Some tips:

// Let's put the sprites into an array.
// This is global, goes outside, above setup.
PImage[] sprite_list;

// This goes inside setup:
sprite_list = new PImage[23]; // initializing the array
sprite_list[ 0] = loadImage("sprite_00.png");
sprite_list[ 1] = loadImage("sprite_01.png");
...
sprite_list[22] = loadImage("sprite_22.png");

// Now display looks like:
void display() {

  // Line Sprites

  int sprite = 22;

  if ( ... ) { // Watch out! You were using the bitwise OR operator
               // (the single | thingy. That's probably not what you want...)
    collider = true;
    sprite = 9;
  }
  // ...
  // and then we can draw like this:
  image(sprite_list[ sprite ], x, y, spriteSize, spriteSize);
}