阅读说明：本技术 一种气体压缩存储系统及控制方法 (Gas compression storage system and control method ) 是由 韩占华 张成彦 于 2021-06-16 设计创作，主要内容包括：一种气体压缩存储系统,包括：供气模块、气柜、进气管路、压缩机模块、出气管路、检测模块和压缩控制模块；压缩机模块包括进气端、出气端和并联在进气端和出气端之间的多个压缩机；供气模块、气柜、进气管路和进气端依次连接,出气端与出气管路连接。压缩控制模块可根据检测模块的检测值实时掌控气柜内的气体容纳量,从而通过对压缩机模块中各压缩机的独立控制来调节压缩机模块的总功率,使得压缩机模块的总吸气量与气柜的出气量相适应,保证气柜进气量和出气量的平衡,避免气柜过瘪导致压缩机模块工作不稳定,或者气柜内气体容纳量过大导致气体泄漏的风险。(A gas compression storage system comprising: the device comprises an air supply module, an air cabinet, an air inlet pipeline, a compressor module, an air outlet pipeline, a detection module and a compression control module; the compressor module comprises an air inlet end, an air outlet end and a plurality of compressors connected between the air inlet end and the air outlet end in parallel; the air supply module, the air cabinet, the air inlet pipeline and the air inlet end are sequentially connected, and the air outlet end is connected with the air outlet pipeline. The compression control module can control the gas holding capacity in the gas holder in real time according to the detected value of the detection module, thereby the total power of the compressor module is adjusted through the independent control of each compressor in the compressor module, the total suction capacity of the compressor module is adapted to the gas output capacity of the gas holder, the balance of the gas holder air input and the gas output capacity is ensured, the gas holder is prevented from working unstably due to the fact that the gas holder is too flat, or the risk of gas leakage due to too large gas holding capacity in the gas holder is avoided.)

1. A gas compression storage system, comprising: the device comprises an air supply module, an air cabinet, an air inlet pipeline, a compressor module, an air outlet pipeline, a detection module and a compression control module;

the compressor module comprises an air inlet end, an air outlet end and a plurality of compressors connected between the air inlet end and the air outlet end in parallel; the gas supply module, the gas cabinet, the gas inlet pipeline and the gas inlet end are sequentially connected, and the gas outlet end is connected with the gas outlet pipeline; the gas supply module supplies gas to the gas cabinet, the gas in the gas cabinet enters the compressor module through the gas inlet pipeline for compression, and the compressed gas is output through the gas outlet pipeline;

the detection module is used for detecting the gas containing quantity in the gas holder or a variable which changes synchronously with the gas containing quantity; the compression control module is respectively connected with each compressor and used for controlling the working state of each compressor according to the detection value of the detection module.

2. The gas compression storage system of claim 1, wherein the gas cabinet height is in a positive relationship with the gas capacity in the gas cabinet; the detection module adopts a height sensor for detecting the height of the gas holder, and is arranged outside the gas holder; and the compression control module is used for controlling the working state of each compressor according to the height of the gas holder detected by the detection module.

3. The gas compression storage system according to claim 2, wherein a plurality of threshold intervals and compression power values corresponding to the threshold intervals one to one are preset in the compression control module; the compression control module is used for acquiring a compression power value corresponding to a threshold interval where a detection value of the detection module is located as a power target value and controlling the working state of each compressor according to the power target value.

4. The gas compression storage system of claim 3, wherein each threshold interval is further associated with a corresponding power frequency quantity; the compression control module is used for acquiring the power frequency quantity corresponding to the threshold interval where the detection value of the detection module is located as a target quantity, the maximum value of the target quantity plus 1 is equal to the quantity of the compressors in the compressor module, the compression control module is used for controlling the compressors of which the quantity is the target quantity to execute a power frequency working state and controlling one compressor to execute a frequency conversion working state, and the working power of the compressor in the frequency conversion working state is equal to the sum of the power target value minus the working power of the compressors in all the power frequency working states.

5. The gas compression storage system of claim 1, wherein the compressor module includes 3 compressors.

6. The gas compression storage system of claim 1, wherein a balancing valve is further connected between the input and output of each compressor.

7. The gas compression storage system of claim 6, wherein the balancing valve is a solenoid valve and is connected to the compression control module; and under the condition that the power target value is the minimum compression power value, when the air inlet quantity of any compressor is smaller than the air outlet quantity, the compression control module controls the conduction of a balance valve corresponding to the compressor.

8. A control method applied to the gas compression storage system according to any one of claims 1 to 4, characterized by comprising the steps of:

s1, setting a plurality of threshold intervals, wherein each threshold interval is associated with a corresponding power frequency quantity and a corresponding compression power value, and the compression power values and the threshold intervals are in one-to-one correspondence and positive correlation; the power frequency quantity and the threshold interval present a one-to-one or one-to-many relationship; the minimum value in the compression power values is a lower limit value, and the maximum value in the compression power values is an upper limit value;

s2, acquiring a compression power value and a power frequency quantity corresponding to a threshold interval where a detection value of the detection module is located, wherein the compression power value and the power frequency quantity are respectively recorded as a target power value and a target quantity;

s3, controlling the compressors of the corresponding number to execute the power frequency working state according to the target number, and calculating the difference value obtained by subtracting the working power of the compressors under all the power frequency working states from the target power value to be recorded as a residual target value;

and S4, controlling any compressor in the non-power frequency working state to enter a frequency conversion working state, executing a residual target value, and controlling the residual compressor to stop working.

9. The method of claim 8, wherein the power frequency power of each compressor is equal;

or, each compressor is provided with a priority weight, the priority weight of each compressor is in a positive relation with the corresponding power frequency, and in step S3, each compressor is controlled to execute the power frequency working state according to the sequence of the priority weights from small to large until the number of the compressors in the power frequency working state reaches the target number.

10. A method of controlling a gas compression storage system as claimed in claim 8, wherein a balancing valve is connected between the inlet and the outlet of each compressor; the control method is further provided with the following steps after step S4:

s5, detecting whether a compressor with the air inlet quantity smaller than the air outlet quantity exists or not;

s6, if not, the time delay returns to the step S2; if yes, judging whether the currently executed target power value is the minimum compression power value;

s7, if not, the time delay returns to the step S2; if so, the balance valve connected in parallel with the compressor with the air inlet quantity smaller than the air outlet quantity is controlled to be conducted.

Technical Field

The invention relates to the field of gas compression, in particular to a gas compression storage system and a control method.

Background

In the industrial production process, a plurality of special gases are involved, for example, chloromethane is colorless and combustible toxic gas, can form explosive mixture with air, is mainly used for producing organic silicon compounds, and is widely used as a solvent and an extracting agent, and producing pesticides, medicines, spices and the like. Some industrial processes also produce methyl chloride as a by-product, such as the production of trichlorfon, chloral, and phosphamide.

The harmful gases are washed with water and acid in the production and transportation process, then transported to a gas storage cabinet, compressed and condensed by a compressor, frozen, liquefied and stored in a steel cylinder. The gas holder is often arranged on the conveying path to serve as a buffer, the gas volume height of the gas holder is kept stable, and the deformation of the tank body caused by the evacuation of the compressor is prevented. However, in the prior art, it is difficult to ensure the stability of the gas amount on the transportation path, that is, to ensure the safety of the gas holder, due to the variation of the gas generation speed, the gas transportation speed, and the like.

Disclosure of Invention

In order to overcome the defect that a safe special gas compression system is lacked in the prior art, the invention provides a gas compression storage system and a control method.

One of the purposes of the invention adopts the following technical scheme:

a gas compression storage system comprising: the device comprises an air supply module, an air cabinet, an air inlet pipeline, a compressor module, an air outlet pipeline, a detection module and a compression control module;

the compressor module comprises an air inlet end, an air outlet end and a plurality of compressors connected between the air inlet end and the air outlet end in parallel; the gas supply module, the gas cabinet, the gas inlet pipeline and the gas inlet end are sequentially connected, and the gas outlet end is connected with the gas outlet pipeline; the gas supply module supplies gas to the gas cabinet, the gas in the gas cabinet enters the compressor module through the gas inlet pipeline for compression, and the compressed gas is output through the gas outlet pipeline;

the detection module is used for detecting the gas containing quantity in the gas holder or a variable which changes synchronously with the gas containing quantity; the compression control module is respectively connected with each compressor and used for controlling the working state of each compressor according to the detection value of the detection module.

Preferably, the height of the gas holder is in a positive relationship with the gas containing amount in the gas holder; the detection module adopts a height sensor for detecting the height of the gas cabinet, and is arranged outside the gas cabinet; and the compression control module is used for controlling the working state of each compressor according to the height of the gas holder detected by the detection module.

Preferably, a plurality of threshold intervals and compression power values corresponding to the threshold intervals one to one are preset in the compression control module; the compression control module is used for acquiring a compression power value corresponding to a threshold interval where a detection value of the detection module is located as a power target value, and controlling the working state of each compressor according to the power target value.

Preferably, each threshold interval is also associated with a corresponding power frequency quantity; the compression control module is used for acquiring the power frequency quantity corresponding to the threshold interval where the detection value of the detection module is located as a target quantity, the maximum value plus 1 of the target quantity is equal to the quantity of compressors in the compressor module, the compression control module is used for controlling the compressors of which the quantity is the target quantity to execute a power frequency working state and controlling one compressor to execute a frequency conversion working state, and the working power of the compressor in the frequency conversion working state is equal to the sum of the power target value minus the working power of the compressors in all the power frequency working states.

Preferably, the compressor module comprises 3 compressors.

Preferably, a balancing valve is connected between the input and output of each compressor.

Preferably, the balance valve adopts an electromagnetic valve and is connected with the compression control module; and under the condition that the power target value is the minimum compression power value, when the air inlet quantity of any compressor is smaller than the air outlet quantity, the compression control module controls the conduction of a balance valve corresponding to the compressor.

The second purpose of the invention adopts the following technical scheme:

a control method suitable for the gas compression storage system comprises the following steps:

s1, setting a plurality of threshold intervals, wherein each threshold interval is associated with a corresponding power frequency quantity and a corresponding compression power value, and the compression power values and the threshold intervals are in one-to-one correspondence and positive correlation; the power frequency quantity and the threshold interval present a one-to-one or one-to-many relationship; the minimum value in the compression power values is a lower limit value, and the maximum value in the compression power values is an upper limit value;

s2, acquiring a compression power value and a power frequency quantity corresponding to a threshold interval where a detection value of the detection module is located, wherein the compression power value and the power frequency quantity are respectively recorded as a target power value and a target quantity;

s3, controlling the compressors of the corresponding number to execute the power frequency working state according to the target number, and calculating the difference value obtained by subtracting the working power of the compressors under all the power frequency working states from the target power value to be recorded as a residual target value;

and S4, controlling any compressor in the non-power frequency working state to enter a frequency conversion working state, executing the residual target value, and controlling the residual compressors to stop working.

Preferably, the power frequency power of each compressor is equal;

or, each compressor is provided with a priority weight, the priority weight of each compressor is in a positive relation with the corresponding power frequency, and in step S3, each compressor is controlled to execute the power frequency working state according to the sequence of the priority weights from small to large until the number of the compressors in the power frequency working state reaches the target number.

Preferably, a balance valve is connected between the input port and the output port of each compressor; the control method is further provided with the following steps after step S4:

s5, detecting whether a compressor with the air inlet quantity smaller than the air outlet quantity exists or not;

s6, if not, the time delay returns to the step S2; if yes, judging whether the currently executed target power value is the minimum compression power value;

s7, if not, the time delay returns to the step S2; if so, the balance valve connected in parallel with the compressor with the air inlet quantity smaller than the air outlet quantity is controlled to be conducted.

The invention has the advantages that:

(1) the compression control module can control the gas holding capacity in the gas holder in real time according to the detected value of the detection module, thereby adjusting the total power of the compressor module through the independent control of each compressor in the compressor module, ensuring the total suction capacity of the compressor module to be adapted to the gas output capacity of the gas holder, ensuring the balance of the gas inlet and outlet capacity of the gas holder, avoiding the gas holder from working unstably due to the over-shrinkage of the gas holder or preventing the risk of gas leakage due to the over-large holding capacity in the gas holder.

(2) The detection module adopts a height sensor for detecting the height of the gas holder, and the detection module is arranged outside the gas holder, so that the damage of special gas in the gas holder to the detection module is avoided, the risk of gas holder leakage caused by the requirements of wiring of the detection module and the like is avoided, and meanwhile, the communication between the detection module and the compression control module is also facilitated.

(3) Through the incidence relation between the threshold interval and the compression power, the power target value corresponding to the detection value of the detection module can be directly obtained, and the adaptation of the total power of the compressor module to the working condition is favorably ensured. Meanwhile, the compression power is set according to the threshold interval, so that the compressor modules all adopt the same total power when the internal gas containing capacity of the gas holder is within a certain range, the gas circuit safety is ensured, and the instability caused by frequent adjustment of the compressor power by the compressor modules is avoided.

(4) Through the matching of the compressor in the power frequency working state and the compressor in the variable frequency working state, the real-time control of each compressor is avoided, and the work load of the compression control module is reduced; and the compressor enters a power frequency working state, so that the working stability of the compressor is ensured, and the service life of the compressor is prolonged.

(5) A balance valve is connected between the input port and the output port of each compressor. So, when the air input of compressor is less than the air output, can open the balanced valve, through the gaseous backward flow of the compressed gas of compressor delivery outlet output, guarantee the balance of compressor air input and air output to guarantee the compressor and normally work.

(6) The balance valve is intelligently controlled through the compression control module, and the automatic balance of air inlet and outlet of each compressor is realized. The compression control module guarantees the balance of air inlet and outlet of the compressor under the condition of maintaining the working power of the compressor unchanged through the balance valve, so that the compressor module adjusts the power according to the state of the air cabinet, the state of the compressor module is prevented from reacting on the air cabinet, the unidirectional correlation of the air cabinet and the compressor is realized, the control accuracy of the whole system is improved, and the control difficulty and the error-prone degree are reduced.

(7) Each compressor is provided with a priority weight, the priority weight of each compressor and the corresponding power frequency form a positive relation, and when the total power of the compressor module is adjusted, a wider power adjusting range can be realized through the combination of the compressors with different power frequency powers; meanwhile, the compressor with smaller power frequency power is preferably selected to enter the working state, so that the total consumption of the compressor module is reduced.

Drawings

FIG. 1 is a schematic diagram of a gas compression storage system according to the present invention;

fig. 2 is a schematic structural diagram of another gas compression storage system according to the present invention.

Detailed Description

The gas compression storage system provided by the embodiment comprises: the device comprises an air supply module, an air cabinet, an air inlet pipeline, a compressor module, an air outlet pipeline, a detection module and a compression control module.

The compressor module includes an inlet end, an outlet end, and a plurality of compressors connected in parallel between the inlet end and the outlet end. Therefore, the total power of the compressor module can be controlled by controlling the working state of each compressor, so that the compressor module can adapt to different working condition requirements. The air supply module, the air cabinet, the air inlet pipeline and the air inlet end are connected in sequence, and the air outlet end is connected with the air outlet pipeline. The gas supply module supplies gas to the gas holder, the gas in the gas holder enters the compressor module through the gas inlet pipeline to be compressed, and the compressed gas is output through the gas outlet pipeline. In particular implementations, various devices for treating the gas may be included in the air intake conduit.

The detection module is used for detecting the gas containing amount in the gas holder or the variable which changes synchronously with the gas containing amount, for example, when the gas holder is of a soft structure, the gas containing amount in the gas holder can be indirectly obtained by measuring the volume of the gas holder or a certain parameter which changes along with the change of the internal gas containing amount, such as the height of the gas holder. The compression control module is respectively connected with each compressor and used for controlling the working state of each compressor according to the detection value of the detection module.

In this embodiment, the compression control module can control the gas holding capacity in the gas cabinet in real time according to the detection value of detection module, thereby adjust the total power of compressor module through the independent control to each compressor in the compressor module, make the total air intake of compressor module and the gas output of gas cabinet suit, guarantee the balance of gas cabinet business turn over tolerance, avoid the gas cabinet to cross flat compressor module work unstability that leads to, perhaps the too big risk that leads to gas leakage of gas holding capacity in the gas cabinet.

Specifically, in the present embodiment, the height of the gas holder and the gas containing amount in the gas holder are in a positive relationship, that is, the gas containing amount in the gas holder can be determined by the height of the gas holder. The detection module adopts a height sensor for detecting the height of the gas holder, and the detection module is arranged outside the gas holder, so that the damage of special gas in the gas holder to the detection module is avoided, the risk of gas holder leakage caused by the requirements of wiring of the detection module and the like is avoided, and meanwhile, the communication between the detection module and the compression control module is facilitated.

And the compression control module is used for controlling the working state of each compressor according to the height of the gas holder detected by the detection module. Specifically, in the present embodiment, a plurality of threshold intervals and compression power values corresponding to the threshold intervals one by one are preset in the compression control module. The compression control module is used for acquiring a compression power value corresponding to a threshold interval where a detection value of the detection module is located as a power target value and controlling the working state of each compressor according to the power target value. Therefore, in the embodiment, the power target value corresponding to the detection value of the detection module can be directly obtained through the incidence relation between the threshold interval and the compression power, and the adaptation of the total power of the compressor module and the working condition is favorably ensured. Meanwhile, the compression power is set according to the threshold interval, so that the compressor modules all adopt the same total power when the internal gas containing capacity of the gas holder is within a certain range, the gas circuit safety is ensured, and the instability caused by frequent adjustment of the compressor power by the compressor modules is avoided.

In the present embodiment, each threshold interval is also associated with a corresponding power frequency number. The compression control module is used for acquiring the power frequency quantity corresponding to the threshold interval where the detection value of the detection module is located as a target quantity, the maximum value of the target quantity plus 1 is equal to the quantity of the compressors in the compressor module, the compression control module is used for controlling the compressors of which the quantity is the target quantity to execute a power frequency working state and controlling one compressor to execute a frequency conversion working state, and the working power of the compressor in the frequency conversion working state is equal to the sum of the power target value minus the working power of the compressors in all the power frequency working states.

That is, it is assumed that H compressors are commonly provided in the compressor module, and the H compressors are denoted by reference numerals 1, 2, 3, … …, i, … …, and H; when the detection value of the detection module is a, the power frequency quantity corresponding to the detection value a is b, and the compression power value corresponding to the detection value a is c. At this time, the target quantity is b, the power target value is c, the compression control module controls the compressor 1, the compressor 2 and the … … to execute a power frequency working state, and the compression control module controls the compressor b +1 to execute a variable frequency working state; the operating power of the compressor i is denoted P_iThen, thenWherein, P'_iRepresenting the power frequency of compressor i.

In the embodiment, through the matching of the compressor in the power frequency working state and the compressor in the variable frequency working state, the real-time control of each compressor is avoided, and the work load of the compression control module is reduced; and the compressor enters a power frequency working state, so that the working stability of the compressor is ensured, and the service life of the compressor is prolonged.

In specific implementation, the serial number of the compressor may be related to the power frequency power of the compressor, for example, the serial number of the compressor is positively related to the power frequency power of the compressor, that is, the smaller the serial number, the lower the power frequency power of the compressor before the serial number. Therefore, when the total power of the compressor module is adjusted, a wider power adjusting range can be realized by combining compressors with different power frequency powers; meanwhile, the compressor with smaller power frequency power is preferably selected to enter the working state, so that the total consumption of the compressor module is reduced.

In this embodiment, a balance valve is also connected between the input and output ports of each compressor. Therefore, when the air inflow of the compressor is smaller than the air outflow, the balance valve can be opened, and the balance of the air inflow and the air outflow of the compressor is ensured through the backflow of the compressed air output by the output port of the compressor, so that the normal work of the compressor is ensured.

In the embodiment, the balance valve adopts an electromagnetic valve and is connected with the compression control module; when the air input of any compressor is smaller than the air output under the condition that the power target value is the minimum compression power value, the compression control module controls the conduction of a balance valve corresponding to the compressor so as to ensure the balance of the air input and the air output of the compressor. Therefore, in the embodiment, the balance valve is intelligently controlled through the compression control module, and the automatic balance of the air inlet and the air outlet of each compressor is realized. In addition, in the embodiment, the compression control module ensures the balance of air inlet and air outlet of the compressor under the condition of maintaining the working power of the compressor unchanged through the balance valve, so that the power of the compressor module is adjusted according to the state of the gas cabinet, the state of the compressor module is prevented from reacting on the gas cabinet, the unidirectional correlation between the gas cabinet and the compressor is realized, the control accuracy of the whole system is improved, and the control difficulty and the error-prone degree are reduced.

In the present embodiment, a control method applied to the above gas compression storage system is also provided, which includes the following steps.

S1, setting a plurality of threshold intervals, wherein each threshold interval is associated with a corresponding power frequency quantity and a corresponding compression power value, and the compression power values and the threshold intervals are in one-to-one correspondence and positive correlation; the power frequency quantity and the threshold interval present a one-to-one or one-to-many relationship; the minimum value of the compression power values is a lower limit value, and the maximum value of the compression power values is an upper limit value.

And S2, acquiring a compression power value and a power frequency quantity corresponding to the threshold interval where the detection value of the detection module is located, wherein the compression power value and the power frequency quantity are respectively recorded as a target power value and a target quantity.

And S3, controlling the compressors of the corresponding number to execute the power frequency working state according to the target number, and calculating the difference value obtained by subtracting the working power of the compressors under all the power frequency working states from the target power value to be recorded as a residual target value.

In specific implementation, if the power frequency power of each compressor in the compressor module of the gas compression storage system is equal, the compressor can be arbitrarily selected to execute the power frequency working state in step S3.

If each compressor is provided with a priority weight, the priority weight of each compressor is in a positive relationship with the corresponding power frequency, and in step S3, each compressor is controlled to execute a power frequency working state according to the sequence of the priority weights from small to large until the number of the compressors in the power frequency working state reaches a target number. For example, in the above embodiment, the target number is b, the priority is represented by the compressor number, and the compression control module controls the compressors 1 to b to enter the power frequency operating state, and controls the compressor b +1 to enter the variable frequency operating state to execute the remaining target value.

And S4, controlling any compressor in the non-power frequency working state to enter a frequency conversion working state, executing the residual target value, and controlling the residual compressors to stop working.

The control method is further provided with the following steps after step S4.

And S5, detecting whether the compressor with the air inlet quantity smaller than the air outlet quantity exists or not.

S6, if not, the time delay returns to the step S2; if yes, judging whether the current executed target power value is the minimum compression power value.

S7, if not, the time delay returns to the step S2; if so, the balance valve connected in parallel with the compressor with the air inlet quantity smaller than the air outlet quantity is controlled to be conducted.

The gas compression storage system of the present invention is further explained below with reference to an embodiment for the specific gas methyl chloride.

In this embodiment, the gas supply module includes a water washing tower and a first acid washing tower; the air inlet pipeline comprises a fan and a second acid washing tower, and the air outlet pipeline comprises a first condenser, a second condenser and a finished product groove. So, the scrubbing tower, first pickling tower, the gas holder, the fan, the second pickling tower, the compressor module, first condenser, second condenser and finished product groove communicate in proper order and form the gas circuit, methyl chloride gets into the gas holder after the scrubbing tower washing with water and the first pickling tower of process, the fan is used for providing the power of sending into the gas in the gas holder to the second pickling tower, the compressor module is used for compressing the gas of second pickling tower output, the gas after the compression gets into the finished product groove storage after first condenser and the condensation of second condenser in proper order.

In this embodiment, the compressor module includes 3 compressors, and each compressor is connected in parallel with a balance valve.

The gas holder height changes along with the change of inside gas holding capacity, is equipped with height sensor on the gas holder, and compression control module connects height sensor, each balanced valve and each compressor respectively.

In this embodiment, when the gas storage capacity in the gas holder is low, that is, the target number corresponding to the detection value of the height sensor is 0, the compressor 1 enters the frequency conversion operating state, and the compressor 2 and the compressor 3 do not operate.

When the gas holding capacity in the gas holder is higher, namely the target quantity corresponding to the detection value of the height sensor is 1, the compressor 1 enters a power frequency working state, the compressor 2 enters a frequency conversion working state, and the compressor 3 does not work.

In this embodiment, the compressor 3 is a backup compressor, and the compressor 3 is in the operating state only when the gas capacity in the gas holder enters the high-pressure risk area. When the gas content in the gas holder enters a high-pressure risk area, the target quantity corresponding to the detection value of the height sensor is 2, at the moment, the compressor 1 and the compressor 2 enter a power frequency working state, and the compressor 3 enters a frequency conversion working state.

The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.