CN113266836B - Gasification furnace feeding process for treating organic waste liquid - Google Patents
Gasification furnace feeding process for treating organic waste liquid Download PDFInfo
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- CN113266836B CN113266836B CN202011175100.XA CN202011175100A CN113266836B CN 113266836 B CN113266836 B CN 113266836B CN 202011175100 A CN202011175100 A CN 202011175100A CN 113266836 B CN113266836 B CN 113266836B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2200/00—Details of gasification apparatus
- C10J2200/15—Details of feeding means
- C10J2200/152—Nozzles or lances for introducing gas, liquids or suspensions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a gasifier feeding process for treating organic waste liquid, which comprises a pulverized coal burner feeding system, an organic waste liquid feeding system and a burner cooling water system, wherein the pulverized coal burner feeding system comprises a pulverized coal storage tank, a pulverized coal discharging tank, a pulverized coal feeding tank, a pulverized coal filter and a pulverized coal burner; organic waste liquid feed system includes organic waste liquid buffer tank, organic waste liquid feed pump and waste liquid nozzle. The invention simultaneously gasifies the pulverized coal and the organic waste liquid, and realizes the high-efficiency conversion of the high-concentration organic waste liquid in the gasifier; the pulverized coal gasification reaction temperature is high, the organic waste liquid treatment effect is good, the waste water quality is good, the organic waste liquid is independently fired, the burner is simple and convenient to manufacture, the pulverized coal burner and the organic waste liquid burner are not interfered with each other in operation, and the operation flexibility is high; the top-arranged burner faces the central shaft of the gasification furnace, has little influence on the airflow field in the gasification furnace and the water-cooled wall of the reaction chamber, and is favorable for improving the treatment effect of organic waste liquid.
Description
Technical Field
The invention relates to a gasifier feeding process for treating organic waste liquid.
Background
At present, methods for treating organic waste liquid include incineration, solvent extraction, adsorption, oxidative decomposition, hydrolysis, biochemical methods, and coal gasification. The coal gasification method has the advantages of high treatment temperature, wide adaptability range of waste liquid, high treatment efficiency, good treatment effect and bright application prospect.
Organic wastewater and waste liquid which are high in concentration and difficult to treat can be generated in the production processes of refineries, chemical plants and coal-to-olefin plants, and the treatment technology of the waste liquid is difficult, the process is complex and the cost is high. The outlet temperature of the reaction chamber of the gasification furnace in the pulverized coal entrained flow gasification technology is generally 1400-1600 ℃. At this high temperature, the organic matter will decompose and burn to inorganic gases. The entrained flow gasification has the inherent advantages of treating waste liquid organic matters, and harmful substances such as the waste liquid organic matters and the like can generate gasification reaction in the gasification furnace to generate synthesis gas.
The existing combustion process has three types, wherein the first type is coal water slurry gasification, the second type is organic waste liquid independent burner side-mounted pulverized coal gasification, and the third type is organic waste liquid independent channel and pulverized coal shared burner. The three technologies can achieve the purpose of treating organic waste liquid, but application occasions all need corresponding gasification furnaces, the gasification furnaces of different technologies cannot be directly applied, and the mixed use has the problems that the combustion temperature does not reach the standard, the treatment effect is poor, and the combustion requirement cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a gasification furnace feeding process for treating organic waste liquid, which has high gasification reaction temperature of pulverized coal, good treatment effect of organic waste liquid, and high operation flexibility because the pulverized coal burner and the organic waste liquid burner do not interfere with each other.
The technical scheme adopted by the invention for solving the technical problems is as follows: a gasification furnace feeding process for treating organic waste liquid is characterized by comprising the following steps:
(1) pulverized coal burner feed
A. Conveying the normal-pressure coal powder to a pulverized coal storage tank V01 through machinery or pneumatic power, wherein the operating pressure of the pulverized coal storage tank V01 is 0.002MPag, and the temperature is 80 ℃;
B. opening a cut-off valve between the pulverized coal storage tank V01 and the pulverized coal discharging tank V02, and allowing the pulverized coal under normal pressure to enter the pulverized coal discharging tank V02 under the action of gravity;
C. after the pulverized coal discharging tank V02 reaches a set material level, an upstream valve and a downstream valve are cut off, a high-pressure carbon dioxide/nitrogen charging valve is opened, and the pulverized coal discharging tank V02 is charged to the same pressure as that of a pulverized coal feeding tank, namely, the pressure is 5.2 MPag;
D. opening a cut-off valve between a pulverized coal discharging tank V02 and a pulverized coal feeding tank V03, feeding pulverized coal into a pulverized coal feeding tank V03 under the action of gravity, and closing the cut-off valve after the material level of the pulverized coal discharging tank V02 drops to a given value; after the pulverized coal discharge tank V02 and the pulverized coal feed tank V03 are cut off, the discharge valve of the pulverized coal discharge tank V02 is opened to start pressure release, and pressure release gas carrying pulverized coal is discharged to the atmosphere after passing through a pulverized coal filter S01; when the pressure of the pulverized coal discharging tank V02 is discharged to be the same as the pressure of the pulverized coal storage tank V01, the cut-off valve at the inlet of the pulverized coal discharging tank V02 is opened, and the pulverized coal of the pulverized coal storage tank V01 is received; the operation pressure of the powder coal discharging tank V02 is 0-5.2MPag, and the circulation process of material receiving, pressurization, discharging, depressurization and material receiving is carried out;
E. pulverized coal in a pulverized coal feed tank V03 is conveyed to a pulverized coal burner A01 through a pulverized coal feeder X03 in a dense phase manner by carbon dioxide/nitrogen; the flow of the pulverized coal is regulated by a pulverized coal flow regulating valve FV 03;
F. and after passing through a pulverized coal burner A01, pulverized coal is dispersed into a gasification furnace R01.
(2) Organic waste liquid feed
A. The organic waste liquid from the upstream enters an organic waste liquid buffer tank V05 through a liquid level control valve LV 01; controlling the liquid in the organic waste liquid buffer tank V05 to be 20-80%; the operation pressure of the organic waste liquid buffer tank V05 is 0.5MPag, and the operation pressure is controlled by an inlet pressure regulating valve PV03 of the organic waste liquid buffer tank V05 low-pressure nitrogen (0.7MPag) and a discharge valve PV04 of the organic waste liquid buffer tank V05;
B. the waste liquid in the organic waste liquid buffer tank V05 is pressurized by an organic waste liquid feeding pump P02, so that the pressure at the outlet of the pump is higher than the pressure in the gasification furnace by more than 1.0MPa, and the organic waste liquid is completely atomized after passing through the burner; the outlet of the organic waste liquid feeding pump P02 is provided with a flow regulating valve FV04, so that the flow fluctuation range of the organic waste liquid is 80-110% of the normal flow;
C. atomizing the organic waste liquid by an organic waste liquid burner A02, and then feeding the organic waste liquid into a gasification furnace R01;
(3) burner cooling water circulation
A. Before the burner is put into use, a boiler water pipeline cut-off valve XV01 is opened, boiler water is introduced from the outside, a burner circulating cooling water buffer tank V04 is kept at a certain liquid level, the temperature of the boiler water is 180 ℃, and the pressure of the burner circulating cooling water buffer tank V04 is gradually increased to 0.5MPag from normal pressure;
B. cutting off a boiler water pipeline cut-off valve XV01, opening a high-pressure nitrogen charging valve PV01 at the inlet of a burner cooling water buffer tank V04, pressurizing the pressure of the burner cooling water buffer tank V04 to 5.0MPag, and simultaneously automatically charging a charging valve PV01 and a pressure relief valve PV02 to keep the pressure of the burner cooling water buffer tank V04 stable at 5.0 MPag;
C. starting a nozzle cooling water circulating pump P01, wherein the outlet pressure of the circulating pump is more than 7.0MPag, so as to overcome the pressure drop of cooling water in the pulverized coal nozzle and the organic waste liquid nozzle, and simultaneously, after the nozzles are ablated, the cooling water is sprayed into the gasification furnace, so that the synthesis gas is prevented from being mixed with the gasification furnace through a cooling water system;
D. adjusting an inlet valve SV01 of a cooling water protection channel of the pulverized coal burner to stabilize the flow of cooling water of the pulverized coal burner so as to protect the pulverized coal burner; adjusting an inlet valve SV02 of the organic waste liquid cooling water protection channel to stabilize the flow of the cooling water of the organic waste liquid burner so as to protect the organic waste liquid burner;
E. after the flow is regulated to a target value, SV01 and SV02 are locked at fixed valve positions, so that the pulverized coal burner A01 and the organic waste liquid burner A02 maintain constant flow;
F. and the circulating cooling water respectively passes through the pulverized coal burner A01 and the organic waste liquid burner A02, the temperature is raised, and the circulating cooling water returns to the burner cooling water buffer tank V04 after heat dissipation through a non-heat-insulating pipeline.
In the scheme, the upper part of the gasification furnace is a combustion chamber, the lower part of the gasification furnace is a chilling chamber, and the pulverized coal burner and the waste liquid burner are uniformly distributed on the top of the gasification furnace and are inserted into the upper port of the combustion chamber. The gasification furnace has the characteristic of a coaxial direct current limited flow field. Preferably, the vertical extension of central line along the gasifier of fine coal nozzle, the waste liquid nozzle is located fine coal nozzle side and top-down and arranges towards the slag outlet center of combustion chamber gradually. The top burner, and the burner is towards the gasifier center pin, and is little to the air current field influence in the gasifier, and is little to the influence of combustion chamber water-cooling wall, is favorable to improving combustion effect. The number of the pulverized coal burner and the waste liquid burner can be one or more. The waste liquid nozzle is independently arranged relative to the pulverized coal nozzle, the structure is simple, the manufacture is convenient, the pulverized coal nozzle and the waste liquid nozzle are not interfered with each other in operation, and the operation flexibility is high.
Further preferably, the included angle a between the waste liquid burner and the central line of the gasification furnace is 5-30 degrees, and further preferably 2-8 degrees.
Preferably, the gasifier comprises an outer shell, a partition plate capable of dividing the outer shell into an upper space and a lower space is arranged in the middle of the outer shell, a membrane wall internal part is arranged in the upper space, an inner cavity of the membrane wall internal part forms a combustion chamber, a reaction chamber annular space is formed between the outer wall of the membrane wall internal part and the outer shell, and the lower space forms a chilling chamber.
Preferably, the membrane wall internal member comprises a first conical section, a heated vertical section, a second conical section and a slag outlet section which are sequentially connected from top to bottom, the inner diameter of the first conical section is gradually increased from top to bottom, the inner diameter of the second conical section is gradually decreased from top to bottom, and the joint of the slag outlet section and the second conical section is a slag outlet.
Preferably, a chilled water distributor and a bubbling bed are arranged in the chilling chamber, and the lower end of the slag outlet section is connected with a descending pipe which can penetrate through the partition plate and extend to the position below the bubbling bed.
The structure is favorable for improving the combustion temperature and the organic waste liquid treatment effect and the quality of the waste water.
Compared with the prior art, the invention has the advantages that: the invention simultaneously gasifies the pulverized coal and the organic waste liquid, and realizes the high-efficiency conversion of the high-concentration organic waste liquid in the gasifier; the pulverized coal gasification reaction temperature is high, the organic waste liquid treatment effect is good, the waste water quality is good, the organic waste liquid is independently fired, the burner is simple and convenient to manufacture, the pulverized coal burner and the organic waste liquid burner are not interfered with each other in operation, and the operation flexibility is high; the top-arranged burner faces the central shaft of the gasification furnace, has little influence on the airflow field in the gasification furnace and the water-cooled wall of the reaction chamber, and is favorable for improving the treatment effect of organic waste liquid.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the invention;
fig. 2 is a schematic structural view of a gasification furnace according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, the gasifier feed process system for treating organic waste liquid of the present invention includes a pulverized coal burner feed system, an organic waste liquid feed system and a burner cooling water system, wherein the pulverized coal burner feed system includes a pulverized coal storage tank V01, a pulverized coal charging tank V02, a pulverized coal feed tank V03, a pulverized coal filter S01 and a pulverized coal burner a 01; the organic waste liquid feeding system comprises an organic waste liquid buffer tank V05, an organic waste liquid feeding pump P02 and a waste liquid burner A02; the burner cooling water system comprises a burner circulating cooling water buffer tank V04 and a burner circulating water pump P01, and the specific connection relationship conforms to the following process steps.
The gasifier feeding process for treating organic waste liquid in the embodiment comprises the following steps:
(1) pulverized coal burner feed
A. Conveying the normal-pressure coal powder to a pulverized coal storage tank V01 mechanically or pneumatically, wherein the operating pressure of the pulverized coal storage tank V01 is 0.002MPag, and the temperature is 80 ℃;
B. opening a cut-off valve between the pulverized coal storage tank V01 and the pulverized coal discharging tank V02, and allowing the pulverized coal under normal pressure to enter the pulverized coal discharging tank V02 under the action of gravity;
C. after the pulverized coal discharging tank V02 reaches a set material level, an upstream valve and a downstream valve are cut off, a high-pressure carbon dioxide/nitrogen charging valve is opened, and the pulverized coal discharging tank V02 is charged to the same pressure as that of a pulverized coal feeding tank, namely, the pressure is 5.2 MPag;
D. opening a cut-off valve between a pulverized coal discharging tank V02 and a pulverized coal feeding tank V03, feeding pulverized coal into a pulverized coal feeding tank V03 under the action of gravity, and closing the cut-off valve after the material level of the pulverized coal discharging tank V02 drops to a given value; after the pulverized coal discharge tank V02 and the pulverized coal feed tank V03 are cut off, the discharge valve of the pulverized coal discharge tank V02 is opened to start pressure release, and pressure release gas carrying pulverized coal is discharged to the atmosphere after passing through a pulverized coal filter S01; when the pressure of the pulverized coal discharging tank V02 is discharged to be the same as the pressure of the pulverized coal storage tank V01, the cut-off valve at the inlet of the pulverized coal discharging tank V02 is opened, and the pulverized coal of the pulverized coal storage tank V01 is received; the operation pressure of the powder coal discharging tank V02 is 0-5.2MPag, and the circulation process of material receiving, pressurization, discharging, decompression and material receiving is carried out;
E. pulverized coal in a pulverized coal feed tank V03 is conveyed to a pulverized coal burner A01 through a pulverized coal feeder X03 in a dense phase manner by carbon dioxide/nitrogen; the flow of the pulverized coal is regulated by a pulverized coal flow regulating valve FV 03;
F. and after passing through a pulverized coal burner A01, pulverized coal is dispersed into a gasification furnace R01.
(2) Organic waste liquid feed
A. The organic waste liquid from the upstream enters an organic waste liquid buffer tank V05 through a liquid level control valve LV 01; controlling the liquid in the organic waste liquid buffer tank V05 to be 20-80%; the operation pressure of the organic waste liquid buffer tank V05 is 0.5MPag, and the operation pressure is controlled by an inlet pressure regulating valve PV03 of the organic waste liquid buffer tank V05 low-pressure nitrogen (0.7MPag) and a discharge valve PV04 of the organic waste liquid buffer tank V05;
B. the waste liquid in the organic waste liquid buffer tank V05 is pressurized by an organic waste liquid feeding pump P02, so that the pressure of the outlet of the pump is higher than the pressure in the gasification furnace by more than 1.0MPa, and the organic waste liquid is completely atomized after passing through the burner; the outlet of the organic waste liquid feeding pump P02 is provided with a flow regulating valve FV04, so that the flow fluctuation range of the organic waste liquid is 80-110% of the normal flow;
C. atomizing the organic waste liquid by an organic waste liquid burner A02, and then feeding the organic waste liquid into a gasification furnace R01;
(3) burner cooling water circulation
A. Before the burner is put into use, a boiler water pipeline cut-off valve XV01 is opened, boiler water is introduced from the outside, a burner circulating cooling water buffer tank V04 is kept at a certain liquid level, the temperature of the boiler water is 180 ℃, and the pressure of the burner circulating cooling water buffer tank V04 is gradually increased to 0.5MPag from normal pressure;
B. cutting off a boiler water pipeline cut-off valve XV01, opening a high-pressure nitrogen charging valve PV01 at the inlet of a burner cooling water buffer tank V04, pressurizing the pressure of the burner cooling water buffer tank V04 to 5.0MPag, and simultaneously automatically charging a charging valve PV01 and a pressure relief valve PV02 to keep the pressure of the burner cooling water buffer tank V04 stable at 5.0 MPag;
C. starting a nozzle cooling water circulating pump P01, wherein the outlet pressure of the circulating pump is more than 7.0MPag, so as to overcome the pressure drop of cooling water in the pulverized coal nozzle and the organic waste liquid nozzle, and simultaneously, after the nozzles are ablated, the cooling water is sprayed into the gasification furnace, so that the synthesis gas is prevented from being mixed with the gasification furnace through a cooling water system;
D. adjusting an inlet valve SV01 of a cooling water protection channel of the pulverized coal burner to stabilize the flow of cooling water of the pulverized coal burner so as to protect the pulverized coal burner; adjusting an inlet valve SV02 of the organic waste liquid cooling water protection channel to stabilize the flow of the cooling water of the organic waste liquid burner so as to protect the organic waste liquid burner;
E. after the flow is regulated to a target value, SV01 and SV02 are locked at fixed valve positions, so that the pulverized coal burner A01 and the organic waste liquid burner A02 maintain constant flow;
F. and the circulating cooling water respectively passes through the pulverized coal burner A01 and the organic waste liquid burner A02, the temperature is raised, and the circulating cooling water returns to the burner cooling water buffer tank V04 after heat dissipation through a non-heat-insulating pipeline.
As shown in fig. 2, the gasification furnace R01 of the present embodiment has a combustion chamber 1 at the upper part and a chilling chamber 2 at the lower part, and the pulverized coal burner a01 and the waste liquid burner a02 are uniformly arranged at the top of the gasification furnace R01 and are inserted into the upper port of the combustion chamber 1. The gasifier R01 has the characteristic of a coaxial direct current restricted flow field.
The pulverized coal burner A01 vertically extends along the center line of the gasifier R01, and the waste liquid burner A02 is located beside the pulverized coal burner A01 and gradually faces the center of the slag outlet 10 of the combustion chamber 1 from top to bottom. The top-mounted burner is towards the central shaft of the gasification furnace, has little influence on an airflow field in the gasification furnace and on a water-cooled wall of a combustion chamber, and is favorable for improving the combustion effect. The number of the pulverized coal burner A01 and the waste liquid burner A02 can be one or more. Waste liquid nozzle A02 is independently arranged for fine coal nozzle A01, simple structure, and the preparation is convenient, and fine coal nozzle and waste liquid nozzle operation mutual noninterference, and the flexibility of operation is high. The included angle a between the waste liquid burner A02 and the central line of the gasifier R01 is 5-30 degrees.
The gasification furnace R01 of the embodiment comprises an outer shell 3, a partition plate 4 which can divide the outer shell 3 into an upper space and a lower space is arranged in the middle of the outer shell 3, a membrane water wall internal part 5 is arranged in the upper space, the inner cavity of the membrane water wall internal part 5 forms a combustion chamber 2, a reaction chamber annular space 6 is formed between the outer wall of the membrane water wall internal part 5 and the outer shell 3, and the lower space forms a chilling chamber 2. The membrane type water-cooled wall internal part 5 comprises a first conical section 51, a heated vertical section 52, a second conical section 53 and a slag outlet section 54 which are sequentially connected from top to bottom, wherein the inner diameter of the first conical section 51 is gradually increased from top to bottom, the inner diameter of the second conical section 53 is gradually decreased from top to bottom, and the joint of the slag outlet section 54 and the second conical section 53 is a slag outlet 10. The chilling chamber 2 is internally provided with a chilling water distributor and a bubbling bed 7, and the lower end of the slag outlet section 54 is connected with a down pipe 8 which can penetrate through the partition plate 4 and extend to the lower part of the chilling water distributor and the bubbling bed 7.
The structure is favorable for improving the combustion temperature and the organic waste liquid treatment effect and the waste water quality.
Claims (7)
1. A gasification furnace feeding process for treating organic waste liquid is characterized by comprising the following steps:
(1) pulverized coal burner feed
A. Conveying the normal-pressure coal powder to a pulverized coal storage tank V01 mechanically or pneumatically, wherein the operating pressure of the pulverized coal storage tank V01 is 0.002MPag, and the temperature is 80 ℃;
B. opening a shut-off valve between the pulverized coal storage tank V01 and the pulverized coal charging bucket V02, and allowing the atmospheric pulverized coal to enter the pulverized coal charging bucket V02 under the action of gravity;
C. after the pulverized coal discharging tank V02 reaches a set material level, an upstream valve and a downstream valve are cut off, a high-pressure carbon dioxide/nitrogen charging valve is opened, and the pulverized coal discharging tank V02 is charged to the same pressure as that of a pulverized coal feeding tank, namely 5.2 MPag;
D. opening a cut-off valve between a pulverized coal discharging tank V02 and a pulverized coal feeding tank V03, feeding pulverized coal into a pulverized coal feeding tank V03 under the action of gravity, and closing the cut-off valve after the material level of the pulverized coal discharging tank V02 drops to a given value; after the pulverized coal discharge tank V02 and the pulverized coal feed tank V03 are cut off, the discharge valve of the pulverized coal discharge tank V02 is opened to start pressure release, and pressure release gas carrying pulverized coal is discharged to the atmosphere after passing through a pulverized coal filter S01; when the pressure of the pulverized coal discharging tank V02 is discharged to be the same as the pressure of the pulverized coal storage tank V01, the cut-off valve at the inlet of the pulverized coal discharging tank V02 is opened, and the pulverized coal of the pulverized coal storage tank V01 is received; the operation pressure of the powder coal discharging tank V02 is 0-5.2MPag, and the circulation process of material receiving, pressurization, discharging, decompression and material receiving is carried out;
E. pulverized coal in a pulverized coal feed tank V03 is conveyed to a pulverized coal burner A01 through a pulverized coal feeder X03 in a dense phase manner by carbon dioxide/nitrogen; the flow of the pulverized coal is regulated by a pulverized coal flow regulating valve FV 03;
F. after passing through a pulverized coal burner A01, pulverized coal is dispersed and enters a gasification furnace R01;
(2) organic waste liquid feed
A. The organic waste liquid from the upstream enters an organic waste liquid buffer tank V05 through a liquid level control valve LV 01; controlling the liquid in the organic waste liquid buffer tank V05 to be 20-80%; the operation pressure of the organic waste liquid buffer tank V05 is 0.5MPag, and the operation pressure is controlled by an inlet pressure regulating valve PV03 of the organic waste liquid buffer tank V05 and a discharge valve PV04 of the organic waste liquid buffer tank V05;
B. the waste liquid in the organic waste liquid buffer tank V05 is pressurized by an organic waste liquid feeding pump P02, so that the pressure of the outlet of the pump is higher than the pressure in the gasification furnace by more than 1.0MPa, and the organic waste liquid is completely atomized after passing through the burner; the outlet of the organic waste liquid feeding pump P02 is provided with a flow regulating valve FV04, so that the flow fluctuation range of the organic waste liquid is 80-110% of the normal flow;
C. atomizing the organic waste liquid by an organic waste liquid burner A02, and then feeding the organic waste liquid into a gasification furnace R01;
(3) burner cooling water circulation
A. Before the burner is put into use, a boiler water pipeline cut-off valve XV01 is opened, boiler water is introduced from the outside, a burner circulating cooling water buffer tank V04 is kept at a certain liquid level, the temperature of the boiler water is 180 ℃, and the pressure of the burner circulating cooling water buffer tank V04 is gradually increased to 0.5MPag from normal pressure;
B. cutting off a boiler water pipeline cut-off valve XV01, opening a high-pressure nitrogen charging valve PV01 at the inlet of a burner cooling water buffer tank V04, pressurizing the pressure of the burner cooling water buffer tank V04 to 5.0MPag, and simultaneously automatically charging a charging valve PV01 and a pressure relief valve PV02 to keep the pressure of the burner cooling water buffer tank V04 stable at 5.0 MPag;
C. starting a nozzle cooling water circulating pump P01, wherein the outlet pressure of the circulating pump is more than 7.0MPag, so as to overcome the pressure drop of cooling water in the pulverized coal nozzle and the organic waste liquid nozzle, and simultaneously, after the nozzles are ablated, the cooling water is sprayed into the gasification furnace, so that the synthesis gas is prevented from being mixed with the gasification furnace through a cooling water system;
D. adjusting an inlet valve SV01 of a cooling water protection channel of the pulverized coal burner to stabilize the flow of cooling water of the pulverized coal burner so as to protect the pulverized coal burner; adjusting an inlet valve SV02 of the organic waste liquid cooling water protection channel to stabilize the flow of the cooling water of the organic waste liquid burner so as to protect the organic waste liquid burner;
E. after the flow is regulated to a target value, SV01 and SV02 are locked at fixed valve positions, so that the pulverized coal burner A01 and the organic waste liquid burner A02 maintain constant flow;
F. and the circulating cooling water respectively passes through the pulverized coal burner A01 and the organic waste liquid burner A02, the temperature is raised, and the circulating cooling water returns to the burner cooling water buffer tank V04 after heat dissipation through a non-heat-insulating pipeline.
2. The gasifier feeding process for treating organic waste liquid according to claim 1, wherein: the upper part of the gasification furnace is a combustion chamber, the lower part of the gasification furnace is a chilling chamber, and the pulverized coal burner and the waste liquid burner are uniformly distributed on the top of the gasification furnace and are inserted with the upper port of the combustion chamber.
3. The gasifier feeding process for treating organic waste liquid according to claim 2, wherein: the vertical extension of central line along the gasifier of fine coal nozzle, the waste liquid nozzle is located fine coal nozzle side and top-down and arranges towards the slag export center of combustion chamber gradually.
4. The gasifier feeding process for treating organic waste liquid according to claim 3, characterized in that: and the included angle a between the waste liquid burner and the central line of the gasification furnace is 5-30 degrees.
5. The gasifier feeding process for treating organic waste liquid according to claim 2, characterized in that: the gasification furnace comprises a shell, a partition plate capable of dividing the shell into an upper space and a lower space is arranged in the middle of the shell, a membrane water-cooling wall internal part is arranged in the upper space, an inner cavity of the membrane water-cooling wall internal part forms a combustion chamber, a reaction chamber annular space is formed between the outer wall of the membrane water-cooling wall internal part and the shell, and the lower space forms a chilling chamber.
6. The gasifier feeding process for treating organic waste liquid according to claim 5, characterized in that: the membrane type water-cooled wall internal part comprises a first conical section, a heated vertical section, a second conical section and a slag outlet section which are sequentially connected from top to bottom, wherein the inner diameter of the first conical section is gradually increased from top to bottom, the inner diameter of the second conical section is gradually decreased from top to bottom, and the joint of the slag outlet section and the second conical section is a slag outlet.
7. The gasifier feeding process for treating organic waste liquid according to claim 6, wherein: the chilling chamber is internally provided with a chilling water distributor and a bubbling bed, and the lower end of the slag outlet section is connected with a down pipe which can penetrate through the partition plate and extend to the lower part of the bubbling bed.
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