Biogas biological desulfurization multi-tower spray control device

Abstract

The utility model relates to the technical field of spray control circuits, and particularly discloses a multi-tower spray control device for biogas biological desulfurization. Comprising a power supply main loop of which the input end is electrically connected with an alternating current power supply, a plurality of spraying control branches electrically connected with the power supply main loop, a sewage pump control branch electrically connected with the power supply main loop, a valve power supply branch and a filtering control branch, the filtering control branch comprises a branch five-circuit breaker, a filtering control module and a filtering control module power supply which are electrically connected with the power supply main loop in sequence, and the filtering control module comprises a control module, a CPU (Central Processing Unit) module, a power module, a signal acquisition module and a communication module which are electrically connected with one another. A spraying system and other control systems are integrated in a desulfurization master control system, so that the problem of inconvenience in use exists.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of spray control circuits, and particularly discloses a multi-tower spray control device for biogas biological desulfurization. BACKGROUND

[0002] In a biological desulfurization system, bacteria strains in a biological desulfurization tower need to be supplemented with nutrient solution in a timed and quantitative manner. The quantity of biological desulfurization towers configured is different according to different front-end biogas production. In the original control system, one spray pump is configured for each desulfurization tower. If the system fails and stops, the desulfurization tower stops being used. The spray system is integrated with other control systems in the desulfurization total control system, which is not conducive to on-site installation, operation and maintenance, and is not conducive to reducing the total cost of the desulfurization system.

[0003] The control system has no expansion capability and is only suitable for use in four or fewer desulfurization towers.

[0004] Therefore, the inventor provides a multi-tower spray control device for biogas biological desulfurization to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at solving the problem that in the traditional biological desulfurization system, the spray system is integrated with other control systems in the desulfurization total control system.

[0006] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides a multi-tower spray control device for biogas biological desulfurization, which comprises a power supply main circuit electrically connected with an input end and an alternating current power supply, a plurality of spray control branches electrically connected with the power supply main circuit, a blowdown pump control branch electrically connected with the power supply main circuit, a valve power supply branch and a filter control branch, the filter control branch comprises a branch five circuit breaker, a filter control module and a filter control module power supply which are electrically connected with the power supply main circuit in sequence, and the filter control module comprises a control module, a CPU module, a power module, a signal acquisition module and a communication module which are electrically connected with each other.

[0007] Further, the power supply main circuit is provided with a main circuit breaker, the spray control branch comprises a branch one circuit breaker and a branch two circuit breaker which are connected in parallel at the output end of the main circuit breaker, a spray pump one and a spray pump two which are connected in series at the output end of the branch one circuit breaker and the branch two circuit breaker respectively, and a control circuit one and a control circuit two for controlling the branch one circuit breaker and the branch two circuit breaker respectively.

[0008] Further, the main circuit breaker is a relay with the functions of conducting power supply, line short circuit and thermal magnetic protection.

[0009] Further, the main circuit breaker, the branch circuit one breaker and the branch circuit two breaker are all relays with thermal relay protection function.

[0010] Further, the control circuit one and the control circuit two both include a relay group, a breaker, an AC contactor and a soft starter arranged in the power module.

[0011] Further, the power output end of the control module is connected in parallel with the power input end of the CPU module, the power input end of the signal acquisition module and the input end of the communication module.

[0012] Further, the power module is an NPN power amplifier.

[0013] Further, the display control screen connected in parallel with the power output end of the control module is further included.

[0014] Further, the signal acquisition module includes a pressure transmitter, a temperature transmitter and a gas flow meter.

[0015] The principle and effect of the scheme are that:

[0016] 1. Compared with the prior art, the utility model integrates the control circuit, realizes the start and stop of the spray pump through the spray control circuit, reduces the installation space of the field electrical control system, saves space, reduces the construction difficulty, is portable, is plug and play, realizes the field rescue and maintenance of the system, reduces the cost, and solves the problem that the spray system and other control systems are integrated in the desulfurization general control system in the traditional biological desulfurization system, which is not conducive to use.

[0017] 2. Compared with the prior art, the utility model can control the direct current or alternating current load at will, the public point structure is compact, wiring is facilitated, space is saved, the arbitrary switching of four desulfurization towers and above can be realized, and the utility model is convenient to disassemble and install on the field of a project. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0019] Figure 1 A main circuit electrical schematic diagram of a biogas biological desulfurization multi-tower spray control device is shown;

[0020] Figure 2 A schematic diagram of a control module of a biogas biological desulfurization multi-tower spray control device is shown;

[0021] Figure 3 A control circuit electrical schematic diagram of a biogas biological desulfurization multi-tower spray control device is shown.

[0022] Figure 4 A schematic diagram of a signal acquisition module of a biogas biological desulfurization multi-tower spray control device is shown.

[0023] Figure 5 A schematic diagram of the electrical device arrangement of a biogas biological desulfurization multi-tower spray control device is shown. DETAILED DESCRIPTION

[0024] To further illustrate the technical means and effects taken by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0025] A biogas biological desulfurization multi-tower spray control device, the embodiment is as shown in Figure 1

[0026] It comprises a power supply main circuit, two spray control branches, a blowdown pump control branch, a valve power supply branch and a filter control branch.

[0027] The power supply main circuit comprises a main circuit breaker QF1, and is connected with a branch one breaker QF2, a branch two breaker QF3, a branch three breaker QF4, a branch four breaker QF4 and a branch five breaker QF5. Among them, the input end of the main circuit breaker QF1 is connected with an alternating current power supply, and the power output end of the main circuit breaker QF1 is electrically connected with the power input ends of the branch one breaker QF2, the branch two breaker QF3, the branch three breaker QF4, the branch four breaker QF4 and the branch five breaker QF5.

[0028] The two spray control branches are connected with two spray pumps, which are spray pump A and spray pump B. The spray pump A is connected to the branch one, and the branch one comprises the branch one breaker QF2, an alternating current contactor KM2, a soft starter one and the spray pump A. The spray pump B is connected to the branch two, and the branch two comprises the branch two breaker QF3, an alternating current contactor KM3, a soft starter two and the spray pump B. The power output end of the branch one breaker QF2 is connected with the soft starter one in series, and the soft starter one is connected with the contactor KM2 in parallel. The power output end of the branch two breaker QF3 is connected with the soft starter two in series, and the soft starter two is connected with the contactor KM3 in parallel.

[0029] ​The sewage pump control branch is branch three, the power output end of branch three circuit breaker QF4 is connected with contactor KM4; the valve power supply branch is branch four, the power output end of branch four circuit breaker QF5 is connected with the power supply of each pneumatic switch valve; the filter control branch is branch five, branch five circuit breaker QF6 is connected with the filter control module and the filter control module power supply of AC to DC. The filter control module includes a control module, a CPU module, a power module, a signal acquisition module and a communication module connected with each other. Moreover, the main circuit breaker QF1 is a circuit breaker with conduction power supply, line short circuit and thermal magnetic protection functions. The main circuit breaker QF1, the branch one circuit breaker QF2, the branch two circuit breaker QF3 and the branch three circuit breaker QF4 are circuit breakers with thermal relay protection functions.

[0030] In the embodiment, the control circuit includes control circuit one, control circuit two and control circuit three, which are respectively used for controlling the branch one circuit breaker, the branch two circuit breaker and the branch three circuit breaker. The control circuit one and the control circuit two include a relay group of the power module, a circuit breaker, an AC contactor, a soft starter, the control circuit three includes a relay group of the power module and an AC contactor. The signal acquisition module includes a pressure transmitter, a temperature transmitter and a gas flow meter, wherein the gas flow meter is specifically a float flow meter. The power module is an NPN power amplifier.

[0031] As shown in Figure 3 , in the secondary port of the soft starter in the control circuit one and the control circuit two, the RUN terminal is connected with the normally open contact of the intermediate relay KA1, the start completion signal is connected with the normally open contact of K22, and the fault signal is connected with the normally closed contact of K24. The soft starter start command is connected with the upper end of the power supply L11 on the normally open contact of the intermediate relay K22, the lower end is connected with the upper end of the soft starter fault intermediate relay K23, and the lower end of the intermediate relay K23 is connected with the coil upper end of the bypass contactor KM2 of the soft starter. Moreover, the line segment of the coil of the soft starter bypass relay KM2 is connected with the common zero line.

[0032] The power output end of the control module is connected with the power input end of the CPU module, the electric input end of the display control screen, the power input end of the communication module and the power input end of the signal acquisition module.

[0033] Moreover, as shown in Figure 1The normally open contact of the AC contactor KM1, the normally open contact of the AC contactor KM2, the normally open contact of the AC contactor KM3, the normally open contact of the branch one circuit breaker QF2, the normally open contact of the branch two circuit breaker QF3, the normally open contact of the branch three circuit breaker QF4, the normally closed contact of the float flowmeter limit switch, the normally open contact and the normally closed contact of the program-controlled valve, and the normally closed contact of the liquid level switch are connected with the DI input port of the CPU module. The DI input port 1M of the CPU module is connected with the power supply L+ of the control module, and the DO output port of the CPU module is connected with the input port X of the NPN power amplifier in sequence according to the digital serial number. The DC input of the NPN power amplifier is connected with the power supply L+ of the control module, and the output ends L1, L2 and L3 of the NPN power amplifier are connected with the intermediate relay KA1, KA2 and the coil A1 of the AC contactor KM4. The output ends L4, L5, L6, L7 and L8 of the NPN power amplifier are connected with the input ends of the electric valve.

[0034] The input end of the signal acquisition module is connected with the output end of the power supply of the control module. The communication cables of the pressure transmitter, the temperature transmitter and the float flowmeter are connected with the communication ports of RS480 01, RS480 02 and RS480 03 respectively, the network ports of the communication module are connected with the Ethernet communication interfaces of the CPU module, the communication interface of the display control screen, the Ethernet communication interface of the signal module and the communication interface of the upper computer in parallel.

[0035] The start-stop control mode of the branch one and the branch two is consistent, which is different from the prior art. The utility model increases the intermittent start-stop of the circulating spray pump, and the original one-tower one-pump spray control mode is changed into a two-tower one-pump spray mode through the program control of the CPU module. Specifically, the A / B double-tower spray automatic button on the display control screen is clicked, the voltage signal enters the input end of the NPN power amplifier after the CPU module output signal Q0.3 is turned on, the signal is filtered through the NPN power amplifier, and then the signal is amplified to drive the solid-state relay L4 of the NPN power amplifier. The output AC 220V power supply of L4 is input into the water pipeline pneumatic valve of tower A, and the pneumatic valve A is started. When the CPU module input end detects that the tower A valve is opened to the position, the voltage signal enters the input end of the NPN power amplifier through the CPU module program instruction output signal Q0.0, the signal is filtered through the NPN power amplifier, and then the signal is amplified to drive the solid-state relay L1 of the NPN power amplifier. L1 is connected with the start relay KA1 coil of the soft starter, and the KA1 coil enters the AC 220V voltage. After the coil is actuated, the normally open contact of KA1 becomes a normally closed contact, the soft starter is driven to start, the circulating spray pump A is started, and after the circulating spray pump A is started, the soft starter is delayed for 10 seconds. The normally open contact of the soft starter is changed into a normally closed contact, the coil of the bypass contact KM2 of the soft starter is electrified, the circulating spray pump A is changed into a power frequency operation, and the tower A spray timer of the CPU module is counted down at the same time.

[0036] When the circulating spray pump A operates for N1 minutes, the CPU module output signal Q0.0 stops conduction, the circulating spray pump A stops, the CPU module output signal Q0.3 stops conduction, and the A tower of the CPU module stops the spray timer countdown. When N2 minutes are reached, the CPU module output signal Q0.4 is turned on, the corresponding NPN power amplifier solid-state relay L5 inputs the power supply to the water pipe pneumatic valve of the B tower, the pneumatic valve B is started, and when the CPU module input end detects that the B tower valve is opened to the position, the circulating spray pump A is started through the CPU module program instruction output signal Q0.0. The intermittent start and stop of the spray pump are realized, the nutrient solution is sprayed on the A / B desulfurization tower according to time, and the bacteria in the tower fully absorb the nutrient solution.

[0037] During the spraying process, if the CPU module input end does not detect the float flowmeter signal, it indicates that the system circulating liquid is too little. In order to protect the water pump from being burned out, the CPU module delays for M seconds and then stops the water pump operation. The display control screen system alarm prompts.

[0038] When the CPU module input end detects the spray tower A liquid level switch signal conduction, the CPU module output end Q0.2 is turned on through the CPU module logic program, the NPN power amplifier solid-state relay L3 is driven, the L3 is connected with the blowdown pump AC contactor coil KM3, the coil KM3 is electrified, and the blowdown pump is started. The blowdown pump operation timer counts down, and when M1 minutes are reached, the CPU module output end Q0.2 is stopped, the coil KM3 is de-energized, and the blowdown pump is stopped.

[0039] As shown in Figure 4 and Figure 5 , the pressure transmitter, the temperature transmitter, and the float flowmeter are transmitted into the signal acquisition module RS485 01-03 in the form of RS485 communication signals. The RS485 communication signal message format complies with the Modbus-Rtu standard protocol, and can collect instantaneous pressure, instantaneous temperature, instantaneous flow, and cumulative flow signals. The signals are transmitted into the communication module in the form of RJ45 communication signals in the signal acquisition board through data transparent transmission. The RJ45 signal transmission no longer analyzes the message, but only needs to transform the data type, which can be directly read by the CPU module. The CPU module transmits to the display control screen, the control computer in the control room, or the CPU module of the desulfurization total control system in the form of TCP / IP transmission.

[0040] The display control screen selects McgsTpc-TPC1061Ki, the CPU control module selects S7-200SMAERT 6ES7288-1ST40-0AA0, the switch uses 5-port gigabit MOXA, and the field devices are installed in the 304 stainless steel explosion-proof control box.

[0041] The utility model discloses can realize the spray of multiple biological desulfurization towers, satisfy the large amount of biogas desulfurization, realize the intermittent equipment start-stop, guarantee the stability of desulfurization process system operation, simultaneously, reduce the installation space of on -the -spot electrical control system, meet national explosion -proof grade, be applicable to the installation in the explosion -proof area, and save space, reduce construction difficulty, portable, plug and play, realize the on -the -spot rescue and maintenance of system, reduced cost.

[0042] The utility model discloses can control direct current or alternating current load at will, and the public point structure is compact, and convenient wiring, save space, appearance neat and fashionable, save material and labor, safe and reliable, is the connection bridge of control module output, commonly used to drive electromagnetic valve, contactor, small motor, hydraulic valve etc., and can realize 4 desulfurization towers and above arbitrary switching, and convenient dismounting and installation in the field of project.

[0043] And, the NPN power amplifier used in the utility model does not need to increase additional electrical components, can directly drive high-power equipment, valves, coils, and all instruments enter the signal acquisition module through the modbus-RTU communication mode, the signal acquisition module can only collect the instantaneous and cumulative data of multiple instruments through one network cable; reduce the amount of cable use. And meet the adjustment of desulfurization process, the touch screen control can increase or reduce the number of desulfurization towers at any time.

[0044] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, although the utility model has disclosed the above with the preferred embodiment, however, it is not used to limit the utility model, any person skilled in the art, without departing from the technical scheme range of the utility model, can make some changes or modifications to the equivalent embodiment of equivalent change by using the disclosed technical content, but as long as it does not depart from the technical scheme content of the utility model, according to the technical essence of the utility model, any modification, equivalent change and modification of the above embodiment, all still belong to the range of the technical scheme of the utility model.

Claims

1. A multi-column spray control device for biogas biological desulfurization, characterized by, The power supply main circuit includes an input end and an alternating current power supply, a plurality of spray control branches, a blowdown pump control branch, a valve power supply branch and a filter control branch, the filter control branch includes a branch five circuit breaker, a filter control module and a filter control module power supply connected with the power supply main circuit in sequence, and the filter control module includes a control module, a CPU module, a power module, a signal acquisition module and a communication module connected with each other.

2. The multi-column spray control device for biodesulfurization of biogas according to claim 1, characterized in that, The power supply main circuit is provided with a main circuit circuit breaker, the spray control branch includes a branch one circuit breaker and a branch two circuit breaker connected in parallel at the output end of the main circuit circuit breaker, a spray pump one and a spray pump two connected in series at the output end of the branch one circuit breaker and the branch two circuit breaker respectively, and a control circuit one and a control circuit two for controlling the branch one circuit breaker and the branch two circuit breaker respectively.

3. The multi-column spray control device for biodesulfurization of biogas according to claim 2, characterized in that, The main circuit circuit breaker is a relay with the functions of conducting power supply, line short circuit and thermal magnetic protection.

4. The multi-column spray control device for biodesulfurization of biogas according to claim 3, characterized in that, The main circuit circuit breaker, the branch one circuit breaker and the branch two circuit breaker are all relays with the function of thermal relay protection.

5. The multi-column spray control device for biodesulfurization of biogas according to claim 2, characterized in that, The control circuit one and the control circuit two both include a relay group, a circuit breaker, an alternating current contactor and a soft starter arranged in the power module.

6. The multi-column spray control device for biodesulfurization of biogas according to claim 5, characterized in that, The power output end of the control module is connected in parallel with the power input end of the CPU module, the power input end of the signal acquisition module and the input end of the communication module.

7. The multi-column spray control device for biodesulfurization of biogas according to claim 1, characterized in that, The power module is an NPN power amplifier.

8. The multi-column spray control device for biodesulfurization of biogas according to claim 1, characterized in that, The display control screen connected in parallel with the power output end of the control module is further included.

9. The multi-column spray control device for biodesulfurization of biogas according to claim 1, characterized in that, The signal acquisition module includes a pressure transmitter, a temperature transmitter and a gas flowmeter.

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