A hydrothermal conversion device for bamboo processing wastewater

Abstract

The application discloses a kind of hydrothermal conversion devices of bamboo processing wastewater, it is related to bamboo processing device technical field, including kettle body and kettle cover;Kettle cover is used to close the bottom of kettle body;The inner top of kettle body is provided with ozone generator;The upper part of the outside of kettle body is provided with heating furnace, and heating furnace is used to heat wastewater in kettle body;The middle part of the outside of kettle body is provided with heat preservation cover;The lower part of the outside of kettle body is provided with cold water jacket;It further includes feeding system, and the discharge end of feeding system is connected with the inside of kettle body in penetration kettle cover.This application hydrothermal conversion device of bamboo processing wastewater, using reaction kettle upside-down design, kettle body top is equipped with heating jacket body, kettle cover is designed in kettle body bottom, cooling device is equipped between kettle body and kettle cover, kettle body bottom and kettle cover keep within 220 DEG C, can be sealed using polytetrafluoroethylene O ring.And design has high pressure pump and discharge port, realize bamboo processing wastewater large flux, continuous processing target.

Description

Technical Field

[0001] This invention relates to the field of bamboo processing equipment technology, and in particular to a hydrothermal conversion device for bamboo processing wastewater. Background Technology

[0002] Bamboo is a renewable resource that grows quickly, is widely distributed, and has a high yield. Bamboo dyeing is a way to process bamboo products, which can effectively improve the weather resistance and aesthetics of bamboo, but it also produces wastewater containing organic nitrogen.

[0003] Existing research shows that supercritical hydrothermal oxidation can be used to treat bamboo heat treatment wastewater, achieving a degradation rate of over 95% for organic nitrogen substances. This is a rapid and efficient treatment method for this type of wastewater.

[0004] However, supercritical water requires pressures exceeding 220 atmospheres and temperatures exceeding 374°C. These conditions are quite demanding. In laboratory settings, a thick-walled capillary quartz tube is used, sealed at both ends via a hydrogen-flame oxygen generator, and then heated in a high-temperature furnace to achieve supercritical hydrothermal conditions. This method processes samples in milliliters and is primarily used for laboratory research. Another method uses a pressure-resistant metal vessel to generate supercritical hydrothermal conditions, but this type of equipment suffers from difficulties in sealing the vessel body and lid. Since supercritical hydrothermal temperatures exceed 374°C, most polymer materials cannot withstand such high temperatures. Therefore, existing equipment generally employs two methods to address this: one is to design a copper metal hard sealing ring between the vessel body and lid, utilizing the good ductility of copper to achieve a seal. However, copper layers lack elastic recovery, so the sealing effect deteriorates drastically after repeated use. The other method uses a graphite gasket between the vessel body and lid for sealing, but under high temperature and pressure, graphite gaskets are often disposable components and are expensive.

[0005] In summary, the sealing of the vessel body and lid has become a bottleneck problem in the supercritical hydrothermal process for wastewater conversion and utilization. Summary of the Invention

[0006] The purpose of this invention is to provide a hydrothermal conversion device for bamboo processing wastewater to solve the problems existing in the prior art. Taking bamboo processing dyeing wastewater as the treatment target, it achieves the goal of continuous and large-capacity treatment through supercritical hydrothermal oxidation. The entire hydrothermal reactor body can easily achieve the sealing target of supercritical hydrothermal treatment and can be reused multiple times, which is green and pollution-free to the environment.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] This invention provides a hydrothermal conversion device for bamboo processing wastewater, comprising a vessel body and a vessel lid; the bottom of the vessel body is open, and the vessel lid is disposed at the open bottom of the vessel body, the vessel lid being used to close the bottom of the vessel body; an ozone generator is disposed at the inner top of the vessel body, the ozone generator being used for the oxidation of organic nitrogen chemicals in the wastewater under supercritical hydrothermal conditions; a heating furnace is disposed at the upper middle part of the exterior of the vessel body, the heating furnace being used to heat the wastewater inside the vessel body; an insulation jacket is disposed at the middle part of the exterior of the vessel body; a cold water jacket is disposed at the lower middle part of the exterior of the vessel body; and a feeding system is also included, the discharge end of the feeding system penetrating the vessel lid and communicating with the interior of the vessel body.

[0009] Optionally, the feeding system includes a booster pump and a feeding tank; the inlet of the booster pump is connected to the feeding tank, and the outlet of the booster pump is connected to the interior of the vessel body through a pipeline passing through the vessel cover.

[0010] Optionally, a pressure gauge is provided at the bottom of the vessel lid, and the pressure gauge is used to detect the pressure inside the vessel.

[0011] Optionally, a radiation-proof and convection-proof baffle is provided at the top of the insulation sleeve inside the vessel body. The radiation-proof and convection-proof baffle is used to prevent energy transfer between the water in the upper part of the vessel body under supercritical conditions and the water in the middle part of the vessel body.

[0012] Optionally, the radiation shielding and convection baffle is made of silver-plated zinc plate.

[0013] Optionally, a storage system is also included, which includes a storage tank and a discharge pipe; one end of the discharge pipe is located at the top of the vessel body, and the other end of the discharge pipe extends downward along the interior of the vessel body, passes through the vessel cover, and connects to the storage tank.

[0014] Optionally, a temperature sensor is also included, which extends through the lid to the inner top of the vessel body, and is used to measure the supercritical hydrothermal temperature at the inner top of the vessel body.

[0015] Optionally, the cold water jacket is provided with a circulating water inlet and outlet.

[0016] Optionally, the vessel body and the vessel lid are connected by fastening bolts.

[0017] The present invention achieves the following technical effects compared to the prior art:

[0018] This invention relates to a hydrothermal conversion device for bamboo processing wastewater. The device employs an inverted reactor design, with a heating jacket at the top and the reactor lid positioned at the bottom. A cooling device is installed between the reactor body and the lid, maintaining the temperature of both the bottom and lid below 220°C. A polytetrafluoroethylene (PTFE) O-ring can be used for sealing. The device also includes a high-pressure pump and a discharge port, enabling high-volume, continuous treatment of bamboo processing wastewater. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the hydrothermal conversion device for bamboo processing wastewater in this invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Inductive ozone generator; 2. Heating furnace; 3. Insulation jacket; 4. Cold water jacket; 5. Kettle lid; 6. Fastening bolts; 7. Booster pump; 8. Pressure gauge; 9. Temperature sensor; 10. Feeding tank; 11. Discharge pipe; 12. Radiation protection and convection baffle; 13. Circulating water inlet and outlet; 14. Storage tank. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The purpose of this invention is to provide a hydrothermal conversion device for bamboo processing wastewater to solve the problems existing in the prior art. Taking bamboo processing dyeing wastewater as the treatment target, it achieves the goal of continuous and large-capacity treatment through supercritical hydrothermal oxidation. The entire hydrothermal reactor body can easily achieve the sealing target of supercritical hydrothermal treatment and can be reused multiple times, which is green and pollution-free to the environment.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1As shown, this embodiment provides a hydrothermal conversion device for bamboo processing wastewater, including a vessel body and a vessel cover 5; the bottom of the vessel body is open, and the vessel cover 5 is located at the open bottom of the vessel body to seal the bottom of the vessel body; an ozone generator is installed at the top inside the vessel body for oxidizing organic nitrogen chemicals in the wastewater under supercritical hydrothermal conditions; a heating furnace 2 is installed in the upper middle part of the outside of the vessel body for heating the wastewater inside the vessel body; an insulation sleeve 3 is installed in the middle of the outside of the vessel body; a cold water sleeve 4 is installed in the lower middle part of the outside of the vessel body; and a feeding system is also included, with the discharge end of the feeding system penetrating the vessel cover 5 and communicating with the inside of the vessel body.

[0027] In this specific embodiment, the feeding system includes a booster pump 7 and a feeding tank 10; the inlet of the booster pump 7 is connected to the feeding tank 10, and the outlet of the booster pump 7 is connected to the interior of the vessel body through a pipeline passing through the vessel cover 5. The feeding tank 10 is used to store wastewater, and the booster pump 7 is used to pass the wastewater into the vessel body and pressurize and maintain the pressure.

[0028] A pressure gauge 8 is installed at the bottom of the vessel lid 5. The pressure gauge 8 is used to detect the pressure inside the vessel.

[0029] A radiation-proof and convection baffle 12 is installed at the top of the insulation sleeve 3 inside the vessel. The radiation-proof and convection baffle 12 is made of silver-plated zinc plate. The radiation-proof and convection baffle 12 is used to prevent the energy transfer such as heat radiation and micro-convection between the water in the upper part of the vessel under supercritical conditions and the water in the middle part of the vessel.

[0030] The hydrothermal conversion device for bamboo processing wastewater in this embodiment also includes a storage system, which includes a storage tank 14 and a discharge pipe 11. One end of the discharge pipe 11 is located at the top of the vessel body, and the other end of the discharge pipe 11 extends downward along the inside of the vessel body, passes through the vessel cover 5, and is connected to the storage tank 14.

[0031] The hydrothermal conversion device for bamboo processing wastewater in this embodiment also includes a temperature sensor 9. The temperature sensor 9 extends through the lid 5 to the top of the inner part of the vessel. The temperature sensor 9 is used to measure the supercritical hydrothermal temperature at the top of the vessel.

[0032] The vessel body and the vessel cover 5 are connected by fastening bolts 6. The cooling water jacket 4 is provided with a circulating water inlet and outlet 13. The cooling water jacket 4 is used to reduce the temperature at the bottom of the vessel body to below 220°C, so that polytetrafluoroethylene polymer material can be used as the sealing material between the vessel body and the vessel cover 5.

[0033] The hydrothermal conversion device for bamboo processing wastewater in this embodiment operates as follows:

[0034] First, bamboo wastewater is filled into the entire reactor using booster pump 7. Heating furnace 2 is used to heat the top of the reactor. Temperature sensor 9 monitors the temperature of the upper water body (H1 section) within the reactor, maintaining this temperature at 375-380℃. After the reactor is filled with aqueous liquid, the pressure rises to over 22.1 MPa within the 375-380℃ temperature range, achieving supercritical water treatment. The aqueous phase within the reactor is a continuous whole. Although radiation-proof and convection-proof baffles are installed, the overall temperature of the continuous liquid phase continues to rise. The temperature of section H1 is 375-380℃, section H2 is 330-220℃, and section H3, due to the cooling water jacket 4, has a temperature of 210-180℃.

[0035] Ozone is generated through partial hydrolysis in the upper part of the reactor via an inductive ozone generator 1, enabling supercritical hydrothermal oxidation of wastewater in section H1 within the reactor. This rapidly converts organic matter into CO2, H2O, N2, and other harmless small molecules. The reacted water is then discharged into storage tank 14 via discharge pipe 11, while wastewater from feed tank 10 is replenished into the reactor via booster pump 7, maintaining a pressure above 22.1 MPa. Through continuous pumping of wastewater, preheated by H2 and H3, the water enters the supercritical hydrothermal section H1, realizing a continuous supercritical hydrothermal oxidation reaction of the wastewater. The temperature at the bottom of the reactor (H3) is maintained below 220℃, significantly reducing the temperature resistance requirements of the reactor's seals. Ordinary polytetrafluoroethylene (PTFE) and other polymeric materials can be used as sealing rings, greatly improving the equipment's versatility and ease of use.

[0036] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A device for hydrothermal conversion of bamboo processing wastewater, characterized in that, The kettle body and kettle cover; the bottom of the kettle body is open, the kettle cover is arranged at the opening of the bottom of the kettle body, and the kettle cover is used for closing the bottom of the kettle body; the inner top of the kettle body is provided with an ozone generator, which is used for oxidation of organic nitrogen chemicals in wastewater under supercritical hydrothermal conditions; the kettle body is provided with a heating furnace in the middle and upper part of the outer part, which is used for heating the wastewater in the kettle body; the kettle body is provided with a heat preservation sleeve in the middle part of the outer part; the kettle body is provided with a cold water jacket in the middle and lower part of the outer part; It also includes a feeding system, and the discharge end of the feeding system penetrates the kettle cover and communicates with the inside of the kettle body. 2.The device for hydrothermal conversion of bamboo processing wastewater according to claim 1, characterized in that, The feeding system includes a booster pump and a feeding tank; the inlet of the booster pump communicates with the feeding tank, and the outlet of the booster pump communicates with the inside of the kettle body through a pipeline penetrating the kettle cover. 3.The device for hydrothermal conversion of bamboo processing wastewater according to claim 1, characterized in that, The bottom of the kettle cover is provided with a pressure gauge for detecting the pressure in the kettle body. 4.The device for hydrothermal conversion of bamboo processing wastewater according to claim 1, characterized in that, The kettle body is provided with a radiation-proof and convection baffle at the top of the heat preservation sleeve, which is used to prevent energy transfer between the supercritical condition water in the upper part of the kettle body and the water in the middle part of the kettle body. 5.The device for hydrothermal conversion of bamboo processing wastewater according to claim 4, characterized in that, The radiation-proof and convection baffle is a silver-plated zinc plate. 6.The device for hydrothermal conversion of bamboo processing wastewater according to claim 1, characterized in that, It also includes a storage system, which includes a storage tank and a discharge pipe; one end of the discharge pipe is located at the top of the kettle body, and the other end of the discharge pipe extends downward along the inside of the kettle body, penetrates the kettle cover and communicates with the storage tank. 7.The device for hydrothermal conversion of bamboo processing wastewater according to claim 1, characterized in that, It also includes a temperature measuring sensor, which extends to the inner top of the kettle body after penetrating the kettle cover, and is used for measuring the supercritical hydrothermal temperature of the inner top of the kettle body. 8.The device for hydrothermal conversion of bamboo processing wastewater according to claim 1, characterized in that, The cold water jacket is provided with a circulating water inlet and outlet. 9.The device for hydrothermal conversion of bamboo processing wastewater according to claim 1, characterized in that, The kettle body and the kettle cover are connected by fastening bolts.

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