Design method of self-correcting resin conveying pipe, resin conveying pipe and application of resin conveying pipe

Abstract

The invention relates to the technical field of condensate polishing and regeneration, and discloses a design method of a self-correcting resin conveying pipe, the self-correcting resin conveying pipe comprises a resin conveying mother pipe, a resin conveying branch pipe and a resin conveying hole, the design method comprises the following steps: determining parameters of the resin conveying mother pipe and the resin conveying branch pipe, the parameters of the resin conveying mother pipe comprise the diameter of the resin conveying mother pipe; the parameters of the resin conveying branch pipes comprise the number and the diameter of the resin conveying branch pipes and the opening distribution of the resin conveying holes in the resin conveying branch pipes; and determining parameters of the resin conveying hole, wherein the parameters of the resin conveying hole comprise the aperture of the resin conveying hole. The invention further discloses a corresponding self-correcting resin conveying pipe, the multiple resin conveying branch pipes are arranged in a hub mode from the center of the resin conveying main pipe, and the resin conveying holes are evenly distributed in the surfaces of the multiple resin conveying branch pipes at certain intervals. The invention further discloses application of the conveying pipe in the anion-cation resin separation process.

Description

Technical Field

[0001] The invention relates to the technical field of condensate polishing and regeneration, and in particular to a design method for a self-correcting resin delivery pipe, a resin delivery pipe and applications thereof. Background Art

[0002] With the continuous improvement of the capacity and parameters of thermal power plant units, higher requirements are placed on the quality of water vapor. The quality of steam and water in the operation of the unit is mainly optimized by the condensate polishing operation. After the resin in the condensate polishing operation fails, it is usually regenerated in vitro. The regeneration steps are mainly divided into the transfer of the failed resin to the regeneration analysis system, the separation of the failed resin and the yin and yang resins, the transfer of the separated resins to the yin and yang regeneration towers for regeneration, and the mixing of the resins for standby use after the regeneration is qualified.

[0003] The regeneration effect has a great influence on the quality and quantity of condensate polishing water. The stratification of anion and cation resins during the regeneration process and the transportation of resins after stratification are more critical. According to the requirements of DL / T 333.1-2010 "Technical Requirements for Condensate Polishing Systems in Thermal Power Plants Part 1: Wet Cooling Units" standard 10.1.3, after the separation of anion and cation resins, the content of anion resin in anion resin should be less than 0.1%; the content of anion resin in cation resin should be less than 0.1%. Poor separation of anion and cation resins will cause the exchange capacity of the difficult resin to decrease, and flushing after resin regeneration may even affect the quality of the effluent water. The main operation that affects the separation of anion and cation resins is the transportation of anion and cation resins.

[0004] Yin-yang resin separation operation: Yin-yang resin separation includes the stratification of yin-yang resins and the transportation of resins after stratification. The stratification of cations and anions can be judged through the peep window of the separation tower. However, the transportation of yin-yang resins often results in poor resin separation effects due to the lack of control measures and irregular operations. Figure 1 A schematic diagram showing that after performing the cation and yin resin separation operation according to the prior art solution, the cation and yin resins are not separated well, and the resin is poorly infected during the subsequent regeneration.

[0005] Resin delivery operations, such as Figure 2 In the resin conveying operation equipment shown in the figure, the following is adopted: Figure 3 If the distribution is shown in the figure, in the final stage of resin delivery or when the amount of water delivered is large, especially when the amount of resin is small, the "funnel" may penetrate the boundary layer between the anion and cation resins, causing a certain amount of cation resin to be input into the anion tower, such as Figure 4-5 shown. Summary of the invention

[0006] The purpose of the present invention is to provide a self-correcting resin delivery pipe design method, a resin delivery pipe and its application, so as to avoid the situation in which the "funnel" may penetrate the cation and anion resin boundary layer in the final stage of resin delivery or when the amount of water delivered is large, especially when the amount of resin is small, causing a certain amount of cation resin to be input into the anion tower.

[0007] A first aspect of the present invention is to provide a method for designing a self-correcting resin delivery pipe, wherein the self-correcting resin delivery pipe comprises a resin delivery mother pipe (15), a resin delivery branch pipe (16) and a resin delivery hole (17), including:

[0008] S1, determining parameters of the resin delivery main pipe (15) and the resin delivery branch pipe (16), wherein the parameters of the resin delivery main pipe (15) include the diameter of the resin delivery main pipe; the parameters of the resin delivery branch pipe (16) include the number and diameter of the resin delivery branch pipes and the opening distribution of the resin delivery holes in the resin delivery branch pipes;

[0009] S2, determining the parameters of the resin delivery hole (17), wherein the parameters of the resin delivery hole (17) include the pore diameter of the resin delivery hole.

[0010] Preferably, the design method of the opening distribution of the resin delivery holes in the resin delivery branch pipe includes:

[0011] S11, calculate the open porosity of the resin at the separation tower interface, as shown in formula (1):

[0012]

[0013] Where: a represents the open porosity of the resin transport in the separation tower, pcs / m 2 ; l represents the number of resin delivery branches (16) in the separation tower; n represents the number of resin delivery holes (17) on each resin delivery branch (16), pcs / branch; R represents the diameter of the separation tower, i.e., the length of the resin delivery mother pipe (15), m;

[0014] S12, dividing the resin separation tower into equidistant concentric circles based on the number of holes on the resin delivery branch pipe (16), and obtaining the number of openings in each concentric circle based on the porosity of the resin at the separation tower interface, as shown in formula (2):

[0015] b=a×S i (2);

[0016] Where: S i represents the area of ​​the i-th concentric circle, i ranges from 1 to 6, m 2 ; b represents the number of holes in each concentric circle, pieces;

[0017] S13, according to the number of openings in each concentric circle and in accordance with the principle that the openings in each resin delivery mother tube are spaced as closely as possible, the number of holes on each resin delivery mother tube (15) is designed to achieve the same or similar resin flow area on each concentric circle.

[0018] Preferably, S2 includes:

[0019] S21, measuring the aperture area on each resin delivery branch pipe (16), and calculating the average resin delivery area, as shown in formula (3):

[0020]

[0021] Where m represents the average resin delivery area in the separation tower, dimensionless; q represents the area of ​​each resin delivery hole in the resin delivery branch pipe in the separation tower, m 2 / pcs; l represents the number of resin delivery branch pipes (16) in the separation tower; n represents the number of resin delivery holes (17) on each resin delivery branch pipe (16), pcs / branch; R represents the diameter of the separation tower, i.e., the length of the resin delivery mother pipe (15), m;

[0022] S22, based on the number of holes on the resin delivery branch pipe, the resin separation tower is divided into equidistant concentric circles, and the resin delivery area of ​​each concentric circle is determined based on the average resin delivery area, as shown in formula (4); the aperture of the resin delivery hole of the concentric circle is obtained according to the number of openings, as shown in formula (5):

[0023] Q i =m×S i (4);

[0024] In the formula, S i represents the area of ​​the i-th concentric circle, i ranges from 1 to 6, m 2 ;Q i Indicates the resin conveying area of ​​each concentric circle, i ranges from 1 to 6, m 2 ;

[0025]

[0026] Where, d i Indicates the diameter of the resin delivery hole on the resin delivery branch pipe in each concentric circle, i ranges from 1 to 6, m 2 ;

[0027] S23, for each resin delivery branch pipe, based on the diameter of the resin delivery hole on the resin delivery branch pipe in each concentric circle, resin delivery holes with different diameters are opened in different concentric circles.

[0028] A second aspect of the present invention is to provide a self-correcting resin delivery pipe, wherein the structure and structural parameters of the self-correcting resin delivery pipe are determined based on the design method of the first aspect, and the self-correcting resin delivery pipe comprises: a resin delivery main pipe (15), a plurality of resin delivery branch pipes (16) and a resin delivery hole (17); wherein:

[0029] The plurality of resin delivery branch pipes (16) are arranged in a hub-like manner starting from the center of the resin delivery mother pipe (15), and the resin delivery holes (17) are evenly distributed on the surface of the plurality of resin delivery branch pipes (16) at a certain interval, and are used to deliver negative resin or positive resin according to the installation position of the self-correcting resin delivery pipe.

[0030] Preferably, the resin delivery branch pipes (16) are in groups of 6 to 20.

[0031] Preferably, the top surface of the resin delivery mother pipe (15) has first mounting holes corresponding to the number of the plurality of resin delivery branch pipes (16).

[0032] Preferably, a mounting cavity is formed inside the resin delivery mother tube (15), one end of the multiple resin delivery branch tubes (16) extends into the mounting cavity, and a second mounting hole corresponding to the first mounting hole is arranged on the portion of the multiple resin delivery branch tubes (16) extending into the mounting cavity, and the resin delivery mother tube (15) and the multiple resin delivery branch tubes (16) are fixedly connected by the cooperation of the first mounting hole and the second mounting hole.

[0033] Preferably, the cooperation includes screw connection, bolt connection, anchor connection or flange connection.

[0034] The third aspect of the present invention is to provide a self-correcting resin delivery pipe for use in a negative and positive resin separation process, wherein the positive and negative resin separation includes the stratification of the positive and negative resins and the delivery of the stratified resins.

[0035] Preferably, the cation and anion resins are separated by a viewing window of the separation tower;

[0036] The resin delivery after the delamination includes:

[0037] After the anion and cation resins are scrubbed in the separation tower, they are hydraulically stratified: the separation tower backwash drain valve (2) and the separation tower backwash inlet valve (6) are opened to fully loosen the resins by hydraulic pressure for 5-15 minutes; the separation tower backwash inlet valve (6) is closed to continue stratification for 5-15 minutes; the separation tower backwash inlet valve (6) is closed again to stratify at a small flow rate for 5-15 minutes, and the separation tower backwash inlet valve (6) and the separation tower backwash drain valve (2) are closed; the cycle is repeated until the resins are fully stratified, with the anion resin on the top and the cation resin on the bottom, and a clear boundary layer (12) of the anion and cation resins appears; the anion and cation resins are respectively transported to the anion and cation regeneration towers by deionized water to prepare for the next step of regeneration;

[0038] Open the anionic resin output valve (4) of the separation tower, open the anionic regeneration tower fat inlet door (8), open the separation tower forward wash water inlet valve (1), and transport the anionic resin in the separation tower to the anionic regeneration tower. After the anionic resin transport is completed, close the separation tower forward wash water inlet valve (1), separate the tower anionic resin output valve (4) and the anionic regeneration tower fat inlet door (8); open the separation tower cation resin output valve (5), open the cation regeneration tower fat inlet door (9), open the separation tower forward wash water inlet valve (1), and transport the cation resin in the separation tower to the cation regeneration tower. After the cation resin transport is completed, close the separation tower forward wash water inlet valve (1), the separation tower cation resin output valve (5) and the cation regeneration tower fat inlet door (9); transport the anionic and cation resins to the corresponding regeneration towers to prepare for the next step of regeneration;

[0039] The anion resin output valve (4) of the separation tower is located at the upper part of the resin boundary layer (12) of the separation tower; the cation resin output valve (5) of the separation tower is located at the bottom of the separation tower; the anion resin is collected in the separation tower through the anion resin delivery pipe and delivered to the anion regeneration tower through the anion resin output valve (4) of the separation tower, and the cation resin is collected by the cation resin delivery pipe and delivered to the cation regeneration tower through the cation resin output valve (5) of the separation tower.

[0040] Beneficial effects of the device and the measuring method of the present invention:

[0041] The radial conveying arrangement makes the actual conveying area of ​​the resin decrease from large to small, from the resin conveying mother pipe as the center to the edge of the separation tower. Due to the strong fluidity of the resin, the resin is vortex-shaped in the separation tower during the conveying process. The closer to the center of the separation tower, the faster the resin conveying speed and the easier the resin is to convey. The resin close to the tower wall is conveyed the slowest. The overall conveying state of the resin in the separation tower is in the shape of a "funnel", thereby avoiding the situation in which the "funnel" may penetrate the boundary layer between the anion and cation resins in the final stage of resin conveying or when the amount of water conveyed is large, especially when the amount of resin is small, causing a certain amount of cation resin to be input into the anion tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A schematic diagram showing that after performing the cation and yin resin separation operation according to the prior art solution, the cation and yin resins are not separated well, and the resin is poorly infected during the subsequent regeneration;

[0044] Figure 2 It is a schematic diagram of a cation resin separation and delivery device according to the prior art;

[0045] Figure 3 A schematic diagram of the distribution and assembly of equipment components for cation and anion resin separation in a separation tower according to the prior art;

[0046] Figure 4 It is a schematic diagram of the normal distribution of cation and anion resins in a separation tower according to the prior art;

[0047] Figure 5 Schematic diagram of abnormal distribution of cation and anion resins in a separation tower according to the prior art, wherein the boundary layer between cation and anion resins is penetrated, causing a certain amount of cation resin to be input into the anion tower;

[0048] Figure 6 A schematic diagram of a self-correcting resin delivery pipe structure and a resin delivery pipe arrangement in a separation tower according to an embodiment of the present invention;

[0049] Figure 7 is a diagram showing the actual arrangement of the resin delivery pipe in the separation tower according to an embodiment of the present invention;

[0050] Figure 8 It is a stereogram of the simulated flow field of resin transportation in the separation tower under the first working condition according to an embodiment of the present invention;

[0051] Fig. 9 It is a plan view of a simulated flow field of resin transport in a separation tower under a first working condition according to an embodiment of the present invention;

[0052] Fig.10 It is a stereogram of the simulated flow field of resin transport in the separation tower under the second working condition for verification according to an embodiment of the present invention;

[0053] Fig.11 It is a plan view of the simulated flow field of resin transportation in the separation tower under the second working condition for verification according to an embodiment of the present invention.

[0054] Reference numerals:

[0055] 1-separation tower forward wash water inlet valve, 2-separation tower backwash drain valve, 3-separation tower air inlet valve, 4-separation tower anion resin output valve, 5-separation tower cation resin output valve, 6-separation tower backwash water inlet valve, 7-separation tower forward wash drain valve, 8-anion regeneration tower fat inlet door, 9-cation regeneration tower fat inlet door, 10-fat outlet door, 11-exhaust valve, 12-anion and anion resin boundary layer, 13-anion regeneration tower forward wash water inlet valve, 14-cation regeneration tower forward wash water inlet valve, 15-resin delivery main pipe, 16-resin delivery branch pipe, 17-resin delivery hole. DETAILED DESCRIPTION

[0056] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] Embodiment 1

[0060] This embodiment provides a method for designing a self-correcting resin delivery pipe, wherein the self-correcting resin delivery pipe includes a resin delivery mother pipe 15, a resin delivery branch pipe 16 and a resin delivery hole 17, including:

[0061] S1, determining parameters of the resin delivery main pipe 15 and the resin delivery branch pipe 16, wherein the parameters of the resin delivery main pipe 15 include the diameter of the resin delivery main pipe; the parameters of the resin delivery branch pipe 16 include the number and diameter of the resin delivery branch pipes and the opening distribution of the resin delivery holes in the resin delivery branch pipes;

[0062] S2, determining the parameters of the resin delivery hole 17, wherein the parameters of the resin delivery hole 17 include the diameter of the resin delivery hole.

[0063] In this embodiment, the purpose of designing the opening distribution of the resin delivery holes in the resin delivery branch pipe is to achieve the same resin flow area in each cross section in the resin separation tower, thereby achieving uniform delivery of the resin on the same layer, avoiding the occurrence of a "funnel" during the resin delivery process, destroying the distribution of the positive and negative resins in the boundary layer, and causing cross-delivery of the resin.

[0064] As a preferred embodiment, the design method of the opening distribution of the resin delivery holes in the resin delivery branch pipe includes:

[0065] S11, calculate the open porosity of the resin at the separation tower interface, as shown in formula (1):

[0066]

[0067] Where: a represents the open porosity of the resin transport in the separation tower, pcs / m 2 ; l represents the number of resin delivery branches 16 in the separation tower; n represents the number of resin delivery holes 17 on each resin delivery branch 16, pcs / branch; R represents the diameter of the separation tower, that is, the length of the resin delivery mother pipe 15, m;

[0068] S12, the resin separation tower is divided into equidistant concentric circles based on the number of holes on the resin delivery branch pipe 16, and the number of openings in each concentric circle is obtained based on the porosity of the resin at the separation tower interface, as shown in formula (2):

[0069] b=a×S i (2);

[0070] Where: S i represents the area of ​​the i-th concentric circle, i ranges from 1 to 6, m 2 ; b represents the number of holes in each concentric circle, pieces;

[0071] S13, according to the number of openings in each concentric circle and the principle that the openings in each resin delivery mother tube are spaced as close as possible, the number of holes on each resin delivery mother tube is designed to achieve the same or similar resin flow area on each concentric circle.

[0072] In this embodiment, a resin separation device is exemplified according to the actual transformation situation:

[0073] A resin separation tower is centered on the resin delivery main pipe 15, and a total of 12 resin delivery branch pipes 16 are arranged radially. Six resin delivery holes 17 are opened on each branch pipe. The diameter of the resin separation tower is 3 meters. Therefore:

[0074]

[0075] The resin separation tower is divided into 6 groups of concentric circles starting from the resin delivery main pipe, namely S1~S6. The resin delivery branch pipes of the resin separation tower are sorted from the north direction. The first resin delivery branch pipe is sorted as 01, followed by branches 01~12. Thus, the number of holes opened in each branch pipe is obtained, as shown in Table 1.

[0076] Table 1

[0077]

[0078] The purpose of designing the aperture of the resin delivery branch pipe in step S2 is: according to the number and uniform arrangement of the openings on the current resin delivery branch pipe, but the aperture increases from small to large from the center of the circle, to achieve the same resin flow area in each cross section of the resin separation tower, thereby achieving uniform delivery of the resin on the same layer, avoiding the occurrence of a "funnel" during the resin delivery process, destroying the distribution of the positive and negative resins in the boundary layer, and causing cross-delivery of the resin.

[0079] As a preferred embodiment, S2 includes:

[0080] S21, measuring the aperture area of ​​each resin delivery branch pipe 16, and calculating the average resin delivery area, as shown in formula (3):

[0081]

[0082] Where m represents the average resin delivery area in the separation tower, dimensionless; q represents the area of ​​each resin delivery hole in the resin delivery branch pipe in the separation tower, m 2 / pcs; l represents the number of resin delivery branches 16 in the separation tower; n represents the number of resin delivery holes 17 on each resin delivery branch 16, pcs / branch; R represents the diameter of the separation tower, that is, the length of the resin delivery mother pipe 15, m;

[0083] S22, based on the number of holes on the resin delivery branch pipe, the resin separation tower is divided into equidistant concentric circles, and the resin delivery area of ​​each concentric circle is determined based on the average resin delivery area, as shown in formula (4); the aperture of the resin delivery hole of the concentric circle is obtained according to the number of openings, as shown in formula (5):

[0084] Q i =m×S i (4);

[0085] In the formula, S i represents the area of ​​the i-th concentric circle, i ranges from 1 to 6, m 2 ;Q i Indicates the resin conveying area of ​​each concentric circle, i ranges from 1 to 6, m 2 ;

[0086]

[0087] Where, d i Indicates the diameter of the resin delivery hole on the resin delivery branch pipe in each concentric circle, i ranges from 1 to 6, m 2 .

[0088] S23, for each resin delivery branch pipe, based on the diameter of the resin delivery hole on each concentric circle, resin delivery holes with different diameters are opened in different concentric circles.

[0089] Embodiment 2

[0090] This embodiment provides a self-correcting resin delivery pipe. The structure and structural parameters of the self-correcting resin delivery pipe are determined based on the design method of the first aspect, including: a resin delivery mother pipe 15, a plurality of resin delivery branch pipes 16 and a resin delivery hole 17; wherein:

[0091] A plurality of resin delivery branch pipes 16 are arranged in a hub-like manner starting from the center of the resin delivery mother pipe 15, and resin delivery holes 17 are evenly distributed on the surface of the plurality of resin delivery branch pipes 16 at a certain interval, and are used to deliver negative resin or positive resin according to the installation position of the self-correcting resin delivery pipe.

[0092] As a preferred embodiment, the number of the resin delivery branch pipes 16 is 6 to 20 groups.

[0093] like Figure 7 The actual arrangement of the resin delivery pipe in the separation tower is shown in the figure. As a preferred embodiment, the top surface of the resin delivery main pipe 15 has first mounting holes corresponding to the number of the plurality of resin delivery branch pipes 16 .

[0094] As a preferred embodiment, an installation cavity is formed inside the resin delivery mother tube 15. After one end of the multiple resin delivery branch tubes 16 extends into the installation cavity, second installation holes corresponding to the first installation holes are provided on the multiple resin delivery branch tubes 16. The resin delivery mother tube 15 and the multiple resin delivery branch tubes 16 are fixedly connected by the cooperation of the first installation hole and the second installation hole; the cooperation includes screw connection, bolt connection, anchor connection or flange connection, or other forms of mechanical connection, all of which are within the protection scope of the present invention.

[0095] Experiments and applications:

[0096] like Figure 8-9 The first working condition is the working condition that the water flow rate of the water inlet valve 1 of the separation tower is 120t / h, the number of pipe branches is 12, and the opening diameter is 40mm. Figure 10-11As shown, the first working condition is changed to the second working condition for verification. The second working condition corresponds to increasing the flow rate to 200t / h. Figure 10-11 As shown, even at the highest flow rate of 200t / h, the resin delivery can be maintained uniformly, fundamentally eliminating the resin cross contamination caused by uneven resin delivery and achieving the expected effect.

[0097] Embodiment 3

[0098] This embodiment provides an application of a self-correcting resin delivery pipe in a positive and negative resin separation process, wherein the positive and negative resin separation includes the separation of the positive and negative resins and the delivery of the resins after separation; including:

[0099] The stratification of anion and cation resins can be judged through the viewing window of the separation tower;

[0100] The delivery of resin after layering includes:

[0101] After the anion and cation resins are scrubbed in the separation tower, they are hydraulically separated. The operation steps are as follows: open the separation tower backwash drain valve 2 and the separation tower backwash inlet valve 6 to fully loosen the resins by hydraulic pressure for 5-15 minutes; close the separation tower backwash inlet valve 6 to continue separation for 5-15 minutes; close the separation tower backwash inlet valve 6 again to separate the resins at a small flow rate for 5-15 minutes, and close the separation tower backwash inlet valve 6 and the separation tower backwash drain valve 2; cycle the operation until the resins are fully separated, with the anion resin on the top and the cation resin on the bottom, and a clear boundary layer 12 between the anion and cation resins appears; transport the anion and cation resins to the anion and cation regeneration towers respectively through deionized water to prepare for the next regeneration step;

[0102] Open the anionic resin output valve 4 of the separation tower, open the anionic regeneration tower fat inlet door 8, open the separation tower forward wash water inlet valve 1, and transport the anionic resin in the separation tower to the anionic regeneration tower. After the anionic resin transportation is completed, close the separation tower forward wash water inlet valve 1, the separation tower anionic resin output valve 4 and the anionic regeneration tower fat inlet door 8; open the separation tower cation resin output valve 5, open the cation regeneration tower fat inlet door 9, open the separation tower forward wash water inlet valve 1, and transport the cation resin in the separation tower to the cation regeneration tower. After the cation resin transportation is completed, close the separation tower forward wash water inlet valve 1, the separation tower cation resin output valve 5 and the cation regeneration tower fat inlet door 9; transport the anionic and cation resins to the corresponding regeneration towers to prepare for the next step of regeneration;

[0103] The anion resin output valve 4 of the separation tower is located at the upper part of the resin boundary layer 12 of the separation tower; the cation resin output valve 5 of the separation tower is located at the bottom of the separation tower; the anion resin is collected in the separation tower through the anion resin delivery pipe and delivered to the anion regeneration tower through the anion resin output valve 4 of the separation tower, and the cation resin is collected by the cation resin delivery pipe and delivered to the cation regeneration tower through the cation resin output valve 5 of the separation tower.

[0104] In this embodiment, the cation and cation resin separation process is as follows:

[0105] 1. Anion and cation resin separation operation

[0106] Yin-yang resin separation includes the stratification of yin-yang resins and the transportation of resins after stratification. The stratification of yin-yang resins can be judged through the peep window of the separation tower. However, the transportation of yin-yang resins often results in poor resin separation effect due to lack of control measures and irregular operation. Figure 1 A schematic diagram showing that after performing the cation and yin resin separation operation according to the prior art solution, the cation and yin resins are not separated well, and the resin is poorly infected during the subsequent regeneration.

[0107] 2. Resin delivery operation

[0108] The transport operations of anion and cation resins are different. Figure 2 The following are explained respectively.

[0109] 1. After the yin and yang resins are scrubbed in the separation tower, they are hydraulically separated. The operation steps are as follows: open the separation tower backwash drain valve 2 and the separation tower backwash inlet valve 6 to fully loosen the resins by hydraulic pressure for 5-15 minutes; then close the separation tower backwash inlet valve 6 and continue to separate for 5-15 minutes; then close the separation tower backwash inlet valve 6 and separate for 5-15 minutes with a small flow rate, and close the separation tower backwash inlet valve 6 and the separation tower backwash drain valve 2; cycle the operation until the resins are fully separated, with the yin resin on the top and the cation resin on the bottom, and a clear boundary layer 12 between the yin and yang resins appears. Then, the yin and yang resins are transported to the yin and yang regeneration towers respectively through deionized water to prepare for the next regeneration step. The specific operation steps are as follows: open the anionic resin output valve 4 of the separation tower, open the anionic regeneration tower fat inlet door 8, open the separation tower positive wash water inlet valve 1, and transport the anionic resin in the separation tower to the anionic regeneration tower. After the anionic resin transportation is completed, close the separation tower positive wash water inlet valve 1, the separation tower anionic resin output valve 4, and the anionic regeneration tower fat inlet door 8; open the separation tower cation resin output valve 5, open the cation regeneration tower fat inlet door 9, open the separation tower positive wash water inlet valve 1, and transport the cation resin in the separation tower to the cation regeneration tower. After the cation resin transportation is completed, close the separation tower positive wash water inlet valve 1, the separation tower cation resin output valve 5, and the cation regeneration tower fat inlet door 9. Transport the anionic and cation resins to the corresponding regeneration towers to prepare for the next step of regeneration.

[0110] 2. Thorough separation of anion and cation resins is a key operation step to ensure the regeneration effect of condensate polishing, so a series of operations are set up. In order to avoid the output of anion resin without mixing with cation resin, the anion resin output valve 4 of the separation tower is located at the upper part of the resin boundary layer 12 of the separation tower, and the anion resin output position is prevented from mixing with cation resin during the anion resin delivery; the cation resin output valve 5 of the separation tower is located at the bottom of the separation tower; the resin of the thickness of about 15 cm above and below the anion and cation resin boundary layer 12 of the separation tower is retained to prevent the mixing of another resin close to the boundary layer during the anion and cation resin delivery process, causing cross infection of the resin.

[0111] 3. The negative resin is collected through the negative resin delivery pipe in the separation tower and delivered to the negative regeneration tower through the negative resin output valve 4 of the separation tower. The positive resin is collected through the positive resin delivery pipe and delivered to the positive regeneration tower through the positive resin output valve 5 of the separation tower. The resin delivery pipe in the separation tower is arranged in a hub-like manner, with a resin delivery mother pipe 15 in the middle, and 6 to 20 groups of resin delivery branch pipes 16 extending from the mother pipe, and uniform openings 17 on the branch pipes. Such a radial delivery arrangement makes the actual delivery area of ​​the resin from the center of the resin delivery mother pipe 15 to the edge of the separation tower, from large to small. Due to the strong fluidity of the resin, the resin is vortex-shaped in the separation tower during the delivery process. The closer to the center of the separation tower, the faster the resin delivery speed, the easier the resin is to be delivered, and the resin close to the tower wall is delivered the slowest. The overall delivery state of the resin in the separation tower is in the shape of a "funnel".

[0112] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above embodiments can be implemented by software, or by means of software plus necessary general hardware platforms. Based on such understanding, the technical solutions of the above embodiments can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for designing a self-correcting resin delivery pipe, characterized in that: The self-correcting resin delivery pipe comprises a resin delivery main pipe (15), a resin delivery branch pipe (16) and a resin delivery hole (17), including: S1, determining parameters of the resin delivery main pipe (15) and the resin delivery branch pipe (16), wherein the parameters of the resin delivery main pipe (15) include the diameter of the resin delivery main pipe; the parameters of the resin delivery branch pipe (16) include the number and diameter of the resin delivery branch pipes and the opening distribution of the resin delivery holes in the resin delivery branch pipes; S2, determining the parameters of the resin delivery hole (17), wherein the parameters of the resin delivery hole (17) include the pore diameter of the resin delivery hole.

2. According to claim 1, a method for designing a self-correcting resin delivery pipe is characterized in that: The design method of the opening distribution of the resin delivery holes in the resin delivery branch pipe includes: S11, calculate the open porosity of the resin at the separation tower interface, as shown in formula (1): Where: a represents the open porosity of the resin transport in the separation tower, pcs / m 2 ; l represents the number of resin delivery branches (16) in the separation tower; n represents the number of resin delivery holes (17) on each resin delivery branch (16), pcs / branch; R represents the diameter of the separation tower, i.e., the length of the resin delivery mother pipe (15), m; S12, dividing the resin separation tower into equidistant concentric circles based on the number of holes on the resin delivery branch pipe (16), and obtaining the number of openings in each concentric circle based on the porosity of the resin at the separation tower interface, as shown in formula (2): b=a×S i (2); Where: S i represents the area of ​​the i-th concentric circle, i ranges from 1 to 6, m 2 ; b represents the number of holes in each concentric circle, pieces; S13, according to the number of openings in each concentric circle and in accordance with the principle that the openings in each resin delivery mother tube are spaced as closely as possible, the number of holes on each resin delivery mother tube (15) is designed to achieve the same or similar resin flow area on each concentric circle.

3. A method for designing a self-correcting resin delivery pipe according to claim 2, characterized in that: The S2 includes: S21, measuring the aperture area on each resin delivery branch pipe (16), and calculating the average resin delivery area, as shown in formula (3): Where m represents the average resin delivery area in the separation tower, dimensionless; q represents the area of ​​each resin delivery hole in the resin delivery branch pipe in the separation tower, m 2 / pcs; l represents the number of resin delivery branch pipes (16) in the separation tower; n represents the number of resin delivery holes (17) on each resin delivery branch pipe (16), pcs / branch; R represents the diameter of the separation tower, i.e., the length of the resin delivery mother pipe (15), m; S22, based on the number of holes on the resin delivery branch pipe, the resin separation tower is divided into equidistant concentric circles, and the resin delivery area of ​​each concentric circle is determined based on the average resin delivery area, as shown in formula (4); the aperture of the resin delivery hole of the concentric circle is obtained according to the number of openings, as shown in formula (5): Q i =m×S i (4); In the formula, S i represents the area of ​​the i-th concentric circle, i ranges from 1 to 6, m 2 ;Q i Indicates the resin conveying area of ​​each concentric circle, i ranges from 1 to 6, m 2 ; Where, d i Indicates the diameter of the resin delivery hole on the resin delivery branch pipe in each concentric circle, i ranges from 1 to 6, m 2 ; S23, for each resin delivery branch pipe, based on the diameter of the resin delivery hole on the resin delivery branch pipe in each concentric circle, resin delivery holes with different diameters are opened in different concentric circles.

4. A self-correcting resin delivery pipe, wherein the structure and structural parameters of the self-correcting resin delivery pipe are determined based on the design method described in any one of claims 1 to 3, characterized in that: include: A resin delivery main pipe (15), a plurality of resin delivery branch pipes (16) and a resin delivery hole (17); wherein: The plurality of resin delivery branch pipes (16) are arranged in a hub-like manner starting from the center of the resin delivery mother pipe (15), and the resin delivery holes (17) are evenly distributed on the surface of the plurality of resin delivery branch pipes (16) at a certain interval, and are used to deliver negative resin or positive resin according to the installation position of the self-correcting resin delivery pipe.

5. The self-correcting resin delivery pipe according to claim 4, characterized in that: The resin delivery branch pipes (16) are in groups of 6 to 20.

6. The self-correcting resin delivery pipe according to claim 5, characterized in that: The top surface of the resin delivery mother pipe (15) has first mounting holes corresponding to the number of the plurality of resin delivery branch pipes (16).

7. The self-correcting resin delivery pipe according to claim 6, characterized in that: The resin delivery mother tube (15) has an installation cavity formed inside, one end of each of the plurality of resin delivery branch tubes (16) extends into the installation cavity, and a second installation hole corresponding to the first installation hole is provided on the portion of the plurality of resin delivery branch tubes (16) extending into the installation cavity, and the resin delivery mother tube (15) and the plurality of resin delivery branch tubes (16) are fixedly connected by the cooperation of the first installation hole and the second installation hole.

8. The self-correcting resin delivery pipe according to claim 7, characterized in that: The cooperation includes screw connection, bolt connection, anchor connection or flange connection.

9. Application of a self-correcting resin delivery pipe in a positive and negative resin separation process, characterized in that: The separation of the anion and cation resins includes the stratification of the anion and cation resins and the transportation of the resins after stratification.

10. The use of a self-correcting resin delivery pipe according to claim 9 in a positive and negative resin separation process, characterized in that: The stratification of the anion and cation resins is judged through the viewing window of the separation tower; The resin delivery after the delamination includes: After the anion and cation resins are scrubbed in the separation tower, they are hydraulically stratified: the separation tower backwash drain valve (2) and the separation tower backwash inlet valve (6) are opened to fully loosen the resins by hydraulic pressure for 5-15 minutes; the separation tower backwash inlet valve (6) is closed to continue stratification for 5-15 minutes; the separation tower backwash inlet valve (6) is closed again to stratify at a small flow rate for 5-15 minutes, and the separation tower backwash inlet valve (6) and the separation tower backwash drain valve (2) are closed; the cycle is repeated until the resins are fully stratified, with the anion resin on the top and the cation resin on the bottom, and a clear boundary layer (12) of the anion and cation resins appears; the anion and cation resins are respectively transported to the anion and cation regeneration towers by deionized water to prepare for the next step of regeneration; Open the anionic resin output valve (4) of the separation tower, open the anionic regeneration tower fat inlet door (8), open the separation tower forward wash water inlet valve (1), and transport the anionic resin in the separation tower to the anionic regeneration tower. After the anionic resin transport is completed, close the separation tower forward wash water inlet valve (1), separate the tower anionic resin output valve (4) and the anionic regeneration tower fat inlet door (8); open the separation tower cation resin output valve (5), open the cation regeneration tower fat inlet door (9), open the separation tower forward wash water inlet valve (1), and transport the cation resin in the separation tower to the cation regeneration tower. After the cation resin transport is completed, close the separation tower forward wash water inlet valve (1), the separation tower cation resin output valve (5) and the cation regeneration tower fat inlet door (9); transport the anionic and cation resins to the corresponding regeneration towers to prepare for the next step of regeneration; The anion resin output valve (4) of the separation tower is located at the upper part of the resin boundary layer (12) of the separation tower; the cation resin output valve (5) of the separation tower is located at the bottom of the separation tower; the anion resin is collected in the separation tower through the anion resin delivery pipe and delivered to the anion regeneration tower through the anion resin output valve (4) of the separation tower, and the cation resin is collected by the cation resin delivery pipe and delivered to the cation regeneration tower through the cation resin output valve (5) of the separation tower.

Images