A control system for realizing oxygen-enriched combustion by using pulse waste oxygen

Abstract

The utility model application provides a kind of control system for realizing oxygen-enriched combustion using pulse waste oxygen, it is related to waste oxygen recovery technical field, the control system for realizing oxygen-enriched combustion using pulse waste oxygen includes: intelligent control device, oxygen-enriched combustion realization device, the oxygen-enriched combustion realization device includes N pulse waste oxygen pipeline, pressure-equalizing collection box and by process pipeline sequentially connected pulse waste oxygen processing unit, oxygen-enriched mixing unit, combustion-supporting fan and combustor;The intelligent control device includes automatic control equipment, valve actuator.Affirmative effect: the control system for realizing oxygen-enriched combustion using pulse waste oxygen is by buffering pressure stabilization, gas mixing and intelligent control technology, the originally discarded pulse oxygen-enriched waste gas in PSA nitrogen production process is stably transported to combustion system, reduces oxygen-enriched combustion cost, improves energy utilization rate, reduces waste gas emission.

Description

Technical Field

[0001] This utility model application relates to the field of waste oxygen recovery technology, specifically to a control system that utilizes pulsed waste oxygen to achieve oxygen-enriched combustion. Background Technology

[0002] Pressure swing adsorption (PSA) nitrogen generation technology is a gas separation process based on the selective adsorption of oxygen and nitrogen by carbon molecular sieves. In this process, compressed air is pretreated before entering the adsorption tower. The carbon molecular sieves preferentially adsorb impurities such as oxygen and carbon dioxide, while nitrogen, due to its slower diffusion rate, is discharged from the top of the tower, forming a high-purity nitrogen product. Subsequently, the adsorption tower is depressurized to achieve desorption and regeneration of the carbon molecular sieves, releasing the adsorbed oxygen and other impurities. Simultaneously, another adsorption tower switches to adsorption mode, and the two towers alternately cycle to achieve continuous nitrogen production.

[0003] However, in traditional PSA nitrogen production processes, the oxygen-enriched gas (typically with an oxygen concentration of 25%–30%) released during the desorption stage is usually directly vented in pulses, failing to be effectively recovered and utilized. While the oxygen purity in this gas is lower than that of products from professional PSA oxygen production processes (typically 90%–99.9%), it still has significant industrial application value, such as in enhanced combustion, wastewater treatment, and oxygen-enriched combustion. Direct venting not only wastes energy but also increases system operating costs, contradicting the trend of green and low-carbon industrial development.

[0004] Currently, the main methods for obtaining oxygen-enriched gas in industry include cryogenic air separation, membrane separation, and PSA oxygen production. However, these methods typically require additional equipment and energy consumption, resulting in low economic efficiency. Therefore, how to efficiently and cost-effectively recover the pulsed oxygen-enriched gas desorbed in processes such as PSA nitrogen production, and optimize its utilization, has become a pressing technical problem to be solved in this field. Utility Model Content

[0005] In view of the problems existing in the current methods of obtaining oxygen-enriched gas, this utility model proposes a device for using pulsed waste oxygen for oxygen-enriched combustion.

[0006] A control system for achieving oxygen-enriched combustion using pulsed waste oxygen includes:

[0007] Intelligent control device and oxygen-enriched combustion realization device, wherein the intelligent control device is connected to the oxygen-enriched combustion realization device;

[0008] The oxygen-enriched combustion device includes N pulsed waste oxygen pipelines, a pressure equalization collection box, and a pulsed waste oxygen treatment unit, an oxygen-enriched mixing unit, a combustion-supporting fan, and a burner connected in sequence through process pipelines.

[0009] The intelligent control device includes an automatic control device and a valve actuator. The signal receiving end of the valve actuator is connected to the automatic control device, and the signal output end of the valve actuator is connected to the pulse-type waste oxygen treatment unit and the oxygen-enriched mixing unit, respectively.

[0010] Optionally, the automatic control device adopts a PLC controller or a DDC controller, and the automatic control device is connected to a cloud control platform via wired or wireless communication.

[0011] Optionally, the intelligent control device can be controlled via a cloud-based control platform on a computer or mobile terminal.

[0012] Optionally, the pulse-type waste oxygen treatment unit includes a first protective valve group, a pre-filter, a pressure regulating valve, an oxygen-enriched air booster, a post-filter, and a second protective valve group, which are connected in sequence through process pipelines.

[0013] Optionally, the first protective valve group adopts a pneumatic protective valve or an electric protective valve, and the pneumatic protective valve and the electric protective valve are installed in parallel on the process pipeline.

[0014] Optionally, the second protection valve assembly is a pneumatic protection valve.

[0015] Optionally, the signal output terminal of the valve actuator is connected to the protection valves of the first protection valve group and the second protection valve group, respectively.

[0016] Optionally, the oxygen-enriched mixing unit includes an oxygen-enriched air regulating valve and a natural air regulating valve connected in sequence through a process pipeline.

[0017] Optionally, the oxygen-enriched air regulating valve or the natural air regulating valve may be a manual valve, an electric regulating valve, or a pneumatic regulating valve.

[0018] Optionally, the pulsed waste oxygen gas includes pulsed oxygen-enriched waste gas that was originally discarded during the PSA nitrogen production process or oxygen-enriched waste gas from other areas of the process industry.

[0019] In summary, the control system for achieving oxygen-enriched combustion using pulsed waste oxygen described in this application has the following advantages:

[0020] 1. The control system designed in this utility model utilizes pulsed waste oxygen to achieve oxygen-enriched combustion. Through buffering and stabilizing, gas mixing and intelligent control technologies, the pulsed oxygen-enriched waste gas that was originally wasted in the PSA nitrogen production process is stably transported to the combustion system, which reduces the cost of oxygen-enriched combustion, improves energy utilization, and reduces waste gas emissions.

[0021] 2. In this utility model, the start-stop of the oxygen-enriched air booster is interlocked with the electric protection valve in the first protection valve group, which avoids system pressure fluctuations caused by booster failure and further reduces safety risks. At the same time, the first protection valve group and the second protection valve group form a double redundancy protection, which automatically adjusts when the system pressure is abnormal to prevent the equipment from being over-pressured or under-pressured, and to ensure oxygen purity and overall safety. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the oxygen-enriched combustion realization device described in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the overall structure of the control system for achieving oxygen-enriched combustion using pulsed waste oxygen, as described in an embodiment of this utility model.

[0025] Attached diagram: 1. Pulse waste oxygen pipeline; 2. Pressure equalization collection box; 3. First protection valve group; 4. Pre-filter; 5. Pressure stabilizing valve; 6. Oxygen-enriched air booster; 7. Post-filter; 8. Second protection valve group; 9. Oxygen-enriched air regulating valve; 10. Natural air regulating valve; 11. Combustion fan; 12. Burner; 13. Process pipeline. Detailed Implementation

[0026] To make this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Example 1: An oxygen-enriched combustion device

[0029] An oxygen-enriched combustion device, such as Figure 1 As shown, it includes:

[0030] N pulse waste oxygen pipelines 1, pressure equalization collection box 2, and pulse waste oxygen treatment unit 10, oxygen enrichment mixing unit 20, combustion fan 11 and burner 12 are connected in sequence through process pipeline 13.

[0031] When the PSA nitrogen generator discharges waste oxygen gas with pulse characteristics, the pressure equalization collection box 2 can effectively buffer the pulse pressure fluctuations, avoid the problem of exhaust obstruction caused by local high pressure accumulation at the waste oxygen discharge port, and thus ensure the stable operation of key industrial equipment such as nitrogen generators under constant pressure conditions, reducing the risk of equipment shutdown caused by abnormal gas pressure.

[0032] The pulsed waste oxygen treatment unit 10 includes: a first protective valve group 3, a pre-filter 4, a pressure stabilizing valve 5, an oxygen-enriched air booster 6, a post-filter 7, and a second protective valve group 8, which are connected sequentially through a process pipeline 13. In this embodiment, the oxygen-enriched air booster 6 is preferably an air-compressed suspension fan (box structure). The first protective valve group 3 adopts a configuration of pneumatic and electric protective valves in parallel. The second protective valve group 8 is composed of pneumatic protective valves. The first protective valve group 3 is used to control the pressure at the waste oxygen gas discharge port of the nitrogen generator to be at normal pressure or slightly negative pressure, so as to avoid pressure buildup that would affect the purity of the nitrogen produced by the nitrogen generator.

[0033] The oxygen-enriched mixing device 200 includes an oxygen-enriched air regulating valve 9 and a natural air regulating valve 10 connected in sequence through a process pipeline 13. The oxygen-enriched air regulating valve 9 and the natural air regulating valve 10 can be manual valves, electric regulating valves or pneumatic regulating valves.

[0034] Example 2: A control system for achieving oxygen-enriched combustion using pulsed waste oxygen.

[0035] A control system that utilizes pulsed waste oxygen to achieve oxygen-enriched combustion, such as... Figure 2 As shown, it includes:

[0036] The intelligent control device is connected to the oxygen-enriched combustion realization device described in Example 1.

[0037] The intelligent control device includes an automatic control unit and a valve actuator. The signal receiving end of the valve actuator is connected to the automatic control unit, and the signal output end of the valve actuator is connected to the pulse-type waste oxygen treatment unit and the oxygen-enriched mixing unit, respectively. The automatic control unit adopts a PLC (Programmable Logic Controller) controller or a DDC (Direct Digital Controller) controller, and the automatic control unit is connected to a cloud control platform via wired or wireless communication.

[0038] The control process for achieving oxygen-enriched combustion using pulsed waste oxygen includes:

[0039] Pulsed waste oxygen gas generated in industrial production scenarios such as PSA nitrogen generators is collected through pulsed waste oxygen pipeline 1 and temporarily buffered in pressure equalization collection tank 2. After pressure stabilization treatment in pressure equalization collection tank 2, the waste oxygen gas enters process pipeline 13, then flows through the first protection valve group 3 and enters the pre-filter 4 to filter out impurities such as water vapor. The oxygen-enriched gas obtained after pre-filtration is further pressure-stabilized by pressure regulating valve 5, finally obtaining stable oxygen-enriched gas with a concentration of 25%~30% and a pressure of 0.9 kPa.

[0040] The oxygen-enriched gas then enters the oxygen-enriched air booster 6 for pressurization, obtaining oxygen-enriched gas at a pressure of approximately 21 kPa. This pressurized oxygen-enriched gas is then further filtered by the post-filter 7 to obtain appropriately pressurized and pure oxygen-enriched gas, thereby reducing pollutant emissions during combustion and extending the service life of equipment such as the burner 12. The oxygen-enriched gas then passes sequentially through the second protection valve group 8 and the oxygen-enriched air regulating valve 9, mixing proportionally with air regulated by the natural air regulating valve 10 to ultimately form an oxygen-enriched mixed gas that meets process requirements. This oxygen-enriched mixed gas is then transported to the burner 12 by the combustion fan 11. The burner 12 introduces the oxygen-enriched gas into the kiln combustion system, which can improve the flame temperature and combustion efficiency within the kiln. For example, using oxygen-enriched combustion in a glass melting furnace can reduce fuel consumption by 15-20% while also reducing nitrogen oxide emissions.

[0041] When the pressure of the oxygen-enriched gas in the system exceeds the alarm value, the oxygen-enriched gas is automatically vented to the outside through the electric protection valve. When the pressure of the system is lower than the alarm value, the pneumatic protection valves in the first protection valve group 3 and the second protection valve group 8 automatically open to draw in air, so as to protect the nitrogen generator for safe and stable operation.

[0042] Meanwhile, the start and stop of the oxygen-enriched air booster 6 is interlocked with the electric protection valve in the first protection valve group 3. When the oxygen-enriched air booster 6 stops, the electric protection valve automatically opens, directly discharging the oxygen-enriched gas into the atmosphere; when the oxygen-enriched air booster 6 starts, the electric protection valve automatically closes after a delay.

[0043] During this process, the signal receiving end of the valve actuator is connected to the automatic control equipment via a signal line. The signal output end of the valve actuator is connected to the protection valves of the first and second protection valve groups, respectively, to control the start, stop, and opening degree of each valve. The automatic control equipment is connected to the cloud control platform via wired or wireless communication. Operators can log in to the cloud control platform via computer or mobile terminal and use software programs to achieve intelligent digital management and remote operation and maintenance of the device. Intelligent control technology is mainly used to stabilize the gas pressure within the system and ensure the stable operation of the pipeline network.

[0044] This invention designs a control system for achieving oxygen-enriched combustion using pulsed waste oxygen. Through buffering and stabilizing, gas mixing, and intelligent control technologies, it stably delivers the pulsed oxygen-enriched waste gas, which was originally discarded during the PSA nitrogen production process, to the combustion system. This reduces the cost of oxygen-enriched combustion, improves energy utilization, and reduces waste gas emissions. The start and stop of the oxygen-enriched air booster are interlocked with the electric protection valve in the first protection valve group, avoiding system pressure fluctuations caused by booster failure and further reducing safety risks. At the same time, the first and second protection valve groups form a dual redundancy protection system, automatically adjusting when the system pressure is abnormal to prevent overpressure or negative pressure in the equipment, ensuring oxygen purity and overall safety.

[0045] Finally, it should be noted that any modification or equivalent substitution of some or all of the technical features based on the technical solution of the present utility model device structure and the described embodiments, which does not depart from the corresponding technical solution of this patent, shall fall within the patent scope of the present utility model device structure and the described implementation.

Claims

1. A control system for achieving oxygen-enriched combustion using pulsed waste oxygen, characterized in that, include: Intelligent control device and oxygen-enriched combustion realization device, wherein the intelligent control device is connected to the oxygen-enriched combustion realization device; The oxygen-enriched combustion device includes N pulsed waste oxygen pipelines, a pressure equalization collection box, and a pulsed waste oxygen treatment unit, an oxygen-enriched mixing unit, a combustion-supporting fan, and a burner connected in sequence through process pipelines. The intelligent control device includes an automatic control device and a valve actuator. The signal receiving end of the valve actuator is connected to the automatic control device, and the signal output end of the valve actuator is connected to the pulse-type waste oxygen treatment unit and the oxygen-enriched mixing unit, respectively.

2. The control system for achieving oxygen-enriched combustion using pulsed waste oxygen as described in claim 1, characterized in that, The automatic control equipment uses a PLC controller or a DDC controller, and the automatic control equipment is connected to the cloud control platform via wired or wireless communication.

3. The control system for achieving oxygen-enriched combustion using pulsed waste oxygen as described in claim 1, characterized in that, The intelligent control device can be controlled via a cloud-based control platform using a computer or mobile terminal.

4. The control system for achieving oxygen-enriched combustion using pulsed waste oxygen as described in claim 1, characterized in that, The pulsed waste oxygen treatment unit includes a first protective valve group, a pre-filter, a pressure regulating valve, an oxygen-enriched air booster, a post-filter, and a second protective valve group, which are connected in sequence through process pipelines.

5. A control system for achieving oxygen-enriched combustion using pulsed waste oxygen according to claim 4, characterized in that, The first protective valve group adopts a pneumatic protective valve or an electric protective valve, and the pneumatic protective valve and the electric protective valve are installed in parallel on the process pipeline.

6. A control system for achieving oxygen-enriched combustion using pulsed waste oxygen according to claim 4, characterized in that, The second protection valve group uses a pneumatic protection valve.

7. A control system for achieving oxygen-enriched combustion using pulsed waste oxygen according to claim 5 or 6, characterized in that, The signal output terminal of the valve actuator is connected to the protection valves of the first protection valve group and the second protection valve group, respectively.

8. A control system for achieving oxygen-enriched combustion using pulsed waste oxygen according to claim 1, characterized in that, The oxygen-enriched mixing unit includes an oxygen-enriched air conditioning valve and a natural air conditioning valve connected in sequence through process pipelines.

9. A control system for achieving oxygen-enriched combustion using pulsed waste oxygen according to claim 8, characterized in that, The oxygen-enriched air regulating valve and the natural air regulating valve are manual valves, electric regulating valves, or pneumatic regulating valves.

10. A control system for achieving oxygen-enriched combustion using pulsed waste oxygen according to claim 1, characterized in that, The pulsed waste oxygen gas includes pulsed oxygen-enriched waste gas that was originally discarded during the PSA nitrogen production process or oxygen-enriched waste gas from other areas of the process industry.

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