Does anyone know about multi-material slurry gasification technology?

There is a lot of information about multi-material slurries on the forum; give it a search

The new gasification technology using multi-component slurries belongs to the wet fluidized-bed pressurized gasification category. It involves carrying out a partial oxidation reaction between solid or liquid carbon-containing materials (including coal/petcoke/asphalt/oil/coal liquefaction residues) and a flowing phase (water, waste liquids, wastewater), using a slurry prepared by adding additives such as dispersants, stabilizers, pH regulators, wetting agents, and emulsifiers, with oxygen, in order to produce syngas primarily composed of CO and H2. Pressurized gasification of water-coal slurry is a specific type of multi-component slurry gasification. 1 Development Background: Building on years of research in coal gasification technology, particularly the experience and lessons gained from the development and industrial application of pressurized coal slurry gasification technology, and taking into account the domestic market conditions and demands, this technology development is driven by the following reasons: (1) To contribute to the implementation of the energy development strategy of \"replacing oil with coal\". (2) Addressing the problems that arise during the industrial application of water-coal slurry pressurized gasification technology facilitates longer-term safe and stable operation of the facilities, as well as overcoming the shortcomings of this gasification technique. (3) Obtain independent intellectual property rights and save on technology import costs. (4) Diversify the gasification feedstocks and expand the range of usable materials. With the support of **, Sinopec, CNPC, and various enterprises, it has successively undertaken and completed research on \"preparation of kerosene-water slurry and its gasification,\" \"emulsified coal tar-water slurry preparation and gasification,\" and \"coal tar pitch-water slurry preparation and gasification.\" It has also carried out a project funded by the Ministry of Science and Technology titled \"Research on the Development of New Gasification Technologies for Multi-component slurries.\" Effective research was conducted in collaboration with relevant enterprises, resulting in the successful development of a new multi-material slurry gasification technology (MCSG), which has been put into industrial use. 2 Technical Features, Innovations, and Key Technologies: The new gasification technology using mixed slurries employs process oxygen to carry out a partial oxidation reaction on slurries prepared from solid or liquid carbon-containing materials, thereby producing syngas (CO+H2). The process technologies include: slurry preparation, slurry gasification, raw gas washing, and wastewater treatment. The main technical features are: (1) Through research on slurry preparation techniques for different raw materials (especially those that are difficult to turn into slurry), the effective composition of the slurry is improved, thereby reducing consumption during the gasification process. (2) This technology has a wide range of raw material adaptability, including carbon-containing substances such as coal, petroleum coke, petroleum asphalt, residue oil, coal liquefaction residues, and biomass, as well as pulp waste liquids and organic wastewater. (3) Long-distance slurry transportation technology solves the problem of transporting slurries with high concentration and high viscosity. (4) The gasifier with a new structure features a simple design, safe and easy operation, and it also facilitates heat recovery and the protection of refractory materials, extending its service life by about twice. (5) The distinctive solid and liquid slag discharge process technologies not only solve the gasification problem of raw materials with high ash fusion points, but also address the issue of raw material compatibility from a technical perspective. (6) Through coal blending technology, resource allocation is optimized, which not only solves the problem of raw material slurry formation but also addresses the issue of ash melting point; this is one of the main features of multi-component slurries. (7) Unique graywater treatment technologies (Stage I–III heat exchange flash evaporation technology) reduce equipment investment and simplify the process flow. (8) Advanced and mature system amplification technology has solved the engineering challenges associated with gasification processes for devices of different scales and pressure levels. (9) The equipment is entirely domestically produced, requiring low investment with significant benefits. (10) It produces low levels of waste emissions, is environmentally friendly, and belongs to clean gasification technology. (11) Through over a decade of development and refinement, the multi-material slurry gasification technology has evolved into a complete and systematic set of patented gasification technologies. Key technical innovations: (1) Optimized design of the multi-component slurry composition, to improve the effective composition of the slurry and reduce system consumption ； (2) Multi-component slurry preparation process technology and additive technology ； (3) Multi-component slurry gasification process technology ； (4) Gasifier with new structure ； (5) Sludge treatment system and slag discharge technology ； (6) System amplification technology ； (7) Evaluation system for multi-component slurry gasification software. Key technologies developed through this technology: (1) Comprehensive slurry preparation technologies, including slurry composition optimization techniques, grinding media grading techniques, processes for preparing slurries from materials that are difficult to turn into slurries, additive technologies, and technologies for long-distance transportation of slurries. (2) The system’s multi-material slurry gasification technologies include slurry gasification process technology, gasification nozzle technology, gasifiers with new structures, gas cooling systems, slag discharge systems, as well as automatic control and temperature measurement systems for the gasification process. (3) Integrated raw gas washing and purification as well as ash water treatment technologies: simple heat exchange and flashing technologies, vacuum filtration technology, etc. 3. Industrial application achievements: Plants that have been put into industrial operation and are capable of operating stably over long periods of time – Zhejiang Fengden Company, with a 30,000 tons/year ammonia synthesis plant; Zhejiang Juhua Company, with a 60,000 tons/year methanol plant; Shandong Hualu Hengsheng Company, with a 300,000 tons/year ammonia synthesis plant. Projects for which technology transfer agreements have been signed and construction has begun – Shandong Hualu Hengsheng Chemical Co., Ltd., with a second-phase 200,000 tons/year methanol project; Inner Mongolia Sanwei Resources Group Co., Ltd., with a 200,000 tons/year methanol project; Huating Zhongxu Coal Chemical Co., Ltd., with a 600,000 tons/year methanol project; Inner Mongolia Yitai Coal-to-Oil Co., Ltd., with a 160,000 tons/year coal-to-oil project; Jutai Energy Inner Mongolia Co., Ltd., with a 600,000 tons/year methanol project; Shaanxi Xianyang Chemical Industry Co., Ltd., with a 600,000 tons/year methanol project; Shanxi Hualu Coal Chemical Co., Ltd., with a 200,000 tons/year methanol project; Huainan Chemical Group Co., Ltd., with a 300,000 tons/year ammonia synthesis plant; Inner Mongolia Nailun Group Co., Ltd., with a 300,000 tons/year ammonia synthesis plant. 4. Multi-material slurry projects and cooperation with engineering companies: Zhejiang Fengden project, in collaboration with Zhejiang Provincial Chemical Engineering Institute ； Zhejiang Juhua project, in collaboration with Juhua Group’s design institute ； Jiutai Project, in collaboration with Tianchen Company (First Academy) ； Yitai Project, in collaboration with Sinopec Ningbo Engineering Company (5th Institute) ； Huainan project, in collaboration with Donghua Engineering Technology Co., Ltd. (Third Academy) ； The remaining projects are carried out in collaboration with Hualu Engineering Technology Co., Ltd. (Academy 6). 5 Main tasks and progress of the multi-component slurry gasification technology 1. Raw material selection and evaluation (1) Analysis of raw materials: industrial analysis, elemental analysis, calorific value, ash melting point, ash composition, grindability index, reactivity, etc. (2) Pulp formation performance tests: concentration, viscosity, stability, pH value, bulk density, fluidity, particle size distribution, selection of additive types and addition amounts, etc. (3) Gasification performance evaluation: Simulated calculations and predictions are conducted for gasification temperature, pressure, gas composition, carbon conversion rate, gas yield, cold gas efficiency, specific raw material consumption, and specific oxygen consumption. (4) Recommended design basic data: The recommended design basic data mainly serves as a foundation and basis for PDP design. The main contents include: equipment products, production scale, production series, selection of pressure grades, properties of raw materials, properties of multi-component slurries, gasification performance indicators, consumption of major raw materials, output of major products, and emissions of waste gases, wastewater, and solid waste. The duration for the aforementioned tasks is one month. 2. Contents of the Process Design Package (PDP) (1) Design fundamentals: scope of work, design basics, project design data (2) Selection of raw materials (3) Process flow diagram (PFD): preparation of multi-component slurries, gasification of multi-component slurries, washing of process gases, treatment of ash water, mass and heat balance, overview of utilities and chemicals, overview of plant emissions. (4) Equipment specifications: equipment list, list of equipment manufacturers, equipment data sheets, and simplified diagrams of the equipment structure (containers, heat exchangers, tanks, pumps, and other equipment). (5) Principles for material selection (6) Process flow diagram with control points (PID) (7) Special instrument control systems (8) Unit operation manual (9) Analysis and others. The time required for the above tasks is three months. 3. Personnel Training: Analyze personnel training and training for process operators; the Northwest Institute of Chemical Engineering is responsible for arranging on-site training at industrial production facilities. 4. On-site technical services during commissioning 5. Fee structure: The technology transfer fee is calculated based on the production scale of the installed facility, with the fee rate being: total amount of CO+H2 produced in 24 hours × 4 RMB (4 RMB per cubic meter of CO+H2). No additional fees will be charged for coal type testing and evaluation, the development of process design software packages (PDP), technical services, or personnel training. This post was last edited by lhy on 2008-9-17 11:02.]

This post was last edited by GSP on 2010-11-18 09:12. In fact, the gasification technology using multiple feedstocks is similar to that of Texaco; there is basically no difference. Those who know Texaco know about multi-component slurries.

What was said upstairs is that this is a secret known to everyone.

The multi-component slurry is pumped into the process burner via a high-pressure slurry pump, and oxygen is also injected into the gasifier through the process burner to carry out the gasification reaction, resulting in crude gas. The oxygen supplied to the gasification furnace comes from the air separation unit. The multi-component slurry gasification reaction takes place in the combustion chamber of the gasifier, with a gasification temperature of approximately 1300–1420°C and a gasification pressure of 4.0–6.5 MPa (G). The gasification reaction produces raw gas, liquid slag, and fine ash particles. The unconverted components in the gasification feedstock, along with the liquid slag formed from part of the ash, flow together with the generated raw gas into the quench chamber at the lower part of the gasifier. The quench water that enters the quenching chamber of the gasifier comes from the graywater circulation pump. This quench water comes into contact with the high-temperature gas stream exiting from the slag outlet of the gasifier; part of this quench water vaporizes, thereby cooling the raw gas as well as the solid particles and slag carried along with it. Larger solid particles carried in the quench water entering the gasifier are removed by the black water filter. The slag is quenched and solidified, then sinks to the water bath at the bottom of the gasification furnace. The raw gas is cooled by direct contact with water, and most of the fine ash remains in the water. The raw gas passes through a quench chamber where some of the moisture contained in it is removed; it is then drawn out from an outlet located beside the gasifier, and after passing through a venturi tube and a scrubber tower for dust removal, it is sent to the downstream conversion unit. The black water discharged from the quench chamber of the gasifier is sent to the graywater system. Gasifier burner cooling water system: The burner cooling water circulates continuously through the water jacket and cooling coils located at the head of the process burner, thereby protecting the process burner from the high temperatures in the gasifier combustion chamber. The burner cooling water system consists of a burner cooling water tank, a burner cooling water pump, a burner cooling water heat exchanger, and a burner cooling water gas separator. The standby pump can start automatically in the event of a fault in the burner cooling water. A carbon monoxide analyzer installed at the vent of the burner cooling water gas separator can continuously monitor any gas that leaks into the burner cooling water system and issue warnings. When the burner cooling water pump fails, the burner cooling water is supplied from the emergency burner cooling water tank. Gasifier slag treatment system: The coarse slag that settles at the bottom of the gasifier quench chamber is carried to the lockhopper through the circulation of water flow. Large slag lumps are crushed using a slag crusher. Most of the ash discharged from the gasifier grate settles at the bottom of the lockhopper. The gasifier lockhopper discharges slag according to a preset program. The slag discharged from the lock hopper settles on the slag skimmer installed in the slag tank, and the skimmer removes it from the tank. In the raw gas washing system, the raw gas entering the venturi tube mixes with water from the graywater circulation pump; the fine ash is fully soaked by the water, and then it enters the water bath at the bottom of the washing tower, where most of the fine ash carried in the raw gas is removed from it. On the tray at the top of the scrubber tower, the thermally condensed liquid from the shift process further washes the raw gas. The water droplets entrained in the raw gas are separated in the demister above the tray. The crude gas, which contains virtually no fine ash, is sent from the scrubber tower to the shift system. The wash water enters the graywater system. In the graywater system, the graywater is preheated again and returned to the washing tower for reuse.

Domestically developed technology, widely applied. Compared to GE, the patent costs are much lower, but the performance is similar to or even exceeds that of GE. Support domestic technology; don’t let foreign technology completely dominate the domestic market

Supporting domestic technology; improvements are also a good thing.

It’s incredible that there are still people who don’t know about our multi-component slurry

China still doesn’t invest as much in research and development nor give it as much importance as foreign countries; even if they started from the same point back then, they are now far behind foreigners in terms of technological progress. Speaking of which, large state-owned enterprises bear a significant share of the responsibility; by using foreign technology, they can go abroad to eat, drink, and have fun, and in case of problems, the blame doesn’t fall on individual employees. Such things are quite common.