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CN-116850903-B - Gas-solid reactor for on-line improving solid reaction activity

CN116850903BCN 116850903 BCN116850903 BCN 116850903BCN-116850903-B

Abstract

The invention provides a gas-solid reactor for on-line improving the reactivity of solids, which comprises an inner reactor cylinder, wherein the inner reactor cylinder is divided into an activation section and a reaction section, the activation section is connected with a solid particle feeding device, a reaction gas feeding device and a high-temperature air flow feeding device, and the reaction section is connected with a product gas guiding device, a heating system and a solid particle discharging device, wherein the solid particles fed into the activation section are firstly activated by contacting with the high-temperature air flow fed into the bottom, so that the reactivity is improved, and then the solid particles are contacted with the reaction gas to start the reaction. The gas-solid reactor can perform on-line activation treatment on solid particles, effectively improves the value of final products, improves the efficiency of the reactor, saves external energy to the greatest extent, effectively solves the problems encountered in the actual gas-solid reaction, realizes the organized contact of the solid particles and reaction gas, has controllable activity and controllable consumption of the solid particles, and reduces the equipment maintenance requirement and the comprehensive treatment cost.

Inventors

  • CHEN DEZHEN
  • GE SHAOHENG

Assignees

  • 同济大学

Dates

Publication Date
20260505
Application Date
20230705

Claims (11)

  1. 1. A gas-solid reactor for on-line enhanced solid reactivity, comprising: the reactor inner cylinder is divided into an activation section and a reaction section along the horizontal direction; A solid particle feeding means connected to the head end of the activation section for feeding solid particles used as a reaction raw material or catalyst; A reaction gas supply device connected with the head end or the tail end of the activation section for supplying reaction gas; The high-temperature gas flow feeding device is arranged at the bottom of the activation section and is used for feeding high-temperature gas flow from the bottom to activate the solid particles in the activation section, and the high-temperature gas flow does not directly contact the reaction gas, but passes through the solid particles and then contacts the reaction gas; The product gas guiding device is connected with the tail end of the reaction section and is used for guiding out the product gas after the reaction of the solid particles and the reaction gas; a heat supply system arranged outside the reaction section for supplying a heat source required for the reaction section and heating and maintaining the solid particles and the reaction gas inside from the outside of the reaction section by the heat source, and The solid particle discharge device is connected with the tail end of the reaction section and is used for cooling and discharging the reacted solid particles; wherein the length of the activation section is L1, the length of the reaction section is L2, the length ratio of the activation section to the reaction section is L1/L2=0.35-0.5, The outside of the activation section and the outside of the reaction section are separated by a heat insulation layer made of heat insulation materials.
  2. 2. The gas-solid reactor for on-line enhanced solid reactivity according to claim 1, wherein: The reactor inner cylinder is divided into an activation section and a reaction section along the horizontal direction, the feeding amount of the high-temperature air flow is smaller than that of the reaction gas, and the temperature of the high-temperature air flow is higher than that of the solid particles fed by the solid particle feeding device.
  3. 3. The gas-solid reactor for on-line enhanced solid reactivity according to claim 1, wherein: wherein the inner cylinder of the reactor is a rotary kiln, The solid particles are driven to advance in the inner reactor cylinder by the rotation of the inner reactor cylinder.
  4. 4. The on-line enhanced solids reactive gas-solid reactor of claim 1, further comprising: wherein, a solid particle pushing device is arranged in the reactor and comprises a spiral blade arranged in the inner cylinder of the reactor and a motor for driving the spiral blade to rotate; Wherein the solid particles are pushed to advance in the inner reactor cylinder by the solid particle pushing device.
  5. 5. The gas-solid reactor for on-line enhanced solid reactivity according to claim 1, wherein: Wherein the cylinder wall of the activation section is uniformly provided with pores, The size of the pores is 0.35-0.7 times of the average size of the solid particles, and the aperture ratio is 15-25%.
  6. 6. The gas-solid reactor for on-line enhanced solid reactivity according to claim 1, wherein: Wherein the included angle alpha between the solid particle pavement in the activation section and the axis is more than or equal to 90 degrees.
  7. 7. The gas-solid reactor for on-line enhanced solid reactivity according to claim 1, wherein: The included angle beta=30-45 degrees between the high-temperature air flow entering the cambered surface and the axis in the activation section, and the holes on the circumference part outside the high-temperature air flow entering the cambered surface are covered by the heat insulation layer.
  8. 8. The gas-solid reactor for on-line enhanced solid reactivity according to claim 1, wherein: Wherein the solid particle feeding device is a screw feeder, a chute feeder or a star feeder provided with a discharging hopper.
  9. 9. The gas-solid reactor for on-line enhanced solid reactivity according to claim 1, wherein: wherein the heating system is a heating jacket, The heating jacket has a heating air flow inlet and a heating air flow outlet and circulates a heating air flow therein.
  10. 10. The gas-solid reactor for on-line enhanced solid reactivity according to claim 1, wherein: wherein, the top of the tail end of the reaction section is provided with a product gas outlet connected with a product gas guiding device, The product gas outlet is provided with particle blocking means to prevent solid particles from being carried into the product gas stream.
  11. 11. The gas-solid reactor for on-line enhanced solid reactivity according to claim 1, wherein: The solid particle discharging device is a spiral discharging machine provided with a water-cooling jacket or a rotary cooling cylinder provided with a water-cooling or air-cooling jacket.

Description

Gas-solid reactor for on-line improving solid reaction activity Technical Field The invention relates to the technical field of solid waste resource utilization, in particular to a gas-solid reactor for on-line improving solid reaction activity. Background The gas-solid reaction is a kind of reaction which is practically used in a very large number, such as flue gas purification, a reaction of a catalyst and a gas, gasification of solid powder, a combustion reaction, a reforming reaction, and the like. Reactors currently used for gas-solid reactions include fixed beds, fluidized beds, moving beds, and the like. For solid particle combustion, the task of the reactor is to ensure good gas-solid contact, the target reaction is complete, and no consideration is given to changing the properties of the solid particles. However, there are gas-solid reactions that produce combustible gas, such as reforming reactions of volatile matter and catalyst, gasification reactions of carbon powder, and the heat value and composition of the produced combustible gas are required, and the heat value of the produced combustible gas cannot be reduced. In addition, the reactor needs to be sealed and not leak, otherwise a fire may be initiated. Importantly, the gas-solid reactor also requires maintenance of the reactivity of the solids and timely replacement of the deactivated solid particles. The existing fixed bed reactor is suitable for non-industrialized gasification reaction, combustion reaction and catalyst reaction, but can not ensure the activity of the solid catalyst, and is particularly troublesome to replace. For example, in Fischer Tropsch synthesis, the fixed bed formed by the catalyst must be cooled and replaced completely after a certain period of use, and the activity of the catalyst cannot be maintained. For example, fluidized beds are suitable for gasification, combustion and catalytic reactions, but are severely frayed and do not maintain catalyst activity. The moving bed reactor is expected to maintain catalytic activity in the reaction process, but the traditional moving bed reactor is difficult to realize direct and organized contact of gas and solid, and the activity and consumption of solid particles cannot be accurately controlled. In addition, the existing fixed bed reactor also has the problems of complicated heating of a heat exchanger and high equipment maintenance requirement. Disclosure of Invention The present invention has been made to solve the above problems, and an object of the present invention is to provide a gas-solid reactor for improving the reactivity of solids on line. The invention provides a gas-solid reactor for on-line solid reaction activity promotion, which is characterized by comprising an inner reactor cylinder, a solid particle feeding device, a reaction gas feeding device, a high-temperature airflow feeding device, a product gas guiding device and a heating system, wherein the inner reactor cylinder is horizontally divided into an activation section and a reaction section, the solid particle feeding device is connected with the head end of the activation section and is used for feeding solid particles serving as a reaction raw material or a catalyst, the reaction gas feeding device is connected with the head end or the tail end of the activation section and is used for feeding reaction gas, the high-temperature airflow feeding device is arranged at the bottom of the activation section and is used for feeding high-temperature airflow from the bottom to activate the solid particles in the activation section, the product gas guiding device is connected with the tail end of the reaction section and is used for guiding out product gas after the solid particles and the reaction gas react, the heating system is arranged at the outer side of the reaction section and is used for heating and preserving heat of the internal solid particles and the reaction gas from the outer side of the reaction section through the heat source, the solid particle discharging device is connected with the tail end of the reaction section and is used for cooling and discharging the solid particles after the reaction, the reaction section, the length of the activation section is L1, the length of the reaction section is L2, the length of the activation section and the length of the activation section is L1/L2 and the length of the thermal insulation layer after the reaction section is equal to or less than or equal to or 0, and the length. The gas-solid reactor for on-line improving the solid reaction activity can be characterized in that the inner reactor cylinder is a rotary kiln, and solid particles are driven to advance in the inner reactor cylinder by the rotation of the inner reactor cylinder. The gas-solid reactor for online lifting of solid reaction activity provided by the invention can be further characterized in that a solid particle pushing device is arranged in the reactor and comprises a spiral b