阅读说明：本技术 软水机的交换树脂的再生工艺 (Regeneration process of exchange resin of water softener ) 是由 林和坤 瞿亚明 辛俊 郑超 于 2020-04-14 设计创作，主要内容包括：本发明公开了一种软水机的交换树脂的再生工艺,其包括步骤：S1、吸盐过程,其中,树脂层完全充满盐液所用时间为单次充盈时长T<Sub>i</Sub>；S2、关闭过程,关闭排水和出水的时间为单次关闭时长t<Sub>0</Sub>；S3、判断实际吸盐时长T和单次充盈时长T<Sub>i</Sub>的大小,若实际吸盐时长T小于等于单次充盈时长T<Sub>i</Sub>,则进入步骤S5,否则进入步骤S4；S4、将实际吸盐时长T与单次充盈时长T<Sub>i</Sub>的差值T<Sub>e</Sub>,更新为新的实际吸盐时长T,并返回执行步骤S1和S2；S5、慢冲洗过程。该再生工艺利用通常的加盐设备,通过多路控制阀智能控制吸盐过程和关闭过程,使得树脂与盐液充分地接触达到推荐的接触时间,节省了盐液,提高了经济效益。(The invention discloses a regeneration process of exchange resin of a water softener, which comprises the following steps: s1, salt absorption process, wherein the time for the resin layer to be completely filled with the salt solution is the single filling time length T i (ii) a S2, closing process, wherein the time for closing the drainage and the water outlet is the single closing time length t 0 (ii) a S3, judging the actual salt absorption time length T and the single filling time length T i If the actual salt absorption time length T is less than or equal to the single filling time length T i If not, go to step S5, otherwise go to step S4; s4, setting the actual salt absorption time length T and the single filling time length T i Difference value T of e Updating the actual salt absorption time length T to be a new actual salt absorption time length T, and returning to execute the steps S1 and S2; s5, slow rinsing process. The regeneration process utilizes common salt adding equipment, intelligently controls the salt absorption process and the closing process through a multi-way control valve, enables resin to be fully contacted with salt solution for the recommended contact time, saves the salt solution, and improves the economic benefit.)

1. A regeneration process of exchange resin of a water softener is characterized by comprising the following steps:

s1, salt absorption process, wherein the time for the resin layer to be completely filled with the salt solution is the single filling time length T_i；

S2, closing process, wherein the time for closing the drainage and the water outlet is the single closing time length t₀；

S3, judging the actual salt absorption time length T and the single filling time length T_iIf the actual salt absorption time length T is less than or equal to the single filling time length T_iIf not, go to step S5, otherwise go to step S4;

s4, setting the actual salt absorption time length T and the single filling time length T_iDifference value T of_eUpdating the actual salt absorption time length T to be a new actual salt absorption time length T, and returning to execute the steps S1 and S2;

s5, slow rinsing process.

2. The process for regenerating exchange resin of water softener according to claim 1, wherein the single filling time period T in step S1_i，T_i＝BV·L_jx/Q，

Wherein BV is the amount of resin, L_jxQ is the clearance rate in the resin bed and Q is the outlet flow of the salt solution injector.

3. The process for regenerating exchange resin of water softener according to claim 2, wherein in step S2, the time period t of single-time closing₀，

Wherein q is the ideal outlet flow of the salt liquid ejector.

4. The process for regenerating the exchange resin of a water softener as set forth in claim 3, wherein the desired outlet flow q of the salt solution injector is converted from the amount of resin.

5. The process for regenerating the exchange resin of a water softener as set forth in claim 1, wherein in the step S3\ S4, the initial actual salt absorption time period T,

wherein, W_saltIn terms of salt consumption rate, Q is the outlet flow of the salt liquid ejector, BV is the resin amount,

C_brinethe concentration of the salt solution and the density of the salt solution.

6. The process for regenerating an exchange resin of a water softener according to claim 1, wherein the difference T is judged in step S4_eAnd a single filling duration T_iThe size of (a), wherein,

if the difference T_eLess than a single filling duration T_iThen, when returning to step S1, the single filling duration T is made_iIs reduced by and equal to the difference T_e；

If the difference T_eGreater than or equal to a single filling duration T_iThen return to the execution stepIn step S1, the original single filling time period T is maintained_i。

7. The process for regenerating the exchange resin of the water softener according to the claim 1, wherein the salt absorption process is that the multi-way control valve is in the salt absorption position in the step S1.

8. The process for regenerating exchange resin of a water softener according to claim 1, wherein the closing process is that the multi-way control valve is in a closed position in step S2.

9. The process for regenerating the exchange resin of a water softener according to claim 1, wherein the resin filling amount of the water softener is 8 liters or less.

Technical Field

The invention relates to a regeneration process of exchange resin of a water softener.

Background

The water softener is filled with ion exchange resin for removing hardness ions in water to soften the water, but after the resin is saturated and fails, the resin needs to be reduced by a regenerant to recover the softening function, which is generally called regeneration. The regeneration process comprises the following steps: salt absorption, slow flushing, backwashing, forward washing and the like, and then returning to the running water production state. In order to ensure the best and reasonable cost performance, resin manufacturers generally recommend a series of regeneration technical requirements such as the best salt consumption level, salt solution concentration, salt solution flow, slow flushing water quantity and the like so as to obtain the best salt consumption efficiency, namely the maximum working exchange capacity.

At present, household water softeners gradually develop miniaturization, and the filled resin amount is less and less. Current regeneration processes and equipment can only handle resin quantities above 8 liters, and to handle resin quantities of 8 liters and below, even if regeneration process control is optimal, salt consumption efficiency is only 50% of that of a typical water softener. One important reason is that the regeneration requirement can be met only by the short contact time between the salt solution and the resin, incomplete resin regeneration or flushing with a large amount of salt solution, which is caused by the small amount of resin, the extremely small amount of salt, and the salt solution flow of the salt solution injector which cannot be further reduced.

The existing product can solve the problems through a micro salt solution ejector or a micro salt adding pump, but the existing product cannot be used in a large scale due to the manufacturing and processing problems, needs to use excessive salt solution, sacrifices the economy, and causes environmental pollution due to the excessive salt solution.

Disclosure of Invention

The invention aims to overcome the defects of high salt solution consumption or incomplete resin regeneration in the regeneration process of resin in the prior art, and provides a regeneration process of exchange resin of a water softener.

The invention solves the technical problems through the following technical scheme:

a regeneration process of exchange resin of a water softener comprises the following steps:

s1, a salt absorption process, wherein,the time for the resin layer to be completely filled with the salt solution is the single filling time length T_i；

S2, closing process, wherein the time for closing the drainage and the water outlet is the single closing time length t₀；

S3, judging the actual salt absorption time length T and the single filling time length T_iIf the actual salt absorption time length T is less than or equal to the single filling time length T_iIf not, go to step S5, otherwise go to step S4;

s4, setting the actual salt absorption time length T and the single filling time length T_iDifference value T of_eUpdating the actual salt absorption time length T to be a new actual salt absorption time length T, and returning to execute the steps S1 and S2;

s5, slow rinsing process.

In the scheme, the regeneration process utilizes the existing salt adding equipment, and the actual salt absorption time length T and the single filling time length T in the step S3\ S4_iComparing, and using the difference T between the two_eAnd T_iThe relationship between the salt absorption process and the closing process realizes the multiple circulation of the salt absorption process and the closing process, ensures that the resin is fully contacted with the salt solution, ensures that the salt solution and the resin reach the optimal contact time, saves the salt solution, protects the environment and improves the economic benefit.

Preferably, in step S1, the single filling duration T_i，T_i＝BV·L_jx/Q，

Wherein BV is the amount of resin, L_jxQ is the clearance rate in the resin bed and Q is the outlet flow of the salt solution injector.

In this scheme, utilize salt solution sprayer to fill salt solution toward the resin layer, long time T is sufficient when single is sufficient_iThe time it takes for the resin bed to fill with the salt solution.

Preferably, in step S2, the single-off duration t₀，

Wherein q is the ideal outlet flow of the salt liquid ejector.

In this scheme, the resin volume that small-size water softener needs the regeneration is few, and the flow of current salt equipment that adds can't satisfy minimum flow requirement, therefore sets up to close for a long time, ensures that resin and salt solution fully contact, improves regeneration efficiency.

Preferably, the ideal outlet flow q of the salt solution injector is converted from the resin amount.

In the scheme, resins produced by different resin manufacturers have recommended regeneration process requirements with the best cost performance, and the ideal outlet flow q of the salt liquid ejector can be calculated according to the regenerated resin amount and the process requirements.

Preferably, in step S3\ S4, the initial actual salt absorption time period T,

wherein, W_saltIn terms of salt consumption, Q is the outlet flow of the salt liquid ejector, BV is the resin amount, C_brineThe concentration of the salt solution and the density of the salt solution.

In the scheme, once the amount of the resin to be regenerated and the salt adding equipment are determined, the initial actual salt absorption time T can be calculated through the formula, the contact time of the salt solution and the resin is not less than T, and the incomplete regeneration of the resin is avoided.

Preferably, in step S4, the difference T is determined_eAnd a single filling duration T_iThe size of (a), wherein,

if the difference T_eLess than a single filling duration T_iThen, when returning to step S1, the single filling duration T is made_iIs reduced by and equal to the difference T_e；

If the difference T_eGreater than or equal to a single filling duration T_iIf the operation returns to step S1, the original single filling duration T is maintained_i。

In this scheme, the last cycle is performed due to T_eLess than T_iWithout having to perform a single complete filling duration T_iThus will be a single filling duration T_iIs reduced by and equal to the difference T_eThe filling time of the salt solution can be reduced, the salt solution is saved, and the economic benefit is improved. Keeping the original single filling duration T_iThe salt adding equipment can be utilized to the maximum extent, the cycle number of the regeneration process is reduced, and the regeneration efficiency is improved.

Preferably, in step S1, the salt absorption process is that the multi-way control valve is in the salt absorption position.

In the scheme, when the multi-way control valve is switched to the salt absorption position, the resin layer is filled with the salt solution until the set time T is reached_i。

Preferably, in step S2, the closing process is that the multi-way control valve is in a closed position.

In the scheme, when the multi-way control valve is in a closed position, the water inlet and the water outlet of the multi-way control valve are kept closed at the same time until the set time t is reached₀The salt solution is fully contacted with the resin layer, and the optimal regeneration efficiency is realized.

Preferably, the resin filling amount of the water softener is less than or equal to 8 liters.

In the scheme, the regeneration process of the exchange resin mainly aims at the water softeners with the fat filling quantity of 8 liters or less, and the existing salt adding equipment of the water softeners with the resin volume of more than 8 liters can solve the problem.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows: the regeneration process utilizes the existing salt adding equipment, and the actual salt absorption time length T and the single filling time length T in the step S3\ S4_iComparing, and using the difference T between the two_eAnd T_iThe relationship between the two parts realizes the multiple circulation of the salt absorption process and the closing process, ensures that the resin is fully contacted with the salt solution, ensures that the salt solution and the resin reach the optimal contact time, thoroughly regenerates the resin, saves the salt solution, protects the environment and improves the economic benefit.

Drawings

FIG. 1 is a flow chart illustrating a regeneration process of an exchange resin of a water softener according to a preferred embodiment of the present invention.

Detailed Description

The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.

As shown in fig. 1, the present embodiment discloses a regeneration process of an exchange resin of a water softener, which includes:

step S1, salt absorption process, wherein the time for the resin layer to be completely filled with the salt solution is the single filling time length T_i。

In this embodiment, the salt absorption process is a process in which the multi-way control valve is in the salt absorption position and the resin layer is kept filled with the salt solution. The resin amount that small-size water softener needs regeneration is few, and current salt equipment that adds can' T satisfy minimum flow requirement, utilizes current salt solution ejector to fill salt solution to the resin layer, and the time that the salt solution was full of the resin layer spent is long time T when once is full of_i. Single filling duration T_iAccording to the formula

T_i＝BV·L_jx/Q

Calculated, wherein BV is the resin amount, L_jxThe void ratio L in a conventional resin layer is the void ratio L in the resin layer_jx36% and Q is the outlet flow of the salt solution ejector.

Step S2, closing process, wherein the time for closing the drainage and the water outlet is a single closing time length t₀。

In this embodiment, the closing process is with the multiplex control valve in the closed position. At the same time, the water inlet and the water outlet of the multi-way control valve are kept closed at the same time until the set single closing time length t is reached₀The salt solution is fully contacted with the resin layer, and the optimal regeneration efficiency is realized. Single off duration t₀According to the formula

And calculating to obtain the flow rate of the salt liquid, wherein q is the ideal outlet flow rate of the salt liquid ejector. The resins produced by different resin manufacturers have the recommended regeneration process requirement with the best cost performance, and the ideal outlet flow q of the salt liquid ejector can be converted according to the regenerated resin quantity and the process requirement. The closing time is set to ensure that the resin is fully contacted with the salt solution, and the regeneration efficiency is improved.

Step S3, judging the actual salt absorption time length T and the single filling time length T_iThe size of (2). If the actual salt absorption time T is less than or equal to the single filling time T_iIf yes, the process jumps out of the cycle and enters a step S5, and the process enters a slow flushing state to complete regeneration; otherwise, the process goes to step S4 and loops again.

In this embodiment, once the amount of the resin to be regenerated and the salt adding equipment are determined, the initial actual salt absorption time T can be calculated, so as to ensure that the contact time between the salt solution and the resin is not less than T, and avoid incomplete regeneration of the resin. The initial actual salt absorption time T is according to the formula

Is calculated, wherein W_saltIn terms of salt consumption, Q is the outlet flow of the salt liquid ejector, BV is the resin amount, C_brineThe concentration of the salt solution and the density of the salt solution.

The actual salt absorption time length T and the single filling time length T_iDifference value T of_eAnd updating to a new actual salt absorption time length T, and returning to execute the steps S1 and S2.

Step S4, judging the actual salt absorption time length T and the single filling time length T_iDifference value T of_eAnd a single filling duration T_iThe size of (2).

If the difference T_eLess than a single filling duration T_iThen make a single filling duration T_iIs reduced by and equal to the difference T_e(ii) a And the actual salt absorption time length T and the single filling time length T_iDifference value T of_eAnd updating the actual salt absorption time length T to a new actual salt absorption time length T, and returning to execute the steps S1 and S2. At the last cycle, because of T_eLess than T_iWithout having to perform a single complete filling duration T_iThus will be a single filling duration T_iIs reduced by and equal to the difference T_eThe filling time of the salt solution can be reduced, the salt solution is saved, and the economic benefit is improved.

If the difference T_eGreater than or equal to a single filling duration T_iThen the original single time is keptFilling duration T_i(ii) a The actual salt absorption time length T and the single filling time length T_iDifference value T of_eAnd updating the actual salt absorption time length T to a new actual salt absorption time length T, and returning to execute the steps S1 and S2. Multiple maintenance of original single filling duration T_iThe salt adding equipment can be utilized to the maximum extent, the cycle number of the regeneration process is reduced, and the regeneration efficiency is improved.

Step S5, slow flush procedure.

In this embodiment, the multi-way control valve is switched to the slow flush position, and the slow flush process needs to be maintained for a certain time period, which is related to the recommended slow flush water amount and the actual slow flush flow. The slow flushing process is followed by backwashing, forward washing, water injection and the like. After regeneration is finished, the controller controls the multi-way control valve to automatically switch and keep the water making position, intelligent operation is achieved, and simplicity and convenience are achieved.

To facilitate understanding of the regeneration process of the present embodiment, three examples are described below:

example 1 setting the actual salt absorption time T to 2 minutes and the single filling time T_iIs 3 minutes, due to T<T_iThen, the flow goes from step S3 to step S5 to enter the slow flushing state, and the regeneration is completed.

Example 2 setting the actual salt absorption time T to 5 minutes and the single filling time T_iIs 3 minutes, due to T_e＝T-T_i2 min-5-3, T_e<T_iStep S4 is executed to convert the original T into_iIs updated to the difference value T in 3 minutes_eWhile updating the value of the actual salt absorption time period T to T_e2 minutes, and returns to the execution of steps S1 and S2, and goes to the next cycle.

Example 3 setting the actual salt absorption time T to 7 minutes and the single filling time T_iIs 3 minutes, due to T_e＝T-T_i＝7-3＝4，T_e>T_iThen step S4 is executed to get T_iThe value of (3) is kept constant, and the value of the actual salt absorption time period T is updated to T_e4 minutes, returns to execute steps S1 and S2, and moves to the next cycle.

At present, water softeners with a resin fill of 8 liters or less are utilizedThe existing salt adding equipment has low regeneration efficiency. The regeneration process of the embodiment utilizes the existing salt adding equipment to perform the actual salt absorption time period T and the single filling time period T in the steps S3\ S4_iComparing, and using the difference T between the two_eAnd T_iThe relationship between the salt absorption process and the closing process realizes the multiple circulation of the salt absorption process and the closing process, ensures that the resin is fully contacted with the salt solution, ensures that the salt solution and the resin reach the optimal contact time, saves the salt solution, protects the environment and improves the economic benefit.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.