tank 3 through a first pipe 12, and the water outlet of the first water pump 11 is connected to the water inlet of the boiler 8 through a second pipe 13;

[0057] The first pipe 12 is connected to a first valve 14, the second pipe 13 is connected to a second valve 15, and the first valve 14, the second valve 15, and the first water pump 11 are electrically connected to the control module respectively. The water tank can be set as two connected water tanks;

[0058] Preferably, the pressurizing module 2 comprises:

[0059] The test booster pump 21 has its water inlet connected to a water source (which may be water in the water tank 3), its output connected to one end of a third pipe 22, the third pipe 22 being connected to a third valve 23, a first end of a fourth pipe 24 connected to a pressurized water inlet of a boiler 8 (which is prior art, refer to CN205483613U and CN213181061U), a second end of the fourth pipe 24 connected to the other end of the third pipe 22; the test booster pump 21 and the third valve 23 are electrically connected to the control module respectively.

[0060] Preferably, a first end of the fifth pipeline 42 is connected to the water outlet of the boiler 8, a second end of the fifth pipeline 42 is connected to the second water pump 43, and a fifth valve 45 is connected to the fifth pipeline 42;

[0061] A sixth pipe 47, one end of which is connected to the water outlet of the second water pump 43, and the other end of which is connected to the first water inlet of the filter device 5. The sixth pipe 47 is connected to a sixth valve 44;

[0062] A seventh pipe 46, one end of which is connected to the overflow port of the boiler 8, and the other end of which is connected to the second water inlet of the filter device 5. The seventh pipe 46 is connected to a seventh valve 41;

[0063] The fifth valve 45 , the sixth valve 44 , the seventh valve 41 , and the second water pump 43 are electrically connected to the control module respectively.

[0064] The working principle and beneficial effects of the above technical solution are:

[0065] Before the boiler water pressure test, a wind pressure test of 0.3-0.5MPa is carried out to early find out whether there are cracks, holes and other major defects in the welds, heads and pipes within the system range, whether the system pipelines within the water pressure range are installed properly, whether there are missing interfaces or temporary plugs, and eliminate them in time, so as to create conditions for a successful water pressure test. The wind pressure test is generally carried out by boosting the system during the day. Personnel are required on site to monitor the system pressure to ensure that the pressure can rise steadily. It is advisable to check the system at night when it is relatively quiet.

[0066] During the water pressure test, first: open the first valve 14 and the second valve 15, and add the water in the water tank to the boiler through the first pipe 12, the first water pump 11, and the second pipe 13. When the overflow port of the boiler overflows, close the first valve 14, the second valve 15, and the first water pump 11;

[0067] Confirm that all the pipe openings of the boiler 8 are in a closed state, open the third valve 23, start the test pressure pump 21, inject water into the boiler 8, and pressurize it according to the process requirements.

[0068] In the present invention, the overflow port of the boiler is connected to the seventh pipe 46 and the seventh valve 41, and then input into the filter device 5 for filtration and then enters the water tank 3;

[0069] The water discharged from the water outlet is input into the filter device 5 through the fifth pipe 42 , the fifth valve 45 , the second water pump 43 , the sixth pipe 47 , and the sixth valve 44 , and then enters the water tank 3 after being filtered.

[0070] The present invention filters the water discharged from the boiler by arranging the filter device 5, thereby ensuring the water quality of the water tank and avoiding affecting the effect of the water pressure test.

[0071] The present invention solves the following problems raised by the background technology:

[0072] Existing water pressure test systems, such as CN213181061U, a boiler water pressure test system, have the following problems: the water discharged from the boiler directly enters the water tank without being filtered, which is easy to affect the water quality of the water tank, thereby easily affecting the effect of the water pressure test.

[0073] Embodiment 2, on the basis of embodiment 1, the filter device 5 is a self-cleaning filter device, and the filter device 5 comprises: a filter box 51, and the upper end of the filter box 51 is connected to a filter cleaning and pressing driving mechanism 6;

[0074] Two groups of left-right symmetrical auxiliary mechanisms, the auxiliary mechanism on the left side includes: a fixed block 52, the fixed block 52 is fixedly connected to the left inner wall of the filter box 51, the front and rear ends of the mounting block 53 are respectively movably sealed with the front and rear ends of the filter box 51, an elastic connector 54 is connected between the mounting block 53 and the fixed block 52, a discharge port 55 is arranged on the left wall of the filter box 51, the right part of the upper end of the discharge port 55 is a slope 56 which is lower on the left and higher on the right, and an elastic cloth seal 57 is passed between the left side of the mounting block 53 and the right side of the slope 56 in the left and right directions; the upper right end of the connecting rod 59 is hinged to the mounting block 53, the lower left end of the connecting rod 59 is hinged to a slider 58, the slider 58 is slidably connected to the right side of the sealing door 510 up and down, the upper end of the sealing door 510 is hinged to the upper end of the discharge port 55, the sealing door 510 is used to seal the discharge port 55, the filter screen 7 is fixedly connected between the mounting blocks 53 on the left and right sides, and the front and rear ends of the filter screen 7 are movably sealed with the inner walls of the front and rear sides of the filter box 51;

[0075] The two groups of collecting boxes 511 are respectively arranged on the left and right side walls of the filter box 51 , and the two groups of collecting boxes 511 are respectively connected to the two discharge ports 55 .

[0076] Preferably, the filter cleaning and pressing driving mechanism 6 comprises:

[0077] The cavity 61 is arranged at the upper end of the filter box 51, and the bidirectional screw 62 is rotatably connected to the inner wall of the cavity 61, and the bidirectional screw 62 is driven to rotate by the motor 63. The bidirectional screw 62 is horizontally arranged along the left and right directions, and the screw segments of the left and right parts of the bidirectional screw 62 have opposite thread directions;

[0078] Two sets of threaded sliders 64 are respectively threadedly connected to the left and right screw sections of the bidirectional screw 62. The lower ends of the two sets of threaded sliders 64 are connected to two sets of vertical rods 65 one by one. The lower ends of the vertical rods 65 are provided with brushes 66. The bristles of the brushes 66 are in contact with the upper end of the filter screen 7.

[0079] Two groups of inclined blocks 67 are connected to the two groups of threaded sliders 64 on the sides away from each other in a symmetrical manner. The left side of the inclined block 67 is provided with an inclined surface 68 which is higher on the left and lower on the right.

[0080] The two second vertical rods 69 are respectively fixedly connected to the upper ends of the two groups of mounting blocks 53 , and the upper ends of the two second vertical rods 69 are respectively in contact with the second inclined surfaces 68 of the two groups of inclined blocks 67 .

[0081] The elastic connecting member 54 may be a spring or a spring rod;

[0082] The working principle and beneficial effects of the above technical solution are:

[0083] 1. As Figure 2As shown, water enters the filter box 51 and is filtered through the filter screen 7. The filter screen 7 can be buffered and supported by the elastic connector 54. When the filter screen 7 is filtering normally, the sealing door 510 seals the discharge port 55 to prevent more water from entering the collection box 511. At this time, the brush 66 is located near the center of the filter screen 7.

[0084] 2. When there are many impurities on the filter screen 7, start the motor 63 to drive the bidirectional screw 62 to rotate, so that the two groups of threaded sliders 64 move away from each other, thereby driving the two groups of inclined blocks 67 and the two groups of brushes 66 to move away from each other through the two groups of vertical rods 1 65, and sweeping the impurities on the filter screen 7 to the corresponding discharge port 55 through the brush 66, so as to enter the collection box 511 through the discharge port 55. When the inclined surfaces 2 68 of the two groups of inclined blocks 67 contact the corresponding vertical rods 2 69 respectively, the two groups of inclined blocks 67 continue to move away from each other, and press down the corresponding vertical rods 2 69 through the inclined surfaces 2 68, thereby driving the corresponding sealing door 510 to open through the connecting rod 59 and the slider 58, so that the impurities enter the collection box 511 through the discharge port 55.

[0085] 3. The present invention realizes automatic cleaning of the filter screen 7 and automatic door opening for impurity removal through one drive, and the control is convenient.

[0086] Embodiment 3, based on Embodiment 1 or 2, a test discharge pipe is further provided on the third pipeline 22 between the third valve 23 and the test pressure pump 21, and an eighth valve is provided on the test discharge pipe, and further comprises:

[0087] The first acquisition module is used to obtain the current target working parameter range of the test booster pump 21 under different working modes. The current target working parameter range includes: the target water pressure range of the outlet of the test booster pump 21, and the target water inlet flow range of the outlet of the test booster pump 21; the working modes include: high pressure mode, medium pressure mode, and low pressure mode;

[0088] The second acquisition module is used to acquire a historical working parameter group of the test booster pump 21 during normal operation within a preset time period before the current operation;

[0089] A screening module, used for screening a target historical working parameter group, wherein key working parameters of the target historical working parameter group are within a corresponding current target working parameter range;

[0090] The third acquisition module is used to obtain the target pressure adjustment history control parameters of the test booster pump 21 corresponding to the target history working parameter group;

[0091] A pressure monitoring device is provided at the outlet of the test pressure pump 21 and is used to monitor the water pressure at the outlet;

[0092] A flow monitoring device is provided at the outlet of the test booster pump 21 and is used to monitor the water flow at the outlet;

[0093] The timing unit is used to time the working time of the test booster pump 21 during the test; when testing the test booster pump 21: close the third valve 23, and open the eighth valve, control the actual pressure adjustment control parameters of the test booster pump 21, and perform pressure testing for the average value of the corresponding target pressure adjustment historical control parameters. During the pressure test, the pressure monitoring device and the flow monitoring device perform multiple monitoring;

[0094] A first curve construction unit is used to construct a time-actual pressure curve based on the monitoring value of the timing unit as the horizontal coordinate and the monitoring value of the pressure monitoring device as the vertical coordinate, and to construct a time-actual flow curve based on the monitoring value of the timing unit as the horizontal coordinate and the monitoring value of the flow monitoring device as the vertical coordinate; and divide the pressure-time curve into a plurality of first sub-segments at a certain time interval, and divide the flow-time curve into a plurality of second sub-segments at a certain time interval;

[0095] A second curve construction unit is used to construct an actual pressure-actual flow change curve, where the actual pressure-actual flow change curve is divided into a plurality of third sub-segments at a certain pressure interval;

[0096] A first calculation module, used for calculating a pressure evaluation value of the test pressure pump 21 based on the first sub-segment;

[0097] A second calculation module, used for calculating the flow evaluation value of the test booster pump 21 based on the second sub-segment;

[0098] A third calculation module is used to calculate the working evaluation value of the test pressure pump 21 based on the pressure evaluation value of the test pressure pump 21, the flow evaluation value of the test pressure pump 21, and the pressure-flow change curve;

[0099] The early warning module is used to give an alarm when any one of the pressure evaluation value of the test booster pump 21, the flow evaluation value of the test booster pump 21, and the working evaluation value of the test booster pump 21 is not within the corresponding preset range.

[0100] Preferably, the first calculation module calculates based on the following formula:

[0101]

[0102] W 1 C is the pressure evaluation value of the test pressure pump 21; i is the length of the time period in which the ordinate of the i-th first sub-segment is within the corresponding target water pressure range; C i0 is the length of the time period during which the ordinate of the i-th first sub-segment is not within the corresponding target water pressure range; M i is the number of inflection points of the first sub-segment of the i-th sub-segment; A i1 is the maximum ordinate of the i-th first subsegment; A i2is the minimum ordinate of the first subsegment of the i-th segment; δ i1 is the average slope of the inflection point of the first sub-segment of the i-th segment; δ i2 The maximum absolute value of the slope of the inflection point of the first sub-segment of the i-th To combine A i1 -A i2 , M i , The reliability of the first pressure change is based on - Obtaining a first pressure change reliability mapping table or a corresponding correlation function; the first pressure change reliability value is greater than or equal to 0 and less than or equal to 1); is the average ordinate of the i-th first subsegment; is the average ordinate of the i-1th first subsegment; for The corresponding second pressure change reliability (based on - The second pressure change reliability mapping table or the corresponding correlation function is obtained; the second pressure change reliability value is greater than or equal to 0 and less than or equal to 1); ∝ 1 is the first pressure assessment weight (the value is greater than 0 and less than 1); 2 is the second pressure assessment weight (the value is greater than 0 and less than 1); M is the total number of the first sub-segments;

[0103] The second calculation module is based on the following calculation formula:

[0104]

[0105] W 2 is the flow rate evaluation value of the test booster pump 21; d i is the length of the time period in which the ordinate of the i-th second sub-segment is within the target flow range; d i0 is the length of the time period in which the ordinate of the i-th second sub-segment is not within the target flow range; m i is the number of inflection points of the second sub-segment of the i-th segment; ε i1 is the average slope of the inflection point of the second sub-segment of the i-th segment; ε i2 is the maximum absolute value of the slope of the inflection point of the i-th second sub-segment; B i1 is the maximum ordinate of the i-th second subsegment; B i2 is the minimum ordinate of the i-th second subsegment;

[0106] To combine B i1 -B i2 , m i , The first flow change reliability obtained (based on - Acquisition of a first flow change reliability mapping table or a corresponding correlation function; the first flow change reliability value is greater than or equal to 0 and less than or equal to 1); is the average ordinate of the i-th second subsegment; is the average ordinate of the i-1th second subsegment; for The corresponding second flow change reliability (based on - The second flow change reliability mapping table or the corresponding correlation function is obtained; the second flow change reliability value is greater than or equal to 0 and less than or equal to 1); ∝ 3 is the first traffic evaluation weight (the value is greater than 0 and less than 1); 4 is the second traffic evaluation weight (the value is greater than 0 and less than 1); m is the total number of the second sub-segments;

[0107] The third calculation module is based on the following calculation formula:

[0108]

[0109] is the similarity between the actual third sub-segment and the corresponding third sub-segment; ∈ j is the importance of the jth third sub-segment of the current working mode; W is the working evaluation value of the test booster pump 21; K 1 , K 2 , K 3 They are respectively the first weight, the second weight, and the third weight (all values ​​are greater than 0 and less than 1); N is the total number of the third sub-segments.

[0110] The beneficial effects of the above technical solution are as follows: since the test booster pump 21 works for a long time, its own performance may be abnormal, so the test booster pump 21 is tested before the water pressure test of the boiler, so that when the test booster pump 21 is abnormal, an alarm is issued in time to remind replacement and maintenance, thereby ensuring the water pressure test effect of the boiler;

[0111] First, based on the current target working parameter range of the test booster pump 21 in different working modes (the current working mode can be divided into different processes / time periods as needed, and each working parameter includes different time periods / different processes as different ranges), the target historical working parameter group is screened, and then the target pressure regulation history control parameters of the test booster pump 21 corresponding to the target historical working parameter group are obtained. When testing the test booster pump 21: close the third valve 23, and open the eighth valve, control the actual pressure regulation control parameters of the test booster pump 21, and perform a pressure test on the average value of the corresponding target pressure regulation history control parameters to ensure reliable selection of the pressure regulation control parameters;

[0112] During the test, the pressure monitoring device and the flow monitoring device perform multiple monitoring to obtain the time-actual pressure curve, the time-actual flow curve, and the actual pressure-actual flow change curve, which are respectively divided into the first sub-segment, the second sub-segment, and the third sub-segment to facilitate targeted evaluation of the corresponding sub-segments and ensure the reliability of the evaluation;

[0113] When calculating the pressure evaluation value of the test booster pump 21: based on the satisfaction of the target water pressure range corresponding to the target Reliable status of comprehensive water pressure changes The reliable state of the change state of the first sub-segment of the two preceding and following segments Reliable calculation;

[0114] When calculating the flow evaluation value of the test booster pump 21: based on the satisfaction of the target flow range corresponding to the target Reliable status of comprehensive flow changes The reliable state of the change state of the second sub-segment of the two preceding and following segments Reliable calculation.

[0115] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A waste heat boiler water pressure test control system, characterized in that: include: A water supply module (1), used for supplying water to the boiler (8); A pressurizing module (2) for increasing the pressure of the boiler (8); A water return module (4) for discharging water discharged from the boiler (8); The water tank (3) is respectively connected to the water supply module (1), the pressure module (2), and the water return module (4) through pipelines, and the water return port at the upper end of the water tank (3) is connected to a filtering device (5); The control module is electrically connected to the water supply module (1), the pressurizing module (2) and the water return module (4) respectively.

2. A waste heat boiler water pressure test control system according to claim 1, characterized in that: The water supply module (1) comprises: A first water pump (11), wherein a water inlet of the first water pump (11) is connected to a water outlet of the water tank (3) via a first pipe (12), and a water outlet of the first water pump (11) is connected to a water inlet of the boiler (8) via a second pipe (13); The first pipeline (12) is connected to a first valve (14), the second pipeline (13) is connected to a second valve (15), and the first valve (14), the second valve (15) and the first water pump (11) are electrically connected to a control module respectively.

3. A waste heat boiler water pressure test control system according to claim 1, characterized in that: The pressurizing module (2) comprises: A test booster pump (21) has a water inlet end connected to a water tank (3), an output end of the test booster pump (21) connected to one end of a third pipe (22), a third valve (23) connected to the third pipe (22), a first end of a fourth pipe (24) connected to a pressurized water inlet of a boiler (8), and a second end of the fourth pipe (24) connected to the other end of the third pipe (22); the test booster pump (21) and the third valve (23) are electrically connected to a control module, respectively.

4. A waste heat boiler water pressure test control system according to claim 1, characterized in that: A test discharge pipe is also provided on the third pipeline (22) between the third valve (23) and the test pressure pump (21), and an eighth valve is provided on the test discharge pipe, which further comprises: A first acquisition module is used to acquire the current target operating parameter range of the test booster pump (21) under different operating modes, wherein the current target operating parameter range includes: a target water pressure range at the outlet of the test booster pump (21), and a target water inlet flow range at the outlet of the test booster pump (21); the operating modes include: a high pressure mode, a medium pressure mode, and a low pressure mode; A second acquisition module is used to acquire a historical working parameter group of the test pressure pump (21) during normal operation within a preset time period before the current operation; A screening module, used for screening a target historical working parameter group, wherein key working parameters of the target historical working parameter group are within a corresponding current target working parameter range; A third acquisition module is used to acquire a target pressure adjustment history control parameter of a test booster pump (21) corresponding to the target history working parameter group; A pressure monitoring device, arranged at the outlet of the test pressure pump (21), for monitoring the water pressure at the outlet; A flow monitoring device, arranged at the outlet of the test pressure pump (21), for monitoring the water flow at the outlet; A timing unit is used to time the working time of the test pressure pump (21) during the test; when the test pressure pump (21) is tested: the third valve (23) is closed, and the eighth valve is opened, and the actual pressure adjustment control parameter of the test pressure pump (21) is controlled to perform a pressure test for the average value of the corresponding target pressure adjustment historical control parameter, and the pressure monitoring device and the flow monitoring device perform multiple monitoring during the pressure test; A first curve construction unit is used to construct a time-actual pressure curve based on the monitoring value of the timing unit as the horizontal coordinate and the monitoring value of the pressure monitoring device as the vertical coordinate, and to construct a time-actual flow curve based on the monitoring value of the timing unit as the horizontal coordinate and the monitoring value of the flow monitoring device as the vertical coordinate; and divide the pressure-time curve into a plurality of first sub-segments at a certain time interval, and divide the flow-time curve into a plurality of second sub-segments at a certain time interval; A second curve construction unit is used to construct an actual pressure-actual flow change curve, where the actual pressure-actual flow change curve is divided into a plurality of third sub-segments at a certain pressure interval; A first calculation module, used for calculating a pressure evaluation value of a test pressure pump (21) based on the first sub-segment; A second calculation module, used for calculating a flow evaluation value of a test booster pump (21) based on the second sub-segment; a third calculation module, for calculating a working evaluation value of the test pressure pump (21) based on a pressure evaluation value of the test pressure pump (21), a flow evaluation value of the test pressure pump (21), and a pressure-flow variation curve; The early warning module is used to generate an alarm when any of the pressure evaluation value of the test booster pump (21), the flow evaluation value of the test booster pump (21), and the working evaluation value of the test booster pump (21) is not within a corresponding preset range.

5. A waste heat boiler water pressure test control system according to claim 4, characterized in that: The first calculation module is based on the following calculation formula: W1 is the pressure evaluation value of the test pressure pump (21); C i is the length of the time period in which the ordinate of the i-th first sub-segment is within the corresponding target water pressure range; C i0 is the length of the time period during which the ordinate of the i-th first sub-segment is not within the corresponding target water pressure range; M i is the number of inflection points of the first sub-segment of the i-th sub-segment; A i1 is the maximum ordinate of the i-th first subsegment; A i2 is the minimum ordinate of the i-th first subsegment; δ i1 is the average slope of the inflection point of the first sub-segment of the i-th segment; δ i2 is the maximum absolute value of the slope of the inflection point of the i-th first sub-segment; To combine A i1 -A i2 , M i , The reliability of the first pressure change obtained; is the average ordinate of the i-th first subsegment; is the average ordinate of the i-1th first subsegment; for The corresponding second pressure change reliability; ∝1 is the first pressure evaluation weight; ∝2 is the second pressure evaluation weight; M is the total number of the first sub-segments.

6. A waste heat boiler water pressure test control system according to claim 5, characterized in that: The second calculation module is based on the following calculation formula: W2 is the flow rate evaluation value of the test booster pump (21); d i is the length of the time period in which the ordinate of the i-th second sub-segment is within the target flow range; d i0 is the length of the time period in which the ordinate of the i-th second sub-segment is not within the target flow range; m i is the number of inflection points of the second sub-segment of the i-th segment; ε i1 is the average slope of the inflection point of the second sub-segment of the i-th segment; ε i2 is the maximum absolute value of the slope of the inflection point of the i-th second sub-segment; B i1 is the maximum ordinate of the i-th second subsegment; B i2 is the minimum ordinate of the i-th second subsegment; To combine B i1 -B i2 , m i , The obtained first flow rate change reliability; is the average ordinate of the i-th second subsegment; is the average ordinate of the i-1th second subsegment; for The corresponding second flow change reliability; ∝3 is the first flow evaluation weight; ∝4 is the second flow evaluation weight; m is the total number of second sub-segments; The third calculation module is based on the following calculation formula: is the similarity between the actual third sub-segment and the corresponding third sub-segment; ∈ j is the importance of the jth third sub-segment of the current working mode; W is the working evaluation value of the test booster pump (21); K1, K2, K3 are the first weight, the second weight, and the third weight respectively; N is the total number of third sub-segments.

7. A waste heat boiler water pressure test control system according to claim 3, characterized in that: The return water module (4) comprises: A fifth pipeline (42), a first end of which is connected to the water outlet of the boiler (8), a second end of which is connected to the second water pump (43), and a fifth valve (45) is connected to the fifth pipeline (42); A sixth pipeline (47), one end of which is connected to the water outlet of the second water pump (43), the other end of which is connected to the first water inlet of the filter device (5), and a sixth valve (44) is connected to the sixth pipeline (47); A seventh pipe (46), one end of which is connected to the overflow port of the boiler (8), the other end of which is connected to the second water inlet of the filter device (5), and a seventh valve (41) is connected to the seventh pipe (46); The fifth valve (45), the sixth valve (44), the seventh valve (41) and the second water pump (43) are electrically connected to the control module respectively.

8. The waste heat boiler water pressure test control system according to claim 1, characterized in that: The filtering device (5) is a self-cleaning filtering device, and the filtering device (5) comprises: A filter box (51), the upper end of which is connected to a filter screen cleaning and downward pressing drive mechanism (6); Two groups of left-right symmetrical auxiliary mechanisms, the left auxiliary mechanism comprises: a fixed block (52), the fixed block (52) is fixedly connected to the left inner wall of the filter box (51), the front and rear ends of the mounting block (53) are respectively movably sealed with the front and rear ends of the filter box (51), an elastic connecting member (54) is connected between the mounting block (53) and the fixed block (52), a discharge port (55) is arranged on the left wall of the filter box (51), the right part of the upper end of the discharge port (55) is a slope (56) with a lower left side and a higher right side, and the left side of the mounting block (53) and the right side of the slope (56) are connected to each other. The left and right directions of the connecting rod (59) are sealed by elastic cloth (57); the upper right end of the connecting rod (59) is hinged to the mounting block (53); the lower left end of the connecting rod (59) is hinged to a slider (58); the slider (58) is slidably connected to the right side of the sealing door (510) in an up-and-down manner; the upper end of the sealing door (510) is hinged to the upper end of the discharge port (55); the sealing door (510) is used to seal the discharge port (55); the filter screen (7) is fixedly connected between the mounting blocks (53) on the left and right sides; the front and rear ends of the filter screen (7) are movably sealed to the inner walls of the front and rear sides of the filter box (51); The two groups of collecting boxes (511) are respectively arranged on the left and right side walls of the filter box (51), and the two groups of collecting boxes (511) are respectively connected to the two discharge ports (55).

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