A kind of emergency adjustable anti-ammonia inhibition anaerobic system and emergency adjustment method

Abstract

The invention discloses an emergency-adjustable anti-ammonia inhibition anaerobic system and an emergency adjustment method, comprising: the inlet end of the hydrolysis acidification reactor is connected to the organic slurry conveying pipeline, and the outlet end thereof is connected to the anaerobic digestion reactor; the anaerobic digestion reactor is connected to the agent dosing device through the agent conveying pipeline with an electromagnetic opening and closing valve, and an online ammonia concentration detector and an online pressure detector are installed on the anaerobic digestion reactor; the outlet end of the flushing water collection tank is connected to the flushing water pipeline, the flushing water pipeline is connected to the organic slurry conveying pipeline, and the data output ends of the online ammonia concentration detector and the online pressure detector are connected to the controller; the controller controls the opening and closing of the agent conveying pipeline according to the data processing result. The invention not only adopts multiple anti-ammonia inhibition measures, thereby preventing the inhibition of methanogens by free ammonia in the anaerobic digestion reactor, but also avoids the influence of abnormal conditions on the operation of the system through an emergency adjustment mechanism, thereby significantly improving the economic benefits of the food waste treatment plant.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen waste treatment, and in particular to an emergency-adjustable ammonia-inhibiting anaerobic system and an emergency-adjusting method for kitchen waste treatment. Background Art

[0002] The core of food waste treatment - anaerobic reaction, is to convert organic matter in food waste into methane (the main component of biogas) and carbon dioxide through anaerobic microbial degradation. The anaerobic reaction process is carried out in a sealed space container. The anaerobic reaction is divided into two major stages: the first stage is the hydrolysis and acidification stage, in which fermentative bacteria first decompose high-molecular organic matter into small-molecule soluble organic matter, and then hydrolyze it into monomers under the action of hydrolases secreted by microorganisms, and then hydrogen-producing acid-producing bacteria convert the above products into organic volatile fatty acids such as acetic acid, propionic acid and butyric acid, while producing carbon dioxide and hydrogen. The second stage is the methanogenic stage, that is, under the action of methanogens, carbon dioxide and methane are generated by converting acetic acid, or methane is produced by reducing carbon dioxide with hydrogen.

[0003] Most of the nitrogen-containing substances in the anaerobic digestion substrate, such as urea and protein, undergo redox denitrification reactions to generate ammonia, which is converted into NH 4 + and NH 3 (Free ammonia) exists in two forms, NH 4 + -N is an essential nutrient element for the growth of anaerobic microorganisms. For the normal growth of microorganisms, NH 4 + -N concentration is above 40-70mg / L. 4 + -N concentration will far exceed this limit, while high concentration of NH 4 + -N will inhibit methanogens, because methanogens have the worst tolerance to ammonia and are most likely to stop growing when inhibited by ammonia, while the activity of hydrogen-producing and acid-producing bacteria in the hydrolysis and acidification stage remains basically unchanged. If the activity of methanogens in the methanogenesis stage is inhibited, the anaerobic degradation efficiency and biogas production efficiency in the methanogenesis stage will be greatly reduced, and even biogas production will stop and the anaerobic system will fail to operate. At the same time, the existing anaerobic treatment system does not have an emergency adjustment function. If ammonia is inhibited at the beginning of the abnormality, the influence of ammonia inhibition in the hydrolysis and acidification stage can be effectively avoided, and the anaerobic treatment system can be ensured to operate stably for a long time. Summary of the invention

[0004] The object of the present invention is to provide an emergency-adjustable ammonia-inhibition-proof anaerobic system and an emergency adjustment method for treating kitchen waste in view of the above-mentioned problems. The present invention not only adopts multiple ammonia-inhibition-proof measures to prevent the inhibition of methanogens by free ammonia in the anaerobic digestion reactor to a large extent, but also avoids the influence of abnormal conditions on the operation of the system through the emergency adjustment mechanism, thereby overcoming the shortcomings of the existing anaerobic system and significantly improving the economic benefits of the kitchen waste treatment plant.

[0005] The technical solution adopted by the present invention is as follows: an emergency adjustable anti-ammonia inhibition anaerobic system, which is used for the treatment of restaurant kitchen waste, and comprises:

[0006] A hydrolysis and acidification reactor is used for hydrolysis and acidification of organic slurry. The hydrolysis and acidification reactor is a closed container, the inlet of which is connected to the first organic slurry delivery pipeline, and the outlet of which is connected to the inlet of the anaerobic digestion reactor through the second organic slurry delivery pipeline;

[0007] The anaerobic digestion reactor is used to process the feed liquid from the hydrolysis acidification reactor. The anaerobic digestion reactor is a closed container, and its outlet end is connected to the feed liquid discharge pipeline. The anaerobic digestion reactor is provided with a reagent interface, and the reagent interface is connected to the reagent dosing device through the reagent delivery pipeline. The reagent delivery pipeline is provided with an electromagnetic opening and closing valve, and the electromagnetic opening and closing valve is controlled by a controller; an online ammonia concentration detector and an online pressure detector are installed on the top cover of the anaerobic digestion reactor to respectively detect the ammonia concentration and pressure in the anaerobic digestion reactor;

[0008] A flushing water collection tank is used to collect flushing water. The outlet end of the flushing water collection tank is connected to a flushing water pipeline. The flushing water pipeline is connected to an organic slurry delivery pipeline to return the flushing water to the hydrolysis acidification reactor. A delivery pump, a regulating valve and a flow meter are provided on the flushing water pipeline.

[0009] An online ammonia concentration detector and an online pressure detector, wherein the probe of the online ammonia concentration detector extends into the organic slurry in the anaerobic digestion reactor to detect the free ammonia concentration in the organic slurry in real time, and the data output end of the online ammonia concentration detector is connected to the controller; the probe of the online pressure detector extends into the top of the anaerobic digestion reactor to detect the pressure in the anaerobic digestion reactor in real time, and the data output end of the online pressure detector is connected to the controller;

[0010] The controller is used to process the data from the online ammonia concentration detector and the online pressure detector, and control the opening and closing of the reagent delivery pipeline according to the data processing results.

[0011] Furthermore, the controller is respectively connected to a first comparator, a second comparator, and a memory, and the controller includes a central processing unit, and the central processing unit controls the first comparator, the second comparator, and the electromagnetic on-off valve through a first comparator control module, a second comparator control module, and an electromagnetic valve control module, respectively. The first comparator and the second comparator are used to compare the data transmitted by the online ammonia concentration detector and the online pressure detector with a first preset threshold value and a second preset threshold value, respectively. When the data transmitted by the online ammonia concentration detector is not less than the first preset threshold value, and the data transmitted by the online pressure detector is less than the second preset threshold value, the central processing unit opens the electromagnetic on-off valve through the electromagnetic on-off valve control module to allow the agent to enter the anaerobic digestion reactor through the agent delivery pipeline; the memory is used to store the set threshold data and the data transmitted from the online ammonia concentration detector and the online pressure detector.

[0012] Furthermore, the controller is also connected to an alarm, and the central processing unit controls the alarm through the alarm module. When the data transmitted by the online ammonia concentration detector is not less than the first preset threshold, and the data transmitted by the online pressure detector is not less than the second preset threshold, the central processing unit controls the alarm through the alarm module, and the alarm sounds an alarm.

[0013] Furthermore, the controller is also connected to a third comparator, and the central processing unit controls the third comparator through a third comparator control module. The third comparator is used to compare the data transmitted by the online ammonia concentration detector with a third preset threshold value, and the third preset threshold value is smaller than the first preset threshold value. When the data transmitted by the online ammonia concentration detector is not greater than the third preset threshold value, the central processing unit closes the electromagnetic opening and closing valve through the electromagnetic opening and closing valve control module to close the drug delivery pipeline.

[0014] Furthermore, a dosing metering pump is provided on the drug delivery pipeline, the controller is connected to the dosing metering pump, and the central processing unit also includes a dosing metering pump control module. The central processing unit controls the dosing metering pump through the dosing metering pump control module. When the central processing unit sends an electromagnetic opening and closing valve control signal, the dosing metering pump control module is simultaneously triggered to send a control signal to the dosing metering pump, so as to control the electromagnetic opening and closing valve and the dosing metering pump at the same time.

[0015] Furthermore, the controller is a CMSA51 single chip microcomputer or a PLC controller.

[0016] Furthermore, the first preset threshold is 4000 mg / L, and the third preset threshold is 1500 mg / L.

[0017] Furthermore, the online ammonia concentration detector is Amtax-NA8000 ，The online pressure detector is PMC131-A12F1A1S.

[0018] Furthermore, the volume of the anaerobic digestion reactor is 5-7 times the volume of the hydrolysis acidification reactor.

[0019] Furthermore, the present invention also includes an emergency adjustment method for an anti-ammonia inhibition anaerobic system, comprising the following steps:

[0020] A. Emergency adjustment of the anti-ammonia inhibition anaerobic system. Under normal operation, the electromagnetic on-off valve and the dosing metering pump are in a closed state, the online ammonia concentration detector and the online pressure detector detect the ammonia concentration and pressure in the anaerobic digestion reactor respectively, and transmit the detected data to the controller, and set the first preset threshold value in the first comparator to 4000 mg / L, and the third preset threshold value in the third comparator to 1500 mg / L;

[0021] B. The first comparator and the third comparator compare the data transmitted by the online ammonia concentration detector with the first preset threshold and the third preset threshold respectively, and the second comparator compares the data transmitted by the online pressure detector with the second preset threshold, and transmits the comparison result to the central processor, which judges the comparison result;

[0022] C. When the data transmitted by the online ammonia concentration detector is not less than the first preset threshold value, and the data transmitted by the online pressure detector is less than the second preset threshold value, the central processing unit opens the electromagnetic opening and closing valve and the dosing metering pump through the electromagnetic opening and closing valve control module and the dosing metering pump control module respectively, so that the agent enters the anaerobic digestion reactor through the agent delivery pipeline;

[0023] D. When the data transmitted by the online ammonia concentration detector is not less than the first preset threshold value, and the data transmitted by the online pressure detector is not less than the second preset threshold value, the central processor sends an execution signal to the alarm through the alarm module, and the alarm sounds an alarm;

[0024] E. When the data transmitted by the online ammonia concentration detector is less than the first preset value and greater than the third preset threshold, the central processing unit does not send any execution signal;

[0025] F. When the data transmitted by the online ammonia concentration detector is not greater than the third preset threshold value, the central processing unit closes the electromagnetic opening and closing valve and the dosing metering pump through the electromagnetic opening and closing valve control module and the dosing metering pump control module respectively, so that the agent is closed through the agent delivery pipeline.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. The present invention uses two different reactors, hydrolysis acidification and anaerobic digestion, connected in series. In the hydrolysis acidification reactor, hydrogen-producing acid-producing bacteria play a biodegradation role; in the anaerobic digestion reactor, methanogens play a biodegradation role, so that hydrogen-producing acid-producing bacteria and methanogens grow under their respective optimal environmental conditions and exert their respective optimal metabolic capabilities, making full use of their biodegradation activities, and avoiding the generation of excessive free ammonia in the anaerobic digestion reactor to inhibit the activity of methanogens;

[0028] 2. In the anaerobic system of the present invention, the ammonia concentration of the organic slurry in the anaerobic digestion reactor is constantly changing, and the range of change is large, so it is difficult to accurately control the ammonia concentration of the organic slurry. According to the production practice summary, when the ammonia concentration of the organic slurry in the anaerobic digestion reactor exceeds 4000 mg / L, a serious ammonia inhibition problem will occur, which will greatly affect the stability of the system operation and the anaerobic decomposition treatment efficiency. For this reason, the first preset threshold is set to 4000 mg / L as a prerequisite for adding the agent; further, the ammonia concentration is inversely related to the air pressure in the tank body. As the ammonia concentration increases, the air pressure in the tank body tends to decrease. Therefore, when the pressure drop is detected by the online pressure detector, it not only indicates that the ammonia concentration has affected the production of biogas, but also significantly inhibits the anaerobic decomposition treatment efficiency. This condition is used as a criterion for whether to add the agent. If the air pressure is not significantly reduced, it means that the tank body is not sealed enough. At this time, the effect of adding the agent is not obvious, and the tank body needs to be repaired to solve the problem. Therefore, an alarm is issued through the alarm module to remind the operator that the tank body is not sealed enough;

[0029] 3. After adding the reagent, the ammonia concentration can be reduced to below the first preset value in a short time. If it is determined that the reagent does not need to be added at this time, it has been proved through practice that the ammonia concentration will repeatedly reach above the first preset value, resulting in the frequent opening of the reagent delivery pipeline, which greatly reduces the life of the electromagnetic on-off valve and the adjustment effect of the reagent is not good. It is concluded through multiple tests that after adding the reagent, when the ammonia concentration reaches no more than 1500mg / L, the subsequent change in ammonia concentration will not exceed 4000mg / L. Therefore, 1500mg / L is used as the third preset threshold value, which is used as the basis for closing the electromagnetic on-off valve, thereby avoiding the problem of frequent opening of the electromagnetic on-off valve;

[0030] 4. The flushing water collection and reflux unit returns the equipment flushing water to the hydrolysis and acidification reactor. On the one hand, it can dilute the free ammonia in the food waste slurry, and on the other hand, it can buffer the ammonia produced by the degradation of protein in the food waste under anaerobic conditions, which plays a buffering role in the pH reduction of the hydrolysis and acidification unit. It not only avoids the problem of increased ammonia concentration in the subsequent anaerobic digester (maintaining the ammonia concentration below 4000 mg / L) and acidification that inhibits the activity of methanogenic bacteria, but also reduces the consumption of water for dilution of pulping in the pretreatment unit and saves the treatment cost of flushing wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the flow structure of an emergency adjustable ammonia inhibition anaerobic system for kitchen waste treatment according to the present invention;

[0032] Figure 2 It is a schematic diagram of the control flow of the emergency adjustable anti-ammonia inhibition anaerobic system of the present invention.

[0033] Markings in the figure: 1 is a hydrolysis acidification reactor, 2 is an anaerobic digestion reactor, 3 is a reagent dosing device, 4 is a flushing water collection tank, 5 is a regulating valve, 6 is a delivery pump, 7 is a flow meter, 8 is a flushing water pipeline, 9 is a concrete support, 10 is a first organic slurry delivery pipeline, 11 is a dosing metering pump, 12 is a reagent delivery pipeline, 13 is a second organic slurry delivery pipeline, 14 is a liquid discharge pipeline, 15 is an online pressure detector, 16 is an online ammonia concentration detector, 17 is an electromagnetic opening and closing valve, 18 is a controller, A1 is a first comparator, A2 is a second comparator, A3 is a memory, A4 is a central processing unit, A5 is an alarm, A6 is a third comparator, A-1 is a first comparator control module, A-2 is a second comparator control module, A-3 is an electromagnetic opening and closing valve control module, A-4 is a dosing metering pump control module, A-5 is an alarm control module, and A-6 is a third comparator control module. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] like Figure 1 and Figure 2 As shown, an emergency adjustable anti-ammonia inhibition anaerobic system for kitchen waste treatment comprises:

[0037] The hydrolysis and acidification reactor 1 is used for hydrolysis and acidification of organic slurry. The organic slurry is organic slurry produced after pretreatment of kitchen waste. The inlet end of the hydrolysis and acidification reactor 1 is connected to the first organic slurry delivery pipeline 10, and the outlet end thereof is connected to the inlet end of the anaerobic digestion reactor 2 through the second organic slurry delivery pipeline 13. The hydrolysis and acidification reactor is generally a cylindrical closed tank, and a stirrer (not shown) is installed in the tank to stir the organic slurry. The hydrolysis and acidification reactor 1 contains hydrogen-producing and acid-producing bacteria to hydrolyze and acidify the organic slurry.

[0038] The anaerobic digestion reactor 2 is used to treat the feed liquid from the hydrolysis acidification reactor 1. The outlet end of the anaerobic digestion reactor 2 is connected to the feed liquid discharge pipeline 14. The anaerobic digestion reactor 2 is provided with a reagent interface (not shown), and the reagent interface is connected to the reagent dosing device 3 through the reagent pipeline 12. The reagent dosing device 3 is provided with a stirrer (not shown) for stirring the reagent. The reagent delivery pipeline 12 is provided with an electromagnetic opening and closing valve 17, and the electromagnetic opening and closing valve 17 is controlled by a controller 18. The reagent in the reagent dosing device 3 is an ammonia inhibition antagonist such as sodium salt and magnesium salt; accordingly, the anaerobic digestion reactor 2 is a cylindrical closed tank, and a stirrer (not shown) is installed in the tank. The anaerobic digestion reactor 2 contains methanogens to perform anaerobic digestion treatment on the feed liquid. An online ammonia concentration detector 16 and an online pressure detector 15 are installed on the top cover of the anaerobic digestion reactor 2 to respectively detect the ammonia concentration and pressure in the anaerobic digestion reactor 2;

[0039] The flushing water collection tank 4 is used to collect flushing water. The flushing water generally comes from equipment flushing water and ground flushing water. The outlet end of the flushing water collection tank 4 is connected to a flushing water pipeline 8. The flushing water pipeline 8 is connected to a first organic slurry delivery pipeline 10. The flushing water pipeline 8 is provided with a delivery pump 6, a regulating valve 5 and a flow meter 7 to control and adjust the delivery flow of the flushing water.

[0040] An online ammonia concentration detector 16 and an online pressure detector 15, wherein the probe of the online ammonia concentration detector 16 extends into the organic slurry in the anaerobic digestion reactor 2 to detect the free ammonia concentration in the organic slurry in real time, and the data output end of the online ammonia concentration detector 16 is connected to the controller 18, and the online ammonia concentration detector is preferably Amtax-NA8000; the probe of the online pressure detector 15 extends into the top of the anaerobic digestion reactor 2 to detect the pressure in the anaerobic digestion reactor 2 in real time, and the data output end of the online pressure detector 15 is connected to the controller 18, and the online pressure detector is preferably PMC131-A12F1A1S;

[0041] The controller 18 is used to process the data from the online ammonia concentration detector 16 and the online pressure detector 15, and control the opening and closing of the reagent delivery pipeline 12 according to the data processing results.

[0042] In the anaerobic system of the present invention, in order to accurately measure the added agent, a dosing metering pump 11 is provided on the agent pipeline 12, and the dosing metering pump 11 is used to control the amount of the added agent.

[0043] As an implementation method, in order to better collect flushing water, the top height of the flushing water collection tank 4 is slightly lower than the ground, so that the equipment flushing water and the ground flushing water flow into the flushing water collection tank 4 by gravity. Accordingly, in order to save energy consumption for material transportation, the hydrolysis acidification reactor 1 is installed on the concrete support 9, and the top height of the hydrolysis acidification reactor 1 is higher than the top height of the anaerobic digestion reactor 2.

[0044] As an implementation mode, since the residence time of the hydrolysis acidification reaction is generally 5 days, and the residence time of the anaerobic digestion reaction is 25 days, in order to improve the continuity of the system treatment, the volume of the anaerobic digestion reactor 2 is 5-7 times the volume of the hydrolysis acidification reactor 1, preferably 5 times.

[0045] Furthermore, during normal operation, the anaerobic system of the present invention, in addition to having an emergency adjustment function, places hydrogen-producing acid-producing bacteria and methanogens in a hydrolysis acidification reactor and an anaerobic digestion reactor respectively, and continuously treats organic slurry in a series manner, so that hydrogen-producing acid-producing bacteria and methanogens grow under their respective optimal environmental conditions and exert their respective optimal metabolic capabilities, avoiding the generation of excessive free ammonia in the anaerobic digestion reactor to inhibit the activity of methanogens. At the same time, the present invention also provides a flushing water collection and reflux unit, through which the flushing water of the equipment is refluxed to the hydrolysis acidification reactor 1, which can, on the one hand, remove the free ammonia in the organic slurry, and on the other hand, buffer the ammonia produced by the degradation of protein in the organic slurry under anaerobic conditions, play a buffering role in the pH reduction of the hydrolysis acidification unit, reduce the consumption of water for pulping dilution in the pretreatment unit, and save the treatment cost of flushing wastewater.

[0046] As an implementation mode, in order to better realize the emergency adjustment function of the present invention, the controller 18 is respectively connected with a first comparator A1, a second comparator A2, and a memory A3 (using a conventional connection method), the controller 18 is a conventional CMSA51 single-chip microcomputer or a PLC controller, the first comparator A1, the second comparator A2, and the memory A3 are conventional comparators and memories, the controller 18 includes a central processing unit A4, and the central processing unit A4 controls the first comparator A1, the second comparator A2, and the electromagnetic valve control module A-3 (conventional modular design) respectively. The closing valve 17 is controlled, and the first comparator A1 and the second comparator A2 are used to compare the data transmitted by the online ammonia concentration detector 16 and the online pressure detector 15 with the first preset threshold and the second preset threshold respectively. When the data transmitted by the online ammonia concentration detector 16 is not less than the first preset threshold, and the data transmitted by the online pressure detector 15 is less than the second preset threshold, the central processor A4 opens the electromagnetic opening and closing valve through the electromagnetic opening and closing valve control module A-3 to allow the agent to enter the anaerobic digestion reactor 2 through the agent delivery pipeline 12; the memory A3 is used to store the set threshold data and the data transmitted from the online ammonia concentration detector 16 and the online pressure detector 15.

[0047] Furthermore, the controller 18 is also connected to an alarm A5, and the central processor A4 controls the alarm A5 through the alarm module A-5. When the data transmitted by the online ammonia concentration detector 16 is not less than the first preset threshold, and the data transmitted by the online pressure detector 15 is not less than the second preset threshold, the central processor A4 controls the alarm A5 through the alarm module A-5, and the alarm A5 issues an alarm, indicating that the anaerobic digestion reactor 2 is not sufficiently sealed.

[0048] Furthermore, the controller 18 is also connected to a third comparator A6, and the central processor A4 controls the third comparator A6 through the third comparator control module A-6. The third comparator A6 is used to compare the data transmitted by the online ammonia concentration detector 16 with a third preset threshold value, and the third preset threshold value is smaller than the first preset threshold value. When the data transmitted by the online ammonia concentration detector 16 is not greater than the third preset threshold value, the central processor A4 closes the electromagnetic opening and closing valve 17 through the electromagnetic opening and closing valve control module A-3 to close the drug delivery pipeline 12.

[0049] Furthermore, the controller 18 is connected to the dosing metering pump 11, and the central processor A4 also includes a dosing metering pump control module A-4. The central processor A4 controls the dosing metering pump 11 through the dosing metering pump control module A-4. When the central processor A4 sends a control signal of the electromagnetic opening and closing valve 17, the dosing metering pump control module A-4 is triggered to send a control signal to the dosing metering pump 11, so as to control the electromagnetic opening and closing valve 17 and the dosing metering pump 11 at the same time.

[0050] Furthermore, the emergency adjustment method of the present invention comprises the following steps:

[0051] A. Emergency Adjustment of the Anti-Ammonia Inhibition Anaerobic System Under normal operation, the electromagnetic on-off valve 17 and the dosing metering pump 11 are in a closed state, the online ammonia concentration detector 16 and the online pressure detector 15 detect the ammonia concentration and pressure in the anaerobic digestion reactor 2 respectively, and transmit the detected data to the controller 18, and set the first preset threshold value in the first comparator A1 to 4000 mg / L, and the third preset threshold value in the third comparator A6 to 1500 mg / L;

[0052] B. The first comparator A1 and the third comparator A6 compare the data transmitted by the online ammonia concentration detector 16 with the first preset threshold and the third preset threshold respectively, and the second comparator A2 compares the data transmitted by the online pressure detector 15 with the second preset threshold, and transmits the comparison result to the central processor A4, which judges the comparison result;

[0053] C. When the data transmitted by the online ammonia concentration detector 16 is not less than the first preset threshold value, and the data transmitted by the online pressure detector 15 is less than the second preset threshold value, the central processor A4 opens the electromagnetic on-off valve 17 and the dosing metering pump 11 through the electromagnetic on-off valve control module A-3 and the dosing metering pump control module A-4 respectively, so that the agent enters the anaerobic digestion reactor 2 through the agent delivery pipeline 12;

[0054] D. When the data transmitted by the online ammonia concentration detector 16 is not less than the first preset threshold value, and the data transmitted by the online pressure detector 15 is not less than the second preset threshold value, the central processor A4 sends an execution signal to the alarm A5 through the alarm module A-5, and the alarm A5 sends an alarm;

[0055] E. When the data transmitted by the online ammonia concentration detector 16 is less than the first preset value and greater than the third preset threshold, the central processor A4 does not send any execution signal;

[0056] F. When the data transmitted by the online ammonia concentration detector 16 is not greater than the third preset threshold value, the central processor A4 closes the electromagnetic opening and closing valve 17 and the dosing metering pump 11 respectively through the electromagnetic opening and closing valve control module A-3 and the dosing metering pump control module A-4 to close the agent through the agent delivery pipeline 12.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An emergency adjustable ammonia suppression anaerobic system for the treatment of kitchen waste, characterized in that it include: A hydrolysis and acidification reactor is used for hydrolysis and acidification of organic slurry. The hydrolysis and acidification reactor is a closed container, the inlet of which is connected to the first organic slurry delivery pipeline, and the outlet of which is connected to the inlet of the anaerobic digestion reactor through the second organic slurry delivery pipeline; The anaerobic digestion reactor is used to process the feed liquid from the hydrolysis acidification reactor. The anaerobic digestion reactor is a closed container, and its outlet end is connected to the feed liquid discharge pipeline. The anaerobic digestion reactor is provided with a reagent interface, and the reagent interface is connected to the reagent dosing device through the reagent delivery pipeline. The reagent delivery pipeline is provided with an electromagnetic opening and closing valve, and the electromagnetic opening and closing valve is controlled by a controller; an online ammonia concentration detector and an online pressure detector are installed on the top cover of the anaerobic digestion reactor to respectively detect the ammonia concentration and pressure in the anaerobic digestion reactor; A flushing water collection tank is used to collect flushing water. The outlet end of the flushing water collection tank is connected to a flushing water pipeline. The flushing water pipeline is connected to an organic slurry delivery pipeline to return the flushing water to the hydrolysis acidification reactor. A delivery pump, a regulating valve and a flow meter are provided on the flushing water pipeline. An online ammonia concentration detector and an online pressure detector, wherein the probe of the online ammonia concentration detector extends into the organic slurry in the anaerobic digestion reactor to detect the free ammonia concentration in the organic slurry in real time, and the data output end of the online ammonia concentration detector is connected to the controller; the probe of the online pressure detector extends into the top of the anaerobic digestion reactor to detect the pressure in the anaerobic digestion reactor in real time, and the data output end of the online pressure detector is connected to the controller; A controller, used to process data from an online ammonia concentration detector and an online pressure detector, and control the opening and closing of the reagent delivery pipeline according to the data processing results; The controller is respectively connected with a first comparator, a second comparator, and a memory. The controller includes a central processing unit. The central processing unit controls the first comparator, the second comparator, and the electromagnetic on-off valve through a first comparator control module, a second comparator control module, and an electromagnetic valve control module. The first comparator and the second comparator are used to compare the data transmitted by the online ammonia concentration detector and the online pressure detector with a first preset threshold value and a second preset threshold value respectively. When the data transmitted by the online ammonia concentration detector is not less than the first preset threshold value, and the data transmitted by the online pressure detector is less than the second preset threshold value, the central processing unit opens the electromagnetic on-off valve through the electromagnetic on-off valve control module to allow the agent to enter the anaerobic digestion reactor through the agent delivery pipeline; the memory is used to store the set threshold data and the data transmitted from the online ammonia concentration detector and the online pressure detector; The online ammonia concentration detector is Amtax-NA8000 ， The online pressure detector is PMC131-A12F1A1S; the volume of the anaerobic digestion reactor is 5-7 times the volume of the hydrolysis acidification reactor.

2. The emergency adjustable ammonia suppression anaerobic system according to claim 1, characterized in that: The controller is also connected to an alarm, and the central processing unit controls the alarm through the alarm module. When the data transmitted by the online ammonia concentration detector is not less than the first preset threshold, and the data transmitted by the online pressure detector is not less than the second preset threshold, the central processing unit controls the alarm through the alarm module, and the alarm sounds an alarm.

3. The emergency adjustable ammonia suppression anaerobic system according to claim 2, characterized in that: The controller is also connected to a third comparator, and the central processing unit controls the third comparator through a third comparator control module. The third comparator is used to compare the data transmitted by the online ammonia concentration detector with a third preset threshold value, and the third preset threshold value is smaller than the first preset threshold value. When the data transmitted by the online ammonia concentration detector is not greater than the third preset threshold value, the central processing unit closes the electromagnetic opening and closing valve through the electromagnetic opening and closing valve control module to close the drug delivery pipeline.

4. The emergency adjustable ammonia suppression anaerobic system according to claim 3, characterized in that: A dosing metering pump is arranged on the drug delivery pipeline, the controller is connected to the dosing metering pump, the central processing unit also includes a dosing metering pump control module, the central processing unit controls the dosing metering pump through the dosing metering pump control module, and when the central processing unit sends an electromagnetic opening and closing valve control signal, it simultaneously triggers the dosing metering pump control module to send a control signal to the dosing metering pump, so as to control the electromagnetic opening and closing valve and the dosing metering pump at the same time.

5. The emergency adjustable anti-ammonia inhibition anaerobic system according to claim 4, characterized in that: The controller is a CMSA51 single chip microcomputer or a PLC controller.

6. The emergency adjustable anti-ammonia inhibition anaerobic system according to claim 5, characterized in that: The first preset threshold is 4000 mg / L ， The third preset threshold is 1500 mg / L.

7. An emergency adjustment method for an emergency adjustable anti-ammonia inhibition anaerobic system according to any one of claims 4 to 6, characterized in that: The following steps are involved: A. Emergency adjustment of the anti-ammonia inhibition anaerobic system. Under normal operation, the electromagnetic on-off valve and the dosing metering pump are in a closed state, the online ammonia concentration detector and the online pressure detector detect the ammonia concentration and pressure in the anaerobic digestion reactor respectively, and transmit the detected data to the controller, and set the first preset threshold value in the first comparator to 4000 mg / L, and the third preset threshold value in the third comparator to 1500 mg / L; B. The first comparator and the third comparator compare the data transmitted by the online ammonia concentration detector with the first preset threshold and the third preset threshold respectively, and the second comparator compares the data transmitted by the online pressure detector with the second preset threshold, and transmits the comparison result to the central processor, which judges the comparison result; C. When the data transmitted by the online ammonia concentration detector is not less than the first preset threshold value, and the data transmitted by the online pressure detector is less than the second preset threshold value, the central processing unit opens the electromagnetic opening and closing valve and the dosing metering pump through the electromagnetic opening and closing valve control module and the dosing metering pump control module respectively, so that the agent enters the anaerobic digestion reactor through the agent delivery pipeline; D. When the data transmitted by the online ammonia concentration detector is not less than the first preset threshold value, and the data transmitted by the online pressure detector is not less than the second preset threshold value, the central processor sends an execution signal to the alarm through the alarm module, and the alarm sounds an alarm; E. When the data transmitted by the online ammonia concentration detector is less than the first preset value and greater than the third preset threshold, the central processing unit does not send any execution signal; F. When the data transmitted by the online ammonia concentration detector is not greater than the third preset threshold value, the central processing unit closes the electromagnetic opening and closing valve and the dosing metering pump through the electromagnetic opening and closing valve control module and the dosing metering pump control module respectively, so that the agent is closed through the agent delivery pipeline.

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