Abstract: In a tower integrated by the heating and drying section and the cooling section, both sides of the heating and drying section housing are provided with an air inlet box and an air outlet box; the air inlet box is communicating with a heat exchanger and distribution pipes in the heating and drying section housing, the air outlet box is communicating with distribution pipes in the heating and drying section housing and a dust remover; both sides of the cooling section housing are provided with an air inlet box and an air outlet box; the air inlet box is communicating with a heat exchanger and distribution pipes in the cooling section housing; the air outlet box is communicating with distribution pipes in the cooling section housing and a dust remover. The integral device improves the heat exchange effect and preventing the polypropylene particles from aging.

Abstract: A deep-sea crawling robot and a crawling method thereof are provided. The deep-sea crawling robot includes a crawling robot body and a countertop, wherein a top of the crawling robot body is fixedly connected to the countertop, left and right sides of a bottom of the crawling robot body are respectively provided with crawler belts, and left and right sides of the countertop are respectively provided with weight-increasing auxiliary crawling mechanisms; and an outer plate is fixedly connected to a front side or back side of the countertop, a multifunctional propelling mechanism is arranged on the outer plate, and a rapid dewatering mechanism is arranged in a chamber of the countertop. The deep-sea crawling robot can not only accelerate the propulsion and crawling speed when it is on the seabed but also further enhance its stability during the crawling process on the seabed.

Abstract: An apparatus for removing VOC in polypropylene by steaming process includes: a cyclone separator, used for separating polypropylene particles and entraining gas from an upstream pneumatic system; a preheating tower, communicating with a discharge hole of the cyclone separator, a first steam inlet being provided on a tower body of the preheating tower, and a tail gas outlet being provided on top of the preheating tower; and a devolatilization tower, communicating with a discharge hole of the preheating tower, a second steam inlet being provided on a tower body of the devolatilization tower, a steam outlet being provided on top of the tower, and the steam outlet being communicating with the first steam inlet.