RTO system for waste liquid incineration

Abstract

The utility model provides a kind of RTO system of waste liquid incineration, including regenerative oxidizing furnace, waste liquid supply pipeline, compressed air pipeline, cooling air pipeline, the import end of waste liquid supply pipeline is connected with liquid storage tank, and export end is connected with combustion chamber through nozzle;Waste liquid supply pipeline is equipped with high-pressure pump, flow regulating valve, pair of arrangement's cut-off valve, pressure gauge and pressure switch;Compressed air pipeline is equipped with pneumatic pressure booster, pressure gauge and pressure switch;Compressed air pipeline is connected with combustion chamber by atomization compressed air branch and purging compressed air branch respectively.The utility model is assisted waste liquid atomization by atomization compressed air branch, and the pressure booster on branch is cooperated with signal valve swirl nozzle, so that droplet is refined, and cone angle is stable, waste liquid atomization quality is controlled, and wall hanging and black smoke are reduced;And, independent purging branch is emptied and dried to nozzle and RTO in time after shutdown or exception, and restart time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid heat treatment technology, and in particular to an RTO system for waste liquid incineration treatment. Background Technology

[0002] Regenerative thermal oxidizers, also known as regenerative oxidizers (RTOs), consist of a regenerator chamber (lower chamber) and a high-temperature combustion chamber (upper chamber). Based on the chemical composition and flow rate of the waste liquid, the waste liquid enters the combustion chamber for combustion, while low-concentration waste gas enters the regenerator chamber for preheating and then undergoes high-temperature oxidation.

[0003] For liquid organic waste with complex sources and fluctuating calorific values, direct atomization and injection into the combustion chamber for thermal oxidation has the advantages of short process and high thermal efficiency. However, it is often limited by the following problems in engineering practice: 1. The atomization quality and spray direction of the waste liquid are uncontrollable, which easily leads to liquid residue on the wall and secondary pollution; 2. When the gas-liquid supply pressure fluctuates or becomes abnormal, there is a lack of rapid cutoff and positive check valve, which poses a risk of backfire / reverse flow.

[0004] Therefore, there is an urgent need for a new RTO system to achieve overall control over the waste liquid injection state and the safety state. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an RTO system for waste liquid incineration treatment, which solves the problems of uncontrollable waste liquid spraying state, easy occurrence of wall liquid residue and secondary pollution, and poor system safety in the prior art.

[0006] To achieve the above and other related objectives, this utility model provides an RTO system for waste liquid incineration treatment, comprising: A regenerative oxidizer includes a combustion chamber and a regenerator, wherein the combustion chamber is located above the regenerator; The waste liquid supply pipeline has an inlet end connected to a storage tank and an outlet end connected to a combustion chamber via a nozzle; the waste liquid supply pipeline is equipped with a high-pressure pump, a flow regulating valve, a pair of shut-off valves, a pressure gauge, and a pressure switch. The compressed air pipeline is equipped with a pneumatic booster valve, a pressure gauge, and a pressure switch; the compressed air pipeline is connected to the combustion chamber via an atomizing compressed air branch and a purging compressed air branch. The cooling air pipeline is equipped with a fan, a pressure gauge and a regulating valve.

[0007] In one embodiment of this utility model, a shut-off valve, a signal valve, and a check valve are provided on the atomizing compressed air branch; a shut-off valve and a check valve are provided on the purging compressed air branch.

[0008] In one embodiment of this utility model, the outlet end of the atomizing compressed air branch is connected to a nozzle to assist in the atomization of waste liquid.

[0009] In one embodiment of this utility model, the nozzle is a high-temperature resistant swirling atomizing nozzle.

[0010] In one embodiment of this utility model, the injection direction of the waste liquid forms an angle of 30°-60° with the direction of the high-temperature main airflow in the combustion chamber.

[0011] In one embodiment of this utility model, a check valve is also provided on the waste liquid supply pipeline.

[0012] In one embodiment of this utility model, some connecting pipes of the waste liquid supply pipeline, the atomizing compressed air branch, the purging compressed air branch, and the cooling air pipeline are made of flexible hoses.

[0013] In one embodiment of this utility model, manual ball valves are respectively installed at the inlet ends of the waste liquid supply pipeline and the compressed air pipeline.

[0014] In one embodiment of this utility model, a manual regulating valve is also provided at the outlet end of the purging compressed air branch and the cooling air pipeline.

[0015] In one embodiment of this utility model, an interlocking control module is also included, which is connected to a pressure gauge, a pressure switch and a shut-off valve respectively; when the pressure on the pipeline cannot meet the process requirements, the system is shut off.

[0016] As described above, the RTO system for waste liquid incineration of this invention has the following beneficial effects: 1. This utility model uses an atomizing compressed air branch to assist in the atomization of waste liquid. The booster valve and signal valve on the branch work with the swirling nozzle to refine the droplets and stabilize the cone angle, thereby controlling the atomization quality of the waste liquid and reducing wall adhesion and black smoke. In addition, the independent purging branch can promptly clean and dry the nozzle and RTO after shutdown or abnormality, shortening the restart time.

[0017] 2. Paired shut-off valves and check valves on the waste liquid supply pipeline, together with pressure interlocks, form a safety barrier of "no commissioning without pressure, immediate shutdown in case of abnormality"; and, based on the interlock control module of pressure gauge / pressure switch, automatic shutdown in case of failure is realized, improving the reliability and standardization of the system. It is suitable for online or intermittent incineration treatment of waste liquid containing organic components in industries such as chemical, coating, electronics, and pharmaceutical, and has good engineering feasibility and promotion value. Attached Figure Description

[0018] Figure 1 The diagram shown is a structural schematic of the RTO system for waste liquid incineration disclosed in an embodiment of this utility model.

[0019] Component designation explanation 100. Regenerative oxidizer; 200. Waste liquid supply pipeline; 300. Compressed air pipeline; 310. Atomizing compressed air branch; 320. Purging compressed air branch; 400. Cooling air pipeline; 1. Manual ball valve; 2. Pressure gauge; 3. Pressure switch; 4. Shut-off valve; 5. Flow regulating valve; 6. Signal valve; 7. Check valve; 8. Hoses; 9. Pneumatic booster valve; 10. Manual regulating valve; 11. Fan. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] Please see Figure 1 This utility model provides an RTO system for waste liquid incineration, including a regenerative thermal oxidizer 100, a waste liquid supply pipeline 200, a compressed air pipeline 300, a cooling air pipeline 400, and an interlock control module.

[0022] The regenerative thermal oxidizer 100 (RTO) includes a combustion chamber and a regenerator chamber, with the combustion chamber located above the regenerator chamber.

[0023] The inlet end of the waste liquid supply pipeline 200 is connected to a storage tank, and the outlet end is connected to the combustion chamber via a nozzle. The storage tank is connected to the waste liquid supply pipeline 200 via a high-pressure pump. From the inlet end to the outlet end, the waste liquid supply pipeline 200 is equipped with a manual ball valve 1, a pressure gauge 2, a pressure switch 3, a pair of shut-off valves 4, a flow regulating valve 5, and a check valve 7. Some connecting pipes of the waste liquid supply pipeline 200 use flexible hoses 8. The nozzle is a high-temperature resistant swirl atomizing nozzle. The spray direction forms a 30°-60° angle with the high-temperature main airflow direction in the combustion chamber to balance atomization and mixing while avoiding wall erosion.

[0024] The compressed air pipeline 300 is equipped with a manual ball valve 1, a pneumatic booster valve 9, a pressure gauge 2, and a pressure switch 3 sequentially from the inlet end. The compressed air pipeline 300 is connected to the combustion chamber via an atomizing compressed air branch 310 and a purging compressed air branch 320. The atomizing compressed air branch 310 is equipped with a shut-off valve 4, a signal valve 6, and a check valve 7 sequentially. The outlet end of the atomizing compressed air branch 310 is connected to a nozzle to assist in waste liquid atomization. The pneumatic booster valve 9 on the atomizing compressed air branch 310 sets the outlet pressure according to the target atomization intensity; the signal valve 6 is used for local / remote status feedback. The flow regulating valve 5 on the waste liquid supply pipeline 200 is used to set the metering pump output to ensure matching with the atomizing air volume. The purging compressed air branch 320 is equipped with a shut-off valve 4, a check valve 7, and a manual regulating valve 10 sequentially. A portion of the connecting pipelines between the atomizing compressed air branch 310 and the purging compressed air branch 320 uses flexible hoses 8.

[0025] The outlet end of the cooling air pipeline 400 is connected to the regenerative oxidizer 100. From the inlet to the outlet end, the cooling air pipeline 400 is equipped with a fan 11, a pressure gauge 2, a regulating valve 5, and a manual regulating valve 10. Some connecting pipes of the cooling air pipeline 400 are made of flexible hoses 8.

[0026] The interlocking control module is connected to pressure gauge 2, pressure switch 3 and shut-off valve 4 respectively; if any pressure switch 3 detects a low pressure or high pressure abnormality, the interlocking control module will immediately close the corresponding shut-off valve 4, and if necessary, shut down the entire system and trigger an alarm.

[0027] Furthermore, the manual ball valve 1 at the inlet end, combined with the paired shut-off valve 4, can realize a maintenance safety strategy of "dual valve isolation + intermediate venting".

[0028] Furthermore, by installing temperature- and corrosion-resistant hoses 8 at locations such as nozzle interfaces, thermal expansion and vibration can be absorbed, reducing flange stress.

[0029] Start-stop and interlocking sequence: Start-up phase: First, open the cooling air line to form an air curtain; after confirming that the compressed air line pressure has reached the set value, open the shut-off valve of the atomizing compressed air branch. Once the atomization pressure stabilizes, the interlock control module allows the high-pressure pump to run and opens the paired shut-off valves on the waste liquid supply pipeline to initiate feeding. Shutdown phase: First, close the shut-off valve on the waste liquid supply pipeline and stop the pump, and maintain the atomized gas for a few seconds; then switch to open the purging branch to purge the nozzle and liquid path, and finally close the atomization branch and cooling branch in sequence.

[0030] In summary, this invention utilizes an atomizing compressed air branch to assist in waste liquid atomization. The booster valve and signal valve on this branch, in conjunction with the swirling nozzle, refine the droplets and stabilize the cone angle, controlling the atomization quality and reducing wall adhesion and black smoke. Furthermore, an independent purging branch promptly empties and dries the nozzle and RTO after shutdown or abnormality, shortening restart time. Additionally, paired shut-off valves and check valves on the waste liquid supply pipeline, interlocked with pressure, form a safety barrier of "no operation without pressure, immediate shutdown in case of abnormality." Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0031] The terms used in this specification, such as "upper", "lower", "left", "right", "front", "back", "middle" and "one", are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0032] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An RTO system for waste liquid incineration treatment, characterized in that, include: A regenerative oxidizer includes a combustion chamber and a regenerator, wherein the combustion chamber is located above the regenerator; The waste liquid supply pipeline has an inlet end connected to a storage tank and an outlet end connected to a combustion chamber via a nozzle; the waste liquid supply pipeline is equipped with a high-pressure pump, a flow regulating valve, a pair of shut-off valves, a pressure gauge, and a pressure switch. The compressed air pipeline is equipped with a pneumatic booster valve, a pressure gauge, and a pressure switch; the compressed air pipeline is connected to the combustion chamber via an atomizing compressed air branch and a purging compressed air branch. The cooling air pipeline is equipped with a fan, a pressure gauge and a regulating valve.

2. The RTO system for waste liquid incineration treatment according to claim 1, characterized in that, The atomizing compressed air branch is equipped with a shut-off valve, a signal valve, and a check valve; the purging compressed air branch is equipped with a shut-off valve and a check valve.

3. The RTO system for waste liquid incineration treatment according to claim 2, characterized in that, The outlet end of the atomizing compressed air branch is connected to a nozzle to assist in the atomization of waste liquid.

4. The RTO system for waste liquid incineration treatment according to claim 3, characterized in that, The nozzle is a high-temperature resistant swirling atomizing nozzle.

5. The RTO system for waste liquid incineration treatment according to claim 1, characterized in that, The direction of the waste liquid injection forms an angle of 30°-60° with the direction of the high-temperature main airflow in the combustion chamber.

6. The RTO system for waste liquid incineration treatment according to claim 1, characterized in that, The waste liquid supply pipeline is also equipped with a check valve.

7. The RTO system for waste liquid incineration treatment according to claim 1, characterized in that, The waste liquid supply pipeline, atomizing compressed air branch, purging compressed air branch, and cooling air pipeline are partially connected by flexible hoses.

8. The RTO system for waste liquid incineration treatment according to claim 1, characterized in that, Manual ball valves are installed at the inlet ends of the waste liquid supply pipeline and the compressed air pipeline, respectively.

9. The RTO system for waste liquid incineration treatment according to claim 1, characterized in that, The outlet ends of the purging compressed air branch and the cooling air pipeline are also equipped with manual regulating valves.

10. The RTO system for waste liquid incineration treatment according to any one of claims 1 to 9, characterized in that, It also includes an interlock control module, which is connected to a pressure gauge, a pressure switch, and a shut-off valve; when the pressure on the pipeline cannot meet the process requirements, the system is shut down.

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